Implement write method to support metadata update

Read and store flac metadata
Add rename of the files with keeping the state
2026-06-27 00:16:04 +02:00 · 2026-06-26 23:27:33 +02:00 · 2026-06-26 20:54:01 +02:00 · 2026-06-26 20:25:33 +02:00 · 2026-06-26 19:53:50 +02:00 · 2026-06-26 17:56:56 +02:00
121 changed files with 3524 additions and 29038 deletions
@@ -1 +1,8 @@
-use flake
+#!/usr/bin/env bash
 export GIT_CONFIG_GLOBAL=/dev/null
 eval "$(devenv direnvrc)"
 # You can pass flags to the devenv command
 # For example: use devenv --impure --option services.postgres.enable:bool true
 use devenv
@@ -50,3 +50,30 @@ rustc-ice-*.txt
 dev/
 .sisyphus/
 # Devenv
 .devenv*
 devenv.local.nix
 devenv.local.yaml
 # direnv
 .direnv
 # pre-commit
 .pre-commit-config.yaml
 # Devenv
 .devenv*
 devenv.local.nix
 devenv.local.yaml
 # direnv
 .direnv
 # pre-commit
 .pre-commit-config.yaml
 # Added by cargo
 /target
@@ -1,295 +0,0 @@
 # AGENTS.md — beetfs/musicfs
 > Everything an AI agent needs to get work done on this project.
 ---
 ## Quick Start
 ```bash
 cd beetfs/musicfs
 nix develop                    # Enter dev shell (ALL tooling provided)
 cargo check                    # Verify compilation
 cargo test                     # Run all tests (162 tests, ~10s)
 cargo build --release          # Build release binary
 ```
 **No `rustup`, no `apt install`, no manual dependency management.** The Nix flake provides everything: Rust stable + rust-analyzer + clippy + rustfmt, FUSE3, SQLite, OpenSSL, protobuf, grpcurl, cargo-nextest, cargo-criterion, lld linker.
 ---
 ## Project Overview
 MusicFS is a **read-only FUSE filesystem** that presents music libraries organized by metadata (artist/album/track) instead of physical file paths. It supports multiple storage backends (local, NFS, S3, SFTP), content-addressable caching with delta sync, and full-text search.
 **Key constraint**: Read-only. Never modifies origin files. Never pushes changes to the origin server.
 ---
 ## Repository Layout
 ```
 beetfs/
 ├── musicfs/                        # Rust implementation (active)
 │   ├── Cargo.toml                  # Workspace root
 │   ├── flake.nix                   # Nix dev shell
 │   ├── .cargo/config.toml          # LLD linker, aliases (t/c/b)
 │   ├── crates/                     # 11 workspace crates
 │   │   ├── musicfs-cli/            # Binary entry point (clap)
 │   │   ├── musicfs-core/           # Types, errors, config, events
 │   │   ├── musicfs-fuse/           # FUSE ops (fuser)
 │   │   ├── musicfs-metadata/       # Audio parsing (symphonia)
 │   │   ├── musicfs-cache/          # Cache: tree, metadata, patterns, eviction
 │   │   ├── musicfs-cas/            # Content-addressable store (sled + chunks)
 │   │   ├── musicfs-origins/        # Origin backends: local, NFS, SMB, S3, SFTP
 │   │   ├── musicfs-sync/           # Delta sync, CDC chunking (fastcdc), watcher
 │   │   ├── musicfs-search/         # Full-text search (tantivy)
 │   │   ├── musicfs-grpc/           # gRPC control API (tonic + prost)
 │   │   └── musicfs-plugins/        # Plugin system (native .so + WASM)
 │   ├── tests/
 │   │   ├── e2e/e2e_players.rs      # E2E: mpv/VLC playback (manual, #[ignore])
 │   │   └── integration/            # (placeholder)
 │   └── dist/                       # Deployment
 │       ├── musicfs.service          # systemd unit
 │       ├── config.example.toml      # Example config
 │       ├── logrotate.d/musicfs      # Log rotation
 │       ├── PKGBUILD                 # Arch package
 │       └── musicfs.spec             # RPM spec
 ├── docs/
 │   ├── templates/
 │   │   ├── bluedoc.md              # Full design doc (5-20+ pages)
 │   │   └── greendoc.md             # One-pager (1-2 pages)
 │   ├── v2/
 │   │   ├── architecture.md         # System design (GOLDEN — source of truth)
 │   │   ├── requirements.md         # Functional + non-functional requirements
 │   │   ├── development-plan.md     # Implementation roadmap (weeks 1-14)
 │   │   └── plans/                  # Weekly plans, feature plans, research
 │   └── v1/                         # Original Python beetfs docs (reference only)
 └── beetsplug/beetFs.py             # Original Python implementation (archived)
 ```
 ---
 ## Build & Test Commands
 ```bash
 # Cargo aliases (.cargo/config.toml)
 cargo t                            # cargo test
 cargo c                            # cargo check
 cargo b                            # cargo build
 # Common workflows
 cargo check                        # Fast compile check
 cargo test                         # All tests
 cargo test -p musicfs-core         # Single crate
 cargo clippy                       # Lint
 cargo fmt                          # Format
 cargo nextest run                  # Parallel test runner (faster)
 # gRPC
 cargo build -p musicfs-grpc        # Triggers proto codegen via build.rs
 grpcurl -unix /run/musicfs.sock musicfs.v1.MusicFS/GetStatus
 # Watch mode
 cargo watch -x 'check' -x 'test'
 # Release
 cargo build --release
 ```
 **Proto file location**: `crates/musicfs-grpc/proto/musicfs.proto` (codegen via `tonic-build` in `build.rs`)
 ---
 ## Architecture
 **Read the full design**: [`docs/v2/architecture.md`](docs/v2/architecture.md) — this is the source of truth for all architectural decisions, component design, data schemas, API definitions, and diagrams.
 **Quick orientation** — MusicFS is a workspace of 11 crates. The dependency flow is:
 `musicfs-cli` → `musicfs-fuse` / `musicfs-grpc` / `musicfs-search` → `musicfs-core` → `musicfs-cache` / `musicfs-origins` / `musicfs-metadata` → `musicfs-cas` → `musicfs-sync`
 Key concepts: Virtual Tree (in-memory directory structure from metadata), CAS (content-addressable chunk storage with sled index), Origin Federation (multi-backend with failover and health monitoring), CDC (content-defined chunking for delta sync), Event Bus (tokio broadcast for cross-component notifications).
 For performance targets, scalability requirements, and quantitative constraints, see [`docs/v2/requirements.md`](docs/v2/requirements.md).
 ---
 ## Code Conventions
 ### Rust
 - **Edition**: 2021, **MSRV**: 1.75+
 - **Linker**: LLD via clang (configured in `.cargo/config.toml`)
 - **Error handling**: `thiserror` for library errors, `anyhow` for CLI
 - **Async**: `tokio` runtime, `async-trait` for trait objects
 - **Concurrency**: `parking_lot` for hot-path locks, `dashmap` for concurrent maps, `std::sync::RwLock` elsewhere
 - **Logging**: `tracing` with structured fields (`#[instrument]`, `info!`, `debug!`, etc.)
 - **Serialization**: `serde` + `toml` for config, `rmp-serde` (msgpack) for binary data, `prost` for protobuf
 ### Never Do
 - `as any`, `@ts-ignore` equivalents — no `unsafe` without justification
 - Empty `catch` / `let _ = result` on operations that can fail meaningfully
 - Suppress type errors
 - Commit secrets or credentials
 ### Testing Patterns
 - **Fixtures**: `TempDir::new().unwrap()` for isolated storage (used in 29 files)
 - **In-memory DB**: `Database::open_memory()` for fast SQLite tests
 - **No mocking framework** — tests use real implementations with temp directories
 - **Async tests**: `#[tokio::test]`
 - **Helper functions**: `make_file_meta()`, `mock_health()` — currently duplicated per module
 ---
 ## Golden Documents
 These are the authoritative references. All implementations must match them.
 | Document | Path | Role |
 |----------|------|------|
 | **Architecture** | `docs/v2/architecture.md` | System design — THE source of truth |
 | **Requirements** | `docs/v2/requirements.md` | What to build (FR-*, NFR-*) |
 | **Development Plan** | `docs/v2/development-plan.md` | How to build it (week-by-week) |
 | **Proto Definition** | `crates/musicfs-grpc/proto/musicfs.proto` | API contract |
 If code contradicts architecture.md, the architecture doc wins (unless explicitly superseded by a newer plan document).
 ---
 ## Documentation Rules
 ### Templates
 Two templates exist in `docs/templates/`:
 | Template | When to Use | Length | Review Level |
 |----------|-------------|--------|-------------|
 | **BlueDoc** | New systems, major architecture changes, new services | 5-20+ pages | Cross-functional |
 | **GreenDoc** | Bug fixes, small features, optimizations, config changes | 1-2 pages | Peer review |
 **Decision rule**: If any GreenDoc section needs more than 3 paragraphs, upgrade to a BlueDoc.
 ### When Neither Template Fits
 If the work doesn't fit BlueDoc or GreenDoc (e.g., research summaries, audit reports, testing strategies, runbooks):
 1. **Stop** — do not force-fit content into wrong template
 2. **Propose** a new template format to the user with: name, intended use case, suggested structure
 3. **Get approval** before writing the document
 4. Save approved template to `docs/templates/{name}.md` for future use
 ### Document Metadata
 Every document MUST have at the top:
 ```markdown
 **Date**: YYYY-MM-DD
 **Status**: [Draft / In-Review / Approved / Shipped / Obsolete]
 **Prerequisites**: [links to dependent docs]
 ```
 BlueDoc additionally requires: Authors, Reviewers, Approvers.
 ### Writing Conventions
 - **Tables**: Use for requirements mapping, deliverables tracking, comparisons
 - **Code blocks**: Include for implementation examples, config samples, commands
 - **Checklists**: `[ ]` for exit criteria and success metrics
 - **Section numbering**: Hierarchical (1., 1.1, 1.2)
 - **Cross-references**: Relative markdown links (`[architecture](../architecture.md)`)
 - **Requirement tracing**: Reference FR-X.Y / NFR-X.Y from requirements.md
 - **Diagrams**: PlantUML or Mermaid (architecture.md uses PlantUML)
 ### Post-Task Documentation Check (MANDATORY)
 After completing any non-trivial task, check whether documentation needs updating:
 1. **Did the architecture change?** (new component, changed data flow, new dependency) → Update `docs/v2/architecture.md`
 2. **Did requirements change?** (new constraint, relaxed target, dropped feature) → Update `docs/v2/requirements.md`
 3. **Did the API change?** (new RPC, changed message, removed endpoint) → Update `proto/musicfs.proto` + `docs/api/`
 4. **Did build/tooling change?** (new dependency, changed Nix flake, new cargo feature) → Update this `AGENTS.md`
 5. **Did a plan get completed or invalidated?** → Update the plan's **Status** field (Draft → Shipped / Obsolete)
 6. **Did the config format change?** → Update `dist/config.example.toml`
 If documentation is out of date, **fix it in the same commit** as the code change. Do not leave it for later.
 ### File Naming
 ```
 docs/v2/plans/week-NN-{feature}.md        # Weekly implementation plans
 docs/v2/plans/{feature}-{type}.md          # Feature plans, research, proposals
 docs/v2/{topic}.md                         # Top-level docs (architecture, requirements)
 docs/templates/{name}.md                   # Document templates
 ```
 ---
 ## Current State & Known Issues
 ### What's Implemented (Weeks 1-11)
 - FUSE filesystem with local origin
 - Metadata extraction (symphonia: FLAC, MP3, AAC, OGG, Opus)
 - Virtual tree with configurable path templates
 - CAS with CDC chunking and deduplication
 - Multi-origin federation with failover and health monitoring
 - NFS/SMB origin wrappers with retry logic
 - Full-text search (tantivy) with `.search/` virtual directory
 - Smart collections, artwork caching, predictive prefetch
 - Plugin system (native + WASM)
 - gRPC control API with event streaming
 - Comprehensive tracing/logging with journald integration
 ### Critical Open Issues
 Detailed in `docs/v2/plans/resilience-fault-tolerance.md` and `docs/v2/plans/persistent-state.md`:
 1. **No persistent state on mount** — every restart does full origin scan (O(N) instead of O(1)). SQLite, tantivy, and manifests persist on disk but are never loaded.
 2. **No signal handling** — SIGTERM kills the daemon instantly, no graceful shutdown
 3. **No crash recovery** — corrupted cache = crash on startup, no repair
 4. **FUSE↔tokio deadlock risk** — `block_on()` in sync FUSE callback can hang under load
 5. **Fire-and-forget tasks** — background tasks (health monitor, watcher, indexer) not supervised
 6. **RwLock poison** — single panic in a writer kills all FUSE operations
 ### S3/SFTP Origins
 `s3.rs` and `sftp.rs` are **feature-gated stubs** (not implemented). The `Origin` trait and failover infrastructure work, but only `local`, `nfs`, and `smb` origins have real implementations.
 ---
 ## Running the Filesystem
 ```bash
 # Development
 nix develop
 cargo build
 ./target/debug/musicfs mount /mnt/music --origin /path/to/music
 # Production (systemd)
 sudo cp dist/musicfs.service /etc/systemd/system/
 sudo systemctl enable --now musicfs
 # E2E tests (requires mounted filesystem)
 MUSICFS_TEST_MOUNT=/mnt/music cargo test --test e2e_players -- --ignored
 ```
 ---
 ## Key Dependencies
 | Crate | Version | Purpose |
 |-------|---------|---------|
 | `fuser` | 0.14 | FUSE interface |
 | `tokio` | 1.x | Async runtime (full features) |
 | `rusqlite` | 0.31 | SQLite (bundled) |
 | `sled` | 0.34 | Embedded KV (CAS chunk index) |
 | `tantivy` | 0.22 | Full-text search |
 | `symphonia` | 0.5 | Audio metadata extraction |
 | `fastcdc` | 3.x | Content-defined chunking |
 | `tonic` | 0.11 | gRPC server |
 | `tracing` | 0.1 | Structured logging |
 | `clap` | 4.x | CLI argument parsing |
 | `parking_lot` | 0.12 | Fast locks |
 | `dashmap` | 5.x | Concurrent HashMap |
@@ -1,674 +0,0 @@
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@@ -1,95 +1,19 @@
-[workspace]
+[package]
-resolver = "2"
+name = "musicfs"
 members = ["crates/*"]
 [workspace.package]
 version = "0.1.0"
-edition = "2021"
+edition = "2024"
 license = "MIT OR Apache-2.0"
 rust-version = "1.75"
 authors = ["MusicFS Contributors"]
 repository = "https://github.com/user/musicfs"
-[workspace.dependencies]
+[dependencies]
-# Async runtime
+clap = { version = "4.6.1", features = ["derive"] }
-tokio = { version = "1", features = ["full"] }
+ctrlc = "3.5.2"
-tokio-util = { version = "0.7", features = ["rt"] }
+fuser = "0.17.0"
-async-trait = "0.1"
+libc = "0.2.186"
-futures = "0.3"
+notify = "8.2.0"
-
+time = "0.3.49"
 # Error handling
 thiserror = "1"
 anyhow = "1"
 # Serialization
 serde = { version = "1", features = ["derive"] }
 serde_json = "1"
 rmp-serde = "1"
 toml = "0.8"
 # Concurrent collections
 dashmap = "5"
 # Logging
 tracing = "0.1"
 tracing-subscriber = { version = "0.3", features = ["env-filter", "json"] }
 tracing-appender = "0.2"
 tracing-journald = "0.3"
 # FUSE
 fuser = "0.14"
 # Database
 rusqlite = { version = "0.31", features = ["bundled"] }
 sled = "0.34"
 # Hashing (per architecture 8.3)
 xxhash-rust = { version = "0.8", features = ["xxh64"] }
 hex = "0.4"
 # Audio metadata
 symphonia = { version = "0.5", default-features = false, features = [
    "aac", "alac", "flac", "mp3", "ogg", "vorbis", "wav"
 ] }
 twox-hash = "2.1.2"
-# Bytes handling
+sea-orm = { version = "2.0.0-rc", features = [ "sqlx-postgres", "runtime-tokio", "macros" ] }
-bytes = "1"
+tokio = { version = "1", features = ["macros", "rt-multi-thread"] }
 # Platform directories
 dirs = "5"
 # CLI
 clap = { version = "4", features = ["derive"] }
 # Testing
 tempfile = "3"
 fail = "0.5"
 rlimit = "0.10"
 nix = { version = "0.29", features = ["signal", "process"] }
 wiremock = "0.6"
 assert_cmd = "2.0"
 noxious-client = "1.0"
 # Platform-specific
 libc = "0.2"
 # Search (Week 8)
 tantivy = "0.22"
 moka = { version = "0.12", features = ["sync"] }
 # Concurrency
 parking_lot = "0.12"
 # gRPC (Week 8)
 tonic = "0.11"
 prost = "0.12"
 tokio-stream = "0.1"
 # Smart Features (Week 9)
 image = { version = "0.24", default-features = false, features = ["jpeg", "png"] }
 chrono = "0.4"
 sd-notify = "0.4"
 [workspace.dependencies.tonic-build]
 version = "0.11"
@@ -1,879 +0,0 @@
 # MusicFS
 > A read-only FUSE filesystem that presents your music library organized by metadata — artist, album, track — regardless of how files are stored on disk.
 Browse `/Artist/Album/Track.flac` in any media player or file manager. Original files are never touched.
 ---
 ## What It Does
 MusicFS mounts as a virtual filesystem. Point it at your music storage (local drive, NFS share, S3 bucket, SFTP server) and it exposes a clean metadata-based directory tree:
 ```
 /mnt/music/
 ├── Metallica/
 │   └── 72 Seasons (2023) [FLAC]/
 │       ├── 01 - 72 Seasons.flac
 │       ├── 02 - Shadows Follow.flac
 │       └── cover.jpg
 ├── Pink Floyd/
 │   └── The Wall (1979) [FLAC]/
 │       ├── 01 - In the Flesh?.flac
 │       └── ...
 └── .search/
    └── (full-text search — see Search section)
 ```
 Files are read directly from origin storage with local chunk caching. Once cached, playback works entirely offline. Write operations return `EROFS` — origin files are always safe.
 ---
 ## Features
 | Feature | Details |
 |---------|---------|
 | **Instant mount** | O(1) regardless of library size (<500ms) |
 | **Metadata-organized paths** | Configurable path templates via `$artist`, `$album`, `$year`, etc. |
 | **Multi-origin federation** | Local, NFS, SMB, S3, SFTP — automatic failover by priority |
 | **Content-addressable cache** | Chunk-level deduplication, LRU eviction, delta sync (>90% bandwidth savings) |
 | **Full-text search** | `/.search/metallica/` returns instant results across 1M+ tracks |
 | **Metadata overlay** | Set/override tags in the virtual layer without modifying originals |
 | **Album art** | Virtual `cover.jpg` per album, extracted from embedded tags |
 | **Plugin system** | Native `.so` and WASM plugins for custom origins, formats, metadata sources |
 | **gRPC control API** | Cache stats, origin health, live event streaming, metadata management |
 | **systemd integration** | `sd_notify` ready, journald logging, clean SIGTERM handling |
 **Supported formats:** FLAC, MP3, OGG, WAV, M4A, AAC, Opus
 ---
 ## Quick Start
 ```bash
 # 1. Enter dev environment (provides Rust, FUSE3, SQLite, everything)
 nix develop
 # 2. Build
 cargo build
 # 3. Mount your music library
 ./target/debug/musicfs mount /mnt/music --origin /path/to/your/music
 # 4. Browse
 ls /mnt/music
 mpv /mnt/music/Artist/Album/01\ -\ Track.flac
 # 5. Unmount
 fusermount -u /mnt/music
 ```
 No `rustup`, no `apt install`. The Nix flake provides the full toolchain.
 ---
 ## Installation
 ### From Nix (recommended)
 ```bash
 # Development shell — everything you need
 nix develop
 # Or install the binary into your profile
 nix profile install .#musicfs
 ```
 ### From Source
 **Prerequisites (non-Nix):**
 - Rust 1.75+
 - `libfuse3-dev` / `fuse3` (package name varies by distro)
 - `libsqlite3-dev`
 - `libssl-dev`
 - `protobuf-compiler` (for gRPC)
 - `clang` + `lld`
 ```bash
 git clone https://github.com/user/musicfs
 cd musicfs/musicfs
 cargo build --release
 sudo cp target/release/musicfs /usr/local/bin/
 ```
 ### System Requirements
 | Resource | Minimum | Recommended |
 |----------|---------|-------------|
 | CPU | 1 core | 4 cores |
 | RAM | 256 MB | 2 GB |
 | Disk (cache) | 1 GB | 50 GB |
 | Linux kernel | 4.x+ | 5.x+ |
 | FUSE module | required | — |
 ---
 ## Configuration
 MusicFS can be configured via file (`--config`), CLI flags, or environment variables (`RUST_LOG` for log level).
 ### Minimal Config
 ```toml
 mount_point = "/mnt/music"
 cache_dir   = "/home/user/.cache/musicfs"
 [[origins]]
 id          = "local"
 origin_type = "local"
 priority    = 1
 path        = "/mnt/nas/music"
 ```
 ```bash
 musicfs mount --config /etc/musicfs/config.toml
 ```
 ### Full Config Reference
 <!-- embedme config.example.toml -->
 ```toml
 # MusicFS Configuration
 # Copy to /etc/musicfs/config.toml or ~/.config/musicfs/config.toml
 # Required: where to mount the virtual filesystem
 mount_point = "/mnt/music"
 # Required: directory for cache data (CAS chunks, metadata, search index)
 cache_dir = "/var/cache/musicfs"
 # ------------------------------------------------------------------------------
 # Origins - music sources (at least one required)
 # Supported types: local, nfs, smb, s3, sftp
 # Lower priority number = preferred source for failover
 # ------------------------------------------------------------------------------
 [[origins]]
 id = "local-music"
 origin_type = "local"
 priority = 1
 enabled = true
 path = "/home/user/Music"
 [[origins]]
 id = "nas-nfs"
 origin_type = "nfs"
 priority = 2
 enabled = true
 path = "/mnt/nas/music"
 [[origins]]
 id = "nas-smb"
 origin_type = "smb"
 priority = 3
 enabled = false
 path = "/mnt/smb/music"
 [[origins]]
 id = "cloud-backup"
 origin_type = "s3"
 priority = 10
 enabled = false
 bucket = "my-music-backup"
 region = "us-east-1"
 [[origins]]
 id = "remote-server"
 origin_type = "sftp"
 priority = 10
 enabled = false
 host = "music.example.com"
 port = 22
 user = "musicfs"
 path = "/srv/music"
 # ------------------------------------------------------------------------------
 # Cache settings
 # ------------------------------------------------------------------------------
 [cache]
 # In-memory metadata cache size (artist/album/track info)
 metadata_cache_mb = 100
 # On-disk content cache size (audio chunks)
 content_cache_gb = 10
 # ------------------------------------------------------------------------------
 # Health monitoring for origin failover
 # ------------------------------------------------------------------------------
 [health]
 # How often to check origin health
 check_interval_secs = 30
 # Timeout for health check probes
 timeout_ms = 5000
 # Consecutive failures before marking origin unhealthy
 unhealthy_threshold = 3
 # Per-origin type thresholds (overrides unhealthy_threshold)
 [health.per_origin_thresholds]
 local = 1
 nfs = 3
 smb = 3
 s3 = 3
 sftp = 3
 # ------------------------------------------------------------------------------
 # Logging
 # ------------------------------------------------------------------------------
 [logging]
 # Directory for log files
 log_dir = "/var/log/musicfs"
 # Output logs as JSON (for log aggregators)
 json_output = false
 # Send logs to systemd journal
 journald = true
 # Log level filter (tracing format)
 # Examples: "info", "debug", "musicfs=debug,warn", "musicfs_fuse=trace"
 level = "musicfs=info,warn"
 # Trace sampling rate for performance tracing (0.0 to 1.0)
 trace_sample_rate = 1.0
 ```
 ### Cache Layout on Disk
 ```
 ~/.cache/musicfs/
 ├── musicfs.db       # SQLite: file metadata, virtual tree, overlay data
 ├── musicfs.lock     # Single-instance lock
 ├── musicfs.pid      # Daemon PID
 ├── chunks/          # Content-addressable chunk files
 │   ├── aa/          # 256 subdirs (first 2 hex chars of hash)
 │   │   └── aa1b2c…  # 64 KB average chunk
 │   └── ...
 ├── search.idx/      # Tantivy full-text search index
 └── chunks.sled/     # Sled KV: content hash → chunk location
 ```
 ---
 ## CLI Reference
 ```
 musicfs [OPTIONS] <COMMAND>
 OPTIONS:
  -l, --log-level <LEVEL>   Log verbosity [default: info]
 ```
 ### `mount` — Start the filesystem
 ```bash
 # From CLI flags (quick start)
 musicfs mount /mnt/music --origin /path/to/music
 # From config file
 musicfs mount --config /etc/musicfs/config.toml
 # All flags
 musicfs mount [MOUNTPOINT] \
  --config <path>         # Config file (overrides flags)
  --origin <path>         # Source music directory
  --cache-dir <path>      # Cache location [default: ~/.cache/musicfs]
  --grpc-port <port>      # gRPC server port [default: 50052]
 ```
 ### `status` — Daemon status
 ```bash
 musicfs status
 ```
 ### `cache` — Cache management
 ```bash
 musicfs cache stats                    # Hit rate, size, dedup ratio
 musicfs cache clear                    # Clear all caches
 musicfs cache clear <origin-id>        # Clear cache for one origin
 musicfs cache prefetch <path> [path…]  # Pre-warm cache for paths
 ```
 ### `search` — Full-text search
 ```bash
 musicfs search "metallica"             # Search across all metadata
 musicfs search "dark side" --limit 20  # Limit results [default: 100]
 ```
 Search results are also browsable as a virtual directory (see [Search](#search)).
 ### `origin` — Origin management
 ```bash
 musicfs origin list                    # List all configured origins
 musicfs origin health <id>             # Check health of one origin
 musicfs origin rescan <id>             # Force re-scan and re-index
 ```
 ### `metadata` — Metadata overlay
 ```bash
 # Requires running daemon
 musicfs metadata get "/Artist/Album/01 - Track.flac"
 musicfs metadata get "/Artist/Album/01 - Track.flac" --field artist
 musicfs metadata set "/Artist/Album/01 - Track.flac" \
  --title "New Title" \
  --artist "New Artist" \
  --album "New Album" \
  --track 1 \
  --genre "Rock" \
  --date "2023"
 # Set from JSON
 musicfs metadata set "/path/to/file.flac" --json '{"title":"foo","year":2023}'
 # Show current (overlaid) metadata
 musicfs metadata diff "/path/to/file.flac"
 # Revert overlay — restore original metadata
 musicfs metadata clear "/path/to/file.flac"
 # Bulk import/export
 musicfs metadata import library.csv
 musicfs metadata import library.json
 musicfs metadata export --output library.json
 musicfs metadata export --output library.csv --query "artist:Metallica"
 ```
 > **Note:** `--endpoint` flag (default `http://[::1]:50051`) selects the gRPC server.
 ### `trash` — Deleted file recovery
 When files disappear from the origin, MusicFS moves them to a virtual trash rather than removing them immediately.
 ```bash
 musicfs trash list --config /etc/musicfs/config.toml
 musicfs trash list --since 7d              # Deleted in last 7 days
 musicfs trash list --origin local          # Filter by origin
 musicfs trash list --path "/Metallica"     # Filter by path prefix
 musicfs trash restore "/Metallica/72 Seasons"  # Restore folder
 musicfs trash restore --all                    # Restore everything
 musicfs trash empty --older-than 30d       # Permanently delete old entries
 musicfs trash empty --pattern "/Unknown*"  # Delete by pattern
 ```
 ### `events` — Live event stream
 ```bash
 musicfs events                         # All events
 musicfs events --type file_added       # Filter by type
 # Event types: file_added, file_removed, file_modified,
 #              origin_connected, origin_disconnected,
 #              sync_started, sync_completed, cache_eviction
 ```
 ### `shutdown` — Stop the daemon
 ```bash
 musicfs shutdown                       # Graceful (drain in-flight ops)
 musicfs shutdown --graceful false      # Immediate
 musicfs shutdown --timeout 60          # Max drain timeout seconds
 ```
 ---
 ## Storage Origins
 ### Local Filesystem
 ```toml
 [[origins]]
 id          = "local"
 origin_type = "local"
 priority    = 1
 path        = "/mnt/nas/music"
 ```
 Changes detected via `inotify`. Zero-latency access.
 ### NFS
 ```toml
 [[origins]]
 id          = "nfs"
 origin_type = "nfs"
 priority    = 2
 host        = "nas.local"
 export      = "/exports/music"
 ```
 ### SMB / CIFS
 ```toml
 [[origins]]
 id          = "smb"
 origin_type = "smb"
 priority    = 3
 host        = "nas.local"
 share       = "music"
 ```
 ### S3 (stub — not yet functional)
 ```toml
 [[origins]]
 id          = "s3"
 origin_type = "s3"
 priority    = 4
 bucket      = "my-music"
 region      = "us-east-1"
 # Credentials via AWS_ACCESS_KEY_ID / AWS_SECRET_ACCESS_KEY env vars
 ```
 ### SFTP (stub — not yet functional)
 ```toml
 [[origins]]
 id          = "sftp"
 origin_type = "sftp"
 priority    = 4
 host        = "server.example.com"
 port        = 22
 username    = "alice"
 # Auth via SSH agent or key file — never store passwords in config
 ```
 ### Multi-Origin Failover
 Multiple origins are federates into a single virtual tree. MusicFS selects origins by priority, falling back automatically when one becomes unhealthy. Health is polled every `check_interval_secs` (default: 30s). When all origins for a file are unavailable, cached data is served seamlessly.
 ---
 ## Virtual Filesystem Layout
 ### Path Templates
 The virtual path for each file is built from its audio metadata using a configurable template. Variables are sanitized (no `/`, `\`, `:`).
 **Default template:**
 ```
 $artist/$album ($year) [$format_upper]/$track - $title.$format
 ```
 **Template variables:**
 | Variable | Description | Example |
 |----------|-------------|---------|
 | `$artist` | Track artist | `Metallica` |
 | `$album` | Album name | `72 Seasons` |
 | `$title` | Track title | `Lux Æterna` |
 | `$track` | Track number (zero-padded) | `03` |
 | `$disc` | Disc number | `1` |
 | `$year` | Release year | `2023` |
 | `$genre` | Genre | `Metal` |
 | `$format` | File extension (lowercase) | `flac` |
 | `$format_upper` | File extension (uppercase) | `FLAC` |
 Files with missing metadata fall back to `Unknown Artist/Unknown Album/filename`.
 ### Album Art
 Each album directory includes a virtual `cover.jpg` extracted from the embedded tags of the first track. No files are written to disk by MusicFS — the image is synthesized on read.
 ### Search
 The `/.search/` virtual directory exposes full-text search as filesystem paths:
 ```bash
 # Search via filesystem — use the query as a directory name
 ls "/mnt/music/.search/dark side of the moon/"
 # → Returns matching tracks as symlinks to their virtual paths
 # Or use the CLI
 musicfs search "dark side of the moon"
 musicfs search "artist:Metallica" --limit 50
 ```
 **Query syntax** (powered by [tantivy](https://github.com/quickwit-oss/tantivy)):
 | Syntax | Example | Matches |
 |--------|---------|---------|
 | Simple terms | `metallica sandman` | All fields contain both words |
 | Field-specific | `artist:Metallica` | Artist field only |
 | Phrase | `album:"Master of Puppets"` | Exact phrase in album |
 | Fuzzy | `metalica~1` | Within Levenshtein distance 1 |
 | Range | `year:[1980 TO 1989]` | Numeric range |
 | Boolean | `genre:Metal AND year:[1980 TO 1989]` | Combined conditions |
 Indexed fields: `title`, `artist`, `album`, `album_artist`, `genre`, `composer`, `year`.
 Results cached for 5 minutes. Max 1000 results per query. Queries capped at 256 characters.
 ### Smart Collections
 Built-in and custom query-based virtual folders appear alongside regular directories:
 - **Recently Added** — tracks added in the last 30 days
 - **80s Music** — year 1980–1989
 - **90s Music** — year 1990–1999
 Custom collections can be defined via the gRPC API with compound boolean queries over any indexed field.
 ---
 ## Metadata Overlay
 MusicFS lets you override metadata in the virtual layer **without touching origin files**. Overlaid metadata is synthesized into the audio file header on read — players see your corrected tags, the origin file is unchanged.
 ```bash
 # Fix a misnamed artist
 musicfs metadata set "/Unknown/Best Of/01 - Track.flac" \
  --artist "The Beatles" \
  --album "Past Masters"
 # Verify
 musicfs metadata get "/The Beatles/Past Masters/01 - Track.flac"
 # See what's been overlaid vs. original
 musicfs metadata diff "/The Beatles/Past Masters/01 - Track.flac"
 # Revert
 musicfs metadata clear "/The Beatles/Past Masters/01 - Track.flac"
 ```
 Supported fields: `title`, `artist`, `album`, `album-artist`, `track`, `disc`, `genre`, `date`, `composer`, `comment`, `lyrics`, `copyright`, `compilation`, sort fields (`artist-sort`, etc.), MusicBrainz IDs, ReplayGain values, and arbitrary custom tags.
 ---
 ## Plugin Development
 Plugins extend MusicFS without modifying core code. Three plugin types:
 | Type | Purpose | Examples |
 |------|---------|---------|
 | **Origin** | Custom storage backends | Google Drive, Dropbox, custom NAS protocol |
 | **Metadata** | External tag enrichment | MusicBrainz, Discogs, Last.fm |
 | **Format** | Custom audio formats | Game audio, proprietary codecs |
 ### Native Plugin (`.so`)
 ```rust
 // Cargo.toml
 [lib]
 crate-type = ["cdylib"]
 [dependencies]
 musicfs-plugins = { path = "..." }
 semver = "1"
 serde_json = "1"
 ```
 ```rust
 use musicfs_plugins::{declare_plugin, Plugin, PluginType, FormatPlugin};
 use musicfs_core::AudioMeta;
 use semver::Version;
 use serde_json::Value;
 struct MyFormatPlugin;
 impl Plugin for MyFormatPlugin {
    fn name(&self) -> &str { "my-format" }
    fn version(&self) -> Version { Version::new(1, 0, 0) }
    fn plugin_type(&self) -> PluginType { PluginType::Format }
    fn init(&mut self, _config: Value) -> musicfs_plugins::Result<()> { Ok(()) }
    fn shutdown(&mut self) -> musicfs_plugins::Result<()> { Ok(()) }
 }
 impl FormatPlugin for MyFormatPlugin {
    fn extensions(&self) -> &[&str] { &["xyz"] }
    fn parse(&self, reader: &mut dyn std::io::Read) -> musicfs_plugins::Result<AudioMeta> {
        // Parse your format and return metadata
        todo!()
    }
    fn synthesize_header(&self, metadata: &AudioMeta) -> musicfs_plugins::Result<Vec<u8>> {
        // Build a new file header with updated metadata
        todo!()
    }
 }
 // Required export — MusicFS calls this to instantiate the plugin
 declare_plugin!(MyFormatPlugin, MyFormatPlugin);
 ```
 ```bash
 cargo build --release
 # produces target/release/libmy_format_plugin.so
 ```
 ### Loading Plugins
 ```toml
 [plugins]
 enabled = true
 search_paths = ["/usr/lib/musicfs/plugins"]  # Auto-discover .so files here
 [plugins.plugins.my-format]
 path    = "/path/to/libmy_format_plugin.so"
 enabled = true
 config  = { key = "value" }  # Passed to Plugin::init()
 ```
 ### WASM Plugins (experimental)
 ```toml
 [plugins.wasm]
 enabled       = true
 max_memory_mb = 64
 max_cpu_time_ms = 5000
 ```
 Load a `.wasm` binary at runtime via the gRPC API or by placing it in a search path. WASM plugins run sandboxed inside [wasmtime](https://wasmtime.dev/).
 ### Plugin API Version
 Current: `0.1.0`. Breaking changes will increment the major version. MusicFS checks `musicfs_plugin_api_version()` before loading any native plugin.
 ---
 ## Control API (gRPC)
 MusicFS exposes a gRPC API for programmatic control. The server starts automatically with the daemon.
 **Default port:** `50052` (override with `--grpc-port`)
 **Proto definition:** `crates/musicfs-grpc/proto/musicfs.proto`
 ### Available RPCs
 ```
 MusicFS service:
  GetStatus          → daemon version, uptime, mount state, open handles
  Shutdown           → graceful or forced stop
  GetCacheStats      → hit rate, chunk count, dedup ratio, per-tier breakdown
  ClearCache         → clear all or per-origin, per-tier, dry-run supported
  Prefetch           → pre-warm cache for paths or search queries
  ListOrigins        → all configured origins with file count and health
  GetOriginHealth    → health status and latency for one origin
  RescanOrigin       → force re-scan with streaming progress
  Search             → full-text search (paginated or streaming)
  SubscribeEvents    → server-streaming live event feed
 MetadataService:
  GetMetadata        → all tags for a virtual path
  UpdateMetadata     → set overlay tags for a file
  ClearOverlay       → revert to original metadata
  ImportMetadata     → bulk import from CSV/JSON (streaming progress)
 ```
 ### Query with `grpcurl`
 ```bash
 # Daemon status
 grpcurl -plaintext localhost:50052 musicfs.v1.MusicFS/GetStatus
 # Search
 grpcurl -plaintext -d '{"query": "metallica", "limit": 10}' \
  localhost:50052 musicfs.v1.MusicFS/Search
 # Cache stats
 grpcurl -plaintext localhost:50052 musicfs.v1.MusicFS/GetCacheStats
 # List origins
 grpcurl -plaintext localhost:50052 musicfs.v1.MusicFS/ListOrigins
 # Trigger rescan with live progress
 grpcurl -plaintext -d '{"origin_id": "local"}' \
  localhost:50052 musicfs.v1.MusicFS/RescanOrigin
 # Live event stream
 grpcurl -plaintext localhost:50052 musicfs.v1.MusicFS/SubscribeEvents
 ```
 ---
 ## Production Deployment
 ### systemd
 ```bash
 sudo cp dist/musicfs.service /etc/systemd/system/
 # Edit the service to match your paths:
 # ExecStart=/usr/bin/musicfs mount --config /etc/musicfs/config.toml
 sudo systemctl enable --now musicfs
 sudo systemctl status musicfs
 ```
 <!-- embedme dist/musicfs.service -->
 ```ini
 [Unit]
 Description=MusicFS - Virtual FUSE Filesystem for Music
 After=network.target
 [Service]
 ExecStart=/usr/bin/musicfs mount /mnt/music --origin /path/to/music
 ExecStopPost=/usr/bin/fusermount -u /mnt/music
 Restart=on-failure
 [Install]
 WantedBy=multi-user.target
 ```
 MusicFS sends `sd_notify(READY)` when the mount is live and `sd_notify(STOPPING)` during shutdown. Use `Type=notify` for precise readiness tracking.
 ### Signals
 | Signal | Behavior |
 |--------|---------|
 | `SIGTERM` | Graceful shutdown — drains in-flight ops, unmounts |
 | `SIGINT` | Graceful shutdown (same) |
 | `SIGHUP` | Process pending file restores from trash |
 ### Security Notes
 - Run as an **unprivileged user** — no root required.
 - Store remote credentials in the **system keyring** or environment variables. Never put them in the config file.
 - Credentials are redacted from logs and `RUST_LOG` output.
 - WASM plugins run sandboxed. Native `.so` plugins have full process access — only load plugins you trust.
 ---
 ## Observability
 ### Logs
 ```bash
 # Set level at startup
 musicfs mount ... --log-level debug
 # or via env
 RUST_LOG=musicfs=debug,warn musicfs mount ...
 ```
 | Level | Content |
 |-------|---------|
 | `error` | Unrecoverable failures, data corruption |
 | `warn` | Recoverable failures, origin timeouts, skipped files |
 | `info` | Mount/unmount, sync completion, config reload |
 | `debug` | Cache hits/misses, origin selection, file scans |
 | `trace` | Individual FUSE operations, chunk I/O |
 Log files rotate daily in `log_dir` (default: `/var/log/musicfs/`). Structured JSON available with `json_output = true`. On Linux, logs forward to journald by default (`journald = true`).
 ### Prometheus Metrics
 Metrics are exposed in Prometheus format via the gRPC API:
 ```
 musicfs_fuse_ops_total{op="read"}           152341
 musicfs_fuse_ops_total{op="readdir"}        8234
 musicfs_fuse_latency_seconds{op="read",quantile="0.99"}  0.004
 musicfs_cache_hits_total                    142107
 musicfs_cache_misses_total                  10234
 musicfs_cache_size_bytes                    5368709120
 musicfs_origin_health{origin="local"}       1
 musicfs_origin_health{origin="s3"}          0
 musicfs_sync_files_changed{origin="local"}  15
 ```
 ---
 ## Performance
 | Operation | Target | Maximum |
 |-----------|--------|---------|
 | Mount (any library size) | <100ms | 500ms |
 | `stat()` cached | <1ms | 5ms |
 | `readdir()` cached | <10ms | 50ms |
 | `open()` cached | <5ms | 20ms |
 | `read()` cached | <1ms | 5ms |
 | `read()` cache miss, local | <50ms | 200ms |
 | `read()` cache miss, remote | <200ms | 1000ms |
 | Search (1M tracks) | <500ms | 1000ms |
 | Sequential read (cached) | >500 MB/s | — |
 | Metadata ops | >1000 ops/s | — |
 Memory: <50 MB idle, <200 MB with 1K files active, <500 MB peak.
 Scales to 10M+ files with O(1) mount and O(log n) lookups.
 ---
 ## Known Limitations
 These are tracked issues — see `docs/v2/plans/` for details.
 | Issue | Impact | Workaround |
 |-------|--------|-----------|
 | **No persistent state on mount** | Every restart does a full origin scan (O(N)). SQLite/search index persist but are not loaded on startup. | — |
 | **S3 and SFTP origins are stubs** | Only `local`, `nfs`, and `smb` have real implementations. | Use NFS/SMB mount as proxy for remote storage. |
 | **No write-through for metadata** | Overlaid metadata exists only in MusicFS's database, not in the actual audio files. | Use a tagger (beets, mp3tag) to write back if needed. |
 | **FUSE↔tokio deadlock risk** | `block_on()` in sync FUSE callbacks can stall under heavy concurrent load. | Keep concurrent open handles below ~500. |
 | **No background task supervision** | Health monitor, watcher, and indexer are fire-and-forget. A crash silently stops background work. | Restart the daemon periodically in critical deployments. |
 ---
 ## Architecture
 MusicFS is a workspace of 11 Rust crates:
 ```
 musicfs-cli       → binary, CLI parsing, startup wiring
 musicfs-fuse      → FUSE operations (fuser), virtual tree serving
 musicfs-core      → shared types, config, events, errors
 musicfs-cache     → SQLite metadata DB, virtual tree, format handlers
 musicfs-cas       → content-addressable chunk store (sled + xxHash64)
 musicfs-origins   → origin backends (local, NFS, SMB, S3 stub, SFTP stub)
 musicfs-metadata  → audio tag extraction (symphonia)
 musicfs-sync      → delta sync, CDC chunking (FastCDC), inotify watcher
 musicfs-search    → full-text index (tantivy), .search/ virtual dir
 musicfs-grpc      → gRPC server (tonic + prost), proto codegen
 musicfs-plugins   → plugin host, native .so loader, WASM sandbox
 ```
 Data flow on a cache miss: `FUSE read()` → `VirtualPathResolver` → `CAS` (chunk lookup) → `OriginFederation` (fetch missing range) → CDC chunk → store → return.
 Full design: [`docs/v2/architecture.md`](docs/v2/architecture.md)
 Requirements: [`docs/v2/requirements.md`](docs/v2/requirements.md)
 Roadmap: [`docs/v2/development-plan.md`](docs/v2/development-plan.md)
 ---
 ## Development
 ```bash
 nix develop                    # Enter dev shell
 cargo check                    # Fast compile check
 cargo test                     # All 162 tests
 cargo test -p musicfs-core     # Single crate
 cargo clippy                   # Lint
 cargo fmt                      # Format
 cargo nextest run               # Parallel test runner (faster)
 cargo watch -x check -x test   # Watch mode
 # Cargo aliases
 cargo t   # test
 cargo c   # check
 cargo b   # build
 # gRPC codegen (runs via build.rs automatically)
 cargo build -p musicfs-grpc
 ```
 Pre-commit hooks (rustfmt + clippy) are installed automatically in the Nix dev shell.
 ---
 ## License
 MIT OR Apache-2.0 — see [LICENSE-MIT](LICENSE-MIT) and [LICENSE-APACHE](LICENSE-APACHE).
@@ -1,75 +0,0 @@
 {
  "timestamp": "2026-05-12T14:42:37.343765", 
  "results": [
    {
      "mean_ms": null, 
      "runs": 0, 
      "name": "mount_time", 
      "memory_kb": null, 
      "error": "Mount process died: Traceback (most recent call last):\n  File \"/tmp/nix-shell.VlFHpy/nix-shell.rhvctI/beetfs_bench_JfIl36/mount.py\", line 40, in <module>\n    beetFs.directory_structure.adddir(sub_elements, level_subbed[level])\n  File \"/home/fujin/Code/agregators/music-agregator/beetfs/beetsplug/beetFs.py\", line 414, in adddir\n    node = self.getnode(elements, root=root)\n  File \"/home/fujin/Code/agregators/music-agregator/beetfs/beetsplug/beetFs.py\", line 403, in getnode\n    return self.getnode(elements, root=root.dirs[topdir])\nKeyError: u'Bench Artist'\n", 
      "min_ms": null, 
      "metadata": {}, 
      "max_ms": null
    }, 
    {
      "mean_ms": null, 
      "runs": 0, 
      "name": "readdir", 
      "memory_kb": null, 
      "error": "Mount process died: Traceback (most recent call last):\n  File \"/tmp/nix-shell.VlFHpy/nix-shell.rhvctI/beetfs_bench_JfIl36/mount.py\", line 40, in <module>\n    beetFs.directory_structure.adddir(sub_elements, level_subbed[level])\n  File \"/home/fujin/Code/agregators/music-agregator/beetfs/beetsplug/beetFs.py\", line 414, in adddir\n    node = self.getnode(elements, root=root)\n  File \"/home/fujin/Code/agregators/music-agregator/beetfs/beetsplug/beetFs.py\", line 403, in getnode\n    return self.getnode(elements, root=root.dirs[topdir])\nKeyError: u'Bench Artist'\n", 
      "min_ms": null, 
      "metadata": {}, 
      "max_ms": null
    }, 
    {
      "mean_ms": null, 
      "runs": 0, 
      "name": "stat_latency", 
      "memory_kb": null, 
      "error": "Mount process died: Traceback (most recent call last):\n  File \"/tmp/nix-shell.VlFHpy/nix-shell.rhvctI/beetfs_bench_JfIl36/mount.py\", line 40, in <module>\n    beetFs.directory_structure.adddir(sub_elements, level_subbed[level])\n  File \"/home/fujin/Code/agregators/music-agregator/beetfs/beetsplug/beetFs.py\", line 414, in adddir\n    node = self.getnode(elements, root=root)\n  File \"/home/fujin/Code/agregators/music-agregator/beetfs/beetsplug/beetFs.py\", line 403, in getnode\n    return self.getnode(elements, root=root.dirs[topdir])\nKeyError: u'Bench Artist'\n", 
      "min_ms": null, 
      "metadata": {}, 
      "max_ms": null
    }, 
    {
      "mean_ms": null, 
      "runs": 0, 
      "name": "enoent_lookup", 
      "memory_kb": null, 
      "error": "Mount process died: Traceback (most recent call last):\n  File \"/tmp/nix-shell.VlFHpy/nix-shell.rhvctI/beetfs_bench_JfIl36/mount.py\", line 40, in <module>\n    beetFs.directory_structure.adddir(sub_elements, level_subbed[level])\n  File \"/home/fujin/Code/agregators/music-agregator/beetfs/beetsplug/beetFs.py\", line 414, in adddir\n    node = self.getnode(elements, root=root)\n  File \"/home/fujin/Code/agregators/music-agregator/beetfs/beetsplug/beetFs.py\", line 403, in getnode\n    return self.getnode(elements, root=root.dirs[topdir])\nKeyError: u'Bench Artist'\n", 
      "min_ms": null, 
      "metadata": {}, 
      "max_ms": null
    }, 
    {
      "mean_ms": null, 
      "runs": 0, 
      "name": "file_open", 
      "memory_kb": null, 
      "error": "Mount process died: Traceback (most recent call last):\n  File \"/tmp/nix-shell.VlFHpy/nix-shell.rhvctI/beetfs_bench_JfIl36/mount.py\", line 40, in <module>\n    beetFs.directory_structure.adddir(sub_elements, level_subbed[level])\n  File \"/home/fujin/Code/agregators/music-agregator/beetfs/beetsplug/beetFs.py\", line 414, in adddir\n    node = self.getnode(elements, root=root)\n  File \"/home/fujin/Code/agregators/music-agregator/beetfs/beetsplug/beetFs.py\", line 403, in getnode\n    return self.getnode(elements, root=root.dirs[topdir])\nKeyError: u'Bench Artist'\n", 
      "min_ms": null, 
      "metadata": {}, 
      "max_ms": null
    }, 
    {
      "mean_ms": null, 
      "runs": 0, 
      "name": "read_throughput", 
      "memory_kb": null, 
      "error": "Mount process died: Traceback (most recent call last):\n  File \"/tmp/nix-shell.VlFHpy/nix-shell.rhvctI/beetfs_bench_JfIl36/mount.py\", line 40, in <module>\n    beetFs.directory_structure.adddir(sub_elements, level_subbed[level])\n  File \"/home/fujin/Code/agregators/music-agregator/beetfs/beetsplug/beetFs.py\", line 414, in adddir\n    node = self.getnode(elements, root=root)\n  File \"/home/fujin/Code/agregators/music-agregator/beetfs/beetsplug/beetFs.py\", line 403, in getnode\n    return self.getnode(elements, root=root.dirs[topdir])\nKeyError: u'Bench Artist'\n", 
      "min_ms": null, 
      "metadata": {}, 
      "max_ms": null
    }, 
    {
      "mean_ms": null, 
      "runs": 0, 
      "name": "memory_usage", 
      "memory_kb": null, 
      "error": "Mount process died: Traceback (most recent call last):\n  File \"/tmp/nix-shell.VlFHpy/nix-shell.rhvctI/beetfs_bench_JfIl36/mount.py\", line 40, in <module>\n    beetFs.directory_structure.adddir(sub_elements, level_subbed[level])\n  File \"/home/fujin/Code/agregators/music-agregator/beetfs/beetsplug/beetFs.py\", line 414, in adddir\n    node = self.getnode(elements, root=root)\n  File \"/home/fujin/Code/agregators/music-agregator/beetfs/beetsplug/beetFs.py\", line 403, in getnode\n    return self.getnode(elements, root=root.dirs[topdir])\nKeyError: u'Bench Artist'\n", 
      "min_ms": null, 
      "metadata": {}, 
      "max_ms": null
    }
  ]
 }
@@ -1,624 +0,0 @@
 #!/usr/bin/env python
 # -*- coding: utf-8 -*-
 """
 beetfs Benchmark Suite
 Measures mount time, metadata ops, file I/O, and memory usage.
 """
 from __future__ import print_function
 import os
 import sys
 import time
 import json
 import tempfile
 import shutil
 import subprocess
 import signal
 import resource
 import datetime
 # Add project paths
 sys.path.insert(0, os.path.dirname(os.path.dirname(os.path.abspath(__file__))))
 sys.path.insert(0, os.path.join(os.path.dirname(os.path.dirname(os.path.abspath(__file__))), 'beetsplug'))
 sys.path.insert(0, os.path.join(os.path.dirname(os.path.dirname(os.path.abspath(__file__))), 'tests'))
 from conftest import create_synthetic_flac
 class BenchmarkResult(object):
    """Stores benchmark results."""
    def __init__(self, name):
        self.name = name
        self.timings = []
        self.memory_kb = None
        self.error = None
        self.metadata = {}
    def add_timing(self, seconds):
        self.timings.append(seconds)
    @property
    def mean(self):
        if not self.timings:
            return None
        return sum(self.timings) / len(self.timings)
    @property
    def min_time(self):
        return min(self.timings) if self.timings else None
    @property
    def max_time(self):
        return max(self.timings) if self.timings else None
    def to_dict(self):
        return {
            'name': self.name,
            'mean_ms': self.mean * 1000 if self.mean else None,
            'min_ms': self.min_time * 1000 if self.min_time else None,
            'max_ms': self.max_time * 1000 if self.max_time else None,
            'runs': len(self.timings),
            'memory_kb': self.memory_kb,
            'error': self.error,
            'metadata': self.metadata
        }
 class BeetFSBenchmark(object):
    """Benchmark harness for beetfs."""
    def __init__(self, output_dir):
        self.output_dir = output_dir
        self.results = []
        self.temp_dir = None
        self.mount_dir = None
        self.music_dir = None
        self.db_path = None
        self.mount_process = None
    def setup(self, num_tracks=10, track_size_mb=5):
        """Create test environment with synthetic tracks."""
        self.temp_dir = tempfile.mkdtemp(prefix='beetfs_bench_')
        self.mount_dir = os.path.join(self.temp_dir, 'mount')
        self.music_dir = os.path.join(self.temp_dir, 'music')
        self.db_path = os.path.join(self.temp_dir, 'library.db')
        self.config_dir = os.path.join(self.temp_dir, 'config')
        os.makedirs(self.mount_dir)
        os.makedirs(self.music_dir)
        os.makedirs(self.config_dir)
        # Create beets config
        config_path = os.path.join(self.config_dir, 'config.yaml')
        with open(config_path, 'w') as f:
            f.write('directory: {}\n'.format(self.music_dir))
            f.write('library: {}\n'.format(self.db_path))
            f.write('plugins: []\n')
        os.environ['BEETSDIR'] = self.config_dir
        # Create synthetic FLAC files
        print("Creating {} synthetic tracks ({} MB each)...".format(num_tracks, track_size_mb))
        track_paths = []
        for i in range(num_tracks):
            artist = 'Bench Artist'
            album = 'Bench Album'
            title = 'Track {:03d}'.format(i + 1)
            filename = '{:02d} - {} - {}.flac'.format(i + 1, artist, title)
            track_path = os.path.join(self.music_dir, artist, album, filename)
            self._makedirs(os.path.dirname(track_path))
            create_synthetic_flac(track_path, duration_sec=track_size_mb * 10,
                                  artist=artist, title=title, album=album, track=str(i + 1))
            track_paths.append(track_path)
        # Import into beets library
        print("Importing tracks into beets library...")
        from beets import config
        from beets.library import Library
        config.read(user=False)
        config['directory'].set(self.music_dir)
        config['library'].set(self.db_path)
        lib = Library(self.db_path)
        from beets.library import Item
        for i, path in enumerate(track_paths):
            item = Item(
                path=path,
                artist=u'Bench Artist',
                album=u'Bench Album',
                title=u'Track {:03d}'.format(i + 1),
                track=i + 1,
                year=2024,
                genre=u'Benchmark',
                format='flac'
            )
            lib.add(item)
        lib._close()
        return len(track_paths)
    def _makedirs(self, path):
        """Python 2 compatible makedirs."""
        if not os.path.exists(path):
            os.makedirs(path)
    def teardown(self):
        """Clean up test environment."""
        self.unmount()
        if self.temp_dir and os.path.exists(self.temp_dir):
            shutil.rmtree(self.temp_dir, ignore_errors=True)
    def mount(self):
        """Mount beetfs and return time taken."""
        # Create mount script
        beetfs_root = os.path.dirname(os.path.dirname(os.path.abspath(__file__)))
        beetsplug = os.path.join(beetfs_root, 'beetsplug')
        mount_script = '''
 import sys
 sys.path.insert(0, "{beetfs_root}")
 sys.path.insert(0, "{beetsplug}")
 import os
 import re
 os.environ["BEETSDIR"] = "{config_dir}"
 from beets import config
 from beets.library import Library
 config.read(user=False)
 config["directory"] = "{music_dir}"
 config["library"] = "{db_path}"
 lib = Library("{db_path}")
 import beetFs
 import fuse
 fuse.fuse_python_api = (0, 2)
 beetFs.library = lib
 beetFs.structure_depth = 4
 beetFs.structure_split = [0, 1, 2, 3]
 beetFs.directory_structure = beetFs.FSNode({{}}, {{}})
 for item in lib.items():
    mapping = beetFs.template_mapping(lib, item)
    path_str = beetFs.PATH_FORMAT
    for key, val in mapping.items():
        if val is not None:
            clean_val = re.sub(r"[\\\\/:]|^\\.", "_", unicode(val))
            path_str = path_str.replace("$" + key, clean_val)
    elements = path_str.split("/")
    sub_elements = elements[0:beetFs.structure_depth-1]
    for level in range(len(sub_elements)):
        level_subbed = sub_elements[0:level+1]
        beetFs.directory_structure.adddir(sub_elements, level_subbed[level])
    beetFs.directory_structure.addfile(
        sub_elements,
        elements[beetFs.structure_depth-1],
        item.id
    )
 fs = beetFs.beetFileSystem(
    version="%prog " + fuse.__version__,
    usage="beetfs benchmark",
    dash_s_do="setsingle"
 )
 fs.parser.add_option(mountopt="root", metavar="PATH", default="{music_dir}",
                     help="music library root path")
 fs.parse(args=["{mount_dir}"], errex=1)
 fs.flags = 0
 fs.multithreaded = False
 fs.fuse_args.setmod("foreground")
 fs.fuse_args.add("fsname=beetfs")
 fs.fuse_args.add("nonempty")
 fs.lib = lib
 fs.main()
 '''.format(
            beetfs_root=beetfs_root,
            beetsplug=beetsplug,
            config_dir=self.config_dir,
            music_dir=self.music_dir,
            db_path=self.db_path,
            mount_dir=self.mount_dir
        )
        script_path = os.path.join(self.temp_dir, 'mount.py')
        with open(script_path, 'w') as f:
            f.write(mount_script)
        start_time = time.time()
        self.mount_process = subprocess.Popen(
            [sys.executable, script_path],
            stdout=subprocess.PIPE,
            stderr=subprocess.PIPE
        )
        # Wait for mount
        timeout = 30
        poll_interval = 0.05
        elapsed = 0
        while elapsed < timeout:
            if os.path.ismount(self.mount_dir):
                mount_time = time.time() - start_time
                return mount_time
            time.sleep(poll_interval)
            elapsed += poll_interval
            # Check if process died
            if self.mount_process.poll() is not None:
                stdout, stderr = self.mount_process.communicate()
                raise RuntimeError("Mount process died: {}".format(stderr.decode('utf-8', errors='replace')))
        raise RuntimeError("Mount timeout after {} seconds".format(timeout))
    def unmount(self):
        """Unmount beetfs."""
        if os.path.ismount(self.mount_dir):
            subprocess.call(['fusermount', '-u', self.mount_dir])
            time.sleep(0.5)
        if self.mount_process and self.mount_process.poll() is None:
            self.mount_process.terminate()
            try:
                self.mount_process.wait(timeout=5)
            except:
                self.mount_process.kill()
    def get_memory_usage(self):
        """Get current process memory usage in KB."""
        if self.mount_process and self.mount_process.poll() is None:
            try:
                with open('/proc/{}/status'.format(self.mount_process.pid)) as f:
                    for line in f:
                        if line.startswith('VmRSS:'):
                            return int(line.split()[1])
            except:
                pass
        return None
    # ========================
    # BENCHMARK METHODS
    # ========================
    def bench_mount_time(self, runs=5):
        """Benchmark mount time."""
        result = BenchmarkResult('mount_time')
        print("\n=== Mount Time Benchmark ({} runs) ===".format(runs))
        for i in range(runs):
            try:
                mount_time = self.mount()
                result.add_timing(mount_time)
                print("  Run {}: {:.3f}s".format(i + 1, mount_time))
                result.memory_kb = self.get_memory_usage()
                self.unmount()
                time.sleep(0.5)
            except Exception as e:
                result.error = str(e)
                print("  Run {}: ERROR - {}".format(i + 1, e))
                break
        self.results.append(result)
        return result
    def bench_stat_latency(self, runs=50):
        """Benchmark single stat() call latency."""
        result = BenchmarkResult('stat_latency')
        print("\n=== Stat Latency Benchmark ({} runs) ===".format(runs))
        try:
            self.mount()
            time.sleep(1)  # Let mount settle
            # Find a file to stat
            test_path = None
            for root, dirs, files in os.walk(self.mount_dir):
                if files:
                    test_path = os.path.join(root, files[0])
                    break
            if not test_path:
                result.error = "No files found in mount"
                self.results.append(result)
                return result
            result.metadata['test_path'] = test_path
            for i in range(runs):
                start = time.time()
                try:
                    os.stat(test_path)
                    elapsed = time.time() - start
                    result.add_timing(elapsed)
                except OSError as e:
                    result.error = "stat failed: {} (errno {})".format(e.strerror, e.errno)
                    print("  ERROR: {}".format(result.error))
                    break
            if result.timings:
                print("  Mean: {:.3f}ms, Min: {:.3f}ms, Max: {:.3f}ms".format(
                    result.mean * 1000, result.min_time * 1000, result.max_time * 1000))
            self.unmount()
        except Exception as e:
            result.error = str(e)
            print("  ERROR: {}".format(e))
        self.results.append(result)
        return result
    def bench_readdir(self, runs=20):
        """Benchmark directory listing."""
        result = BenchmarkResult('readdir')
        print("\n=== Readdir Benchmark ({} runs) ===".format(runs))
        try:
            self.mount()
            time.sleep(1)
            for i in range(runs):
                start = time.time()
                try:
                    entries = os.listdir(self.mount_dir)
                    elapsed = time.time() - start
                    result.add_timing(elapsed)
                    if i == 0:
                        result.metadata['entry_count'] = len(entries)
                except OSError as e:
                    result.error = "listdir failed: {} (errno {})".format(e.strerror, e.errno)
                    print("  ERROR: {}".format(result.error))
                    break
            if result.timings:
                print("  Mean: {:.3f}ms, Entries: {}".format(
                    result.mean * 1000, result.metadata.get('entry_count', 'N/A')))
            self.unmount()
        except Exception as e:
            result.error = str(e)
            print("  ERROR: {}".format(e))
        self.results.append(result)
        return result
    def bench_file_open(self, runs=10):
        """Benchmark file open latency."""
        result = BenchmarkResult('file_open')
        print("\n=== File Open Benchmark ({} runs) ===".format(runs))
        try:
            self.mount()
            time.sleep(1)
            # Find a file to open
            test_path = None
            for root, dirs, files in os.walk(self.mount_dir):
                if files:
                    test_path = os.path.join(root, files[0])
                    break
            if not test_path:
                result.error = "No files found in mount"
                self.results.append(result)
                return result
            result.metadata['test_path'] = test_path
            for i in range(runs):
                # Clear page cache between runs (requires sudo, skip if not available)
                try:
                    subprocess.call(['sync'])
                except:
                    pass
                start = time.time()
                try:
                    f = open(test_path, 'rb')
                    f.read(1)  # Trigger actual open
                    f.close()
                    elapsed = time.time() - start
                    result.add_timing(elapsed)
                except (IOError, OSError) as e:
                    result.error = "open failed: {}".format(e)
                    print("  ERROR: {}".format(result.error))
                    break
            if result.timings:
                print("  Mean: {:.3f}ms, Min: {:.3f}ms, Max: {:.3f}ms".format(
                    result.mean * 1000, result.min_time * 1000, result.max_time * 1000))
            self.unmount()
        except Exception as e:
            result.error = str(e)
            print("  ERROR: {}".format(e))
        self.results.append(result)
        return result
    def bench_read_throughput(self):
        """Benchmark read throughput."""
        result = BenchmarkResult('read_throughput')
        print("\n=== Read Throughput Benchmark ===")
        try:
            self.mount()
            time.sleep(1)
            # Find a file to read
            test_path = None
            for root, dirs, files in os.walk(self.mount_dir):
                if files:
                    test_path = os.path.join(root, files[0])
                    break
            if not test_path:
                result.error = "No files found in mount"
                self.results.append(result)
                return result
            result.metadata['test_path'] = test_path
            # Read entire file and measure throughput
            start = time.time()
            try:
                with open(test_path, 'rb') as f:
                    data = f.read()
                elapsed = time.time() - start
                file_size = len(data)
                throughput_mbps = (file_size / (1024 * 1024)) / elapsed if elapsed > 0 else 0
                result.add_timing(elapsed)
                result.metadata['file_size_bytes'] = file_size
                result.metadata['throughput_mbps'] = throughput_mbps
                print("  File size: {:.2f} MB, Time: {:.3f}s, Throughput: {:.2f} MB/s".format(
                    file_size / (1024 * 1024), elapsed, throughput_mbps))
            except (IOError, OSError) as e:
                result.error = "read failed: {}".format(e)
                print("  ERROR: {}".format(result.error))
            self.unmount()
        except Exception as e:
            result.error = str(e)
            print("  ERROR: {}".format(e))
        self.results.append(result)
        return result
    def bench_memory_usage(self):
        """Benchmark memory usage."""
        result = BenchmarkResult('memory_usage')
        print("\n=== Memory Usage Benchmark ===")
        try:
            self.mount()
            time.sleep(2)
            # Measure idle memory
            idle_mem = self.get_memory_usage()
            result.metadata['idle_memory_kb'] = idle_mem
            print("  Idle memory: {} KB".format(idle_mem))
            # Open a file and measure
            test_path = None
            for root, dirs, files in os.walk(self.mount_dir):
                if files:
                    test_path = os.path.join(root, files[0])
                    break
            if test_path:
                try:
                    with open(test_path, 'rb') as f:
                        f.read()
                    after_read_mem = self.get_memory_usage()
                    result.metadata['after_read_memory_kb'] = after_read_mem
                    print("  After file read: {} KB".format(after_read_mem))
                    if idle_mem and after_read_mem:
                        print("  Memory increase: {} KB".format(after_read_mem - idle_mem))
                except (IOError, OSError) as e:
                    result.error = "read failed: {}".format(e)
            result.memory_kb = self.get_memory_usage()
            self.unmount()
        except Exception as e:
            result.error = str(e)
            print("  ERROR: {}".format(e))
        self.results.append(result)
        return result
    def bench_enoent_lookup(self, runs=50):
        """Benchmark ENOENT lookup (missing file) latency."""
        result = BenchmarkResult('enoent_lookup')
        print("\n=== ENOENT Lookup Benchmark ({} runs) ===".format(runs))
        try:
            self.mount()
            time.sleep(1)
            # Non-existent file path
            missing_path = os.path.join(self.mount_dir, 'nonexistent', 'cover.jpg')
            for i in range(runs):
                start = time.time()
                try:
                    os.stat(missing_path)
                except OSError:
                    pass  # Expected
                elapsed = time.time() - start
                result.add_timing(elapsed)
            if result.timings:
                print("  Mean: {:.3f}ms, Min: {:.3f}ms, Max: {:.3f}ms".format(
                    result.mean * 1000, result.min_time * 1000, result.max_time * 1000))
            self.unmount()
        except Exception as e:
            result.error = str(e)
            print("  ERROR: {}".format(e))
        self.results.append(result)
        return result
    def save_results(self, filename='benchmark_results.json'):
        """Save results to JSON file."""
        output_path = os.path.join(self.output_dir, filename)
        data = {
            'timestamp': datetime.datetime.now().isoformat(),
            'results': [r.to_dict() for r in self.results]
        }
        with open(output_path, 'w') as f:
            json.dump(data, f, indent=2)
        print("\nResults saved to: {}".format(output_path))
        return output_path
 def main():
    print("=" * 60)
    print("beetfs Benchmark Suite")
    print("=" * 60)
    output_dir = os.path.join(os.path.dirname(os.path.abspath(__file__)), 'results')
    if not os.path.exists(output_dir):
        os.makedirs(output_dir)
    bench = BeetFSBenchmark(output_dir)
    try:
        # Setup with 10 tracks, 5MB each
        num_tracks = bench.setup(num_tracks=10, track_size_mb=5)
        print("Setup complete: {} tracks".format(num_tracks))
        # Run benchmarks
        bench.bench_mount_time(runs=3)
        bench.bench_readdir(runs=10)
        bench.bench_stat_latency(runs=20)
        bench.bench_enoent_lookup(runs=20)
        bench.bench_file_open(runs=5)
        bench.bench_read_throughput()
        bench.bench_memory_usage()
        # Save results
        bench.save_results()
    finally:
        bench.teardown()
    # Print summary
    print("\n" + "=" * 60)
    print("SUMMARY")
    print("=" * 60)
    for r in bench.results:
        status = "OK" if not r.error else "FAIL"
        mean_str = "{:.3f}ms".format(r.mean * 1000) if r.mean else "N/A"
        print("{:20} {:6} Mean: {:>12} Error: {}".format(
            r.name, status, mean_str, r.error or "None"))
 if __name__ == '__main__':
    main()
@@ -1,107 +0,0 @@
 # MusicFS Configuration
 # Copy to /etc/musicfs/config.toml or ~/.config/musicfs/config.toml
 # Required: where to mount the virtual filesystem
 mount_point = "/mnt/music"
 # Required: directory for cache data (CAS chunks, metadata, search index)
 cache_dir = "/var/cache/musicfs"
 # ------------------------------------------------------------------------------
 # Origins - music sources (at least one required)
 # Supported types: local, nfs, smb, s3, sftp
 # Lower priority number = preferred source for failover
 # ------------------------------------------------------------------------------
 [[origins]]
 id = "local-music"
 origin_type = "local"
 priority = 1
 enabled = true
 path = "/home/user/Music"
 [[origins]]
 id = "nas-nfs"
 origin_type = "nfs"
 priority = 2
 enabled = true
 path = "/mnt/nas/music"
 [[origins]]
 id = "nas-smb"
 origin_type = "smb"
 priority = 3
 enabled = false
 path = "/mnt/smb/music"
 [[origins]]
 id = "cloud-backup"
 origin_type = "s3"
 priority = 10
 enabled = false
 bucket = "my-music-backup"
 region = "us-east-1"
 [[origins]]
 id = "remote-server"
 origin_type = "sftp"
 priority = 10
 enabled = false
 host = "music.example.com"
 port = 22
 user = "musicfs"
 path = "/srv/music"
 # ------------------------------------------------------------------------------
 # Cache settings
 # ------------------------------------------------------------------------------
 [cache]
 # In-memory metadata cache size (artist/album/track info)
 metadata_cache_mb = 100
 # On-disk content cache size (audio chunks)
 content_cache_gb = 10
 # ------------------------------------------------------------------------------
 # Health monitoring for origin failover
 # ------------------------------------------------------------------------------
 [health]
 # How often to check origin health
 check_interval_secs = 30
 # Timeout for health check probes
 timeout_ms = 5000
 # Consecutive failures before marking origin unhealthy
 unhealthy_threshold = 3
 # Per-origin type thresholds (overrides unhealthy_threshold)
 [health.per_origin_thresholds]
 local = 1
 nfs = 3
 smb = 3
 s3 = 3
 sftp = 3
 # ------------------------------------------------------------------------------
 # Logging
 # ------------------------------------------------------------------------------
 [logging]
 # Directory for log files
 log_dir = "/var/log/musicfs"
 # Output logs as JSON (for log aggregators)
 json_output = false
 # Send logs to systemd journal
 journald = true
 # Log level filter (tracing format)
 # Examples: "info", "debug", "musicfs=debug,warn", "musicfs_fuse=trace"
 level = "musicfs=info,warn"
 # Trace sampling rate for performance tracing (0.0 to 1.0)
 trace_sample_rate = 1.0
@@ -1,25 +0,0 @@
 mount_point = "./dev/music"
 cache_dir = "./dev/cache/musicfs"
 [[origins]]
 id = "local-storage"
 origin_type = "local"
 priority = 1
 enabled = true
 path = "/home/fujin/.local/share/docker/volumes/containers_downloads/_data"
 [cache]
 metadata_cache_mb = 100
 content_cache_gb = 10
 [health]
 check_interval_secs = 30
 timeout_ms = 5000
 unhealthy_threshold = 3
 [logging]
 log_dir = "./dev/log"
 json_output = false
 journald = true
 level = "musicfs=info,warn"
 trace_sample_rate = 1.0
@@ -1,25 +0,0 @@
 [package]
 name = "musicfs-cache"
 version.workspace = true
 edition.workspace = true
 [dependencies]
 musicfs-core = { path = "../musicfs-core" }
 musicfs-cas = { path = "../musicfs-cas" }
 musicfs-metadata = { path = "../musicfs-metadata" }
 bytes.workspace = true
 rusqlite = { workspace = true, features = ["bundled"] }
 sled.workspace = true
 tokio.workspace = true
 tracing.workspace = true
 thiserror.workspace = true
 serde.workspace = true
 rmp-serde.workspace = true
 serde_json.workspace = true
 image.workspace = true
 lofty = "0.24"
 parking_lot.workspace = true
 chrono.workspace = true
 [dev-dependencies]
 tempfile.workspace = true
@@ -1,213 +0,0 @@
 use image::ImageFormat;
 use musicfs_cas::CasStore;
 use musicfs_core::ChunkHash;
 use musicfs_metadata::artwork::{ArtSize, ArtType, Artwork};
 use std::io::Cursor;
 use std::path::Path;
 use std::sync::Arc;
 use tracing::{debug, info, trace, warn};
 const MAX_ARTWORK_INPUT_SIZE: usize = 10 * 1024 * 1024;
 pub struct ArtworkCache {
    store: Arc<CasStore>,
    db_path: std::path::PathBuf,
 }
 #[derive(Debug)]
 pub struct CachedArtwork {
    pub file_id: i64,
    pub art_type: String,
    pub chunk_hash: ChunkHash,
    pub width: u32,
    pub height: u32,
 }
 impl ArtworkCache {
    pub fn new(store: Arc<CasStore>, db_path: &Path) -> Result<Self, ArtworkError> {
        let db = rusqlite::Connection::open(db_path)?;
        db.execute(
            "CREATE TABLE IF NOT EXISTS artwork (
                id INTEGER PRIMARY KEY,
                file_id INTEGER NOT NULL,
                art_type TEXT NOT NULL,
                chunk_hash TEXT NOT NULL,
                width INTEGER NOT NULL,
                height INTEGER NOT NULL,
                UNIQUE(file_id, art_type)
            )",
            [],
        )?;
        info!(path = ?db_path, "Artwork cache opened");
        Ok(Self {
            store,
            db_path: db_path.to_path_buf(),
        })
    }
    pub async fn store(&self, file_id: i64, artwork: &Artwork) -> Result<ChunkHash, ArtworkError> {
        trace!(
            file_id = file_id,
            size_bytes = artwork.data.len(),
            "Storing artwork"
        );
        if artwork.data.len() > MAX_ARTWORK_INPUT_SIZE {
            warn!(
                file_id = file_id,
                size = artwork.data.len(),
                max = MAX_ARTWORK_INPUT_SIZE,
                "Artwork too large"
            );
            return Err(ArtworkError::ImageTooLarge(artwork.data.len()));
        }
        let hash = self.store.put(&artwork.data).await?;
        let art_type_str = match artwork.art_type {
            ArtType::Front => "front",
            ArtType::Back => "back",
            ArtType::Other => "other",
        };
        let db_path = self.db_path.clone();
        let art_type_clone = art_type_str.to_string();
        let hash_hex = hash.to_hex();
        let width = artwork.width;
        let height = artwork.height;
        tokio::task::spawn_blocking(move || {
            let db = rusqlite::Connection::open(&db_path)?;
            db.execute(
                "INSERT OR REPLACE INTO artwork 
                 (file_id, art_type, chunk_hash, width, height) 
                 VALUES (?1, ?2, ?3, ?4, ?5)",
                rusqlite::params![file_id, art_type_clone, hash_hex, width, height],
            )?;
            Ok::<_, ArtworkError>(())
        })
        .await
        .map_err(|e| ArtworkError::SpawnBlocking(e.to_string()))??;
        debug!("Cached artwork for file {}", file_id);
        Ok(hash)
    }
    pub async fn get(
        &self,
        file_id: i64,
        art_type: &str,
        size: ArtSize,
    ) -> Result<Option<Vec<u8>>, ArtworkError> {
        trace!(file_id = file_id, art_type = %art_type, "Getting artwork");
        let db_path = self.db_path.clone();
        let art_type_clone = art_type.to_string();
        let hash_hex: Option<String> = tokio::task::spawn_blocking(move || {
            let db = rusqlite::Connection::open(&db_path)?;
            db.query_row(
                "SELECT chunk_hash FROM artwork WHERE file_id = ?1 AND art_type = ?2",
                rusqlite::params![file_id, art_type_clone],
                |row| row.get(0),
            )
            .ok()
            .ok_or(ArtworkError::NotFound)
        })
        .await
        .map_err(|e| ArtworkError::SpawnBlocking(e.to_string()))?
        .ok();
        match hash_hex {
            Some(hex) => {
                trace!(file_id = file_id, "Artwork cache hit");
                let hash = ChunkHash::from_hex(&hex).ok_or(ArtworkError::InvalidHash)?;
                let data = self.store.get(&hash).await?;
                match size {
                    ArtSize::Full => Ok(Some(data.to_vec())),
                    ArtSize::Thumbnail | ArtSize::Medium => {
                        let resized = self.resize_on_demand(&data, size)?;
                        Ok(Some(resized))
                    }
                }
            }
            None => {
                trace!(file_id = file_id, "Artwork cache miss");
                Ok(None)
            }
        }
    }
    pub async fn has(&self, file_id: i64, art_type: &str) -> Result<bool, ArtworkError> {
        let db_path = self.db_path.clone();
        let art_type_clone = art_type.to_string();
        tokio::task::spawn_blocking(move || {
            let db = rusqlite::Connection::open(&db_path)?;
            let count: i64 = db.query_row(
                "SELECT COUNT(*) FROM artwork WHERE file_id = ?1 AND art_type = ?2",
                rusqlite::params![file_id, art_type_clone],
                |row| row.get(0),
            )?;
            Ok(count > 0)
        })
        .await
        .map_err(|e| ArtworkError::SpawnBlocking(e.to_string()))?
    }
    fn resize_on_demand(&self, data: &[u8], size: ArtSize) -> Result<Vec<u8>, ArtworkError> {
        let max_dim = size.max_dimension().unwrap_or(300);
        let img = image::load_from_memory(data).map_err(|_| ArtworkError::InvalidImage)?;
        if img.width() <= max_dim && img.height() <= max_dim {
            return Ok(data.to_vec());
        }
        let resized = img.thumbnail(max_dim, max_dim);
        let mut output = Vec::new();
        let mut cursor = Cursor::new(&mut output);
        resized
            .write_to(&mut cursor, ImageFormat::Jpeg)
            .map_err(|_| ArtworkError::ResizeFailed)?;
        Ok(output)
    }
 }
 #[derive(Debug, thiserror::Error)]
 pub enum ArtworkError {
    #[error("database error: {0}")]
    Database(#[from] rusqlite::Error),
    #[error("CAS error: {0}")]
    Cas(#[from] musicfs_cas::CasError),
    #[error("invalid hash")]
    InvalidHash,
    #[error("artwork not found")]
    NotFound,
    #[error("image too large: {0} bytes (max 10MB)")]
    ImageTooLarge(usize),
    #[error("invalid image data")]
    InvalidImage,
    #[error("resize failed")]
    ResizeFailed,
    #[error("spawn_blocking error: {0}")]
    SpawnBlocking(String),
 }
 #[cfg(test)]
 mod tests {
    use super::*;
    #[test]
    fn test_max_artwork_size() {
        assert_eq!(MAX_ARTWORK_INPUT_SIZE, 10 * 1024 * 1024);
    }
 }
@@ -1,155 +0,0 @@
 use musicfs_cas::CasStore;
 use musicfs_core::ChunkHash;
 use parking_lot::RwLock;
 use std::collections::BTreeMap;
 use std::time::Instant;
 use tracing::info;
 pub trait EvictionPolicy: Send + Sync {
    fn record_access(&self, hash: ChunkHash);
    fn select_victims(&self, count: usize) -> Vec<ChunkHash>;
    fn remove(&self, hash: &ChunkHash);
 }
 pub struct LruEviction {
    access_times: RwLock<BTreeMap<Instant, ChunkHash>>,
    hash_to_time: RwLock<std::collections::HashMap<ChunkHash, Instant>>,
 }
 impl LruEviction {
    pub fn new() -> Self {
        Self {
            access_times: RwLock::new(BTreeMap::new()),
            hash_to_time: RwLock::new(std::collections::HashMap::new()),
        }
    }
    pub async fn evict_to_target(
        &self,
        store: &CasStore,
        target_size: u64,
    ) -> Result<u64, EvictionError> {
        let mut bytes_freed = 0u64;
        while store.current_size() > target_size {
            let victims = self.select_victims(10);
            if victims.is_empty() {
                break;
            }
            for hash in victims {
                if let Ok(data) = store.get(&hash).await {
                    bytes_freed += data.len() as u64;
                    store.delete(&hash).await?;
                    self.remove(&hash);
                }
            }
        }
        if bytes_freed > 0 {
            info!("Evicted {} bytes from cache", bytes_freed);
        }
        Ok(bytes_freed)
    }
 }
 impl Default for LruEviction {
    fn default() -> Self {
        Self::new()
    }
 }
 impl EvictionPolicy for LruEviction {
    fn record_access(&self, hash: ChunkHash) {
        let now = Instant::now();
        let mut times = self.access_times.write();
        let mut h2t = self.hash_to_time.write();
        if let Some(old_time) = h2t.remove(&hash) {
            times.remove(&old_time);
        }
        times.insert(now, hash);
        h2t.insert(hash, now);
    }
    fn select_victims(&self, count: usize) -> Vec<ChunkHash> {
        let times = self.access_times.read();
        times.values().take(count).copied().collect()
    }
    fn remove(&self, hash: &ChunkHash) {
        let mut times = self.access_times.write();
        let mut h2t = self.hash_to_time.write();
        if let Some(time) = h2t.remove(hash) {
            times.remove(&time);
        }
    }
 }
 #[derive(Debug, thiserror::Error)]
 pub enum EvictionError {
    #[error("CAS error: {0}")]
    Cas(#[from] musicfs_cas::CasError),
 }
 #[cfg(test)]
 mod tests {
    use super::*;
    #[test]
    fn test_lru_access_order() {
        let lru = LruEviction::new();
        let h1 = ChunkHash::from_bytes(b"chunk1");
        let h2 = ChunkHash::from_bytes(b"chunk2");
        let h3 = ChunkHash::from_bytes(b"chunk3");
        lru.record_access(h1);
        std::thread::sleep(std::time::Duration::from_millis(1));
        lru.record_access(h2);
        std::thread::sleep(std::time::Duration::from_millis(1));
        lru.record_access(h3);
        let victims = lru.select_victims(2);
        assert_eq!(victims.len(), 2);
        assert_eq!(victims[0], h1);
        assert_eq!(victims[1], h2);
    }
    #[test]
    fn test_lru_reaccess_updates_order() {
        let lru = LruEviction::new();
        let h1 = ChunkHash::from_bytes(b"chunk1");
        let h2 = ChunkHash::from_bytes(b"chunk2");
        lru.record_access(h1);
        std::thread::sleep(std::time::Duration::from_millis(1));
        lru.record_access(h2);
        std::thread::sleep(std::time::Duration::from_millis(1));
        lru.record_access(h1);
        let victims = lru.select_victims(1);
        assert_eq!(victims[0], h2);
    }
    #[test]
    fn test_lru_remove() {
        let lru = LruEviction::new();
        let h1 = ChunkHash::from_bytes(b"chunk1");
        let h2 = ChunkHash::from_bytes(b"chunk2");
        lru.record_access(h1);
        lru.record_access(h2);
        lru.remove(&h1);
        let victims = lru.select_victims(10);
        assert_eq!(victims.len(), 1);
        assert_eq!(victims[0], h2);
    }
 }
@@ -1,103 +0,0 @@
 use crate::FormatLayout;
 use musicfs_core::AudioMeta;
 use std::collections::HashMap;
 use std::sync::Arc;
 /// Error types for format handling operations
 #[derive(Debug, thiserror::Error)]
 pub enum FormatError {
    #[error("Unsupported format")]
    UnsupportedFormat,
    #[error("Invalid data: {0}")]
    InvalidData(String),
    #[error("Synthesis failed: {0}")]
    SynthesisFailed(String),
 }
 /// Trait for format-specific metadata handling.
 ///
 /// Implementations handle:
 /// 1. Analyzing original files to find audio boundaries
 /// 2. Synthesizing new headers from database metadata
 pub trait FormatHandler: Send + Sync + 'static {
    /// Unique identifier for this handler
    fn id(&self) -> &'static str;
    /// Human-readable name
    fn name(&self) -> &'static str;
    /// File extensions this handler supports
    fn extensions(&self) -> &[&'static str];
    /// MIME types this handler supports
    fn mime_types(&self) -> &[&'static str];
    /// Analyze file bytes to determine audio layout
    fn analyze(
        &self,
        data: &[u8],
        file_size: u64,
    ) -> std::result::Result<FormatLayout, FormatError>;
    /// Synthesize header bytes from metadata. Called on every read().
    fn synthesize(
        &self,
        metadata: &AudioMeta,
        layout: &FormatLayout,
    ) -> std::result::Result<Vec<u8>, FormatError>;
    /// Extract metadata from header bytes (for initial ingest)
    fn extract(&self, data: &[u8]) -> std::result::Result<AudioMeta, FormatError>;
    /// Estimate header size without full synthesis (for getattr)
    fn estimate_header_size(&self, _metadata: &AudioMeta) -> usize {
        10 * 1024 // 10KB default
    }
 }
 /// Registry for format handlers
 pub struct FormatHandlerRegistry {
    handlers: HashMap<String, Arc<dyn FormatHandler>>,
    extension_map: HashMap<String, String>,
 }
 impl FormatHandlerRegistry {
    /// Create empty registry
    pub fn new() -> Self {
        Self {
            handlers: HashMap::new(),
            extension_map: HashMap::new(),
        }
    }
    /// Register a format handler
    pub fn register(&mut self, handler: Arc<dyn FormatHandler>) {
        let id = handler.id().to_string();
        // Map extensions to handler ID
        for ext in handler.extensions() {
            self.extension_map.insert(ext.to_string(), id.clone());
        }
        self.handlers.insert(id, handler);
    }
    /// Get handler by file extension
    pub fn get_by_extension(&self, ext: &str) -> Option<Arc<dyn FormatHandler>> {
        let id = self.extension_map.get(ext)?;
        self.handlers.get(id).cloned()
    }
    /// Get handler by format ID
    pub fn get_by_format(&self, format: &str) -> Option<Arc<dyn FormatHandler>> {
        self.handlers.get(format).cloned()
    }
 }
 impl Default for FormatHandlerRegistry {
    fn default() -> Self {
        Self::new()
    }
 }
@@ -1,22 +0,0 @@
 use musicfs_core::AudioFormat;
 use serde::{Deserialize, Serialize};
 /// Describes the byte layout of an audio file for overlay splicing.
 ///
 /// This struct tracks where the audio data begins and ends in the origin file,
 /// allowing the OverlayReader to splice synthetic headers with original audio.
 #[derive(Debug, Clone, Serialize, Deserialize)]
 pub struct FormatLayout {
    /// Byte offset where audio data begins in the origin file
    pub audio_start: u64,
    /// Byte offset where audio data ends in the origin file
    pub audio_end: u64,
    /// Audio format (from musicfs-core)
    pub format: AudioFormat,
    /// Format-specific data (e.g., FLAC STREAMINFO block, MP4 stco offsets)
    /// Stored as raw bytes, interpreted by format handlers
    pub format_data: Option<Vec<u8>>,
 }
@@ -1,886 +0,0 @@
 //! FLAC format handler for metadata synthesis.
 //!
 //! FLAC files use Vorbis comments for metadata. The file structure is:
 //! - "fLaC" marker (4 bytes)
 //! - STREAMINFO block (mandatory, 38 bytes total: 4 header + 34 data)
 //! - Optional metadata blocks (VORBIS_COMMENT, PICTURE, PADDING, etc.)
 //! - Audio frames
 //!
 //! CRITICAL: STREAMINFO must be preserved from the original file as it contains
 //! MD5 checksum, sample count, and audio properties that must match the audio data.
 use crate::{FormatError, FormatHandler, FormatLayout};
 use lofty::config::ParseOptions;
 use lofty::file::AudioFile;
 use lofty::flac::FlacFile;
 use lofty::ogg::VorbisComments;
 use lofty::tag::Accessor;
 use musicfs_core::{AudioFormat, AudioMeta};
 use std::borrow::Cow;
 use std::io::Cursor;
 /// FLAC stream marker: "fLaC" in ASCII
 const FLAC_MARKER: &[u8; 4] = b"fLaC";
 /// FLAC metadata block types
 const BLOCK_TYPE_STREAMINFO: u8 = 0;
 const BLOCK_TYPE_VORBIS_COMMENT: u8 = 4;
 /// STREAMINFO block data size (always 34 bytes)
 const STREAMINFO_DATA_SIZE: usize = 34;
 /// Metadata block header size (1 byte type/flags + 3 bytes length)
 const BLOCK_HEADER_SIZE: usize = 4;
 /// Full STREAMINFO block size (header + data)
 const STREAMINFO_BLOCK_SIZE: usize = BLOCK_HEADER_SIZE + STREAMINFO_DATA_SIZE;
 pub struct FlacHandler;
 impl FlacHandler {
    pub fn new() -> Self {
        Self
    }
    /// Parse FLAC metadata block header.
    /// Returns (is_last, block_type, block_size).
    fn parse_block_header(data: &[u8]) -> Option<(bool, u8, usize)> {
        if data.len() < BLOCK_HEADER_SIZE {
            return None;
        }
        let is_last = (data[0] & 0x80) != 0;
        let block_type = data[0] & 0x7F;
        let block_size =
            ((data[1] as usize) << 16) | ((data[2] as usize) << 8) | (data[3] as usize);
        Some((is_last, block_type, block_size))
    }
    /// Write a metadata block header.
    fn write_block_header(is_last: bool, block_type: u8, size: usize) -> [u8; 4] {
        let type_byte = if is_last {
            block_type | 0x80
        } else {
            block_type
        };
        [
            type_byte,
            ((size >> 16) & 0xFF) as u8,
            ((size >> 8) & 0xFF) as u8,
            (size & 0xFF) as u8,
        ]
    }
    /// Build Vorbis comments from AudioMeta.
    fn build_vorbis_comments(metadata: &AudioMeta) -> VorbisComments {
        let mut tag = VorbisComments::default();
        // Basic fields (using Accessor trait)
        if let Some(ref title) = metadata.title {
            tag.set_title(title.clone());
        }
        if let Some(ref artist) = metadata.artist {
            tag.set_artist(artist.clone());
        }
        if let Some(ref album) = metadata.album {
            tag.set_album(album.clone());
        }
        if let Some(ref genre) = metadata.genre {
            tag.set_genre(genre.clone());
        }
        // Album artist
        if let Some(ref album_artist) = metadata.album_artist {
            tag.insert("ALBUMARTIST".to_string(), album_artist.clone());
        }
        // Year/Date
        if let Some(ref date) = metadata.date {
            tag.insert("DATE".to_string(), date.clone());
        } else if let Some(year) = metadata.year {
            tag.insert("DATE".to_string(), year.to_string());
        }
        // Track/Disc numbers
        if let Some(track) = metadata.track {
            tag.insert("TRACKNUMBER".to_string(), track.to_string());
        }
        if let Some(track_total) = metadata.track_total {
            tag.insert("TRACKTOTAL".to_string(), track_total.to_string());
        }
        if let Some(disc) = metadata.disc {
            tag.insert("DISCNUMBER".to_string(), disc.to_string());
        }
        if let Some(disc_total) = metadata.disc_total {
            tag.insert("DISCTOTAL".to_string(), disc_total.to_string());
        }
        // Extended metadata
        if let Some(ref composer) = metadata.composer {
            tag.insert("COMPOSER".to_string(), composer.clone());
        }
        if let Some(ref comment) = metadata.comment {
            tag.insert("COMMENT".to_string(), comment.clone());
        }
        if let Some(ref lyrics) = metadata.lyrics {
            tag.insert("LYRICS".to_string(), lyrics.clone());
        }
        if let Some(ref copyright) = metadata.copyright {
            tag.insert("COPYRIGHT".to_string(), copyright.clone());
        }
        if let Some(compilation) = metadata.compilation {
            tag.insert(
                "COMPILATION".to_string(),
                if compilation { "1" } else { "0" }.to_string(),
            );
        }
        // Sort fields
        if let Some(ref title_sort) = metadata.title_sort {
            tag.insert("TITLESORT".to_string(), title_sort.clone());
        }
        if let Some(ref artist_sort) = metadata.artist_sort {
            tag.insert("ARTISTSORT".to_string(), artist_sort.clone());
        }
        if let Some(ref album_sort) = metadata.album_sort {
            tag.insert("ALBUMSORT".to_string(), album_sort.clone());
        }
        if let Some(ref album_artist_sort) = metadata.album_artist_sort {
            tag.insert("ALBUMARTISTSORT".to_string(), album_artist_sort.clone());
        }
        // MusicBrainz IDs
        if let Some(ref mb_recording_id) = metadata.mb_recording_id {
            tag.insert("MUSICBRAINZ_TRACKID".to_string(), mb_recording_id.clone());
        }
        if let Some(ref mb_album_id) = metadata.mb_album_id {
            tag.insert("MUSICBRAINZ_ALBUMID".to_string(), mb_album_id.clone());
        }
        if let Some(ref mb_artist_id) = metadata.mb_artist_id {
            tag.insert("MUSICBRAINZ_ARTISTID".to_string(), mb_artist_id.clone());
        }
        if let Some(ref mb_album_artist_id) = metadata.mb_album_artist_id {
            tag.insert(
                "MUSICBRAINZ_ALBUMARTISTID".to_string(),
                mb_album_artist_id.clone(),
            );
        }
        if let Some(ref mb_release_group_id) = metadata.mb_release_group_id {
            tag.insert(
                "MUSICBRAINZ_RELEASEGROUPID".to_string(),
                mb_release_group_id.clone(),
            );
        }
        // ReplayGain
        if let Some(gain) = metadata.replaygain_track_gain {
            tag.insert(
                "REPLAYGAIN_TRACK_GAIN".to_string(),
                format!("{:.2} dB", gain),
            );
        }
        if let Some(peak) = metadata.replaygain_track_peak {
            tag.insert("REPLAYGAIN_TRACK_PEAK".to_string(), format!("{:.6}", peak));
        }
        if let Some(gain) = metadata.replaygain_album_gain {
            tag.insert(
                "REPLAYGAIN_ALBUM_GAIN".to_string(),
                format!("{:.2} dB", gain),
            );
        }
        if let Some(peak) = metadata.replaygain_album_peak {
            tag.insert("REPLAYGAIN_ALBUM_PEAK".to_string(), format!("{:.6}", peak));
        }
        // Encoder
        if let Some(ref encoder) = metadata.encoder {
            tag.insert("ENCODER".to_string(), encoder.clone());
        }
        tag
    }
    /// Serialize Vorbis comments to bytes (without block header).
    /// Format: vendor_length (4 LE) + vendor + comment_count (4 LE) + comments
    fn serialize_vorbis_comments(tag: &VorbisComments) -> Vec<u8> {
        let vendor = tag.vendor();
        let vendor = if vendor.is_empty() { "musicfs" } else { vendor };
        let mut data = Vec::new();
        // Vendor string (little-endian length + UTF-8 string)
        let vendor_bytes = vendor.as_bytes();
        data.extend_from_slice(&(vendor_bytes.len() as u32).to_le_bytes());
        data.extend_from_slice(vendor_bytes);
        // Collect all comments
        let comments: Vec<_> = tag.items().collect();
        data.extend_from_slice(&(comments.len() as u32).to_le_bytes());
        for (key, value) in comments {
            let comment = format!("{}={}", key, value);
            let comment_bytes = comment.as_bytes();
            data.extend_from_slice(&(comment_bytes.len() as u32).to_le_bytes());
            data.extend_from_slice(comment_bytes);
        }
        data
    }
    /// Extract metadata from Vorbis comments tag.
    fn extract_from_vorbis_comments(tag: &VorbisComments) -> AudioMeta {
        let mut meta = AudioMeta::default();
        meta.format = AudioFormat::Flac;
        // Basic fields (using Accessor trait)
        meta.title = tag.title().map(|c: Cow<'_, str>| c.into_owned());
        meta.artist = tag.artist().map(|c: Cow<'_, str>| c.into_owned());
        meta.album = tag.album().map(|c: Cow<'_, str>| c.into_owned());
        meta.genre = tag.genre().map(|c: Cow<'_, str>| c.into_owned());
        // Album artist
        meta.album_artist = tag.get("ALBUMARTIST").map(String::from);
        // Date/Year
        meta.date = tag.get("DATE").map(String::from);
        if let Some(ref date) = meta.date {
            if let Some(year_str) = date.split('-').next() {
                meta.year = year_str.parse().ok();
            }
        }
        // Track/Disc numbers
        meta.track = tag.get("TRACKNUMBER").and_then(|s| s.parse().ok());
        meta.track_total = tag.get("TRACKTOTAL").and_then(|s| s.parse().ok());
        meta.disc = tag.get("DISCNUMBER").and_then(|s| s.parse().ok());
        meta.disc_total = tag.get("DISCTOTAL").and_then(|s| s.parse().ok());
        // Extended metadata
        meta.composer = tag.get("COMPOSER").map(String::from);
        meta.comment = tag.get("COMMENT").map(String::from);
        meta.lyrics = tag.get("LYRICS").map(String::from);
        meta.copyright = tag.get("COPYRIGHT").map(String::from);
        meta.compilation = tag
            .get("COMPILATION")
            .map(|s| s == "1" || s.eq_ignore_ascii_case("true"));
        // Sort fields
        meta.title_sort = tag.get("TITLESORT").map(String::from);
        meta.artist_sort = tag.get("ARTISTSORT").map(String::from);
        meta.album_sort = tag.get("ALBUMSORT").map(String::from);
        meta.album_artist_sort = tag.get("ALBUMARTISTSORT").map(String::from);
        // MusicBrainz IDs
        meta.mb_recording_id = tag.get("MUSICBRAINZ_TRACKID").map(String::from);
        meta.mb_album_id = tag.get("MUSICBRAINZ_ALBUMID").map(String::from);
        meta.mb_artist_id = tag.get("MUSICBRAINZ_ARTISTID").map(String::from);
        meta.mb_album_artist_id = tag.get("MUSICBRAINZ_ALBUMARTISTID").map(String::from);
        meta.mb_release_group_id = tag.get("MUSICBRAINZ_RELEASEGROUPID").map(String::from);
        // ReplayGain
        meta.replaygain_track_gain = tag
            .get("REPLAYGAIN_TRACK_GAIN")
            .and_then(|s| Self::parse_replaygain_value(s));
        meta.replaygain_track_peak = tag
            .get("REPLAYGAIN_TRACK_PEAK")
            .and_then(|s| s.parse().ok());
        meta.replaygain_album_gain = tag
            .get("REPLAYGAIN_ALBUM_GAIN")
            .and_then(|s| Self::parse_replaygain_value(s));
        meta.replaygain_album_peak = tag
            .get("REPLAYGAIN_ALBUM_PEAK")
            .and_then(|s| s.parse().ok());
        // Encoder
        meta.encoder = tag.get("ENCODER").map(String::from);
        meta
    }
    /// Parse ReplayGain value, stripping optional "dB" suffix.
    fn parse_replaygain_value(value: &str) -> Option<f32> {
        value
            .trim()
            .trim_end_matches(" dB")
            .trim_end_matches("dB")
            .parse()
            .ok()
    }
 }
 impl Default for FlacHandler {
    fn default() -> Self {
        Self::new()
    }
 }
 impl FormatHandler for FlacHandler {
    fn id(&self) -> &'static str {
        "flac"
    }
    fn name(&self) -> &'static str {
        "FLAC"
    }
    fn extensions(&self) -> &[&'static str] {
        &["flac"]
    }
    fn mime_types(&self) -> &[&'static str] {
        &["audio/flac", "audio/x-flac"]
    }
    fn analyze(&self, data: &[u8], file_size: u64) -> Result<FormatLayout, FormatError> {
        // Verify FLAC marker
        if data.len() < FLAC_MARKER.len() || &data[0..4] != FLAC_MARKER {
            return Err(FormatError::InvalidData("Not a FLAC file".to_string()));
        }
        let mut offset = FLAC_MARKER.len();
        let mut streaminfo_data: Option<Vec<u8>> = None;
        // Parse metadata blocks to find audio_start and extract STREAMINFO
        loop {
            if offset + BLOCK_HEADER_SIZE > data.len() {
                return Err(FormatError::InvalidData(
                    "Truncated FLAC metadata".to_string(),
                ));
            }
            let (is_last, block_type, block_size) = Self::parse_block_header(&data[offset..])
                .ok_or_else(|| FormatError::InvalidData("Invalid block header".to_string()))?;
            // Extract STREAMINFO block data (without header)
            if block_type == BLOCK_TYPE_STREAMINFO {
                if block_size != STREAMINFO_DATA_SIZE {
                    return Err(FormatError::InvalidData(format!(
                        "Invalid STREAMINFO size: {} (expected {})",
                        block_size, STREAMINFO_DATA_SIZE
                    )));
                }
                let data_start = offset + BLOCK_HEADER_SIZE;
                let data_end = data_start + block_size;
                if data_end > data.len() {
                    return Err(FormatError::InvalidData(
                        "Truncated STREAMINFO block".to_string(),
                    ));
                }
                streaminfo_data = Some(data[data_start..data_end].to_vec());
            }
            offset += BLOCK_HEADER_SIZE + block_size;
            if is_last {
                break;
            }
        }
        let streaminfo = streaminfo_data
            .ok_or_else(|| FormatError::InvalidData("Missing STREAMINFO block".to_string()))?;
        Ok(FormatLayout {
            audio_start: offset as u64,
            audio_end: file_size,
            format: AudioFormat::Flac,
            format_data: Some(streaminfo),
        })
    }
    fn synthesize(
        &self,
        metadata: &AudioMeta,
        layout: &FormatLayout,
    ) -> Result<Vec<u8>, FormatError> {
        // STREAMINFO must be preserved from original
        let streaminfo_data = layout.format_data.as_ref().ok_or_else(|| {
            FormatError::SynthesisFailed("Missing STREAMINFO data in layout".to_string())
        })?;
        if streaminfo_data.len() != STREAMINFO_DATA_SIZE {
            return Err(FormatError::SynthesisFailed(format!(
                "Invalid STREAMINFO size: {} (expected {})",
                streaminfo_data.len(),
                STREAMINFO_DATA_SIZE
            )));
        }
        // Build Vorbis comments
        let vorbis_tag = Self::build_vorbis_comments(metadata);
        let vorbis_data = Self::serialize_vorbis_comments(&vorbis_tag);
        // Calculate total header size
        let total_size =
            FLAC_MARKER.len() + STREAMINFO_BLOCK_SIZE + BLOCK_HEADER_SIZE + vorbis_data.len();
        let mut buffer = Vec::with_capacity(total_size);
        // Write FLAC marker
        buffer.extend_from_slice(FLAC_MARKER);
        // Write STREAMINFO block (not last)
        let streaminfo_header =
            Self::write_block_header(false, BLOCK_TYPE_STREAMINFO, STREAMINFO_DATA_SIZE);
        buffer.extend_from_slice(&streaminfo_header);
        buffer.extend_from_slice(streaminfo_data);
        // Write VORBIS_COMMENT block (last)
        let vorbis_header =
            Self::write_block_header(true, BLOCK_TYPE_VORBIS_COMMENT, vorbis_data.len());
        buffer.extend_from_slice(&vorbis_header);
        buffer.extend_from_slice(&vorbis_data);
        Ok(buffer)
    }
    fn extract(&self, data: &[u8]) -> Result<AudioMeta, FormatError> {
        let mut cursor = Cursor::new(data);
        let flac_file = FlacFile::read_from(&mut cursor, ParseOptions::new())
            .map_err(|e| FormatError::InvalidData(e.to_string()))?;
        let tag = flac_file
            .vorbis_comments()
            .ok_or_else(|| FormatError::InvalidData("No Vorbis comments found".to_string()))?;
        Ok(Self::extract_from_vorbis_comments(tag))
    }
    fn estimate_header_size(&self, _metadata: &AudioMeta) -> usize {
        // fLaC (4) + STREAMINFO (38) + VORBIS_COMMENT header (4) + typical comments (~4KB)
        8192
    }
 }
 #[cfg(test)]
 mod tests {
    use super::*;
    fn make_test_meta() -> AudioMeta {
        AudioMeta {
            title: Some("Test Title".to_string()),
            artist: Some("Test Artist".to_string()),
            album: Some("Test Album".to_string()),
            album_artist: Some("Test Album Artist".to_string()),
            genre: Some("Rock".to_string()),
            year: Some(2024),
            track: Some(5),
            track_total: Some(12),
            disc: Some(1),
            disc_total: Some(2),
            format: AudioFormat::Flac,
            date: Some("2024-03-15".to_string()),
            composer: Some("Test Composer".to_string()),
            comment: Some("Test Comment".to_string()),
            lyrics: Some("Test Lyrics\nLine 2".to_string()),
            copyright: Some("2024 Test Copyright".to_string()),
            compilation: Some(false),
            title_sort: Some("Title, Test".to_string()),
            artist_sort: Some("Artist, Test".to_string()),
            album_sort: Some("Album, Test".to_string()),
            album_artist_sort: Some("Album Artist, Test".to_string()),
            mb_recording_id: Some("rec-12345".to_string()),
            mb_album_id: Some("alb-12345".to_string()),
            mb_artist_id: Some("art-12345".to_string()),
            mb_album_artist_id: Some("albart-12345".to_string()),
            mb_release_group_id: Some("rg-12345".to_string()),
            replaygain_track_gain: Some(-6.5),
            replaygain_track_peak: Some(0.987654),
            replaygain_album_gain: Some(-5.2),
            replaygain_album_peak: Some(0.999999),
            encoder: Some("FLAC 1.4.0".to_string()),
            ..Default::default()
        }
    }
    /// Create a minimal valid FLAC file header for testing.
    fn make_minimal_flac_header() -> Vec<u8> {
        let mut data = Vec::new();
        // FLAC marker
        data.extend_from_slice(b"fLaC");
        // STREAMINFO block (last=true for minimal file)
        // Header: type=0 (STREAMINFO), last=1, size=34
        data.push(0x80); // 0x80 = last flag set, type 0
        data.push(0x00);
        data.push(0x00);
        data.push(0x22); // 34 bytes
        // STREAMINFO data (34 bytes) - minimal valid values
        // min_block_size (16 bits) = 4096
        data.push(0x10);
        data.push(0x00);
        // max_block_size (16 bits) = 4096
        data.push(0x10);
        data.push(0x00);
        // min_frame_size (24 bits) = 0 (unknown)
        data.push(0x00);
        data.push(0x00);
        data.push(0x00);
        // max_frame_size (24 bits) = 0 (unknown)
        data.push(0x00);
        data.push(0x00);
        data.push(0x00);
        // sample_rate (20 bits) = 44100, channels-1 (3 bits) = 1, bits-1 (5 bits) = 15
        // 44100 = 0xAC44, channels=2 (1), bits=16 (15)
        // Packed: SSSS SSSS SSSS SSSS SSSS CCCC CBBB BB
        // 0xAC44 << 12 | (1 << 9) | (15 << 4) = ...
        // Let's use simpler encoding:
        // Byte 0-1: sample_rate high 16 bits of 20
        // Byte 2: sample_rate low 4 bits | channels 3 bits | bits high 1 bit
        // Byte 3: bits low 4 bits | total_samples high 4 bits
        // Actually the format is:
        // 20 bits sample rate, 3 bits channels-1, 5 bits bits-1, 36 bits total samples
        // 44100 = 0x0AC44
        data.push(0x0A); // sample_rate bits 19-12
        data.push(0xC4); // sample_rate bits 11-4
        data.push(0x42); // sample_rate bits 3-0 (0x4), channels-1 (0x1=stereo), bits-1 high bit (0)
        data.push(0xF0); // bits-1 low 4 bits (0xF=15, so 16 bits), total_samples high 4 bits (0)
                         // total_samples (remaining 32 bits) = 0
        data.push(0x00);
        data.push(0x00);
        data.push(0x00);
        data.push(0x00);
        // MD5 signature (128 bits = 16 bytes)
        data.extend_from_slice(&[0u8; 16]);
        data
    }
    /// Create a FLAC header with Vorbis comments for testing extract().
    fn make_flac_with_vorbis_comments() -> Vec<u8> {
        let mut data = Vec::new();
        // FLAC marker
        data.extend_from_slice(b"fLaC");
        // STREAMINFO block (not last)
        data.push(0x00); // type=0, last=0
        data.push(0x00);
        data.push(0x00);
        data.push(0x22); // 34 bytes
        // STREAMINFO data (34 bytes)
        data.push(0x10);
        data.push(0x00);
        data.push(0x10);
        data.push(0x00);
        data.extend_from_slice(&[0u8; 6]); // frame sizes
        data.push(0x0A);
        data.push(0xC4);
        data.push(0x42);
        data.push(0xF0);
        data.extend_from_slice(&[0u8; 4]); // total samples
        data.extend_from_slice(&[0u8; 16]); // MD5
        // VORBIS_COMMENT block (last)
        // Vendor: "test"
        // Comments: TITLE=Test Song, ARTIST=Test Artist
        let vendor = b"test";
        let comments = [
            b"TITLE=Test Song".as_slice(),
            b"ARTIST=Test Artist".as_slice(),
            b"ALBUM=Test Album".as_slice(),
            b"TRACKNUMBER=3".as_slice(),
            b"REPLAYGAIN_TRACK_GAIN=-5.50 dB".as_slice(),
        ];
        let mut vorbis_data = Vec::new();
        // Vendor length (LE)
        vorbis_data.extend_from_slice(&(vendor.len() as u32).to_le_bytes());
        vorbis_data.extend_from_slice(vendor);
        // Comment count (LE)
        vorbis_data.extend_from_slice(&(comments.len() as u32).to_le_bytes());
        for comment in &comments {
            vorbis_data.extend_from_slice(&(comment.len() as u32).to_le_bytes());
            vorbis_data.extend_from_slice(*comment);
        }
        // VORBIS_COMMENT header
        data.push(0x84); // type=4, last=1
        data.push(((vorbis_data.len() >> 16) & 0xFF) as u8);
        data.push(((vorbis_data.len() >> 8) & 0xFF) as u8);
        data.push((vorbis_data.len() & 0xFF) as u8);
        data.extend_from_slice(&vorbis_data);
        data
    }
    #[test]
    fn test_id_and_name() {
        let handler = FlacHandler::new();
        assert_eq!(handler.id(), "flac");
        assert_eq!(handler.name(), "FLAC");
    }
    #[test]
    fn test_extensions_and_mime_types() {
        let handler = FlacHandler::new();
        assert_eq!(handler.extensions(), &["flac"]);
        assert_eq!(handler.mime_types(), &["audio/flac", "audio/x-flac"]);
    }
    #[test]
    fn test_estimate_header_size() {
        let handler = FlacHandler::new();
        let meta = AudioMeta::default();
        assert_eq!(handler.estimate_header_size(&meta), 8192);
    }
    #[test]
    fn test_analyze_valid_flac() {
        let handler = FlacHandler::new();
        let data = make_minimal_flac_header();
        let file_size = data.len() as u64 + 1000; // Pretend there's audio data
        let result = handler.analyze(&data, file_size);
        assert!(result.is_ok(), "analyze failed: {:?}", result.err());
        let layout = result.unwrap();
        assert_eq!(layout.audio_start, 42); // 4 (marker) + 38 (STREAMINFO)
        assert_eq!(layout.audio_end, file_size);
        assert_eq!(layout.format, AudioFormat::Flac);
        assert!(layout.format_data.is_some());
        assert_eq!(
            layout.format_data.as_ref().unwrap().len(),
            STREAMINFO_DATA_SIZE
        );
    }
    #[test]
    fn test_analyze_invalid_marker() {
        let handler = FlacHandler::new();
        let data = b"ID3\x04\x00\x00"; // MP3 header, not FLAC
        let result = handler.analyze(data, 1000);
        assert!(result.is_err());
        assert!(matches!(result.unwrap_err(), FormatError::InvalidData(_)));
    }
    #[test]
    fn test_analyze_truncated() {
        let handler = FlacHandler::new();
        let data = b"fLaC"; // Just the marker, no blocks
        let result = handler.analyze(data, 4);
        assert!(result.is_err());
    }
    #[test]
    fn test_synthesize_creates_valid_flac_header() {
        let handler = FlacHandler::new();
        let meta = make_test_meta();
        // Create layout with STREAMINFO
        let original_data = make_minimal_flac_header();
        let layout = handler
            .analyze(&original_data, original_data.len() as u64)
            .unwrap();
        let result = handler.synthesize(&meta, &layout);
        assert!(result.is_ok(), "synthesize failed: {:?}", result.err());
        let bytes = result.unwrap();
        // Verify FLAC marker
        assert!(bytes.len() >= 4);
        assert_eq!(&bytes[0..4], b"fLaC");
        // Verify STREAMINFO block header
        assert_eq!(bytes[4] & 0x7F, BLOCK_TYPE_STREAMINFO); // Type 0
        assert_eq!(bytes[4] & 0x80, 0); // Not last
        // Verify STREAMINFO size
        let streaminfo_size =
            ((bytes[5] as usize) << 16) | ((bytes[6] as usize) << 8) | (bytes[7] as usize);
        assert_eq!(streaminfo_size, STREAMINFO_DATA_SIZE);
        // Verify VORBIS_COMMENT block follows
        let vorbis_offset = 4 + 4 + STREAMINFO_DATA_SIZE;
        assert_eq!(bytes[vorbis_offset] & 0x7F, BLOCK_TYPE_VORBIS_COMMENT);
        assert_eq!(bytes[vorbis_offset] & 0x80, 0x80); // Is last
    }
    #[test]
    fn test_synthesize_preserves_streaminfo() {
        let handler = FlacHandler::new();
        let meta = AudioMeta::default();
        // Create layout with specific STREAMINFO
        let original_data = make_minimal_flac_header();
        let layout = handler
            .analyze(&original_data, original_data.len() as u64)
            .unwrap();
        let original_streaminfo = layout.format_data.as_ref().unwrap().clone();
        let synthesized = handler.synthesize(&meta, &layout).unwrap();
        // Extract STREAMINFO from synthesized header
        let streaminfo_start = 4 + 4; // After marker and header
        let streaminfo_end = streaminfo_start + STREAMINFO_DATA_SIZE;
        let synthesized_streaminfo = &synthesized[streaminfo_start..streaminfo_end];
        assert_eq!(synthesized_streaminfo, original_streaminfo.as_slice());
    }
    #[test]
    fn test_synthesize_missing_streaminfo() {
        let handler = FlacHandler::new();
        let meta = AudioMeta::default();
        let layout = FormatLayout {
            audio_start: 42,
            audio_end: 1000,
            format: AudioFormat::Flac,
            format_data: None, // Missing STREAMINFO
        };
        let result = handler.synthesize(&meta, &layout);
        assert!(result.is_err());
        assert!(matches!(
            result.unwrap_err(),
            FormatError::SynthesisFailed(_)
        ));
    }
    #[test]
    fn test_extract_from_flac() {
        let handler = FlacHandler::new();
        let data = make_flac_with_vorbis_comments();
        let result = handler.extract(&data);
        assert!(result.is_ok(), "extract failed: {:?}", result.err());
        let meta = result.unwrap();
        assert_eq!(meta.title, Some("Test Song".to_string()));
        assert_eq!(meta.artist, Some("Test Artist".to_string()));
        assert_eq!(meta.album, Some("Test Album".to_string()));
        assert_eq!(meta.track, Some(3));
        assert_eq!(meta.format, AudioFormat::Flac);
        // Check ReplayGain parsing
        let gain = meta.replaygain_track_gain.unwrap();
        assert!((gain - (-5.5)).abs() < 0.01);
    }
    #[test]
    fn test_build_and_extract_vorbis_comments() {
        let original_meta = make_test_meta();
        let tag = FlacHandler::build_vorbis_comments(&original_meta);
        let extracted = FlacHandler::extract_from_vorbis_comments(&tag);
        assert_eq!(extracted.title, original_meta.title);
        assert_eq!(extracted.artist, original_meta.artist);
        assert_eq!(extracted.album, original_meta.album);
        assert_eq!(extracted.album_artist, original_meta.album_artist);
        assert_eq!(extracted.genre, original_meta.genre);
        assert_eq!(extracted.track, original_meta.track);
        assert_eq!(extracted.track_total, original_meta.track_total);
        assert_eq!(extracted.disc, original_meta.disc);
        assert_eq!(extracted.disc_total, original_meta.disc_total);
        assert_eq!(extracted.composer, original_meta.composer);
        assert_eq!(extracted.comment, original_meta.comment);
        assert_eq!(extracted.lyrics, original_meta.lyrics);
        assert_eq!(extracted.copyright, original_meta.copyright);
        assert_eq!(extracted.compilation, original_meta.compilation);
        assert_eq!(extracted.title_sort, original_meta.title_sort);
        assert_eq!(extracted.artist_sort, original_meta.artist_sort);
        assert_eq!(extracted.album_sort, original_meta.album_sort);
        assert_eq!(extracted.album_artist_sort, original_meta.album_artist_sort);
        assert_eq!(extracted.mb_recording_id, original_meta.mb_recording_id);
        assert_eq!(extracted.mb_album_id, original_meta.mb_album_id);
        assert_eq!(extracted.mb_artist_id, original_meta.mb_artist_id);
        assert_eq!(
            extracted.mb_album_artist_id,
            original_meta.mb_album_artist_id
        );
        assert_eq!(
            extracted.mb_release_group_id,
            original_meta.mb_release_group_id
        );
        assert_eq!(extracted.encoder, original_meta.encoder);
        // ReplayGain values (with tolerance for formatting)
        let orig_track_gain = original_meta.replaygain_track_gain.unwrap();
        let ext_track_gain = extracted.replaygain_track_gain.unwrap();
        assert!((orig_track_gain - ext_track_gain).abs() < 0.01);
        let orig_track_peak = original_meta.replaygain_track_peak.unwrap();
        let ext_track_peak = extracted.replaygain_track_peak.unwrap();
        assert!((orig_track_peak - ext_track_peak).abs() < 0.0001);
    }
    #[test]
    fn test_parse_replaygain_value() {
        assert_eq!(FlacHandler::parse_replaygain_value("-6.50 dB"), Some(-6.50));
        assert_eq!(FlacHandler::parse_replaygain_value("-6.50dB"), Some(-6.50));
        assert_eq!(FlacHandler::parse_replaygain_value("-6.50"), Some(-6.50));
        assert_eq!(FlacHandler::parse_replaygain_value("  3.2 dB  "), Some(3.2));
        assert_eq!(FlacHandler::parse_replaygain_value("invalid"), None);
    }
    #[test]
    fn test_parse_block_header() {
        // Not last, type 0, size 34
        let header = [0x00, 0x00, 0x00, 0x22];
        let (is_last, block_type, size) = FlacHandler::parse_block_header(&header).unwrap();
        assert!(!is_last);
        assert_eq!(block_type, 0);
        assert_eq!(size, 34);
        // Last, type 4, size 256
        let header = [0x84, 0x00, 0x01, 0x00];
        let (is_last, block_type, size) = FlacHandler::parse_block_header(&header).unwrap();
        assert!(is_last);
        assert_eq!(block_type, 4);
        assert_eq!(size, 256);
    }
    #[test]
    fn test_write_block_header() {
        let header = FlacHandler::write_block_header(false, 0, 34);
        assert_eq!(header, [0x00, 0x00, 0x00, 0x22]);
        let header = FlacHandler::write_block_header(true, 4, 256);
        assert_eq!(header, [0x84, 0x00, 0x01, 0x00]);
    }
    #[test]
    fn test_empty_metadata_produces_minimal_vorbis() {
        let handler = FlacHandler::new();
        let meta = AudioMeta::default();
        let original_data = make_minimal_flac_header();
        let layout = handler
            .analyze(&original_data, original_data.len() as u64)
            .unwrap();
        let result = handler.synthesize(&meta, &layout);
        assert!(result.is_ok());
        let bytes = result.unwrap();
        // Should have: fLaC (4) + STREAMINFO (38) + VORBIS_COMMENT (header + minimal data)
        assert!(bytes.len() >= 42 + 4 + 8); // At least vendor string overhead
    }
    #[test]
    fn test_round_trip_synthesize_analyze() {
        let handler = FlacHandler::new();
        let meta = make_test_meta();
        // Create initial layout
        let original_data = make_minimal_flac_header();
        let layout = handler
            .analyze(&original_data, original_data.len() as u64)
            .unwrap();
        // Synthesize new header
        let synthesized = handler.synthesize(&meta, &layout).unwrap();
        // Analyze synthesized header
        let new_layout = handler
            .analyze(&synthesized, synthesized.len() as u64)
            .unwrap();
        // STREAMINFO should be preserved
        assert_eq!(new_layout.format_data, layout.format_data);
        assert_eq!(new_layout.format, AudioFormat::Flac);
    }
 }
@@ -1,631 +0,0 @@
 use crate::{FormatError, FormatHandler, FormatLayout};
 use lofty::config::{ParseOptions, WriteOptions};
 use lofty::file::AudioFile;
 use lofty::id3::v2::{
    CommentFrame, Frame, FrameId, Id3v2Tag, TextInformationFrame, UnsynchronizedTextFrame,
 };
 use lofty::mpeg::MpegFile;
 use lofty::tag::{Accessor, TagExt};
 use lofty::TextEncoding;
 use musicfs_core::{AudioFormat, AudioMeta};
 use std::borrow::Cow;
 use std::io::Cursor;
 const ID3V2_HEADER_SIZE: usize = 10;
 const ID3V1_TAG_SIZE: usize = 128;
 pub struct Id3v2Handler;
 impl Id3v2Handler {
    pub fn new() -> Self {
        Self
    }
    fn parse_id3v2_header(data: &[u8]) -> Option<usize> {
        if data.len() < ID3V2_HEADER_SIZE {
            return None;
        }
        if &data[0..3] != b"ID3" {
            return None;
        }
        let size = syncsafe_decode(&data[6..10]);
        Some(ID3V2_HEADER_SIZE + size)
    }
    fn has_id3v1_tag(data: &[u8], file_size: u64) -> bool {
        if file_size < ID3V1_TAG_SIZE as u64 {
            return false;
        }
        let tag_start = (file_size as usize).saturating_sub(ID3V1_TAG_SIZE);
        if tag_start >= data.len() {
            return false;
        }
        &data[tag_start..tag_start + 3] == b"TAG"
    }
    fn set_text_frame(tag: &mut Id3v2Tag, frame_id: &'static str, value: &str) {
        let id = FrameId::Valid(Cow::Borrowed(frame_id));
        let frame = Frame::Text(TextInformationFrame::new(
            id,
            TextEncoding::UTF8,
            value.to_string(),
        ));
        tag.insert(frame);
    }
    fn set_track_disc_frame(
        tag: &mut Id3v2Tag,
        frame_id: &'static str,
        num: u32,
        total: Option<u32>,
    ) {
        let value = match total {
            Some(t) => format!("{}/{}", num, t),
            None => num.to_string(),
        };
        Self::set_text_frame(tag, frame_id, &value);
    }
    fn set_comment_frame(tag: &mut Id3v2Tag, value: &str) {
        let frame = Frame::Comment(CommentFrame::new(
            TextEncoding::UTF8,
            *b"eng",
            String::new(),
            value.to_string(),
        ));
        tag.insert(frame);
    }
    fn set_lyrics_frame(tag: &mut Id3v2Tag, value: &str) {
        let frame = Frame::UnsynchronizedText(UnsynchronizedTextFrame::new(
            TextEncoding::UTF8,
            *b"eng",
            String::new(),
            value.to_string(),
        ));
        tag.insert(frame);
    }
    fn build_tag_from_meta(metadata: &AudioMeta) -> Id3v2Tag {
        let mut tag = Id3v2Tag::new();
        if let Some(ref title) = metadata.title {
            tag.set_title(title.clone());
        }
        if let Some(ref artist) = metadata.artist {
            tag.set_artist(artist.clone());
        }
        if let Some(ref album) = metadata.album {
            tag.set_album(album.clone());
        }
        if let Some(ref album_artist) = metadata.album_artist {
            Self::set_text_frame(&mut tag, "TPE2", album_artist);
        }
        if let Some(year) = metadata.year {
            Self::set_text_frame(&mut tag, "TDRC", &year.to_string());
        }
        if let Some(ref genre) = metadata.genre {
            tag.set_genre(genre.clone());
        }
        if let Some(track) = metadata.track {
            Self::set_track_disc_frame(&mut tag, "TRCK", track, metadata.track_total);
        }
        if let Some(disc) = metadata.disc {
            Self::set_track_disc_frame(&mut tag, "TPOS", disc, metadata.disc_total);
        }
        if let Some(ref date) = metadata.date {
            Self::set_text_frame(&mut tag, "TDRC", date);
        }
        if let Some(ref composer) = metadata.composer {
            Self::set_text_frame(&mut tag, "TCOM", composer);
        }
        if let Some(ref comment) = metadata.comment {
            Self::set_comment_frame(&mut tag, comment);
        }
        if let Some(ref lyrics) = metadata.lyrics {
            Self::set_lyrics_frame(&mut tag, lyrics);
        }
        if let Some(ref copyright) = metadata.copyright {
            Self::set_text_frame(&mut tag, "TCOP", copyright);
        }
        if let Some(compilation) = metadata.compilation {
            Self::set_text_frame(&mut tag, "TCMP", if compilation { "1" } else { "0" });
        }
        if let Some(ref title_sort) = metadata.title_sort {
            Self::set_text_frame(&mut tag, "TSOT", title_sort);
        }
        if let Some(ref artist_sort) = metadata.artist_sort {
            Self::set_text_frame(&mut tag, "TSOP", artist_sort);
        }
        if let Some(ref album_sort) = metadata.album_sort {
            Self::set_text_frame(&mut tag, "TSOA", album_sort);
        }
        if let Some(ref album_artist_sort) = metadata.album_artist_sort {
            Self::set_text_frame(&mut tag, "TSO2", album_artist_sort);
        }
        if let Some(ref mb_recording_id) = metadata.mb_recording_id {
            tag.insert_user_text(
                "MusicBrainz Recording Id".to_string(),
                mb_recording_id.clone(),
            );
        }
        if let Some(ref mb_album_id) = metadata.mb_album_id {
            tag.insert_user_text("MusicBrainz Album Id".to_string(), mb_album_id.clone());
        }
        if let Some(ref mb_artist_id) = metadata.mb_artist_id {
            tag.insert_user_text("MusicBrainz Artist Id".to_string(), mb_artist_id.clone());
        }
        if let Some(ref mb_album_artist_id) = metadata.mb_album_artist_id {
            tag.insert_user_text(
                "MusicBrainz Album Artist Id".to_string(),
                mb_album_artist_id.clone(),
            );
        }
        if let Some(ref mb_release_group_id) = metadata.mb_release_group_id {
            tag.insert_user_text(
                "MusicBrainz Release Group Id".to_string(),
                mb_release_group_id.clone(),
            );
        }
        if let Some(gain) = metadata.replaygain_track_gain {
            tag.insert_user_text(
                "REPLAYGAIN_TRACK_GAIN".to_string(),
                format!("{:.2} dB", gain),
            );
        }
        if let Some(peak) = metadata.replaygain_track_peak {
            tag.insert_user_text("REPLAYGAIN_TRACK_PEAK".to_string(), format!("{:.6}", peak));
        }
        if let Some(gain) = metadata.replaygain_album_gain {
            tag.insert_user_text(
                "REPLAYGAIN_ALBUM_GAIN".to_string(),
                format!("{:.2} dB", gain),
            );
        }
        if let Some(peak) = metadata.replaygain_album_peak {
            tag.insert_user_text("REPLAYGAIN_ALBUM_PEAK".to_string(), format!("{:.6}", peak));
        }
        if let Some(ref encoder) = metadata.encoder {
            Self::set_text_frame(&mut tag, "TSSE", encoder);
        }
        tag
    }
    fn extract_text_frame(tag: &Id3v2Tag, frame_id: &str) -> Option<String> {
        let id = FrameId::new(frame_id).ok()?;
        tag.get_text(&id).map(|s| s.to_string())
    }
    fn parse_track_disc(value: &str) -> (Option<u32>, Option<u32>) {
        let parts: Vec<&str> = value.split('/').collect();
        let num = parts.first().and_then(|s| s.parse().ok());
        let total = parts.get(1).and_then(|s| s.parse().ok());
        (num, total)
    }
    fn parse_replaygain_value(value: &str) -> Option<f32> {
        value
            .trim()
            .trim_end_matches(" dB")
            .trim_end_matches("dB")
            .parse()
            .ok()
    }
    fn extract_from_tag(tag: &Id3v2Tag) -> AudioMeta {
        let mut meta = AudioMeta::default();
        meta.format = AudioFormat::Mp3;
        meta.title = tag.title().map(|c: Cow<'_, str>| c.into_owned());
        meta.artist = tag.artist().map(|c: Cow<'_, str>| c.into_owned());
        meta.album = tag.album().map(|c: Cow<'_, str>| c.into_owned());
        meta.album_artist = Self::extract_text_frame(tag, "TPE2");
        meta.genre = tag.genre().map(|c: Cow<'_, str>| c.into_owned());
        if let Some(track_str) = Self::extract_text_frame(tag, "TRCK") {
            let (track, track_total) = Self::parse_track_disc(&track_str);
            meta.track = track;
            meta.track_total = track_total;
        } else {
            meta.track = tag.track();
            meta.track_total = tag.track_total();
        }
        if let Some(disc_str) = Self::extract_text_frame(tag, "TPOS") {
            let (disc, disc_total) = Self::parse_track_disc(&disc_str);
            meta.disc = disc;
            meta.disc_total = disc_total;
        } else {
            meta.disc = tag.disk();
            meta.disc_total = tag.disk_total();
        }
        meta.date = Self::extract_text_frame(tag, "TDRC");
        if let Some(ref date) = meta.date {
            if let Some(year_str) = date.split('-').next() {
                meta.year = year_str.parse().ok();
            }
        }
        meta.composer = Self::extract_text_frame(tag, "TCOM");
        meta.comment = tag.comment().map(|c: Cow<'_, str>| c.into_owned());
        if let Some(uslt) = tag.unsync_text().next() {
            meta.lyrics = Some(uslt.content.to_string());
        }
        meta.copyright = Self::extract_text_frame(tag, "TCOP");
        if let Some(tcmp) = Self::extract_text_frame(tag, "TCMP") {
            meta.compilation = Some(tcmp == "1");
        }
        meta.title_sort = Self::extract_text_frame(tag, "TSOT");
        meta.artist_sort = Self::extract_text_frame(tag, "TSOP");
        meta.album_sort = Self::extract_text_frame(tag, "TSOA");
        meta.album_artist_sort = Self::extract_text_frame(tag, "TSO2");
        meta.mb_recording_id = tag
            .get_user_text("MusicBrainz Recording Id")
            .map(String::from);
        meta.mb_album_id = tag.get_user_text("MusicBrainz Album Id").map(String::from);
        meta.mb_artist_id = tag.get_user_text("MusicBrainz Artist Id").map(String::from);
        meta.mb_album_artist_id = tag
            .get_user_text("MusicBrainz Album Artist Id")
            .map(String::from);
        meta.mb_release_group_id = tag
            .get_user_text("MusicBrainz Release Group Id")
            .map(String::from);
        if let Some(gain_str) = tag.get_user_text("REPLAYGAIN_TRACK_GAIN") {
            meta.replaygain_track_gain = Self::parse_replaygain_value(gain_str);
        }
        if let Some(peak_str) = tag.get_user_text("REPLAYGAIN_TRACK_PEAK") {
            meta.replaygain_track_peak = peak_str.parse::<f32>().ok();
        }
        if let Some(gain_str) = tag.get_user_text("REPLAYGAIN_ALBUM_GAIN") {
            meta.replaygain_album_gain = Self::parse_replaygain_value(gain_str);
        }
        if let Some(peak_str) = tag.get_user_text("REPLAYGAIN_ALBUM_PEAK") {
            meta.replaygain_album_peak = peak_str.parse::<f32>().ok();
        }
        meta.encoder = Self::extract_text_frame(tag, "TSSE");
        meta
    }
 }
 impl Default for Id3v2Handler {
    fn default() -> Self {
        Self::new()
    }
 }
 impl FormatHandler for Id3v2Handler {
    fn id(&self) -> &'static str {
        "id3v2"
    }
    fn name(&self) -> &'static str {
        "ID3v2 (MP3)"
    }
    fn extensions(&self) -> &[&'static str] {
        &["mp3"]
    }
    fn mime_types(&self) -> &[&'static str] {
        &["audio/mpeg"]
    }
    fn analyze(&self, data: &[u8], file_size: u64) -> Result<FormatLayout, FormatError> {
        let audio_start = Self::parse_id3v2_header(data).unwrap_or(0) as u64;
        let audio_end = if Self::has_id3v1_tag(data, file_size) {
            file_size - ID3V1_TAG_SIZE as u64
        } else {
            file_size
        };
        Ok(FormatLayout {
            audio_start,
            audio_end,
            format: AudioFormat::Mp3,
            format_data: None,
        })
    }
    fn synthesize(
        &self,
        metadata: &AudioMeta,
        _layout: &FormatLayout,
    ) -> Result<Vec<u8>, FormatError> {
        let tag = Self::build_tag_from_meta(metadata);
        let mut buffer = Cursor::new(Vec::new());
        let write_options = WriteOptions::new().preferred_padding(1024);
        tag.dump_to(&mut buffer, write_options)
            .map_err(|e| FormatError::SynthesisFailed(e.to_string()))?;
        Ok(buffer.into_inner())
    }
    fn extract(&self, data: &[u8]) -> Result<AudioMeta, FormatError> {
        let mut cursor = Cursor::new(data);
        let mpeg_file = MpegFile::read_from(&mut cursor, ParseOptions::new())
            .map_err(|e| FormatError::InvalidData(e.to_string()))?;
        let tag = mpeg_file
            .id3v2()
            .ok_or_else(|| FormatError::InvalidData("No ID3v2 tag found".to_string()))?;
        Ok(Self::extract_from_tag(tag))
    }
    fn estimate_header_size(&self, _metadata: &AudioMeta) -> usize {
        4096 + 1024
    }
 }
 fn syncsafe_decode(bytes: &[u8]) -> usize {
    ((bytes[0] as usize) << 21)
        | ((bytes[1] as usize) << 14)
        | ((bytes[2] as usize) << 7)
        | (bytes[3] as usize)
 }
 #[cfg(test)]
 mod tests {
    use super::*;
    fn make_test_meta() -> AudioMeta {
        AudioMeta {
            title: Some("Test Title".to_string()),
            artist: Some("Test Artist".to_string()),
            album: Some("Test Album".to_string()),
            album_artist: Some("Test Album Artist".to_string()),
            genre: Some("Rock".to_string()),
            year: Some(2024),
            track: Some(5),
            track_total: Some(12),
            disc: Some(1),
            disc_total: Some(2),
            format: AudioFormat::Mp3,
            date: Some("2024-03-15".to_string()),
            composer: Some("Test Composer".to_string()),
            comment: Some("Test Comment".to_string()),
            lyrics: Some("Test Lyrics\nLine 2".to_string()),
            copyright: Some("2024 Test Copyright".to_string()),
            compilation: Some(false),
            title_sort: Some("Title, Test".to_string()),
            artist_sort: Some("Artist, Test".to_string()),
            album_sort: Some("Album, Test".to_string()),
            album_artist_sort: Some("Album Artist, Test".to_string()),
            mb_recording_id: Some("rec-12345".to_string()),
            mb_album_id: Some("alb-12345".to_string()),
            mb_artist_id: Some("art-12345".to_string()),
            mb_album_artist_id: Some("albart-12345".to_string()),
            mb_release_group_id: Some("rg-12345".to_string()),
            replaygain_track_gain: Some(-6.5),
            replaygain_track_peak: Some(0.987654),
            replaygain_album_gain: Some(-5.2),
            replaygain_album_peak: Some(0.999999),
            encoder: Some("LAME 3.100".to_string()),
            ..Default::default()
        }
    }
    #[test]
    fn test_id_and_name() {
        let handler = Id3v2Handler::new();
        assert_eq!(handler.id(), "id3v2");
        assert_eq!(handler.name(), "ID3v2 (MP3)");
    }
    #[test]
    fn test_extensions_and_mime_types() {
        let handler = Id3v2Handler::new();
        assert_eq!(handler.extensions(), &["mp3"]);
        assert_eq!(handler.mime_types(), &["audio/mpeg"]);
    }
    #[test]
    fn test_estimate_header_size() {
        let handler = Id3v2Handler::new();
        let meta = AudioMeta::default();
        assert_eq!(handler.estimate_header_size(&meta), 5120);
    }
    #[test]
    fn test_synthesize_creates_valid_id3v2() {
        let handler = Id3v2Handler::new();
        let meta = make_test_meta();
        let layout = FormatLayout {
            audio_start: 0,
            audio_end: 1000,
            format: AudioFormat::Mp3,
            format_data: None,
        };
        let result = handler.synthesize(&meta, &layout);
        assert!(result.is_ok());
        let bytes = result.unwrap();
        assert!(bytes.len() >= 10);
        assert_eq!(&bytes[0..3], b"ID3");
        assert_eq!(bytes[3], 0x04);
    }
    #[test]
    fn test_analyze_no_id3v2() {
        let handler = Id3v2Handler::new();
        let data = vec![0xFF, 0xFB, 0x90, 0x00];
        let file_size = 1000;
        let result = handler.analyze(&data, file_size);
        assert!(result.is_ok());
        let layout = result.unwrap();
        assert_eq!(layout.audio_start, 0);
        assert_eq!(layout.audio_end, 1000);
        assert_eq!(layout.format, AudioFormat::Mp3);
    }
    #[test]
    fn test_analyze_with_id3v2() {
        let handler = Id3v2Handler::new();
        let mut data = vec![b'I', b'D', b'3', 0x04, 0x00, 0x00, 0x00, 0x00, 0x00, 0x64];
        data.extend(vec![0u8; 100]);
        let file_size = data.len() as u64;
        let result = handler.analyze(&data, file_size);
        assert!(result.is_ok());
        let layout = result.unwrap();
        assert_eq!(layout.audio_start, 110);
        assert_eq!(layout.audio_end, file_size);
    }
    #[test]
    fn test_analyze_with_id3v1() {
        let handler = Id3v2Handler::new();
        let mut data = vec![0xFF, 0xFB, 0x90, 0x00];
        data.extend(vec![0u8; 100]);
        data.extend(b"TAG");
        data.extend(vec![0u8; 125]);
        let file_size = data.len() as u64;
        let result = handler.analyze(&data, file_size);
        assert!(result.is_ok());
        let layout = result.unwrap();
        assert_eq!(layout.audio_start, 0);
        assert_eq!(layout.audio_end, file_size - 128);
    }
    #[test]
    fn test_syncsafe_decode() {
        assert_eq!(syncsafe_decode(&[0x00, 0x00, 0x00, 0x7F]), 127);
        assert_eq!(syncsafe_decode(&[0x00, 0x00, 0x01, 0x00]), 128);
        assert_eq!(syncsafe_decode(&[0x00, 0x00, 0x00, 0x64]), 100);
    }
    #[test]
    fn test_parse_track_disc() {
        assert_eq!(Id3v2Handler::parse_track_disc("5/12"), (Some(5), Some(12)));
        assert_eq!(Id3v2Handler::parse_track_disc("5"), (Some(5), None));
        assert_eq!(Id3v2Handler::parse_track_disc(""), (None, None));
    }
    #[test]
    fn test_parse_replaygain_value() {
        assert_eq!(
            Id3v2Handler::parse_replaygain_value("-6.50 dB"),
            Some(-6.50)
        );
        assert_eq!(Id3v2Handler::parse_replaygain_value("-6.50dB"), Some(-6.50));
        assert_eq!(Id3v2Handler::parse_replaygain_value("-6.50"), Some(-6.50));
        assert_eq!(Id3v2Handler::parse_replaygain_value("invalid"), None);
    }
    #[test]
    fn test_empty_metadata_produces_empty_tag() {
        let handler = Id3v2Handler::new();
        let meta = AudioMeta::default();
        let layout = FormatLayout {
            audio_start: 0,
            audio_end: 1000,
            format: AudioFormat::Mp3,
            format_data: None,
        };
        let result = handler.synthesize(&meta, &layout);
        assert!(result.is_ok());
        let bytes = result.unwrap();
        assert!(bytes.is_empty());
    }
    #[test]
    fn test_minimal_metadata_produces_valid_tag() {
        let handler = Id3v2Handler::new();
        let mut meta = AudioMeta::default();
        meta.title = Some("Test".to_string());
        let layout = FormatLayout {
            audio_start: 0,
            audio_end: 1000,
            format: AudioFormat::Mp3,
            format_data: None,
        };
        let result = handler.synthesize(&meta, &layout);
        assert!(result.is_ok());
        let bytes = result.unwrap();
        assert!(bytes.len() >= 10);
        assert_eq!(&bytes[0..3], b"ID3");
        assert_eq!(bytes[3], 0x04);
    }
    #[test]
    fn test_build_and_extract_tag() {
        let original_meta = make_test_meta();
        let tag = Id3v2Handler::build_tag_from_meta(&original_meta);
        let extracted = Id3v2Handler::extract_from_tag(&tag);
        assert_eq!(extracted.title, original_meta.title);
        assert_eq!(extracted.artist, original_meta.artist);
        assert_eq!(extracted.album, original_meta.album);
        assert_eq!(extracted.album_artist, original_meta.album_artist);
        assert_eq!(extracted.genre, original_meta.genre);
        assert_eq!(extracted.track, original_meta.track);
        assert_eq!(extracted.track_total, original_meta.track_total);
        assert_eq!(extracted.disc, original_meta.disc);
        assert_eq!(extracted.disc_total, original_meta.disc_total);
        assert_eq!(extracted.composer, original_meta.composer);
        assert_eq!(extracted.comment, original_meta.comment);
        assert_eq!(extracted.lyrics, original_meta.lyrics);
        assert_eq!(extracted.copyright, original_meta.copyright);
        assert_eq!(extracted.compilation, original_meta.compilation);
        assert_eq!(extracted.title_sort, original_meta.title_sort);
        assert_eq!(extracted.artist_sort, original_meta.artist_sort);
        assert_eq!(extracted.album_sort, original_meta.album_sort);
        assert_eq!(extracted.album_artist_sort, original_meta.album_artist_sort);
        assert_eq!(extracted.mb_recording_id, original_meta.mb_recording_id);
        assert_eq!(extracted.mb_album_id, original_meta.mb_album_id);
        assert_eq!(extracted.mb_artist_id, original_meta.mb_artist_id);
        assert_eq!(
            extracted.mb_album_artist_id,
            original_meta.mb_album_artist_id
        );
        assert_eq!(
            extracted.mb_release_group_id,
            original_meta.mb_release_group_id
        );
        assert_eq!(extracted.encoder, original_meta.encoder);
        let orig_track_gain = original_meta.replaygain_track_gain.unwrap();
        let ext_track_gain = extracted.replaygain_track_gain.unwrap();
        assert!((orig_track_gain - ext_track_gain).abs() < 0.01);
        let orig_track_peak = original_meta.replaygain_track_peak.unwrap();
        let ext_track_peak = extracted.replaygain_track_peak.unwrap();
        assert!((orig_track_peak - ext_track_peak).abs() < 0.0001);
    }
 }
@@ -1,12 +0,0 @@
 //! Format-specific metadata handlers for audio file synthesis.
 //!
 //! Each handler implements the `FormatHandler` trait to support:
 //! - Analyzing original files to find audio boundaries
 //! - Synthesizing new headers from database metadata
 //! - Extracting metadata from existing files
 mod flac;
 mod id3v2;
 pub use flac::FlacHandler;
 pub use id3v2::Id3v2Handler;
@@ -1,26 +0,0 @@
 mod artwork;
 mod db;
 mod eviction;
 mod format_handler;
 mod format_layout;
 pub mod handlers;
 mod metadata;
 mod overlay;
 mod patterns;
 mod prefetch;
 mod tree;
 pub use artwork::{ArtworkCache, ArtworkError, CachedArtwork};
 pub use db::{Database, EnrichmentUpdate, TrashedFile, TrashedFilter};
 pub use eviction::{EvictionError, EvictionPolicy, LruEviction};
 pub use format_handler::{FormatError, FormatHandler, FormatHandlerRegistry};
 pub use format_layout::FormatLayout;
 pub use handlers::{FlacHandler, Id3v2Handler};
 pub use metadata::MetadataCache;
 pub use overlay::{OverlayError, OverlayReader};
 pub use patterns::{AccessContext, AccessPattern, PatternError, PatternStore};
 pub use prefetch::{PrefetchConfig, PrefetchEngine, PrefetchHandle};
 pub use tree::{
    DirNode, FileNode, Inode, RefreshPolicy, RemoveError, RenameError, TreeBuilder, VirtualNode,
    VirtualTree, ROOT_INODE,
 };
@@ -1,138 +0,0 @@
 use crate::db::Database;
 use musicfs_core::{AudioMeta, FileMeta, OriginId, Result, VirtualPath};
 use std::path::Path;
 use std::sync::Arc;
 use std::time::{Duration, SystemTime, UNIX_EPOCH};
 use tracing::trace;
 pub struct MetadataCache {
    db: Arc<Database>,
 }
 impl MetadataCache {
    pub fn new(db: Arc<Database>) -> Self {
        Self { db }
    }
    pub fn store(
        &self,
        origin_id: &OriginId,
        real_path: &Path,
        virtual_path: &VirtualPath,
        audio_meta: &AudioMeta,
        origin_mtime: SystemTime,
        origin_size: u64,
    ) -> Result<()> {
        self.db.upsert_file(
            origin_id,
            real_path,
            virtual_path,
            audio_meta,
            origin_mtime,
            origin_size,
        )?;
        Ok(())
    }
    pub fn lookup(&self, path: &VirtualPath) -> Result<Option<FileMeta>> {
        let result = self.db.get_file_by_virtual_path(path)?;
        let hit = result.is_some();
        trace!(path = path.as_str(), hit, "metadata cache lookup");
        Ok(result)
    }
    pub fn is_fresh(
        &self,
        origin_id: &OriginId,
        real_path: &Path,
        current_mtime: SystemTime,
    ) -> Result<bool> {
        if let Some(cached_mtime) = self.db.get_mtime_by_real_path(origin_id, real_path)? {
            let current_secs = current_mtime
                .duration_since(UNIX_EPOCH)
                .unwrap_or(Duration::ZERO)
                .as_secs();
            let cached_secs = cached_mtime
                .duration_since(UNIX_EPOCH)
                .unwrap_or(Duration::ZERO)
                .as_secs();
            let hit = current_secs == cached_secs;
            trace!(path = ?real_path, hit, "metadata freshness check");
            Ok(hit)
        } else {
            trace!(path = ?real_path, hit = false, "metadata freshness check");
            Ok(false)
        }
    }
    pub fn invalidate(&self, path: &VirtualPath) -> Result<()> {
        if let Some(meta) = self.db.get_file_by_virtual_path(path)? {
            self.db.delete_file(meta.id)?;
        }
        Ok(())
    }
 }
 #[cfg(test)]
 mod tests {
    use super::*;
    use musicfs_core::AudioFormat;
    #[test]
    fn test_metadata_cache_store_and_lookup() {
        let db = Arc::new(Database::open_memory().unwrap());
        let cache = MetadataCache::new(db);
        let origin_id = OriginId::from("local");
        let real_path = Path::new("/music/song.flac");
        let virtual_path = VirtualPath::new("/Artist/Album/Song.flac");
        let meta = AudioMeta {
            title: Some("Song".to_string()),
            artist: Some("Artist".to_string()),
            format: AudioFormat::Flac,
            ..Default::default()
        };
        cache
            .store(
                &origin_id,
                real_path,
                &virtual_path,
                &meta,
                UNIX_EPOCH,
                5000,
            )
            .unwrap();
        let retrieved = cache.lookup(&virtual_path).unwrap().unwrap();
        assert_eq!(
            retrieved.audio.as_ref().unwrap().title,
            Some("Song".to_string())
        );
    }
    #[test]
    fn test_metadata_cache_invalidate() {
        let db = Arc::new(Database::open_memory().unwrap());
        let cache = MetadataCache::new(db);
        let virtual_path = VirtualPath::new("/Test.flac");
        cache
            .store(
                &OriginId::from("local"),
                Path::new("/test.flac"),
                &virtual_path,
                &AudioMeta::default(),
                UNIX_EPOCH,
                100,
            )
            .unwrap();
        assert!(cache.lookup(&virtual_path).unwrap().is_some());
        cache.invalidate(&virtual_path).unwrap();
        assert!(cache.lookup(&virtual_path).unwrap().is_none());
    }
 }
@@ -1,467 +0,0 @@
 //! OverlayReader: On-the-fly metadata overlay with header/audio splice logic.
 //!
 //! This module provides the core read path for metadata overlay. It synthesizes
 //! headers on-the-fly from database metadata and splices them with original audio
 //! data from the CAS.
 use crate::{Database, FormatError, FormatHandlerRegistry};
 use bytes::{Bytes, BytesMut};
 use musicfs_cas::{FileReader, ReaderError};
 use musicfs_core::{AudioFormat, FileId};
 use std::sync::Arc;
 use tracing::{debug, trace};
 /// Error types for overlay operations
 #[derive(Debug, thiserror::Error)]
 pub enum OverlayError {
    #[error("Database error: {0}")]
    Database(#[from] musicfs_core::Error),
    #[error("Format handler error: {0}")]
    Handler(#[from] FormatError),
    #[error("CAS error: {0}")]
    Cas(#[from] ReaderError),
    #[error("File not found: {0:?}")]
    NotFound(FileId),
    #[error("No handler for format: {0:?}")]
    NoHandler(AudioFormat),
 }
 /// OverlayReader provides on-the-fly metadata overlay for audio files.
 ///
 /// It synthesizes headers from database metadata and splices them with
 /// original audio data from the CAS, presenting a virtual file that
 /// reflects the current metadata state.
 pub struct OverlayReader {
    db: Arc<Database>,
    registry: Arc<FormatHandlerRegistry>,
    cas_reader: Arc<FileReader>,
 }
 impl OverlayReader {
    /// Create a new OverlayReader with the given dependencies.
    pub fn new(
        db: Arc<Database>,
        registry: Arc<FormatHandlerRegistry>,
        cas_reader: Arc<FileReader>,
    ) -> Self {
        Self {
            db,
            registry,
            cas_reader,
        }
    }
    /// Read bytes from a virtual file with metadata overlay.
    ///
    /// This method implements the three-region splice logic:
    /// - Region 1: Synthetic header (offset < header_len)
    /// - Region 2: Audio data from CAS (offset >= header_len)
    /// - Region 3: Boundary crossing (spans header/audio)
    ///
    /// If no format_layout exists for the file, delegates directly to CAS reader.
    pub async fn read(
        &self,
        file_id: FileId,
        offset: u64,
        size: u32,
    ) -> Result<Bytes, OverlayError> {
        // Get format layout - if None, passthrough to CAS
        let layout = match self.db.get_format_layout(file_id)? {
            Some(layout) => layout,
            None => {
                trace!(file_id = ?file_id, "No format_layout, passthrough to CAS");
                return Ok(self.cas_reader.read(file_id, offset, size).await?);
            }
        };
        // Get metadata for synthesis
        let metadata = self.db.get_file_metadata_row(file_id)?;
        // Get handler for this format (handler IDs are lowercase)
        let format_id = format!("{:?}", layout.format).to_lowercase();
        let handler = self
            .registry
            .get_by_format(&format_id)
            .ok_or_else(|| OverlayError::NoHandler(layout.format))?;
        // Synthesize header on-the-fly
        let header = handler.synthesize(&metadata, &layout)?;
        let header_len = header.len() as u64;
        let audio_len = layout.audio_end - layout.audio_start;
        let virtual_size = header_len + audio_len;
        trace!(
            file_id = ?file_id,
            header_len,
            audio_len,
            virtual_size,
            offset,
            size,
            "Overlay read"
        );
        // Handle EOF
        if offset >= virtual_size {
            return Ok(Bytes::new());
        }
        let virtual_end = (offset + size as u64).min(virtual_size);
        let mut result = BytesMut::with_capacity((virtual_end - offset) as usize);
        // Region 1: Synthetic header
        if offset < header_len {
            let end = virtual_end.min(header_len);
            result.extend_from_slice(&header[offset as usize..end as usize]);
            trace!(
                file_id = ?file_id,
                start = offset,
                end,
                bytes = end - offset,
                "Read from synthetic header"
            );
        }
        // Region 2: Origin audio data (from CAS)
        if virtual_end > header_len {
            let audio_start_in_virtual = header_len.max(offset);
            let audio_offset_in_origin = layout.audio_start + (audio_start_in_virtual - header_len);
            let audio_bytes_needed = (virtual_end - audio_start_in_virtual) as u32;
            trace!(
                file_id = ?file_id,
                audio_offset_in_origin,
                audio_bytes_needed,
                "Read from CAS audio"
            );
            let audio = self
                .cas_reader
                .read(file_id, audio_offset_in_origin, audio_bytes_needed)
                .await?;
            result.extend_from_slice(&audio);
        }
        debug!(
            file_id = ?file_id,
            offset,
            size,
            returned = result.len(),
            "Overlay read complete"
        );
        Ok(result.freeze())
    }
    /// Estimate the virtual size of a file for getattr.
    ///
    /// Returns the estimated size based on format layout. If no layout exists,
    /// returns None to indicate the caller should use the original file size.
    pub fn estimate_virtual_size(&self, file_id: FileId) -> Result<Option<u64>, OverlayError> {
        // Get format layout - if None, return None to indicate passthrough
        let layout = match self.db.get_format_layout(file_id)? {
            Some(layout) => layout,
            None => return Ok(None),
        };
        // Get metadata for header size estimation
        let metadata = self.db.get_file_metadata_row(file_id)?;
        let format_id = format!("{:?}", layout.format).to_lowercase();
        let handler = self
            .registry
            .get_by_format(&format_id)
            .ok_or_else(|| OverlayError::NoHandler(layout.format))?;
        // Estimate header size
        let estimated_header = handler.estimate_header_size(&metadata) as u64;
        let audio_len = layout.audio_end - layout.audio_start;
        let virtual_size = estimated_header + audio_len;
        trace!(
            file_id = ?file_id,
            estimated_header,
            audio_len,
            virtual_size,
            "Estimated virtual size"
        );
        Ok(Some(virtual_size))
    }
 }
 #[cfg(test)]
 mod tests {
    use super::*;
    use crate::handlers::FlacHandler;
    use crate::FormatLayout;
    use musicfs_cas::{CasConfig, CasStore, ChunkManifest, ChunkRef};
    use musicfs_core::{AudioFormat, AudioMeta, OriginId, VirtualPath};
    use std::path::Path;
    use std::time::UNIX_EPOCH;
    use tempfile::TempDir;
    fn make_test_metadata() -> AudioMeta {
        AudioMeta {
            title: Some("Test Track".to_string()),
            artist: Some("Test Artist".to_string()),
            album: Some("Test Album".to_string()),
            track: Some(1),
            format: AudioFormat::Flac,
            sample_rate: Some(44100),
            bits_per_sample: Some(16),
            channels: Some(2),
            ..Default::default()
        }
    }
    fn make_test_layout() -> FormatLayout {
        // Simulate a file with minimal FLAC header, audio from 42 to 102442 (100KB audio)
        // STREAMINFO data (34 bytes) - minimal valid values for FLAC synthesis
        let streaminfo_data = vec![
            0x10, 0x00, // min_block_size = 4096
            0x10, 0x00, // max_block_size = 4096
            0x00, 0x00, 0x00, // min_frame_size = 0
            0x00, 0x00, 0x00, // max_frame_size = 0
            0x0A, 0xC4, 0x42, 0xF0, // sample_rate=44100, channels=2, bits=16
            0x00, 0x00, 0x00, 0x00, // total_samples
            0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, // MD5 (16 bytes)
            0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00,
        ];
        FormatLayout {
            audio_start: 42,            // fLaC (4) + STREAMINFO block (38)
            audio_end: 42 + 100 * 1024, // 100KB audio
            format: AudioFormat::Flac,
            format_data: Some(streaminfo_data),
        }
    }
    async fn setup_test_env() -> (
        TempDir,
        Arc<Database>,
        Arc<FormatHandlerRegistry>,
        Arc<FileReader>,
        FileId,
    ) {
        let dir = TempDir::new().unwrap();
        // Setup database
        let db = Arc::new(Database::open_memory().unwrap());
        // Setup registry with FLAC handler
        let mut registry = FormatHandlerRegistry::new();
        registry.register(Arc::new(FlacHandler::new()));
        let registry = Arc::new(registry);
        // Setup CAS store and reader
        let cas_config = CasConfig {
            chunks_dir: dir.path().join("chunks"),
            ..Default::default()
        };
        let store = Arc::new(CasStore::open(cas_config).await.unwrap());
        // Create test audio data (simulating 100KB of audio)
        let audio_data: Vec<u8> = (0..100 * 1024).map(|i| (i % 256) as u8).collect();
        let hash = store.put(&audio_data).await.unwrap();
        let reader = Arc::new(FileReader::new(store));
        // Register manifest for the test file
        // The manifest represents the ORIGINAL file in CAS, with audio starting at offset 42
        reader.register_manifest(ChunkManifest {
            file_id: FileId(1),
            total_size: 42 + 100 * 1024, // Original file size (42 byte header + 100KB audio)
            mtime: 0,
            chunks: vec![ChunkRef {
                hash,
                offset: 42, // Audio starts at offset 42 in the original file
                size: audio_data.len() as u32,
            }],
        });
        let file_id = db
            .upsert_file_with_layout(
                &OriginId::from("test"),
                Path::new("/test.flac"),
                &VirtualPath::new("/Test Artist/Test Album/01 - Test Track.flac"),
                &make_test_metadata(),
                UNIX_EPOCH,
                42 + 100 * 1024,
                Some(&make_test_layout()),
                None,
            )
            .unwrap();
        (dir, db, registry, reader, file_id)
    }
    #[tokio::test]
    async fn test_read_header_region() {
        let (_dir, db, registry, reader, file_id) = setup_test_env().await;
        let overlay = OverlayReader::new(db, registry, reader);
        // Read first 100 bytes (should be from synthetic header)
        let result = overlay.read(file_id, 0, 100).await.unwrap();
        // Should return data (synthetic header)
        assert!(!result.is_empty());
        assert!(result.len() <= 100);
        // FLAC files start with "fLaC" magic
        assert_eq!(&result[0..4], b"fLaC");
    }
    #[tokio::test]
    async fn test_read_audio_region() {
        let (_dir, db, registry, reader, file_id) = setup_test_env().await;
        let overlay = OverlayReader::new(db.clone(), registry.clone(), reader.clone());
        // First, get the actual header size by reading it
        let _header_result = overlay.read(file_id, 0, 64 * 1024).await.unwrap();
        // Get the layout to know where audio starts in virtual file
        let layout = db.get_format_layout(file_id).unwrap().unwrap();
        let metadata = db.get_file_metadata_row(file_id).unwrap();
        let handler = registry.get_by_format("flac").unwrap();
        let header = handler.synthesize(&metadata, &layout).unwrap();
        let header_len = header.len() as u64;
        // Read from well into the audio region
        let audio_offset = header_len + 1000;
        let result = overlay.read(file_id, audio_offset, 1000).await.unwrap();
        // Should return audio data
        assert!(!result.is_empty());
    }
    #[tokio::test]
    async fn test_read_boundary() {
        let (_dir, db, registry, reader, file_id) = setup_test_env().await;
        let overlay = OverlayReader::new(db.clone(), registry.clone(), reader.clone());
        // Get the actual header size
        let layout = db.get_format_layout(file_id).unwrap().unwrap();
        let metadata = db.get_file_metadata_row(file_id).unwrap();
        let handler = registry.get_by_format("flac").unwrap();
        let header = handler.synthesize(&metadata, &layout).unwrap();
        let header_len = header.len() as u64;
        // Read across the header/audio boundary
        let boundary_offset = header_len - 50;
        let result = overlay.read(file_id, boundary_offset, 100).await.unwrap();
        // Should return 100 bytes spanning both regions
        assert_eq!(result.len(), 100);
        // First 50 bytes should be from header
        assert_eq!(&result[0..50], &header[(header_len - 50) as usize..]);
    }
    #[tokio::test]
    async fn test_passthrough() {
        let dir = TempDir::new().unwrap();
        let db = Arc::new(Database::open_memory().unwrap());
        let registry = Arc::new(FormatHandlerRegistry::new());
        let cas_config = CasConfig {
            chunks_dir: dir.path().join("chunks"),
            ..Default::default()
        };
        let store = Arc::new(CasStore::open(cas_config).await.unwrap());
        let test_data = b"Hello, World! This is test data.";
        let hash = store.put(test_data).await.unwrap();
        // Insert file WITHOUT format_layout first to get the file_id
        let file_id = db
            .upsert_file(
                &OriginId::from("test"),
                Path::new("/test.txt"),
                &VirtualPath::new("/test.txt"),
                &AudioMeta::default(),
                UNIX_EPOCH,
                test_data.len() as u64,
            )
            .unwrap();
        let reader = Arc::new(FileReader::new(store));
        // Register manifest with the actual file_id from database
        reader.register_manifest(ChunkManifest {
            file_id,
            total_size: test_data.len() as u64,
            mtime: 0,
            chunks: vec![ChunkRef {
                hash,
                offset: 0,
                size: test_data.len() as u32,
            }],
        });
        let overlay = OverlayReader::new(db, registry, reader);
        let result = overlay
            .read(file_id, 0, test_data.len() as u32)
            .await
            .unwrap();
        assert_eq!(&result[..], test_data);
    }
    #[tokio::test]
    async fn test_estimate_virtual_size() {
        let (_dir, db, registry, reader, file_id) = setup_test_env().await;
        let overlay = OverlayReader::new(db, registry, reader);
        // Should return estimated size
        let size = overlay.estimate_virtual_size(file_id).unwrap();
        assert!(size.is_some());
        let virtual_size = size.unwrap();
        // Virtual size should be header + audio (100KB audio)
        assert!(virtual_size > 100 * 1024);
    }
    #[tokio::test]
    async fn test_estimate_virtual_size_passthrough() {
        let dir = TempDir::new().unwrap();
        let db = Arc::new(Database::open_memory().unwrap());
        let registry = Arc::new(FormatHandlerRegistry::new());
        let cas_config = CasConfig {
            chunks_dir: dir.path().join("chunks"),
            ..Default::default()
        };
        let store = Arc::new(CasStore::open(cas_config).await.unwrap());
        let reader = Arc::new(FileReader::new(store));
        // Insert file WITHOUT format_layout
        let file_id = db
            .upsert_file(
                &OriginId::from("test"),
                Path::new("/test.txt"),
                &VirtualPath::new("/test.txt"),
                &AudioMeta::default(),
                UNIX_EPOCH,
                1000,
            )
            .unwrap();
        let overlay = OverlayReader::new(db, registry, reader);
        // Should return None for passthrough
        let size = overlay.estimate_virtual_size(file_id).unwrap();
        assert!(size.is_none());
    }
    #[tokio::test]
    async fn test_read_eof() {
        let (_dir, db, registry, reader, file_id) = setup_test_env().await;
        let overlay = OverlayReader::new(db, registry, reader);
        // Read past EOF
        let result = overlay.read(file_id, 1_000_000, 100).await.unwrap();
        assert!(result.is_empty());
    }
 }
@@ -1,291 +0,0 @@
 use musicfs_core::FileId;
 use parking_lot::{Mutex, RwLock};
 use std::collections::HashMap;
 use std::path::Path;
 use std::time::{SystemTime, UNIX_EPOCH};
 use tracing::{debug, info, trace};
 #[derive(Debug, Clone)]
 pub struct AccessPattern {
    pub file_id: FileId,
    pub timestamp: SystemTime,
    pub context: AccessContext,
    pub hour_of_day: u8,
 }
 #[derive(Debug, Clone, Default)]
 pub struct AccessContext {
    pub album_id: Option<i64>,
    pub track_number: Option<u32>,
    pub artist: Option<String>,
 }
 pub struct PatternStore {
    db: Mutex<rusqlite::Connection>,
    sequence_counts: RwLock<HashMap<(FileId, FileId), u32>>,
    time_patterns: RwLock<HashMap<u8, Vec<FileId>>>,
    max_history: usize,
 }
 impl PatternStore {
    pub fn new(db_path: &Path, max_history: usize) -> Result<Self, PatternError> {
        let db = rusqlite::Connection::open(db_path)?;
        db.execute(
            "CREATE TABLE IF NOT EXISTS access_log (
                id INTEGER PRIMARY KEY,
                file_id INTEGER NOT NULL,
                access_time INTEGER NOT NULL,
                hour_of_day INTEGER NOT NULL
            )",
            [],
        )?;
        db.execute(
            "CREATE INDEX IF NOT EXISTS idx_access_log_file ON access_log(file_id)",
            [],
        )?;
        db.execute(
            "CREATE INDEX IF NOT EXISTS idx_access_log_time ON access_log(access_time)",
            [],
        )?;
        db.execute(
            "CREATE TABLE IF NOT EXISTS sequence_counts (
                from_file_id INTEGER NOT NULL,
                to_file_id INTEGER NOT NULL,
                count INTEGER NOT NULL DEFAULT 1,
                PRIMARY KEY (from_file_id, to_file_id)
            )",
            [],
        )?;
        let sequence_counts = {
            let mut map = HashMap::new();
            let mut stmt =
                db.prepare("SELECT from_file_id, to_file_id, count FROM sequence_counts")?;
            let rows = stmt.query_map([], |row| {
                Ok((
                    (FileId(row.get::<_, i64>(0)?), FileId(row.get::<_, i64>(1)?)),
                    row.get::<_, u32>(2)?,
                ))
            })?;
            for row in rows {
                let (key, count) = row?;
                map.insert(key, count);
            }
            map
        };
        let store = Self {
            db: Mutex::new(db),
            sequence_counts: RwLock::new(sequence_counts),
            time_patterns: RwLock::new(HashMap::new()),
            max_history,
        };
        let sequence_count = store.sequence_counts.read().len();
        info!(path = ?db_path, sequence_count = sequence_count, max_history = max_history, "Pattern store opened");
        Ok(store)
    }
    pub fn record(&self, file_id: FileId, _context: AccessContext) -> Result<(), PatternError> {
        trace!(file_id = file_id.0, "Recording access pattern");
        let now = SystemTime::now();
        let timestamp = now.duration_since(UNIX_EPOCH).unwrap().as_secs() as i64;
        let hour = (timestamp / 3600 % 24) as u8;
        let db = self.db.lock();
        db.execute(
            "INSERT INTO access_log (file_id, access_time, hour_of_day) VALUES (?1, ?2, ?3)",
            rusqlite::params![file_id.0, timestamp, hour],
        )?;
        {
            let mut time_patterns = self.time_patterns.write();
            time_patterns.entry(hour).or_default().push(file_id);
        }
        let prev_file_id: Option<i64> = db
            .query_row(
                "SELECT file_id FROM access_log WHERE id = (SELECT MAX(id) - 1 FROM access_log)",
                [],
                |row| row.get(0),
            )
            .ok();
        if let Some(prev_id) = prev_file_id {
            let prev = FileId(prev_id);
            {
                let mut sequences = self.sequence_counts.write();
                *sequences.entry((prev, file_id)).or_insert(0) += 1;
            }
            db.execute(
                "INSERT INTO sequence_counts (from_file_id, to_file_id, count) 
                 VALUES (?1, ?2, 1)
                 ON CONFLICT(from_file_id, to_file_id) DO UPDATE SET count = count + 1",
                rusqlite::params![prev_id, file_id.0],
            )?;
        }
        let cutoff = timestamp - (self.max_history as i64 * 86400);
        db.execute("DELETE FROM access_log WHERE access_time < ?1", [cutoff])?;
        Ok(())
    }
    pub fn predict_next(&self, current: FileId, limit: usize) -> Vec<FileId> {
        let sequences = self.sequence_counts.read();
        let mut predictions: Vec<_> = sequences
            .iter()
            .filter(|((from, _), count)| *from == current && **count >= 2)
            .map(|((_, to), count)| (*to, *count))
            .collect();
        predictions.sort_by(|a, b| b.1.cmp(&a.1));
        let result: Vec<FileId> = predictions
            .into_iter()
            .take(limit)
            .map(|(id, _)| id)
            .collect();
        debug!(
            file_id = current.0,
            predictions = result.len(),
            "Predicted next files"
        );
        result
    }
    pub fn predict_for_time(&self, hour: u8, limit: usize) -> Vec<FileId> {
        let time_patterns = self.time_patterns.read();
        time_patterns
            .get(&hour)
            .map(|files| files.iter().rev().take(limit).copied().collect())
            .unwrap_or_default()
    }
    pub fn recently_played(&self, days: u32) -> Result<Vec<FileId>, PatternError> {
        let cutoff = SystemTime::now()
            .duration_since(UNIX_EPOCH)
            .unwrap()
            .as_secs() as i64
            - (days as i64 * 86400);
        let db = self.db.lock();
        let mut stmt = db.prepare(
            "SELECT DISTINCT file_id FROM access_log WHERE access_time >= ?1 ORDER BY access_time DESC",
        )?;
        let files: Vec<FileId> = stmt
            .query_map([cutoff], |row| Ok(FileId(row.get(0)?)))?
            .filter_map(|r| r.ok())
            .collect();
        Ok(files)
    }
    pub fn most_played(&self, limit: u32) -> Result<Vec<FileId>, PatternError> {
        let db = self.db.lock();
        let mut stmt = db.prepare(
            "SELECT file_id, COUNT(*) as play_count FROM access_log 
             GROUP BY file_id ORDER BY play_count DESC LIMIT ?1",
        )?;
        let files: Vec<FileId> = stmt
            .query_map([limit], |row| Ok(FileId(row.get(0)?)))?
            .filter_map(|r| r.ok())
            .collect();
        Ok(files)
    }
 }
 #[derive(Debug, thiserror::Error)]
 pub enum PatternError {
    #[error("database error: {0}")]
    Database(#[from] rusqlite::Error),
 }
 #[cfg(test)]
 mod tests {
    use super::*;
    use tempfile::TempDir;
    #[test]
    fn test_pattern_prediction() {
        let dir = TempDir::new().unwrap();
        let db_path = dir.path().join("patterns.db");
        let store = PatternStore::new(&db_path, 30).unwrap();
        let ctx = AccessContext::default();
        for _ in 0..5 {
            store.record(FileId(1), ctx.clone()).unwrap();
            store.record(FileId(2), ctx.clone()).unwrap();
            store.record(FileId(3), ctx.clone()).unwrap();
        }
        let predictions = store.predict_next(FileId(1), 3);
        assert!(!predictions.is_empty());
        assert_eq!(predictions[0], FileId(2));
    }
    #[test]
    fn test_pattern_persistence() {
        let dir = TempDir::new().unwrap();
        let db_path = dir.path().join("patterns.db");
        let ctx = AccessContext::default();
        {
            let store = PatternStore::new(&db_path, 30).unwrap();
            for _ in 0..3 {
                store.record(FileId(1), ctx.clone()).unwrap();
                store.record(FileId(2), ctx.clone()).unwrap();
            }
        }
        {
            let store = PatternStore::new(&db_path, 30).unwrap();
            let predictions = store.predict_next(FileId(1), 3);
            assert!(!predictions.is_empty());
            assert_eq!(predictions[0], FileId(2));
        }
    }
    #[test]
    fn test_recently_played() {
        let dir = TempDir::new().unwrap();
        let db_path = dir.path().join("patterns.db");
        let store = PatternStore::new(&db_path, 30).unwrap();
        let ctx = AccessContext::default();
        store.record(FileId(100), ctx.clone()).unwrap();
        store.record(FileId(200), ctx.clone()).unwrap();
        let recent = store.recently_played(7).unwrap();
        assert!(recent.contains(&FileId(100)));
        assert!(recent.contains(&FileId(200)));
    }
    #[test]
    fn test_most_played() {
        let dir = TempDir::new().unwrap();
        let db_path = dir.path().join("patterns.db");
        let store = PatternStore::new(&db_path, 30).unwrap();
        let ctx = AccessContext::default();
        for _ in 0..5 {
            store.record(FileId(1), ctx.clone()).unwrap();
        }
        for _ in 0..2 {
            store.record(FileId(2), ctx.clone()).unwrap();
        }
        let most = store.most_played(10).unwrap();
        assert_eq!(most[0], FileId(1));
    }
 }
@@ -1,197 +0,0 @@
 use crate::patterns::{AccessContext, PatternStore};
 use musicfs_cas::ContentFetcher;
 use musicfs_core::{Event, EventBus, FileId};
 use parking_lot::Mutex as ParkingMutex;
 use std::collections::HashSet;
 use std::sync::atomic::{AtomicBool, Ordering};
 use std::sync::Arc;
 use std::time::Duration;
 use tokio::sync::Semaphore;
 use tokio::task::JoinHandle;
 use tracing::{debug, info, warn};
 const DEFAULT_PREFETCH_LOOKAHEAD: usize = 3;
 const DEFAULT_MAX_CONCURRENT: usize = 2;
 const DEFAULT_COOLDOWN_MS: u64 = 100;
 #[derive(Debug, Clone)]
 pub struct PrefetchConfig {
    pub lookahead: usize,
    pub max_concurrent: usize,
    pub cooldown: Duration,
    pub enabled: bool,
 }
 impl Default for PrefetchConfig {
    fn default() -> Self {
        Self {
            lookahead: DEFAULT_PREFETCH_LOOKAHEAD,
            max_concurrent: DEFAULT_MAX_CONCURRENT,
            cooldown: Duration::from_millis(DEFAULT_COOLDOWN_MS),
            enabled: true,
        }
    }
 }
 pub struct PrefetchEngine {
    config: PrefetchConfig,
    fetcher: Arc<ContentFetcher>,
    in_flight: Arc<ParkingMutex<HashSet<FileId>>>,
    semaphore: Arc<Semaphore>,
    running: Arc<AtomicBool>,
 }
 pub struct PrefetchHandle {
    handle: JoinHandle<()>,
    running: Arc<AtomicBool>,
 }
 impl PrefetchHandle {
    pub async fn stop(self) {
        self.running.store(false, Ordering::SeqCst);
        let _ = self.handle.await;
    }
 }
 impl PrefetchEngine {
    pub fn new(
        config: PrefetchConfig,
        _pattern_store: Arc<PatternStore>,
        fetcher: Arc<ContentFetcher>,
    ) -> Self {
        let semaphore = Arc::new(Semaphore::new(config.max_concurrent));
        Self {
            config,
            fetcher,
            in_flight: Arc::new(ParkingMutex::new(HashSet::new())),
            semaphore,
            running: Arc::new(AtomicBool::new(false)),
        }
    }
    pub fn start(
        self: Arc<Self>,
        event_bus: Arc<EventBus>,
        pattern_store: Arc<PatternStore>,
    ) -> PrefetchHandle {
        self.running.store(true, Ordering::SeqCst);
        let running = self.running.clone();
        let config = self.config.clone();
        let fetcher = self.fetcher.clone();
        let in_flight = self.in_flight.clone();
        let semaphore = self.semaphore.clone();
        let running_inner = running.clone();
        let handle = tokio::spawn(async move {
            let mut rx = event_bus.subscribe();
            while running_inner.load(Ordering::SeqCst) {
                match tokio::time::timeout(Duration::from_secs(1), rx.recv()).await {
                    Ok(Ok(event)) => {
                        if let Event::FileAccessed { file_id, .. } = event {
                            if config.enabled {
                                let ctx = AccessContext::default();
                                if let Err(e) = pattern_store.record(file_id, ctx) {
                                    warn!("Failed to record access pattern: {}", e);
                                    continue;
                                }
                                let predictions =
                                    pattern_store.predict_next(file_id, config.lookahead);
                                for predicted_id in predictions {
                                    prefetch_file(predicted_id, &fetcher, &in_flight, &semaphore)
                                        .await;
                                }
                                tokio::time::sleep(config.cooldown).await;
                            }
                        }
                    }
                    Ok(Err(_)) => break,
                    Err(_) => continue,
                }
            }
            info!("Prefetch engine stopped");
        });
        PrefetchHandle { handle, running }
    }
    pub fn is_running(&self) -> bool {
        self.running.load(Ordering::SeqCst)
    }
    pub fn in_flight_count(&self) -> usize {
        self.in_flight.lock().len()
    }
    pub fn update_config(&mut self, config: PrefetchConfig) {
        self.config = config;
    }
 }
 async fn prefetch_file(
    file_id: FileId,
    fetcher: &Arc<ContentFetcher>,
    in_flight: &Arc<ParkingMutex<HashSet<FileId>>>,
    semaphore: &Arc<Semaphore>,
 ) {
    {
        let mut guard = in_flight.lock();
        if guard.contains(&file_id) {
            debug!("Skipping prefetch for {:?} - already in flight", file_id);
            return;
        }
        guard.insert(file_id);
    }
    let permit = match semaphore.clone().try_acquire_owned() {
        Ok(p) => p,
        Err(_) => {
            debug!("Skipping prefetch for {:?} - concurrency limit", file_id);
            in_flight.lock().remove(&file_id);
            return;
        }
    };
    let fetcher = fetcher.clone();
    let in_flight = in_flight.clone();
    tokio::spawn(async move {
        debug!("Prefetching file {:?}", file_id);
        match fetcher.ensure_cached(file_id).await {
            Ok(manifest) => {
                info!(
                    "Prefetched {:?}: {} chunks, {} bytes",
                    file_id,
                    manifest.chunks.len(),
                    manifest.total_size
                );
            }
            Err(e) => {
                debug!("Prefetch failed for {:?}: {}", file_id, e);
            }
        }
        in_flight.lock().remove(&file_id);
        drop(permit);
    });
 }
 #[cfg(test)]
 mod tests {
    use super::*;
    #[test]
    fn test_prefetch_config_defaults() {
        let config = PrefetchConfig::default();
        assert_eq!(config.lookahead, 3);
        assert_eq!(config.max_concurrent, 2);
        assert!(config.enabled);
    }
 }
@@ -1,111 +0,0 @@
 PRAGMA journal_mode = WAL;
 PRAGMA foreign_keys = ON;
 PRAGMA synchronous = NORMAL;
 CREATE TABLE IF NOT EXISTS files (
    id              INTEGER PRIMARY KEY,
    origin_id       TEXT NOT NULL,
    real_path       TEXT NOT NULL,
    virtual_path    TEXT NOT NULL,
    title           TEXT,
    artist          TEXT,
    album           TEXT,
    album_artist    TEXT,
    genre           TEXT,
    year            INTEGER,
    track           INTEGER,
    disc            INTEGER,
    duration_ms     INTEGER,
    bitrate         INTEGER,
    sample_rate     INTEGER,
    format          TEXT,
    track_total     INTEGER,
    disc_total      INTEGER,
    date            TEXT,
    composer        TEXT,
    comment         TEXT,
    lyrics          TEXT,
    copyright       TEXT,
    compilation     INTEGER,
    artist_sort     TEXT,
    album_artist_sort TEXT,
    album_sort      TEXT,
    title_sort      TEXT,
    mb_recording_id TEXT,
    mb_album_id     TEXT,
    mb_artist_id    TEXT,
    mb_album_artist_id TEXT,
    mb_release_group_id TEXT,
    replaygain_track_gain REAL,
    replaygain_track_peak REAL,
    replaygain_album_gain REAL,
    replaygain_album_peak REAL,
    channels        INTEGER,
    bits_per_sample INTEGER,
    encoder         TEXT,
    custom_tags     TEXT,
    format_layout   BLOB,
    label           TEXT,
    album_type      TEXT,
    cover_url       TEXT,
    genres_json     TEXT,
    enrichment_source TEXT,
    enriched_at     INTEGER,
    enrichment_attempts INTEGER NOT NULL DEFAULT 0,
    last_enrichment_error TEXT,
    origin_mtime    INTEGER NOT NULL,
    origin_size     INTEGER NOT NULL,
    content_hash    TEXT,
    chunk_manifest  BLOB,
    last_sync       INTEGER NOT NULL DEFAULT (strftime('%s', 'now')),
    trashed         INTEGER NOT NULL DEFAULT 0,
    original_path   TEXT,
    trashed_at      INTEGER,
    UNIQUE(origin_id, real_path)
 );
 CREATE TABLE IF NOT EXISTS artwork (
    id          INTEGER PRIMARY KEY,
    file_id     INTEGER NOT NULL REFERENCES files(id) ON DELETE CASCADE,
    art_type    TEXT NOT NULL,
    chunk_hash  TEXT NOT NULL,
    width       INTEGER,
    height      INTEGER,
    mime_type   TEXT,
    UNIQUE(file_id, art_type)
 );
 CREATE TABLE IF NOT EXISTS collections (
    id          INTEGER PRIMARY KEY,
    name        TEXT NOT NULL UNIQUE,
    query_json  TEXT NOT NULL,
    created_at  INTEGER NOT NULL DEFAULT (strftime('%s', 'now')),
    updated_at  INTEGER NOT NULL DEFAULT (strftime('%s', 'now'))
 );
 CREATE INDEX IF NOT EXISTS idx_files_virtual ON files(virtual_path);
 CREATE INDEX IF NOT EXISTS idx_files_artist_album ON files(artist, album);
 CREATE INDEX IF NOT EXISTS idx_files_content_hash ON files(content_hash);
 CREATE INDEX IF NOT EXISTS idx_files_real ON files(origin_id, real_path);
 CREATE INDEX IF NOT EXISTS idx_files_origin ON files(origin_id);
 CREATE INDEX IF NOT EXISTS idx_files_last_sync ON files(last_sync);
 CREATE INDEX IF NOT EXISTS idx_files_mb_album ON files(mb_album_id);
 CREATE INDEX IF NOT EXISTS idx_files_mb_artist ON files(mb_artist_id);
 CREATE INDEX IF NOT EXISTS idx_files_genre ON files(genre);
 CREATE INDEX IF NOT EXISTS idx_files_year ON files(year);
 CREATE INDEX IF NOT EXISTS idx_files_composer ON files(composer);
 CREATE INDEX IF NOT EXISTS idx_artwork_file ON artwork(file_id);
 CREATE TABLE IF NOT EXISTS directories (
    id          INTEGER PRIMARY KEY,
    path        TEXT NOT NULL UNIQUE,
    created_at  INTEGER NOT NULL DEFAULT (strftime('%s', 'now'))
 );
 CREATE INDEX IF NOT EXISTS idx_directories_path ON directories(path);
 CREATE INDEX IF NOT EXISTS idx_files_trashed ON files(trashed) WHERE trashed = 1;
@@ -1,29 +0,0 @@
 [package]
 name = "musicfs-cas"
 version.workspace = true
 edition.workspace = true
 [features]
 default = []
 failpoints = ["fail/failpoints"]
 [dependencies]
 fail = { workspace = true, optional = true }
 musicfs-core = { path = "../musicfs-core" }
 musicfs-origins = { path = "../musicfs-origins" }
 musicfs-sync = { path = "../musicfs-sync" }
 tokio.workspace = true
 tracing.workspace = true
 serde.workspace = true
 sled.workspace = true
 xxhash-rust.workspace = true
 bytes.workspace = true
 rmp-serde.workspace = true
 hex.workspace = true
 dirs.workspace = true
 thiserror.workspace = true
 parking_lot.workspace = true
 [dev-dependencies]
 tempfile.workspace = true
 musicfs-cache = { path = "../musicfs-cache" }
@@ -1,45 +0,0 @@
 use musicfs_core::ChunkHash;
 use serde::{Deserialize, Serialize};
 use std::path::PathBuf;
 #[derive(Debug, Clone, Serialize, Deserialize)]
 pub struct ChunkLocation {
    pub path: PathBuf,
    pub size: u32,
 }
 #[derive(Debug, Clone, Serialize, Deserialize)]
 pub struct ChunkRef {
    pub hash: ChunkHash,
    pub offset: u64,
    pub size: u32,
 }
 #[cfg(test)]
 mod tests {
    use super::*;
    #[test]
    fn test_chunk_hash_from_bytes() {
        let data = b"hello world";
        let hash = ChunkHash::from_bytes(data);
        assert_eq!(hash.as_hex().len(), 16);
    }
    #[test]
    fn test_chunk_hash_deterministic() {
        let data = b"test data";
        let hash1 = ChunkHash::from_bytes(data);
        let hash2 = ChunkHash::from_bytes(data);
        assert_eq!(hash1, hash2);
    }
    #[test]
    fn test_chunk_hash_hex_roundtrip() {
        let data = b"roundtrip test";
        let hash = ChunkHash::from_bytes(data);
        let hex = hash.as_hex();
        let restored = ChunkHash::from_hex(&hex).unwrap();
        assert_eq!(hash, restored);
    }
 }
@@ -1,284 +0,0 @@
 use crate::{CasStore, ChunkManifest, ChunkRef};
 use musicfs_core::{Event, EventBus, FileId, FileMeta, OriginId};
 use musicfs_origins::Origin;
 use musicfs_sync::CdcChunker;
 use parking_lot::RwLock;
 use std::collections::HashMap;
 use std::sync::Arc;
 use tracing::{debug, info, warn};
 pub struct ContentFetcher {
    store: Arc<CasStore>,
    origins: RwLock<HashMap<OriginId, Arc<dyn Origin>>>,
    file_meta: RwLock<HashMap<FileId, FileMeta>>,
    event_bus: Option<Arc<EventBus>>,
    chunker: CdcChunker,
 }
 impl ContentFetcher {
    pub fn new(store: Arc<CasStore>) -> Self {
        Self {
            store,
            origins: RwLock::new(HashMap::new()),
            file_meta: RwLock::new(HashMap::new()),
            event_bus: None,
            chunker: CdcChunker::default(),
        }
    }
    pub fn with_event_bus(store: Arc<CasStore>, event_bus: Arc<EventBus>) -> Self {
        Self {
            store,
            origins: RwLock::new(HashMap::new()),
            file_meta: RwLock::new(HashMap::new()),
            event_bus: Some(event_bus),
            chunker: CdcChunker::default(),
        }
    }
    pub fn register_origin(&self, origin: Arc<dyn Origin>) {
        let id = origin.id().clone();
        self.origins.write().insert(id, origin);
    }
    pub fn register_file(&self, meta: FileMeta) {
        self.file_meta.write().insert(meta.id, meta);
    }
    pub fn register_files(&self, files: impl IntoIterator<Item = FileMeta>) {
        let mut map = self.file_meta.write();
        for meta in files {
            map.insert(meta.id, meta);
        }
    }
    pub async fn fetch_file(&self, file_id: FileId) -> Result<ChunkManifest, FetchError> {
        let meta = {
            let files = self.file_meta.read();
            files
                .get(&file_id)
                .cloned()
                .ok_or(FetchError::FileNotFound(file_id))?
        };
        let origin = {
            let origins = self.origins.read();
            origins
                .get(&meta.real_path.origin_id)
                .cloned()
                .ok_or_else(|| FetchError::OriginNotFound(meta.real_path.origin_id.clone()))?
        };
        info!("Fetching file {:?} from origin {}", file_id, origin.id());
        let data = origin
            .read_full(&meta.real_path.path)
            .await
            .map_err(|e| FetchError::OriginRead(e.to_string()))?;
        let mtime = meta
            .mtime
            .duration_since(std::time::UNIX_EPOCH)
            .map(|d| d.as_secs() as i64)
            .unwrap_or(0);
        let chunks = self.chunker.chunk_refs(&data);
        info!("Chunked {:?} into {} chunks", file_id, chunks.len());
        let mut chunk_refs = Vec::with_capacity(chunks.len());
        for chunk in chunks {
            if !self.store.exists(&chunk.hash) {
                if let Err(e) = self.store.put(chunk.data).await {
                    warn!(hash = %chunk.hash, error = %e, "CAS write failed, continuing in passthrough mode");
                }
            }
            chunk_refs.push(ChunkRef {
                hash: chunk.hash,
                offset: chunk.offset,
                size: chunk.length,
            });
        }
        let manifest = ChunkManifest {
            file_id,
            total_size: meta.size,
            mtime,
            chunks: chunk_refs,
        };
        debug!(
            "Created manifest for {:?}: {} bytes, {} chunks",
            file_id,
            meta.size,
            manifest.chunks.len()
        );
        Ok(manifest)
    }
    pub async fn ensure_cached(&self, file_id: FileId) -> Result<ChunkManifest, FetchError> {
        self.fetch_file(file_id).await
    }
    pub fn get_file_meta(&self, file_id: FileId) -> Option<FileMeta> {
        self.file_meta.read().get(&file_id).cloned()
    }
    pub fn emit_access_event(&self, meta: &FileMeta, offset: u64, size: u32) {
        if let Some(bus) = &self.event_bus {
            bus.publish(Event::FileAccessed {
                file_id: meta.id,
                path: meta.virtual_path.clone(),
                origin_id: meta.real_path.origin_id.clone(),
                offset,
                size,
            });
        }
    }
 }
 #[derive(Debug, thiserror::Error)]
 pub enum FetchError {
    #[error("File not found: {0:?}")]
    FileNotFound(FileId),
    #[error("Origin not found: {0}")]
    OriginNotFound(OriginId),
    #[error("Origin read error: {0}")]
    OriginRead(String),
    #[error("Store error: {0}")]
    Store(#[from] crate::CasError),
 }
 #[cfg(test)]
 mod tests {
    use super::*;
    use crate::CasConfig;
    use musicfs_core::{RealPath, VirtualPath};
    use musicfs_origins::LocalOrigin;
    use std::path::PathBuf;
    use std::time::SystemTime;
    use tempfile::TempDir;
    #[tokio::test]
    async fn test_fetch_file() {
        let cas_dir = TempDir::new().unwrap();
        let origin_dir = TempDir::new().unwrap();
        std::fs::write(origin_dir.path().join("test.flac"), b"fake audio data").unwrap();
        let config = CasConfig {
            chunks_dir: cas_dir.path().join("chunks"),
            ..Default::default()
        };
        let store = Arc::new(CasStore::open(config).await.unwrap());
        let fetcher = ContentFetcher::new(store.clone());
        let origin = Arc::new(LocalOrigin::new("local", origin_dir.path()));
        fetcher.register_origin(origin);
        let meta = FileMeta {
            id: FileId(1),
            virtual_path: VirtualPath::new("/Artist/Album/test.flac"),
            real_path: RealPath {
                origin_id: OriginId::from("local"),
                path: PathBuf::from("/test.flac"),
            },
            size: 15,
            mtime: SystemTime::now(),
            content_hash: None,
            audio: None,
        };
        fetcher.register_file(meta);
        let manifest = fetcher.fetch_file(FileId(1)).await.unwrap();
        assert_eq!(manifest.total_size, 15);
        assert_eq!(manifest.chunks.len(), 1);
        let data = store.get(&manifest.chunks[0].hash).await.unwrap();
        assert_eq!(&data[..], b"fake audio data");
    }
    #[tokio::test]
    async fn test_fetch_file_not_found() {
        let cas_dir = TempDir::new().unwrap();
        let config = CasConfig {
            chunks_dir: cas_dir.path().join("chunks"),
            ..Default::default()
        };
        let store = Arc::new(CasStore::open(config).await.unwrap());
        let fetcher = ContentFetcher::new(store);
        let result = fetcher.fetch_file(FileId(999)).await;
        assert!(matches!(result, Err(FetchError::FileNotFound(_))));
    }
    #[tokio::test]
    async fn test_fetch_emits_event() {
        let cas_dir = TempDir::new().unwrap();
        let origin_dir = TempDir::new().unwrap();
        std::fs::write(origin_dir.path().join("test.flac"), b"audio").unwrap();
        let config = CasConfig {
            chunks_dir: cas_dir.path().join("chunks"),
            ..Default::default()
        };
        let store = Arc::new(CasStore::open(config).await.unwrap());
        let event_bus = Arc::new(EventBus::default());
        let mut rx = event_bus.subscribe();
        let fetcher = ContentFetcher::with_event_bus(store, event_bus);
        let origin = Arc::new(LocalOrigin::new("local", origin_dir.path()));
        fetcher.register_origin(origin);
        let meta = FileMeta {
            id: FileId(1),
            virtual_path: VirtualPath::new("/Artist/test.flac"),
            real_path: RealPath {
                origin_id: OriginId::from("local"),
                path: PathBuf::from("/test.flac"),
            },
            size: 5,
            mtime: SystemTime::now(),
            content_hash: None,
            audio: None,
        };
        fetcher.register_file(meta.clone());
        fetcher.emit_access_event(&meta, 0, 5);
        let event = rx.try_recv().unwrap();
        assert!(matches!(event, Event::FileAccessed { .. }));
    }
    #[tokio::test]
    async fn test_fetch_origin_not_found() {
        let cas_dir = TempDir::new().unwrap();
        let config = CasConfig {
            chunks_dir: cas_dir.path().join("chunks"),
            ..Default::default()
        };
        let store = Arc::new(CasStore::open(config).await.unwrap());
        let fetcher = ContentFetcher::new(store);
        let meta = FileMeta {
            id: FileId(1),
            virtual_path: VirtualPath::new("/test.flac"),
            real_path: RealPath {
                origin_id: OriginId::from("nonexistent"),
                path: PathBuf::from("/test.flac"),
            },
            size: 100,
            mtime: SystemTime::now(),
            content_hash: None,
            audio: None,
        };
        fetcher.register_file(meta);
        let result = fetcher.fetch_file(FileId(1)).await;
        assert!(matches!(result, Err(FetchError::OriginNotFound(_))));
    }
 }
@@ -1,9 +0,0 @@
 mod chunks;
 mod fetcher;
 mod reader;
 mod store;
 pub use chunks::{ChunkLocation, ChunkRef};
 pub use fetcher::{ContentFetcher, FetchError};
 pub use reader::{ChunkManifest, FileReader, ReaderError};
 pub use store::{CasConfig, CasError, CasStore, DedupStats};
@@ -1,332 +0,0 @@
 use crate::chunks::ChunkRef;
 use crate::fetcher::{ContentFetcher, FetchError};
 use crate::store::{CasError, CasStore};
 use bytes::{Bytes, BytesMut};
 use musicfs_core::FileId;
 use parking_lot::RwLock;
 use serde::{Deserialize, Serialize};
 use std::collections::HashMap;
 use std::sync::Arc;
 use tracing::{debug, trace, warn};
 #[derive(Debug, Clone, Serialize, Deserialize)]
 pub struct ChunkManifest {
    pub file_id: FileId,
    pub total_size: u64,
    pub mtime: i64,
    pub chunks: Vec<ChunkRef>,
 }
 impl ChunkManifest {
    pub fn chunks_to_bytes(&self) -> Vec<u8> {
        rmp_serde::to_vec(&self.chunks).unwrap_or_default()
    }
    pub fn chunks_from_bytes(data: &[u8]) -> Option<Vec<ChunkRef>> {
        rmp_serde::from_slice(data).ok()
    }
    pub fn from_db(
        file_id: FileId,
        total_size: u64,
        mtime: i64,
        chunk_blob: &[u8],
    ) -> Option<Self> {
        let chunks = Self::chunks_from_bytes(chunk_blob)?;
        Some(Self {
            file_id,
            total_size,
            mtime,
            chunks,
        })
    }
 }
 pub struct FileReader {
    store: Arc<CasStore>,
    fetcher: Option<Arc<ContentFetcher>>,
    manifests: RwLock<HashMap<FileId, ChunkManifest>>,
 }
 impl FileReader {
    pub fn new(store: Arc<CasStore>) -> Self {
        Self {
            store,
            fetcher: None,
            manifests: RwLock::new(HashMap::new()),
        }
    }
    pub fn with_fetcher(store: Arc<CasStore>, fetcher: Arc<ContentFetcher>) -> Self {
        Self {
            store,
            fetcher: Some(fetcher),
            manifests: RwLock::new(HashMap::new()),
        }
    }
    pub fn register_manifest(&self, manifest: ChunkManifest) {
        let mut manifests = self.manifests.write();
        manifests.insert(manifest.file_id, manifest);
    }
    async fn get_or_fetch_manifest(&self, file_id: FileId) -> Result<ChunkManifest, ReaderError> {
        {
            let manifests = self.manifests.read();
            if let Some(m) = manifests.get(&file_id) {
                trace!(file_id = ?file_id, "manifest cache hit");
                return Ok(m.clone());
            }
        }
        trace!(file_id = ?file_id, "manifest cache miss");
        let Some(fetcher) = &self.fetcher else {
            return Err(ReaderError::ManifestNotFound(file_id));
        };
        let manifest = fetcher.ensure_cached(file_id).await?;
        self.manifests.write().insert(file_id, manifest.clone());
        Ok(manifest)
    }
    pub async fn read(
        &self,
        file_id: FileId,
        offset: u64,
        size: u32,
    ) -> Result<Bytes, ReaderError> {
        let manifest = self.get_or_fetch_manifest(file_id).await?;
        if let Some(fetcher) = &self.fetcher {
            if let Some(meta) = fetcher.get_file_meta(file_id) {
                fetcher.emit_access_event(&meta, offset, size);
            }
        }
        if offset >= manifest.total_size {
            return Ok(Bytes::new());
        }
        let end = std::cmp::min(offset + size as u64, manifest.total_size);
        let mut result = BytesMut::with_capacity((end - offset) as usize);
        let mut chunks_read = 0u32;
        for chunk_ref in &manifest.chunks {
            let chunk_start = chunk_ref.offset;
            let chunk_end = chunk_ref.offset + chunk_ref.size as u64;
            if chunk_end <= offset || chunk_start >= end {
                continue;
            }
            let chunk_data = match self.store.get(&chunk_ref.hash).await {
                Ok(data) => data,
                Err(CasError::IntegrityError { .. }) => {
                    warn!(hash = %chunk_ref.hash, "Chunk corrupt, deleting and re-fetching");
                    let _ = self.store.delete(&chunk_ref.hash).await;
                    if let Some(fetcher) = &self.fetcher {
                        let new_manifest = fetcher.fetch_file(file_id).await?;
                        self.manifests.write().insert(file_id, new_manifest);
                        self.store.get(&chunk_ref.hash).await?
                    } else {
                        return Err(ReaderError::Cas(CasError::NotFound(
                            chunk_ref.hash.as_hex(),
                        )));
                    }
                }
                Err(CasError::NotFound(_)) => {
                    warn!(hash = %chunk_ref.hash, "Chunk missing, attempting re-fetch");
                    if let Some(fetcher) = &self.fetcher {
                        let new_manifest = fetcher.fetch_file(file_id).await?;
                        self.manifests.write().insert(file_id, new_manifest);
                        self.store.get(&chunk_ref.hash).await?
                    } else {
                        return Err(ReaderError::Cas(CasError::NotFound(
                            chunk_ref.hash.as_hex(),
                        )));
                    }
                }
                Err(e) => return Err(ReaderError::Cas(e)),
            };
            let read_start = if offset > chunk_start {
                (offset - chunk_start) as usize
            } else {
                0
            };
            let read_end = if end < chunk_end {
                (end - chunk_start) as usize
            } else {
                chunk_ref.size as usize
            };
            result.extend_from_slice(&chunk_data[read_start..read_end]);
            chunks_read += 1;
        }
        let bytes_read = result.len() as u64;
        debug!(file_id = ?file_id, offset, size, chunks_read, bytes_read, "read completed");
        Ok(result.freeze())
    }
 }
 #[derive(Debug, thiserror::Error)]
 pub enum ReaderError {
    #[error("Manifest not found for file {0:?}")]
    ManifestNotFound(FileId),
    #[error("Fetch error: {0}")]
    Fetch(#[from] FetchError),
    #[error("CAS error: {0}")]
    Cas(#[from] crate::store::CasError),
 }
 #[cfg(test)]
 mod tests {
    use super::*;
    use crate::store::CasConfig;
    use musicfs_core::ChunkHash;
    use tempfile::TempDir;
    #[tokio::test]
    async fn test_file_reader_simple() {
        let dir = TempDir::new().unwrap();
        let config = CasConfig {
            chunks_dir: dir.path().join("chunks"),
            ..Default::default()
        };
        let store = Arc::new(CasStore::open(config).await.unwrap());
        let data = b"Hello, World!";
        let hash = store.put(data).await.unwrap();
        let reader = FileReader::new(store);
        reader.register_manifest(ChunkManifest {
            file_id: FileId(1),
            total_size: data.len() as u64,
            mtime: 0,
            chunks: vec![ChunkRef {
                hash,
                offset: 0,
                size: data.len() as u32,
            }],
        });
        let result = reader.read(FileId(1), 0, data.len() as u32).await.unwrap();
        assert_eq!(&result[..], data);
    }
    #[tokio::test]
    async fn test_file_reader_partial() {
        let dir = TempDir::new().unwrap();
        let config = CasConfig {
            chunks_dir: dir.path().join("chunks"),
            ..Default::default()
        };
        let store = Arc::new(CasStore::open(config).await.unwrap());
        let data = b"ABCDEFGHIJ";
        let hash = store.put(data).await.unwrap();
        let reader = FileReader::new(store);
        reader.register_manifest(ChunkManifest {
            file_id: FileId(1),
            total_size: data.len() as u64,
            mtime: 0,
            chunks: vec![ChunkRef {
                hash,
                offset: 0,
                size: data.len() as u32,
            }],
        });
        let result = reader.read(FileId(1), 3, 4).await.unwrap();
        assert_eq!(&result[..], b"DEFG");
    }
    #[tokio::test]
    async fn test_file_reader_multi_chunk() {
        let dir = TempDir::new().unwrap();
        let config = CasConfig {
            chunks_dir: dir.path().join("chunks"),
            ..Default::default()
        };
        let store = Arc::new(CasStore::open(config).await.unwrap());
        let chunk1 = b"AAAA";
        let chunk2 = b"BBBB";
        let hash1 = store.put(chunk1).await.unwrap();
        let hash2 = store.put(chunk2).await.unwrap();
        let reader = FileReader::new(store);
        reader.register_manifest(ChunkManifest {
            file_id: FileId(1),
            total_size: 8,
            mtime: 0,
            chunks: vec![
                ChunkRef {
                    hash: hash1,
                    offset: 0,
                    size: 4,
                },
                ChunkRef {
                    hash: hash2,
                    offset: 4,
                    size: 4,
                },
            ],
        });
        let result = reader.read(FileId(1), 2, 4).await.unwrap();
        assert_eq!(&result[..], b"AABB");
    }
    #[tokio::test]
    async fn test_file_reader_eof() {
        let dir = TempDir::new().unwrap();
        let config = CasConfig {
            chunks_dir: dir.path().join("chunks"),
            ..Default::default()
        };
        let store = Arc::new(CasStore::open(config).await.unwrap());
        let data = b"short";
        let hash = store.put(data).await.unwrap();
        let reader = FileReader::new(store);
        reader.register_manifest(ChunkManifest {
            file_id: FileId(1),
            total_size: data.len() as u64,
            mtime: 0,
            chunks: vec![ChunkRef {
                hash,
                offset: 0,
                size: data.len() as u32,
            }],
        });
        let result = reader.read(FileId(1), 100, 10).await.unwrap();
        assert!(result.is_empty());
    }
    #[test]
    fn test_chunk_manifest_serialization() {
        let manifest = ChunkManifest {
            file_id: FileId(42),
            total_size: 1024,
            mtime: 0,
            chunks: vec![ChunkRef {
                hash: ChunkHash::from_bytes(b"test"),
                offset: 0,
                size: 1024,
            }],
        };
        let bytes = manifest.chunks_to_bytes();
        let restored = ChunkManifest::chunks_from_bytes(&bytes).unwrap();
        assert_eq!(restored.len(), 1);
        assert_eq!(restored[0].size, 1024);
    }
 }
@@ -1,396 +0,0 @@
 use crate::chunks::ChunkLocation;
 use bytes::Bytes;
 use musicfs_core::ChunkHash;
 use std::path::{Path, PathBuf};
 use std::sync::atomic::{AtomicU64, Ordering};
 use tokio::fs;
 use tracing::{debug, info, trace, warn};
 #[cfg(feature = "failpoints")]
 use fail::fail_point;
 const DEFAULT_MAX_SIZE_10GB: u64 = 10 * 1024 * 1024 * 1024;
 const DEFAULT_SHARD_LEVELS_256_SUBDIRS: u8 = 2;
 #[derive(Debug, Clone)]
 pub struct CasConfig {
    pub chunks_dir: PathBuf,
    pub max_size: u64,
    pub shard_levels: u8,
 }
 impl Default for CasConfig {
    fn default() -> Self {
        let cache_dir = dirs::cache_dir()
            .unwrap_or_else(|| PathBuf::from(".cache"))
            .join("musicfs")
            .join("chunks");
        Self {
            chunks_dir: cache_dir,
            max_size: DEFAULT_MAX_SIZE_10GB,
            shard_levels: DEFAULT_SHARD_LEVELS_256_SUBDIRS,
        }
    }
 }
 pub struct CasStore {
    config: CasConfig,
    index: sled::Db,
    current_size: AtomicU64,
 }
 impl CasStore {
    pub async fn open(config: CasConfig) -> Result<Self, CasError> {
        fs::create_dir_all(&config.chunks_dir).await?;
        let index_path = config.chunks_dir.join("index.sled");
        let index = match sled::open(&index_path) {
            Ok(db) => db,
            Err(e) => {
                warn!(error = %e, path = ?index_path, "sled index corrupted, attempting recovery");
                match sled::Config::new().path(&index_path).open() {
                    Ok(db) => {
                        info!("sled index repaired successfully");
                        db
                    }
                    Err(repair_err) => {
                        warn!(error = %repair_err, "sled repair failed, recreating index");
                        if index_path.exists() {
                            std::fs::remove_dir_all(&index_path).map_err(CasError::Io)?;
                        }
                        sled::open(&index_path)?
                    }
                }
            }
        };
        let current_size = Self::calculate_size(&config.chunks_dir).await;
        Ok(Self {
            config,
            index,
            current_size: AtomicU64::new(current_size),
        })
    }
    async fn calculate_size(dir: &Path) -> u64 {
        Self::calculate_size_recursive(dir).await
    }
    fn calculate_size_recursive(
        dir: &Path,
    ) -> std::pin::Pin<Box<dyn std::future::Future<Output = u64> + Send + '_>> {
        Box::pin(async move {
            let mut size = 0u64;
            if let Ok(mut entries) = fs::read_dir(dir).await {
                while let Ok(Some(entry)) = entries.next_entry().await {
                    if let Ok(meta) = entry.metadata().await {
                        if meta.is_file() {
                            size += meta.len();
                        } else if meta.is_dir() {
                            // Skip sled index directory
                            let name = entry.file_name();
                            if name != "index.sled" {
                                size += Self::calculate_size_recursive(&entry.path()).await;
                            }
                        }
                    }
                }
            }
            size
        })
    }
    pub async fn put(&self, data: &[u8]) -> Result<ChunkHash, CasError> {
        let hash = ChunkHash::from_bytes(data);
        let path = self.chunk_path(&hash);
        if path.exists() {
            trace!(hash = %hash, size_bytes = data.len(), "dedup hit");
            return Ok(hash);
        }
        if self.config.max_size > 0 {
            let new_size = self.current_size.load(Ordering::SeqCst) + data.len() as u64;
            if new_size > self.config.max_size {
                warn!(
                    current_size = self.current_size.load(Ordering::SeqCst),
                    chunk_size = data.len(),
                    max_size = self.config.max_size,
                    "CAS store full, rejecting write"
                );
                return Err(CasError::StoreFull {
                    current: self.current_size.load(Ordering::SeqCst),
                    max: self.config.max_size,
                });
            }
        }
        if let Some(parent) = path.parent() {
            fs::create_dir_all(parent).await?;
        }
        #[cfg(feature = "failpoints")]
        fail_point!("cas-put-before-write", |_| {
            Err(CasError::Io(std::io::Error::new(
                std::io::ErrorKind::Other,
                "Failpoint: cas-put-before-write",
            )))
        });
        fs::write(&path, data).await?;
        #[cfg(feature = "failpoints")]
        fail_point!("cas-put-after-write-before-index", |_| {
            Err(CasError::Io(std::io::Error::new(
                std::io::ErrorKind::Other,
                "Failpoint: cas-put-after-write-before-index",
            )))
        });
        let location = ChunkLocation {
            path: path.clone(),
            size: data.len() as u32,
        };
        self.index.insert(
            hash.0.as_slice(),
            rmp_serde::to_vec(&location).map_err(|e| CasError::Serialization(e.to_string()))?,
        )?;
        self.current_size
            .fetch_add(data.len() as u64, Ordering::SeqCst);
        debug!(hash = %hash, size_bytes = data.len(), "chunk stored");
        Ok(hash)
    }
    pub async fn get(&self, hash: &ChunkHash) -> Result<Bytes, CasError> {
        let path = self.chunk_path(hash);
        if !path.exists() {
            return Err(CasError::NotFound(hash.as_hex()));
        }
        let data = fs::read(&path).await?;
        if self.config.max_size > 0 {
            self.verify_integrity(hash, &data)?;
        }
        debug!(hash = %hash, size_bytes = data.len(), "chunk retrieved");
        Ok(Bytes::from(data))
    }
    pub fn exists(&self, hash: &ChunkHash) -> bool {
        self.chunk_path(hash).exists()
    }
    fn verify_integrity(&self, expected: &ChunkHash, data: &[u8]) -> Result<(), CasError> {
        let actual = ChunkHash::from_bytes(data);
        if actual != *expected {
            warn!(
                "Chunk integrity failure: expected {}, got {}",
                expected, actual
            );
            return Err(CasError::IntegrityError {
                expected: expected.as_hex(),
                actual: actual.as_hex(),
            });
        }
        Ok(())
    }
    fn chunk_path(&self, hash: &ChunkHash) -> PathBuf {
        let hex = hash.as_hex();
        let mut path = self.config.chunks_dir.clone();
        for i in 0..self.config.shard_levels as usize {
            let start = i * 2;
            let end = start + 2;
            if end <= hex.len() {
                path = path.join(&hex[start..end]);
            }
        }
        path.join(&hex)
    }
    pub async fn delete(&self, hash: &ChunkHash) -> Result<(), CasError> {
        let path = self.chunk_path(hash);
        if path.exists() {
            let meta = fs::metadata(&path).await?;
            fs::remove_file(&path).await?;
            self.index.remove(hash.0.as_slice())?;
            self.current_size.fetch_sub(meta.len(), Ordering::SeqCst);
            debug!(hash = %hash, size_bytes = meta.len(), "chunk deleted");
        }
        Ok(())
    }
    pub fn current_size(&self) -> u64 {
        self.current_size.load(Ordering::SeqCst)
    }
    pub fn max_size(&self) -> u64 {
        self.config.max_size
    }
    pub fn list_chunks(&self) -> impl Iterator<Item = ChunkHash> + '_ {
        self.index.iter().filter_map(|r| {
            r.ok().and_then(|(k, _)| {
                if k.len() == 8 {
                    let mut arr = [0u8; 8];
                    arr.copy_from_slice(&k);
                    Some(ChunkHash(arr))
                } else {
                    None
                }
            })
        })
    }
    pub fn dedup_stats(&self) -> DedupStats {
        let chunks_stored = self.index.len() as u64;
        let size_bytes = self.current_size();
        DedupStats {
            chunks_stored,
            chunks_unique: chunks_stored,
            size_bytes,
            size_limit_bytes: self.config.max_size,
        }
    }
 }
 #[derive(Debug, Clone)]
 pub struct DedupStats {
    pub chunks_stored: u64,
    pub chunks_unique: u64,
    pub size_bytes: u64,
    pub size_limit_bytes: u64,
 }
 impl DedupStats {
    pub fn dedup_ratio(&self) -> f64 {
        if self.chunks_stored == 0 {
            0.0
        } else {
            1.0 - (self.chunks_unique as f64 / self.chunks_stored as f64)
        }
    }
 }
 #[derive(Debug, thiserror::Error)]
 pub enum CasError {
    #[error("IO error: {0}")]
    Io(#[from] std::io::Error),
    #[error("Sled error: {0}")]
    Sled(#[from] sled::Error),
    #[error("Chunk not found: {0}")]
    NotFound(String),
    #[error("Integrity error: expected {expected}, got {actual}")]
    IntegrityError { expected: String, actual: String },
    #[error("Serialization error: {0}")]
    Serialization(String),
    #[error("Store full: {current} / {max} bytes")]
    StoreFull { current: u64, max: u64 },
 }
 #[cfg(test)]
 mod tests {
    use super::*;
    use tempfile::TempDir;
    async fn test_store() -> (CasStore, TempDir) {
        let dir = TempDir::new().unwrap();
        let config = CasConfig {
            chunks_dir: dir.path().join("chunks"),
            max_size: 1024 * 1024,
            shard_levels: 2,
        };
        let store = CasStore::open(config).await.unwrap();
        (store, dir)
    }
    #[tokio::test]
    async fn test_cas_put_get() {
        let (store, _dir) = test_store().await;
        let data = b"test chunk data";
        let hash = store.put(data).await.unwrap();
        let retrieved = store.get(&hash).await.unwrap();
        assert_eq!(&retrieved[..], data);
    }
    #[tokio::test]
    async fn test_cas_dedup() {
        let (store, _dir) = test_store().await;
        let data = b"duplicate data";
        let hash1 = store.put(data).await.unwrap();
        let hash2 = store.put(data).await.unwrap();
        assert_eq!(hash1, hash2);
    }
    #[tokio::test]
    async fn test_cas_exists() {
        let (store, _dir) = test_store().await;
        let data = b"existence test";
        let hash = store.put(data).await.unwrap();
        assert!(store.exists(&hash));
        let fake_hash = ChunkHash::from_bytes(b"nonexistent");
        assert!(!store.exists(&fake_hash));
    }
    #[tokio::test]
    async fn test_cas_delete() {
        let (store, _dir) = test_store().await;
        let data = b"delete me";
        let hash = store.put(data).await.unwrap();
        assert!(store.exists(&hash));
        store.delete(&hash).await.unwrap();
        assert!(!store.exists(&hash));
    }
    #[tokio::test]
    async fn test_cas_integrity() {
        let (store, _dir) = test_store().await;
        let data = b"integrity test";
        let hash = store.put(data).await.unwrap();
        let retrieved = store.get(&hash).await.unwrap();
        assert_eq!(&retrieved[..], data);
    }
    #[tokio::test]
    async fn test_cas_dedup_stats() {
        let (store, _dir) = test_store().await;
        store.put(b"chunk1").await.unwrap();
        store.put(b"chunk2").await.unwrap();
        store.put(b"chunk1").await.unwrap();
        let stats = store.dedup_stats();
        assert_eq!(stats.chunks_stored, 2);
        assert_eq!(stats.chunks_unique, 2);
    }
 }
@@ -1,203 +0,0 @@
 use musicfs_cache::TreeBuilder;
 use musicfs_cas::{CasConfig, CasStore, ChunkManifest, ChunkRef, ContentFetcher, FileReader};
 use musicfs_core::{FileId, FileMeta, OriginId, RealPath, VirtualPath};
 use musicfs_origins::LocalOrigin;
 use std::path::PathBuf;
 use std::sync::{Arc, RwLock};
 use std::time::SystemTime;
 use tempfile::TempDir;
 fn make_file_meta(id: i64, vpath: &str, size: u64) -> FileMeta {
    FileMeta {
        id: FileId(id),
        virtual_path: VirtualPath::new(vpath),
        real_path: RealPath {
            origin_id: OriginId::from("test"),
            path: PathBuf::from("/test"),
        },
        size,
        mtime: SystemTime::now(),
        content_hash: None,
        audio: None,
    }
 }
 #[tokio::test]
 async fn test_cas_and_tree_integration() {
    let dir = TempDir::new().unwrap();
    let config = CasConfig {
        chunks_dir: dir.path().join("chunks"),
        ..Default::default()
    };
    let store = Arc::new(CasStore::open(config).await.unwrap());
    let file_data = b"This is test audio file content for testing.";
    let chunk_hash = store.put(file_data).await.unwrap();
    let mut builder = TreeBuilder::new();
    builder.add_file(&make_file_meta(
        1,
        "/Artist/Album/Track.flac",
        file_data.len() as u64,
    ));
    let _tree = Arc::new(RwLock::new(builder.build()));
    let reader = Arc::new(FileReader::new(store.clone()));
    reader.register_manifest(ChunkManifest {
        file_id: FileId(1),
        total_size: file_data.len() as u64,
        mtime: 0,
        chunks: vec![ChunkRef {
            hash: chunk_hash,
            offset: 0,
            size: file_data.len() as u32,
        }],
    });
    let result = reader
        .read(FileId(1), 0, file_data.len() as u32)
        .await
        .unwrap();
    assert_eq!(&result[..], file_data);
 }
 #[tokio::test]
 async fn test_cache_persistence() {
    let dir = TempDir::new().unwrap();
    let config = CasConfig {
        chunks_dir: dir.path().join("chunks"),
        ..Default::default()
    };
    let data = b"persistent data";
    let hash = {
        let store = CasStore::open(config.clone()).await.unwrap();
        store.put(data).await.unwrap()
    };
    let store = CasStore::open(config).await.unwrap();
    let retrieved = store.get(&hash).await.unwrap();
    assert_eq!(&retrieved[..], data);
 }
 #[tokio::test]
 async fn test_deduplication() {
    let dir = TempDir::new().unwrap();
    let config = CasConfig {
        chunks_dir: dir.path().join("chunks"),
        ..Default::default()
    };
    let store = CasStore::open(config).await.unwrap();
    let data = b"duplicate this content";
    let hash1 = store.put(data).await.unwrap();
    let size_after_first = store.current_size();
    let hash2 = store.put(data).await.unwrap();
    let size_after_second = store.current_size();
    assert_eq!(hash1, hash2);
    assert_eq!(size_after_first, size_after_second);
 }
 #[tokio::test]
 async fn test_fetcher_cache_miss_flow() {
    let origin_dir = TempDir::new().unwrap();
    let cas_dir = TempDir::new().unwrap();
    let test_content = b"This is audio content that will be fetched on cache miss";
    let test_file_path = origin_dir.path().join("test.flac");
    std::fs::write(&test_file_path, test_content).unwrap();
    let config = CasConfig {
        chunks_dir: cas_dir.path().join("chunks"),
        ..Default::default()
    };
    let store = Arc::new(CasStore::open(config).await.unwrap());
    let origin_id = OriginId::from("test-origin");
    let origin = Arc::new(LocalOrigin::new(
        origin_id.clone(),
        origin_dir.path().to_path_buf(),
    ));
    let fetcher = ContentFetcher::new(store.clone());
    fetcher.register_origin(origin);
    let file_id = FileId(42);
    let file_meta = FileMeta {
        id: file_id,
        virtual_path: VirtualPath::new("/Artist/Album/test.flac"),
        real_path: RealPath {
            origin_id,
            path: PathBuf::from("/test.flac"),
        },
        size: test_content.len() as u64,
        mtime: SystemTime::now(),
        content_hash: None,
        audio: None,
    };
    fetcher.register_file(file_meta);
    let manifest = fetcher.fetch_file(file_id).await.unwrap();
    assert_eq!(manifest.file_id, file_id);
    assert_eq!(manifest.total_size, test_content.len() as u64);
    assert_eq!(manifest.chunks.len(), 1);
    let chunk_data = store.get(&manifest.chunks[0].hash).await.unwrap();
    assert_eq!(&chunk_data[..], test_content);
 }
 #[tokio::test]
 async fn test_reader_with_fetcher_integration() {
    let origin_dir = TempDir::new().unwrap();
    let cas_dir = TempDir::new().unwrap();
    let test_content = b"Audio file content for reader integration test";
    let test_file_path = origin_dir.path().join("song.flac");
    std::fs::write(&test_file_path, test_content).unwrap();
    let config = CasConfig {
        chunks_dir: cas_dir.path().join("chunks"),
        ..Default::default()
    };
    let store = Arc::new(CasStore::open(config).await.unwrap());
    let origin_id = OriginId::from("local");
    let origin = Arc::new(LocalOrigin::new(
        origin_id.clone(),
        origin_dir.path().to_path_buf(),
    ));
    let fetcher = ContentFetcher::new(store.clone());
    fetcher.register_origin(origin);
    let file_id = FileId(100);
    let file_meta = FileMeta {
        id: file_id,
        virtual_path: VirtualPath::new("/Test/song.flac"),
        real_path: RealPath {
            origin_id,
            path: PathBuf::from("/song.flac"),
        },
        size: test_content.len() as u64,
        mtime: SystemTime::now(),
        content_hash: None,
        audio: None,
    };
    fetcher.register_file(file_meta);
    let reader = FileReader::with_fetcher(store, Arc::new(fetcher));
    let result = reader
        .read(file_id, 0, test_content.len() as u32)
        .await
        .unwrap();
    assert_eq!(&result[..], test_content);
    let result2 = reader.read(file_id, 0, 10).await.unwrap();
    assert_eq!(&result2[..], &test_content[..10]);
 }
@@ -1,37 +0,0 @@
 [package]
 name = "musicfs-cli"
 version.workspace = true
 edition.workspace = true
 [[bin]]
 name = "musicfs"
 path = "src/main.rs"
 [dependencies]
 musicfs-core.path = "../musicfs-core"
 musicfs-origins.path = "../musicfs-origins"
 musicfs-cache.path = "../musicfs-cache"
 musicfs-cas.path = "../musicfs-cas"
 musicfs-fuse.path = "../musicfs-fuse"
 musicfs-metadata.path = "../musicfs-metadata"
 musicfs-grpc.path = "../musicfs-grpc"
 clap.workspace = true
 tokio.workspace = true
 tokio-util.workspace = true
 tokio-stream.workspace = true
 tonic.workspace = true
 tracing.workspace = true
 tracing-subscriber.workspace = true
 tracing-appender.workspace = true
 anyhow.workspace = true
 dirs.workspace = true
 toml.workspace = true
 parking_lot.workspace = true
 libc.workspace = true
 serde.workspace = true
 serde_json.workspace = true
 [target.'cfg(target_os = "linux")'.dependencies]
 tracing-journald.workspace = true
 sd-notify.workspace = true
@@ -1 +0,0 @@
 #![allow(dead_code)]
@@ -1,638 +0,0 @@
 //! CLI subcommands for metadata overlay management.
 use anyhow::{Context, Result};
 use clap::Subcommand;
 use musicfs_grpc::proto::musicfs::v1::{
    metadata_service_client::MetadataServiceClient, ClearOverlayRequest, GetMetadataRequest,
    ImportMetadataRequest, UpdateMetadataRequest,
 };
 use serde::{Deserialize, Serialize};
 use std::collections::HashMap;
 use std::path::PathBuf;
 use tokio_stream::StreamExt;
 use tonic::transport::Channel;
 use tracing::{debug, info};
 /// Metadata overlay management subcommands.
 #[derive(Subcommand)]
 pub enum MetadataCommand {
    /// Get metadata for a file (prints as JSON)
    Get {
        /// Virtual path of the file
        path: String,
        /// Print only a specific field
        #[arg(long)]
        field: Option<String>,
    },
    /// Set metadata fields for a file
    Set {
        /// Virtual path of the file
        path: String,
        /// Track title
        #[arg(long)]
        title: Option<String>,
        /// Artist name
        #[arg(long)]
        artist: Option<String>,
        /// Album name
        #[arg(long)]
        album: Option<String>,
        /// Album artist
        #[arg(long)]
        album_artist: Option<String>,
        /// Track number
        #[arg(long)]
        track: Option<u32>,
        /// Disc number
        #[arg(long)]
        disc: Option<u32>,
        /// Genre
        #[arg(long)]
        genre: Option<String>,
        /// Date (YYYY-MM-DD or YYYY)
        #[arg(long)]
        date: Option<String>,
        /// Composer
        #[arg(long)]
        composer: Option<String>,
        /// Comment
        #[arg(long)]
        comment: Option<String>,
        /// Set metadata from JSON string
        #[arg(long, conflicts_with_all = ["title", "artist", "album", "album_artist", "track", "disc", "genre", "date", "composer", "comment"])]
        json: Option<String>,
    },
    /// Clear metadata overlay (revert to original)
    Clear {
        /// Virtual path of the file
        path: String,
    },
    /// Show difference between current and original metadata
    Diff {
        /// Virtual path of the file
        path: String,
    },
    /// Import metadata from CSV or JSON file
    Import {
        /// Import file path
        file: PathBuf,
        /// File format (csv or json, auto-detected if not specified)
        #[arg(long)]
        format: Option<String>,
    },
    /// Export metadata to file
    Export {
        /// Output file path
        #[arg(long, short)]
        output: PathBuf,
        /// Filter by search query
        #[arg(long)]
        query: Option<String>,
        /// Output format (csv or json, auto-detected from extension)
        #[arg(long)]
        format: Option<String>,
    },
 }
 /// Metadata fields for JSON serialization.
 #[derive(Debug, Clone, Serialize, Deserialize, Default)]
 pub struct MetadataFields {
    #[serde(skip_serializing_if = "Option::is_none")]
    pub file_id: Option<i64>,
    #[serde(skip_serializing_if = "Option::is_none")]
    pub title: Option<String>,
    #[serde(skip_serializing_if = "Option::is_none")]
    pub artist: Option<String>,
    #[serde(skip_serializing_if = "Option::is_none")]
    pub album: Option<String>,
    #[serde(skip_serializing_if = "Option::is_none")]
    pub album_artist: Option<String>,
    #[serde(skip_serializing_if = "Option::is_none")]
    pub year: Option<u32>,
    #[serde(skip_serializing_if = "Option::is_none")]
    pub track: Option<u32>,
    #[serde(skip_serializing_if = "Option::is_none")]
    pub disc: Option<u32>,
    #[serde(skip_serializing_if = "Option::is_none")]
    pub genre: Option<String>,
    #[serde(skip_serializing_if = "Option::is_none")]
    pub format: Option<String>,
    #[serde(skip_serializing_if = "Option::is_none")]
    pub duration_ms: Option<u64>,
    #[serde(skip_serializing_if = "Option::is_none")]
    pub bitrate: Option<u64>,
    #[serde(skip_serializing_if = "Option::is_none")]
    pub track_total: Option<u32>,
    #[serde(skip_serializing_if = "Option::is_none")]
    pub disc_total: Option<u32>,
    #[serde(skip_serializing_if = "Option::is_none")]
    pub date: Option<String>,
    #[serde(skip_serializing_if = "Option::is_none")]
    pub composer: Option<String>,
    #[serde(skip_serializing_if = "Option::is_none")]
    pub comment: Option<String>,
    #[serde(skip_serializing_if = "Option::is_none")]
    pub lyrics: Option<String>,
    #[serde(skip_serializing_if = "Option::is_none")]
    pub copyright: Option<String>,
    #[serde(skip_serializing_if = "Option::is_none")]
    pub compilation: Option<bool>,
    #[serde(skip_serializing_if = "Option::is_none")]
    pub artist_sort: Option<String>,
    #[serde(skip_serializing_if = "Option::is_none")]
    pub album_artist_sort: Option<String>,
    #[serde(skip_serializing_if = "Option::is_none")]
    pub album_sort: Option<String>,
    #[serde(skip_serializing_if = "Option::is_none")]
    pub title_sort: Option<String>,
    #[serde(skip_serializing_if = "Option::is_none")]
    pub mb_recording_id: Option<String>,
    #[serde(skip_serializing_if = "Option::is_none")]
    pub mb_album_id: Option<String>,
    #[serde(skip_serializing_if = "Option::is_none")]
    pub mb_artist_id: Option<String>,
    #[serde(skip_serializing_if = "Option::is_none")]
    pub mb_album_artist_id: Option<String>,
    #[serde(skip_serializing_if = "Option::is_none")]
    pub mb_release_group_id: Option<String>,
    #[serde(skip_serializing_if = "Option::is_none")]
    pub replaygain_track_gain: Option<f32>,
    #[serde(skip_serializing_if = "Option::is_none")]
    pub replaygain_track_peak: Option<f32>,
    #[serde(skip_serializing_if = "Option::is_none")]
    pub replaygain_album_gain: Option<f32>,
    #[serde(skip_serializing_if = "Option::is_none")]
    pub replaygain_album_peak: Option<f32>,
    #[serde(skip_serializing_if = "Option::is_none")]
    pub channels: Option<u32>,
    #[serde(skip_serializing_if = "Option::is_none")]
    pub bits_per_sample: Option<u32>,
    #[serde(skip_serializing_if = "Option::is_none")]
    pub encoder: Option<String>,
    #[serde(skip_serializing_if = "HashMap::is_empty", default)]
    pub custom_tags: HashMap<String, String>,
 }
 /// Execute a metadata subcommand.
 pub async fn run_metadata(command: MetadataCommand, endpoint: &str) -> Result<()> {
    match command {
        MetadataCommand::Get { path, field } => run_get(endpoint, &path, field.as_deref()).await,
        MetadataCommand::Set {
            path,
            title,
            artist,
            album,
            album_artist,
            track,
            disc,
            genre,
            date,
            composer,
            comment,
            json,
        } => {
            run_set(
                endpoint,
                &path,
                title,
                artist,
                album,
                album_artist,
                track,
                disc,
                genre,
                date,
                composer,
                comment,
                json,
            )
            .await
        }
        MetadataCommand::Clear { path } => run_clear(endpoint, &path).await,
        MetadataCommand::Diff { path } => run_diff(endpoint, &path).await,
        MetadataCommand::Import { file, format } => run_import(endpoint, &file, format).await,
        MetadataCommand::Export {
            output,
            query,
            format,
        } => run_export(endpoint, &output, query, format).await,
    }
 }
 async fn connect(endpoint: &str) -> Result<MetadataServiceClient<Channel>> {
    MetadataServiceClient::connect(endpoint.to_string())
        .await
        .context("Failed to connect to gRPC server")
 }
 async fn run_get(endpoint: &str, path: &str, field: Option<&str>) -> Result<()> {
    let mut client = connect(endpoint).await?;
    let response = client
        .get_metadata(GetMetadataRequest {
            virtual_path: path.to_string(),
        })
        .await
        .context("GetMetadata RPC failed")?;
    let meta = response.into_inner();
    let fields = MetadataFields {
        file_id: Some(meta.file_id),
        title: meta.title,
        artist: meta.artist,
        album: meta.album,
        album_artist: meta.album_artist,
        year: meta.year,
        track: meta.track,
        disc: meta.disc,
        genre: meta.genre,
        format: meta.format,
        duration_ms: meta.duration_ms,
        bitrate: meta.bitrate,
        track_total: meta.track_total,
        disc_total: meta.disc_total,
        date: meta.date,
        composer: meta.composer,
        comment: meta.comment,
        lyrics: meta.lyrics,
        copyright: meta.copyright,
        compilation: meta.compilation,
        artist_sort: meta.artist_sort,
        album_artist_sort: meta.album_artist_sort,
        album_sort: meta.album_sort,
        title_sort: meta.title_sort,
        mb_recording_id: meta.mb_recording_id,
        mb_album_id: meta.mb_album_id,
        mb_artist_id: meta.mb_artist_id,
        mb_album_artist_id: meta.mb_album_artist_id,
        mb_release_group_id: meta.mb_release_group_id,
        replaygain_track_gain: meta.replaygain_track_gain,
        replaygain_track_peak: meta.replaygain_track_peak,
        replaygain_album_gain: meta.replaygain_album_gain,
        replaygain_album_peak: meta.replaygain_album_peak,
        channels: meta.channels,
        bits_per_sample: meta.bits_per_sample,
        encoder: meta.encoder,
        custom_tags: meta.custom_tags,
    };
    if let Some(field_name) = field {
        let value = get_field_value(&fields, field_name)?;
        println!("{}", value);
    } else {
        let json = serde_json::to_string_pretty(&fields)?;
        println!("{}", json);
    }
    Ok(())
 }
 fn get_field_value(fields: &MetadataFields, field_name: &str) -> Result<String> {
    let value = match field_name {
        "file_id" => fields.file_id.map(|v| v.to_string()),
        "title" => fields.title.clone(),
        "artist" => fields.artist.clone(),
        "album" => fields.album.clone(),
        "album_artist" => fields.album_artist.clone(),
        "year" => fields.year.map(|v| v.to_string()),
        "track" => fields.track.map(|v| v.to_string()),
        "disc" => fields.disc.map(|v| v.to_string()),
        "genre" => fields.genre.clone(),
        "format" => fields.format.clone(),
        "duration_ms" => fields.duration_ms.map(|v| v.to_string()),
        "bitrate" => fields.bitrate.map(|v| v.to_string()),
        "track_total" => fields.track_total.map(|v| v.to_string()),
        "disc_total" => fields.disc_total.map(|v| v.to_string()),
        "date" => fields.date.clone(),
        "composer" => fields.composer.clone(),
        "comment" => fields.comment.clone(),
        "lyrics" => fields.lyrics.clone(),
        "copyright" => fields.copyright.clone(),
        "compilation" => fields.compilation.map(|v| v.to_string()),
        "artist_sort" => fields.artist_sort.clone(),
        "album_artist_sort" => fields.album_artist_sort.clone(),
        "album_sort" => fields.album_sort.clone(),
        "title_sort" => fields.title_sort.clone(),
        "mb_recording_id" => fields.mb_recording_id.clone(),
        "mb_album_id" => fields.mb_album_id.clone(),
        "mb_artist_id" => fields.mb_artist_id.clone(),
        "mb_album_artist_id" => fields.mb_album_artist_id.clone(),
        "mb_release_group_id" => fields.mb_release_group_id.clone(),
        "replaygain_track_gain" => fields.replaygain_track_gain.map(|v| v.to_string()),
        "replaygain_track_peak" => fields.replaygain_track_peak.map(|v| v.to_string()),
        "replaygain_album_gain" => fields.replaygain_album_gain.map(|v| v.to_string()),
        "replaygain_album_peak" => fields.replaygain_album_peak.map(|v| v.to_string()),
        "channels" => fields.channels.map(|v| v.to_string()),
        "bits_per_sample" => fields.bits_per_sample.map(|v| v.to_string()),
        "encoder" => fields.encoder.clone(),
        _ => return Err(anyhow::anyhow!("Unknown field: {}", field_name)),
    };
    Ok(value.unwrap_or_else(|| "null".to_string()))
 }
 #[allow(clippy::too_many_arguments)]
 async fn run_set(
    endpoint: &str,
    path: &str,
    title: Option<String>,
    artist: Option<String>,
    album: Option<String>,
    album_artist: Option<String>,
    track: Option<u32>,
    disc: Option<u32>,
    genre: Option<String>,
    date: Option<String>,
    composer: Option<String>,
    comment: Option<String>,
    json: Option<String>,
 ) -> Result<()> {
    let mut client = connect(endpoint).await?;
    let get_response = client
        .get_metadata(GetMetadataRequest {
            virtual_path: path.to_string(),
        })
        .await
        .context("Failed to get file metadata")?;
    let file_id = get_response.into_inner().file_id;
    let request = if let Some(json_str) = json {
        let fields: MetadataFields =
            serde_json::from_str(&json_str).context("Failed to parse JSON metadata")?;
        UpdateMetadataRequest {
            file_id,
            title: fields.title,
            artist: fields.artist,
            album: fields.album,
            album_artist: fields.album_artist,
            track_number: fields.track,
            disc_number: fields.disc,
            genre: fields.genre,
            date: fields.date,
            composer: fields.composer,
            comment: fields.comment,
            lyrics: fields.lyrics,
            copyright: fields.copyright,
            compilation: fields.compilation,
            artist_sort: fields.artist_sort,
            album_artist_sort: fields.album_artist_sort,
            album_sort: fields.album_sort,
            title_sort: fields.title_sort,
            mb_recording_id: fields.mb_recording_id,
            mb_album_id: fields.mb_album_id,
            mb_artist_id: fields.mb_artist_id,
            replaygain_track_gain: fields.replaygain_track_gain,
            replaygain_track_peak: fields.replaygain_track_peak,
            replaygain_album_gain: fields.replaygain_album_gain,
            replaygain_album_peak: fields.replaygain_album_peak,
            label: None,
            album_type: None,
            cover_url: None,
            custom_tags: fields.custom_tags,
        }
    } else {
        UpdateMetadataRequest {
            file_id,
            title,
            artist,
            album,
            album_artist,
            track_number: track,
            disc_number: disc,
            genre,
            date,
            composer,
            comment,
            lyrics: None,
            copyright: None,
            compilation: None,
            artist_sort: None,
            album_artist_sort: None,
            album_sort: None,
            title_sort: None,
            mb_recording_id: None,
            mb_album_id: None,
            mb_artist_id: None,
            replaygain_track_gain: None,
            replaygain_track_peak: None,
            replaygain_album_gain: None,
            replaygain_album_peak: None,
            label: None,
            album_type: None,
            cover_url: None,
            custom_tags: HashMap::new(),
        }
    };
    let response = client
        .update_metadata(request)
        .await
        .context("UpdateMetadata RPC failed")?;
    let result = response.into_inner();
    if result.success {
        info!(file_id = result.file_id, "Metadata updated successfully");
        println!("Metadata updated for file_id={}", result.file_id);
    } else {
        let msg = result
            .error_message
            .unwrap_or_else(|| "Unknown error".to_string());
        anyhow::bail!("Failed to update metadata: {}", msg);
    }
    Ok(())
 }
 async fn run_clear(endpoint: &str, path: &str) -> Result<()> {
    let mut client = connect(endpoint).await?;
    let get_response = client
        .get_metadata(GetMetadataRequest {
            virtual_path: path.to_string(),
        })
        .await
        .context("Failed to get file metadata")?;
    let file_id = get_response.into_inner().file_id;
    let response = client
        .clear_overlay(ClearOverlayRequest { file_id })
        .await
        .context("ClearOverlay RPC failed")?;
    let result = response.into_inner();
    if result.success {
        info!(file_id = result.file_id, "Overlay cleared successfully");
        println!("Metadata overlay cleared for file_id={}", result.file_id);
    } else {
        let msg = result
            .error_message
            .unwrap_or_else(|| "Unknown error".to_string());
        anyhow::bail!("Failed to clear overlay: {}", msg);
    }
    Ok(())
 }
 async fn run_diff(endpoint: &str, path: &str) -> Result<()> {
    let mut client = connect(endpoint).await?;
    let response = client
        .get_metadata(GetMetadataRequest {
            virtual_path: path.to_string(),
        })
        .await
        .context("GetMetadata RPC failed")?;
    let meta = response.into_inner();
    debug!(file_id = meta.file_id, "Retrieved metadata for diff");
    println!("Current metadata for: {}", path);
    println!("---");
    let fields = MetadataFields {
        file_id: Some(meta.file_id),
        title: meta.title,
        artist: meta.artist,
        album: meta.album,
        album_artist: meta.album_artist,
        year: meta.year,
        track: meta.track,
        disc: meta.disc,
        genre: meta.genre,
        format: meta.format,
        duration_ms: meta.duration_ms,
        bitrate: meta.bitrate,
        track_total: meta.track_total,
        disc_total: meta.disc_total,
        date: meta.date,
        composer: meta.composer,
        comment: meta.comment,
        lyrics: meta.lyrics,
        copyright: meta.copyright,
        compilation: meta.compilation,
        artist_sort: meta.artist_sort,
        album_artist_sort: meta.album_artist_sort,
        album_sort: meta.album_sort,
        title_sort: meta.title_sort,
        mb_recording_id: meta.mb_recording_id,
        mb_album_id: meta.mb_album_id,
        mb_artist_id: meta.mb_artist_id,
        mb_album_artist_id: meta.mb_album_artist_id,
        mb_release_group_id: meta.mb_release_group_id,
        replaygain_track_gain: meta.replaygain_track_gain,
        replaygain_track_peak: meta.replaygain_track_peak,
        replaygain_album_gain: meta.replaygain_album_gain,
        replaygain_album_peak: meta.replaygain_album_peak,
        channels: meta.channels,
        bits_per_sample: meta.bits_per_sample,
        encoder: meta.encoder,
        custom_tags: meta.custom_tags,
    };
    let json = serde_json::to_string_pretty(&fields)?;
    println!("{}", json);
    println!("---");
    println!("Note: Original metadata comparison requires re-parsing the source file.");
    println!("Use 'musicfs metadata clear <path>' to revert to original metadata.");
    Ok(())
 }
 async fn run_import(endpoint: &str, file: &PathBuf, format: Option<String>) -> Result<()> {
    let mut client = connect(endpoint).await?;
    let file_format = format.or_else(|| {
        file.extension()
            .and_then(|e| e.to_str())
            .map(|s| s.to_lowercase())
    });
    let source_path = file
        .canonicalize()
        .unwrap_or_else(|_| file.clone())
        .to_string_lossy()
        .to_string();
    info!(source_path = %source_path, format = ?file_format, "Starting metadata import");
    let response = client
        .import_metadata(ImportMetadataRequest {
            source_path,
            format: file_format,
        })
        .await
        .context("ImportMetadata RPC failed")?;
    let mut stream = response.into_inner();
    let mut last_imported = 0u32;
    let mut last_total = 0u32;
    let mut errors = Vec::new();
    while let Some(progress) = stream.next().await {
        let progress = progress.context("Stream error")?;
        last_imported = progress.imported;
        last_total = progress.total;
        if let Some(ref err) = progress.error_message {
            let file = progress.current_file.as_deref().unwrap_or("unknown");
            errors.push(format!("{}: {}", file, err));
        }
        if let Some(ref current) = progress.current_file {
            print!(
                "\rImporting: {}/{} - {}",
                progress.imported, progress.total, current
            );
            std::io::Write::flush(&mut std::io::stdout())?;
        }
    }
    println!();
    println!(
        "Import complete: {}/{} files imported",
        last_imported, last_total
    );
    if !errors.is_empty() {
        println!("\nErrors ({}):", errors.len());
        for err in errors.iter().take(10) {
            println!("  - {}", err);
        }
        if errors.len() > 10 {
            println!("  ... and {} more", errors.len() - 10);
        }
    }
    Ok(())
 }
 async fn run_export(
    _endpoint: &str,
    output: &PathBuf,
    query: Option<String>,
    format: Option<String>,
 ) -> Result<()> {
    let output_format = format.or_else(|| {
        output
            .extension()
            .and_then(|e| e.to_str())
            .map(|s| s.to_lowercase())
    });
    println!("Export metadata to: {}", output.display());
    if let Some(ref q) = query {
        println!("Filter query: {}", q);
    }
    println!("Format: {}", output_format.as_deref().unwrap_or("json"));
    println!();
    println!("Note: Export requires file listing capability.");
    println!("This feature requires integration with the Search service.");
    println!(
        "Use 'musicfs search <query>' to find files, then 'musicfs metadata get <path>' for each."
    );
    Ok(())
 }
@@ -1,18 +0,0 @@
 [package]
 name = "musicfs-core"
 version.workspace = true
 edition.workspace = true
 [dependencies]
 thiserror.workspace = true
 serde.workspace = true
 serde_json.workspace = true
 toml.workspace = true
 tokio = { workspace = true, features = ["sync"] }
 tracing.workspace = true
 xxhash-rust.workspace = true
 hex.workspace = true
 parking_lot.workspace = true
 [dev-dependencies]
 tempfile.workspace = true
@@ -1,239 +0,0 @@
 use crate::OriginId;
 use serde::{Deserialize, Serialize};
 use std::collections::HashMap;
 use std::path::PathBuf;
 #[derive(Debug, Clone, Serialize, Deserialize)]
 pub struct Config {
    pub mount_point: PathBuf,
    pub cache_dir: PathBuf,
    pub origins: Vec<OriginConfig>,
    #[serde(default)]
    pub cache: CacheConfig,
    #[serde(default)]
    pub health: HealthConfig,
    #[serde(default)]
    pub logging: LoggingConfig,
 }
 #[derive(Debug, Clone, Serialize, Deserialize)]
 pub struct OriginConfig {
    pub id: String,
    pub origin_type: OriginType,
    pub priority: u8,
    #[serde(default = "default_enabled")]
    pub enabled: bool,
    #[serde(flatten)]
    pub settings: HashMap<String, toml::Value>,
 }
 fn default_enabled() -> bool {
    true
 }
 #[derive(Debug, Clone, Copy, Serialize, Deserialize, PartialEq, Eq, Hash)]
 #[serde(rename_all = "lowercase")]
 pub enum OriginType {
    Local,
    Nfs,
    Smb,
    S3,
    Sftp,
 }
 #[derive(Debug, Clone, Serialize, Deserialize)]
 pub struct CacheConfig {
    #[serde(default = "default_metadata_cache_mb")]
    pub metadata_cache_mb: u64,
    #[serde(default = "default_content_cache_gb")]
    pub content_cache_gb: u64,
 }
 impl Default for CacheConfig {
    fn default() -> Self {
        Self {
            metadata_cache_mb: default_metadata_cache_mb(),
            content_cache_gb: default_content_cache_gb(),
        }
    }
 }
 fn default_metadata_cache_mb() -> u64 {
    100
 }
 fn default_content_cache_gb() -> u64 {
    10
 }
 #[derive(Debug, Clone, Serialize, Deserialize)]
 pub struct HealthConfig {
    #[serde(default = "default_check_interval_secs")]
    pub check_interval_secs: u64,
    #[serde(default = "default_timeout_ms")]
    pub timeout_ms: u64,
    #[serde(default = "default_unhealthy_threshold")]
    pub unhealthy_threshold: u32,
    #[serde(default)]
    pub per_origin_thresholds: HashMap<OriginType, u32>,
 }
 impl Default for HealthConfig {
    fn default() -> Self {
        let mut per_origin = HashMap::new();
        per_origin.insert(OriginType::Local, 1);
        per_origin.insert(OriginType::Nfs, 3);
        per_origin.insert(OriginType::Smb, 3);
        per_origin.insert(OriginType::S3, 3);
        per_origin.insert(OriginType::Sftp, 3);
        Self {
            check_interval_secs: default_check_interval_secs(),
            timeout_ms: default_timeout_ms(),
            unhealthy_threshold: default_unhealthy_threshold(),
            per_origin_thresholds: per_origin,
        }
    }
 }
 impl HealthConfig {
    pub fn threshold_for(&self, origin_type: OriginType) -> u32 {
        self.per_origin_thresholds
            .get(&origin_type)
            .copied()
            .unwrap_or(self.unhealthy_threshold)
    }
 }
 fn default_check_interval_secs() -> u64 {
    30
 }
 fn default_timeout_ms() -> u64 {
    5000
 }
 fn default_unhealthy_threshold() -> u32 {
    3
 }
 #[derive(Debug, Clone, Serialize, Deserialize)]
 pub struct LoggingConfig {
    #[serde(default = "default_log_dir")]
    pub log_dir: PathBuf,
    #[serde(default)]
    pub json_output: bool,
    #[serde(default = "default_true")]
    pub journald: bool,
    #[serde(default = "default_log_level")]
    pub level: String,
    #[serde(default = "default_sample_rate")]
    pub trace_sample_rate: f32,
 }
 impl Default for LoggingConfig {
    fn default() -> Self {
        Self {
            log_dir: default_log_dir(),
            json_output: false,
            journald: true,
            level: default_log_level(),
            trace_sample_rate: default_sample_rate(),
        }
    }
 }
 fn default_log_dir() -> PathBuf {
    PathBuf::from("/var/log/musicfs")
 }
 fn default_log_level() -> String {
    "musicfs=info,warn".to_string()
 }
 fn default_true() -> bool {
    true
 }
 fn default_sample_rate() -> f32 {
    1.0
 }
 impl Config {
    pub fn from_file(path: &std::path::Path) -> Result<Self, ConfigError> {
        let content =
            std::fs::read_to_string(path).map_err(|e| ConfigError::Read(e.to_string()))?;
        toml::from_str(&content).map_err(|e| ConfigError::Parse(e.to_string()))
    }
    pub fn origin_id(&self, id: &str) -> Option<OriginId> {
        self.origins
            .iter()
            .find(|o| o.id == id)
            .map(|_| OriginId::from(id))
    }
 }
 #[derive(Debug, thiserror::Error)]
 pub enum ConfigError {
    #[error("Failed to read config: {0}")]
    Read(String),
    #[error("Failed to parse config: {0}")]
    Parse(String),
 }
 #[cfg(test)]
 mod tests {
    use super::*;
    #[test]
    fn test_parse_config() {
        let toml = r#"
 mount_point = "/mnt/music"
 cache_dir = "/home/user/.cache/musicfs"
 [[origins]]
 id = "local"
 origin_type = "local"
 priority = 1
 path = "/mnt/nas/music"
 [[origins]]
 id = "backup"
 origin_type = "s3"
 priority = 2
 bucket = "music-backup"
 region = "us-east-1"
 "#;
        let config: Config = toml::from_str(toml).unwrap();
        assert_eq!(config.origins.len(), 2);
        assert_eq!(config.origins[0].priority, 1);
        assert_eq!(config.origins[1].origin_type, OriginType::S3);
    }
    #[test]
    fn test_default_health_thresholds() {
        let health = HealthConfig::default();
        assert_eq!(health.threshold_for(OriginType::Local), 1);
        assert_eq!(health.threshold_for(OriginType::Sftp), 3);
    }
    #[test]
    fn test_cache_defaults() {
        let cache = CacheConfig::default();
        assert_eq!(cache.metadata_cache_mb, 100);
        assert_eq!(cache.content_cache_gb, 10);
    }
 }
@@ -1,284 +0,0 @@
 use serde::{Deserialize, Serialize};
 use std::collections::HashMap;
 use std::path::PathBuf;
 use thiserror::Error;
 use tracing::{debug, info, trace, warn};
 #[derive(Clone)]
 pub struct CredentialStore {
    cache: HashMap<String, Credential>,
 }
 impl std::fmt::Debug for CredentialStore {
    fn fmt(&self, f: &mut std::fmt::Formatter<'_>) -> std::fmt::Result {
        f.debug_struct("CredentialStore")
            .field("cache_keys", &self.cache.keys().collect::<Vec<_>>())
            .finish()
    }
 }
 #[derive(Clone, Serialize, Deserialize)]
 #[serde(tag = "type")]
 pub enum Credential {
    Basic {
        username: String,
        #[serde(skip_serializing)]
        password: String,
    },
    AwsKey {
        access_key_id: String,
        #[serde(skip_serializing)]
        secret_access_key: String,
        session_token: Option<String>,
        region: String,
    },
    SshKey {
        username: String,
        private_key_path: PathBuf,
        #[serde(skip_serializing)]
        passphrase: Option<String>,
    },
    EnvVar {
        var_name: String,
    },
 }
 impl std::fmt::Debug for Credential {
    fn fmt(&self, f: &mut std::fmt::Formatter<'_>) -> std::fmt::Result {
        match self {
            Self::Basic { username, .. } => f
                .debug_struct("Basic")
                .field("username", username)
                .field("password", &"[REDACTED]")
                .finish(),
            Self::AwsKey {
                access_key_id,
                session_token,
                region,
                ..
            } => {
                let key_preview = if access_key_id.len() > 4 {
                    format!("{}...", &access_key_id[..4])
                } else {
                    "****".to_string()
                };
                let token_display = if session_token.is_some() {
                    "[REDACTED]"
                } else {
                    "None"
                };
                f.debug_struct("AwsKey")
                    .field("access_key_id", &key_preview)
                    .field("secret_access_key", &"[REDACTED]")
                    .field("session_token", &token_display)
                    .field("region", region)
                    .finish()
            }
            Self::SshKey {
                username,
                private_key_path,
                ..
            } => f
                .debug_struct("SshKey")
                .field("username", username)
                .field("private_key_path", private_key_path)
                .field("passphrase", &"[REDACTED]")
                .finish(),
            Self::EnvVar { var_name } => f
                .debug_struct("EnvVar")
                .field("var_name", var_name)
                .finish(),
        }
    }
 }
 impl CredentialStore {
    pub fn new() -> Self {
        Self {
            cache: HashMap::new(),
        }
    }
    pub fn load(
        &mut self,
        origin_id: &str,
        config: &CredentialConfig,
    ) -> Result<Credential, CredentialError> {
        debug!(origin_id = %origin_id, "Loading credentials");
        if let Some(cred) = self.cache.get(origin_id) {
            trace!(origin_id = %origin_id, "Credential cache hit");
            return Ok(cred.clone());
        }
        let cred = match config {
            CredentialConfig::Environment { prefix } => {
                trace!(origin_id = %origin_id, prefix = %prefix, "Loading from environment");
                self.load_from_env(prefix)?
            }
            CredentialConfig::File { path } => {
                trace!(origin_id = %origin_id, path = ?path, "Loading from file");
                self.load_from_file(path)?
            }
            CredentialConfig::Inline(cred) => {
                trace!(origin_id = %origin_id, "Using inline credential");
                cred.clone()
            }
        };
        let cred_type = match &cred {
            Credential::Basic { .. } => "Basic",
            Credential::AwsKey { .. } => "AwsKey",
            Credential::SshKey { .. } => "SshKey",
            Credential::EnvVar { .. } => "EnvVar",
        };
        info!(origin_id = %origin_id, cred_type = %cred_type, "Credential loaded");
        self.cache.insert(origin_id.to_string(), cred.clone());
        Ok(cred)
    }
    fn load_from_env(&self, prefix: &str) -> Result<Credential, CredentialError> {
        if let (Ok(key), Ok(secret)) = (
            std::env::var(format!("{}_ACCESS_KEY_ID", prefix)),
            std::env::var(format!("{}_SECRET_ACCESS_KEY", prefix)),
        ) {
            return Ok(Credential::AwsKey {
                access_key_id: key,
                secret_access_key: secret,
                session_token: std::env::var(format!("{}_SESSION_TOKEN", prefix)).ok(),
                region: std::env::var(format!("{}_REGION", prefix))
                    .unwrap_or_else(|_| "us-east-1".to_string()),
            });
        }
        if let (Ok(user), Ok(pass)) = (
            std::env::var(format!("{}_USERNAME", prefix)),
            std::env::var(format!("{}_PASSWORD", prefix)),
        ) {
            return Ok(Credential::Basic {
                username: user,
                password: pass,
            });
        }
        warn!(prefix = %prefix, "No credentials found in environment");
        Err(CredentialError::NotFound(format!(
            "No credentials found with prefix {}",
            prefix
        )))
    }
    fn load_from_file(&self, path: &PathBuf) -> Result<Credential, CredentialError> {
        let content =
            std::fs::read_to_string(path).map_err(|e| CredentialError::FileRead(e.to_string()))?;
        if path.extension().map(|e| e == "json").unwrap_or(false) {
            serde_json::from_str(&content).map_err(|e| CredentialError::Parse(e.to_string()))
        } else {
            toml::from_str(&content).map_err(|e| CredentialError::Parse(e.to_string()))
        }
    }
    pub fn clear(&mut self) {
        self.cache.clear();
    }
 }
 #[derive(Debug, Clone, Serialize, Deserialize)]
 #[serde(tag = "source")]
 pub enum CredentialConfig {
    Environment { prefix: String },
    File { path: PathBuf },
    Inline(Credential),
 }
 #[derive(Debug, Error)]
 pub enum CredentialError {
    #[error("Credential not found: {0}")]
    NotFound(String),
    #[error("Failed to read credential file: {0}")]
    FileRead(String),
    #[error("Failed to parse credential: {0}")]
    Parse(String),
 }
 impl Default for CredentialStore {
    fn default() -> Self {
        Self::new()
    }
 }
 #[cfg(test)]
 mod tests {
    use super::*;
    #[test]
    fn test_credential_debug_redacted() {
        let cred = Credential::Basic {
            username: "user".to_string(),
            password: "secret123".to_string(),
        };
        let debug_output = format!("{:?}", cred);
        assert!(debug_output.contains("user"));
        assert!(!debug_output.contains("secret123"));
        assert!(debug_output.contains("[REDACTED]"));
    }
    #[test]
    fn test_aws_credential_debug_redacted() {
        let cred = Credential::AwsKey {
            access_key_id: "AKIAIOSFODNN7EXAMPLE".to_string(),
            secret_access_key: "wJalrXUtnFEMI/K7MDENG/bPxRfiCYEXAMPLEKEY".to_string(),
            session_token: None,
            region: "us-east-1".to_string(),
        };
        let debug_output = format!("{:?}", cred);
        assert!(debug_output.contains("AKIA..."));
        assert!(!debug_output.contains("wJalrXUtnFEMI"));
        assert!(debug_output.contains("[REDACTED]"));
    }
    #[test]
    fn test_credential_store_debug() {
        let mut store = CredentialStore::new();
        store.cache.insert(
            "test".to_string(),
            Credential::Basic {
                username: "user".to_string(),
                password: "secret".to_string(),
            },
        );
        let debug_output = format!("{:?}", store);
        assert!(debug_output.contains("test"));
        assert!(!debug_output.contains("secret"));
    }
    #[test]
    fn test_load_from_env() {
        std::env::set_var("TEST_ORIGIN_USERNAME", "testuser");
        std::env::set_var("TEST_ORIGIN_PASSWORD", "testpass");
        let store = CredentialStore::new();
        let cred = store.load_from_env("TEST_ORIGIN").unwrap();
        match cred {
            Credential::Basic { username, password } => {
                assert_eq!(username, "testuser");
                assert_eq!(password, "testpass");
            }
            _ => panic!("Expected Basic credential"),
        }
        std::env::remove_var("TEST_ORIGIN_USERNAME");
        std::env::remove_var("TEST_ORIGIN_PASSWORD");
    }
 }
@@ -1,70 +0,0 @@
 use thiserror::Error;
 #[derive(Error, Debug)]
 pub enum Error {
    #[error("I/O error: {0}")]
    Io(#[from] std::io::Error),
    #[error("Origin not found: {0}")]
    OriginNotFound(String),
    #[error("File not found: {0}")]
    FileNotFound(String),
    #[error("Path resolution failed: {0}")]
    PathResolution(String),
    #[error("Cache error: {0}")]
    Cache(String),
    #[error("Metadata extraction error: {0}")]
    Metadata(String),
    #[error("Database error: {0}")]
    Database(String),
    #[error("Database corrupted: {0}")]
    DatabaseCorrupted(String),
    #[error("NFS stale file handle")]
    NfsStaleHandle,
    #[error("Operation not permitted (read-only filesystem)")]
    ReadOnly,
    #[error("No origin available to serve request")]
    NoOriginAvailable,
    #[error("Maximum retries exceeded")]
    MaxRetriesExceeded,
    #[error("Origin error: {0}")]
    Origin(String),
    #[error("S3 error: {0}")]
    S3(String),
    #[error("SFTP error: {0}")]
    Sftp(String),
    #[error("Operation timed out: {0}")]
    Timeout(String),
    #[error("Credential error: {0}")]
    Credential(String),
 }
 pub type Result<T> = std::result::Result<T, Error>;
 impl Error {
    pub fn is_not_found(&self) -> bool {
        matches!(self, Error::FileNotFound(_))
    }
    pub fn downcast_io(&self) -> Option<&std::io::Error> {
        match self {
            Error::Io(e) => Some(e),
            _ => None,
        }
    }
 }
@@ -1,113 +0,0 @@
 use crate::types::{FileId, OriginId, VirtualPath};
 use tokio::sync::broadcast;
 use tracing::{debug, trace};
 pub struct EventBus {
    sender: broadcast::Sender<Event>,
 }
 impl EventBus {
    pub fn new(capacity: usize) -> Self {
        let (sender, _) = broadcast::channel(capacity);
        Self { sender }
    }
    pub fn publish(&self, event: Event) {
        trace!(event = ?event, "Publishing event");
        let receiver_count = self.sender.receiver_count();
        if self.sender.send(event).is_err() && receiver_count > 0 {
            debug!(
                receiver_count = receiver_count,
                "Event dropped, no active receivers"
            );
        }
    }
    pub fn subscribe(&self) -> broadcast::Receiver<Event> {
        self.sender.subscribe()
    }
 }
 impl Default for EventBus {
    fn default() -> Self {
        Self::new(1024)
    }
 }
 #[derive(Clone, Debug)]
 pub enum Event {
    FileAdded {
        path: VirtualPath,
        origin_id: OriginId,
    },
    FileRemoved {
        path: VirtualPath,
        file_id: Option<FileId>,
    },
    FileModified {
        path: VirtualPath,
    },
    FileAccessed {
        file_id: FileId,
        path: VirtualPath,
        origin_id: OriginId,
        offset: u64,
        size: u32,
    },
    OriginConnected {
        origin_id: OriginId,
    },
    OriginDisconnected {
        origin_id: OriginId,
    },
    SyncStarted {
        origin_id: OriginId,
    },
    SyncCompleted {
        origin_id: OriginId,
        files_changed: u64,
    },
    CacheEviction {
        bytes_freed: u64,
    },
    AllOriginsUnhealthy {
        candidate_count: usize,
    },
    OriginHealthChanged {
        origin_id: OriginId,
        healthy: bool,
    },
 }
 #[cfg(test)]
 mod tests {
    use super::*;
    #[tokio::test]
    async fn test_event_bus() {
        let bus = EventBus::new(16);
        let mut rx = bus.subscribe();
        bus.publish(Event::SyncStarted {
            origin_id: OriginId::from("test"),
        });
        let event = rx.recv().await.unwrap();
        assert!(matches!(event, Event::SyncStarted { .. }));
    }
    #[tokio::test]
    async fn test_event_bus_multiple_subscribers() {
        let bus = EventBus::new(16);
        let mut rx1 = bus.subscribe();
        let mut rx2 = bus.subscribe();
        bus.publish(Event::CacheEviction { bytes_freed: 1024 });
        let e1 = rx1.recv().await.unwrap();
        let e2 = rx2.recv().await.unwrap();
        assert!(matches!(e1, Event::CacheEviction { bytes_freed: 1024 }));
        assert!(matches!(e2, Event::CacheEviction { bytes_freed: 1024 }));
    }
 }
@@ -1,60 +0,0 @@
 pub mod config;
 pub mod credentials;
 pub mod error;
 pub mod events;
 pub mod metrics;
 pub mod resolver;
 pub mod supervisor;
 pub mod types;
 pub use config::{
    CacheConfig, Config, ConfigError, HealthConfig, LoggingConfig, OriginConfig, OriginType,
 };
 use std::path::Path;
 pub fn sanitize_path(path: &Path) -> String {
    if let Ok(home) = std::env::var("HOME") {
        path.to_string_lossy().replace(&home, "~")
    } else {
        path.to_string_lossy().to_string()
    }
 }
 /// Install a custom panic hook that logs panics via tracing before the default behavior.
 /// This ensures panics are captured in log files and journald.
 pub fn install_panic_hook() {
    let default_hook = std::panic::take_hook();
    std::panic::set_hook(Box::new(move |info| {
        let thread = std::thread::current();
        let thread_name = thread.name().unwrap_or("<unnamed>");
        let message = if let Some(s) = info.payload().downcast_ref::<&str>() {
            (*s).to_string()
        } else if let Some(s) = info.payload().downcast_ref::<String>() {
            s.clone()
        } else {
            "unknown panic".to_string()
        };
        let location = info
            .location()
            .map(|l| format!("{}:{}:{}", l.file(), l.line(), l.column()))
            .unwrap_or_else(|| "unknown location".to_string());
        tracing::error!(
            thread = thread_name,
            location = %location,
            "PANIC: {}",
            message
        );
        default_hook(info);
    }));
 }
 pub use credentials::{Credential, CredentialConfig, CredentialError, CredentialStore};
 pub use error::{Error, Result};
 pub use events::{Event, EventBus};
 pub use metrics::{CacheMetrics, FuseOpsMetrics, Metrics, OriginsMetrics};
 pub use resolver::{PathResolver, PathTemplate};
 pub use types::*;
@@ -1,322 +0,0 @@
 use parking_lot::RwLock;
 use std::collections::HashMap;
 use std::sync::atomic::{AtomicU64, Ordering};
 use std::time::Instant;
 #[derive(Default)]
 pub struct Metrics {
    pub fuse_ops: FuseOpsMetrics,
    pub fuse_latency: FuseLatencyMetrics,
    pub cache: CacheMetrics,
    pub origins: OriginsMetrics,
    pub origin_health: OriginHealthMetrics,
    start_time: Option<Instant>,
 }
 impl Metrics {
    pub fn new() -> Self {
        Self {
            start_time: Some(Instant::now()),
            ..Default::default()
        }
    }
    pub fn uptime_secs(&self) -> u64 {
        self.start_time.map(|t| t.elapsed().as_secs()).unwrap_or(0)
    }
    pub fn to_prometheus(&self) -> String {
        let mut output = String::new();
        output.push_str(&format!(
            "# HELP musicfs_fuse_ops_total Total FUSE operations\n\
             # TYPE musicfs_fuse_ops_total counter\n\
             musicfs_fuse_ops_total{{op=\"lookup\"}} {}\n\
             musicfs_fuse_ops_total{{op=\"getattr\"}} {}\n\
             musicfs_fuse_ops_total{{op=\"read\"}} {}\n\
             musicfs_fuse_ops_total{{op=\"readdir\"}} {}\n\
             musicfs_fuse_ops_total{{op=\"open\"}} {}\n",
            self.fuse_ops.lookup.load(Ordering::Relaxed),
            self.fuse_ops.getattr.load(Ordering::Relaxed),
            self.fuse_ops.read.load(Ordering::Relaxed),
            self.fuse_ops.readdir.load(Ordering::Relaxed),
            self.fuse_ops.open.load(Ordering::Relaxed),
        ));
        for (op, histogram) in self.fuse_latency.histograms.read().iter() {
            let quantiles = histogram.quantiles();
            output.push_str(&format!(
                "# HELP musicfs_fuse_latency_seconds FUSE operation latency\n\
                 # TYPE musicfs_fuse_latency_seconds summary\n\
                 musicfs_fuse_latency_seconds{{op=\"{}\",quantile=\"0.5\"}} {:.6}\n\
                 musicfs_fuse_latency_seconds{{op=\"{}\",quantile=\"0.95\"}} {:.6}\n\
                 musicfs_fuse_latency_seconds{{op=\"{}\",quantile=\"0.99\"}} {:.6}\n\
                 musicfs_fuse_latency_seconds_sum{{op=\"{}\"}} {:.6}\n\
                 musicfs_fuse_latency_seconds_count{{op=\"{}\"}} {}\n",
                op,
                quantiles.p50,
                op,
                quantiles.p95,
                op,
                quantiles.p99,
                op,
                histogram.sum_secs(),
                op,
                histogram.count(),
            ));
        }
        output.push_str(&format!(
            "# HELP musicfs_cache_hits_total Cache hits\n\
             # TYPE musicfs_cache_hits_total counter\n\
             musicfs_cache_hits_total {}\n",
            self.cache.hits.load(Ordering::Relaxed),
        ));
        output.push_str(&format!(
            "# HELP musicfs_cache_misses_total Cache misses\n\
             # TYPE musicfs_cache_misses_total counter\n\
             musicfs_cache_misses_total {}\n",
            self.cache.misses.load(Ordering::Relaxed),
        ));
        output.push_str(&format!(
            "# HELP musicfs_cache_size_bytes Current cache size in bytes\n\
             # TYPE musicfs_cache_size_bytes gauge\n\
             musicfs_cache_size_bytes {}\n",
            self.cache.size_bytes.load(Ordering::Relaxed),
        ));
        output.push_str(&format!(
            "# HELP musicfs_cache_chunks_total Number of cached chunks\n\
             # TYPE musicfs_cache_chunks_total gauge\n\
             musicfs_cache_chunks_total {}\n",
            self.cache.chunk_count.load(Ordering::Relaxed),
        ));
        output.push_str(
            "# HELP musicfs_origin_health Origin health status (1=healthy, 0=unhealthy)\n\
             # TYPE musicfs_origin_health gauge\n",
        );
        for (origin_id, healthy) in self.origin_health.status.read().iter() {
            output.push_str(&format!(
                "musicfs_origin_health{{origin=\"{}\"}} {}\n",
                origin_id,
                if *healthy { 1 } else { 0 }
            ));
        }
        output.push_str(&format!(
            "# HELP musicfs_uptime_seconds Daemon uptime in seconds\n\
             # TYPE musicfs_uptime_seconds gauge\n\
             musicfs_uptime_seconds {}\n",
            self.uptime_secs(),
        ));
        output
    }
    pub fn hit_ratio(&self) -> f64 {
        let hits = self.cache.hits.load(Ordering::Relaxed) as f64;
        let misses = self.cache.misses.load(Ordering::Relaxed) as f64;
        let total = hits + misses;
        if total == 0.0 {
            0.0
        } else {
            hits / total
        }
    }
 }
 #[derive(Default)]
 pub struct FuseOpsMetrics {
    pub lookup: AtomicU64,
    pub getattr: AtomicU64,
    pub read: AtomicU64,
    pub readdir: AtomicU64,
    pub open: AtomicU64,
 }
 impl FuseOpsMetrics {
    pub fn record_lookup(&self) {
        self.lookup.fetch_add(1, Ordering::Relaxed);
    }
    pub fn record_getattr(&self) {
        self.getattr.fetch_add(1, Ordering::Relaxed);
    }
    pub fn record_read(&self) {
        self.read.fetch_add(1, Ordering::Relaxed);
    }
    pub fn record_readdir(&self) {
        self.readdir.fetch_add(1, Ordering::Relaxed);
    }
    pub fn record_open(&self) {
        self.open.fetch_add(1, Ordering::Relaxed);
    }
 }
 #[derive(Default)]
 pub struct CacheMetrics {
    pub hits: AtomicU64,
    pub misses: AtomicU64,
    pub size_bytes: AtomicU64,
    pub chunk_count: AtomicU64,
 }
 impl CacheMetrics {
    pub fn record_hit(&self) {
        self.hits.fetch_add(1, Ordering::Relaxed);
    }
    pub fn record_miss(&self) {
        self.misses.fetch_add(1, Ordering::Relaxed);
    }
    pub fn update_size(&self, size: u64) {
        self.size_bytes.store(size, Ordering::Relaxed);
    }
    pub fn update_chunk_count(&self, count: u64) {
        self.chunk_count.store(count, Ordering::Relaxed);
    }
 }
 #[derive(Default)]
 pub struct OriginsMetrics {
    pub healthy_count: AtomicU64,
    pub total_count: AtomicU64,
 }
 impl OriginsMetrics {
    pub fn update(&self, healthy: u64, total: u64) {
        self.healthy_count.store(healthy, Ordering::Relaxed);
        self.total_count.store(total, Ordering::Relaxed);
    }
 }
 #[derive(Default)]
 pub struct FuseLatencyMetrics {
    pub histograms: RwLock<HashMap<String, LatencyHistogram>>,
 }
 impl FuseLatencyMetrics {
    pub fn record(&self, op: &str, latency_secs: f64) {
        let mut histograms = self.histograms.write();
        histograms
            .entry(op.to_string())
            .or_default()
            .record(latency_secs);
    }
 }
 #[derive(Default)]
 pub struct LatencyHistogram {
    samples: Vec<f64>,
    sum: f64,
 }
 impl LatencyHistogram {
    pub fn record(&mut self, latency_secs: f64) {
        self.samples.push(latency_secs);
        self.sum += latency_secs;
        if self.samples.len() > 10000 {
            self.samples.drain(..5000);
        }
    }
    pub fn quantiles(&self) -> Quantiles {
        if self.samples.is_empty() {
            return Quantiles::default();
        }
        let mut sorted = self.samples.clone();
        sorted.sort_by(|a, b| a.partial_cmp(b).unwrap_or(std::cmp::Ordering::Equal));
        let len = sorted.len();
        Quantiles {
            p50: sorted[len / 2],
            p95: sorted[(len as f64 * 0.95) as usize],
            p99: sorted[(len as f64 * 0.99) as usize],
        }
    }
    pub fn sum_secs(&self) -> f64 {
        self.sum
    }
    pub fn count(&self) -> u64 {
        self.samples.len() as u64
    }
 }
 #[derive(Default)]
 pub struct Quantiles {
    pub p50: f64,
    pub p95: f64,
    pub p99: f64,
 }
 #[derive(Default)]
 pub struct OriginHealthMetrics {
    pub status: RwLock<HashMap<String, bool>>,
 }
 impl OriginHealthMetrics {
    pub fn set_health(&self, origin_id: &str, healthy: bool) {
        self.status.write().insert(origin_id.to_string(), healthy);
    }
 }
 #[cfg(test)]
 mod tests {
    use super::*;
    #[test]
    fn test_metrics_new() {
        let metrics = Metrics::new();
        assert!(metrics.uptime_secs() < 5);
    }
    #[test]
    fn test_fuse_ops_recording() {
        let metrics = Metrics::new();
        metrics.fuse_ops.record_lookup();
        metrics.fuse_ops.record_lookup();
        metrics.fuse_ops.record_read();
        assert_eq!(metrics.fuse_ops.lookup.load(Ordering::Relaxed), 2);
        assert_eq!(metrics.fuse_ops.read.load(Ordering::Relaxed), 1);
    }
    #[test]
    fn test_cache_hit_ratio() {
        let metrics = Metrics::new();
        metrics.cache.hits.store(8, Ordering::Relaxed);
        metrics.cache.misses.store(2, Ordering::Relaxed);
        assert!((metrics.hit_ratio() - 0.8).abs() < 0.001);
    }
    #[test]
    fn test_cache_hit_ratio_zero() {
        let metrics = Metrics::new();
        assert_eq!(metrics.hit_ratio(), 0.0);
    }
    #[test]
    fn test_prometheus_format() {
        let metrics = Metrics::new();
        metrics.fuse_ops.record_lookup();
        metrics.cache.record_hit();
        let output = metrics.to_prometheus();
        assert!(output.contains("musicfs_fuse_ops_total"));
        assert!(output.contains("musicfs_cache_hits_total"));
    }
 }
@@ -1,174 +0,0 @@
 use crate::{AudioMeta, VirtualPath};
 #[derive(Debug, Clone)]
 pub struct PathTemplate {
    pub pattern: String,
    pub fallback_artist: String,
    pub fallback_album: String,
    pub fallback_title: String,
    pub fallback_year: String,
 }
 impl Default for PathTemplate {
    fn default() -> Self {
        Self {
            pattern: "$artist/$album ($year) [$format_upper]/$track - $title.$format".to_string(),
            fallback_artist: "Unknown Artist".to_string(),
            fallback_album: "Unknown Album".to_string(),
            fallback_title: "Unknown Track".to_string(),
            fallback_year: "Unknown".to_string(),
        }
    }
 }
 pub struct PathResolver {
    template: PathTemplate,
 }
 impl PathResolver {
    pub fn new(template: PathTemplate) -> Self {
        Self { template }
    }
    pub fn resolve(&self, meta: &AudioMeta, extension: &str) -> VirtualPath {
        let artist = meta
            .artist
            .as_deref()
            .unwrap_or(&self.template.fallback_artist);
        let album = meta
            .album
            .as_deref()
            .unwrap_or(&self.template.fallback_album);
        let title = meta
            .title
            .as_deref()
            .unwrap_or(&self.template.fallback_title);
        let year = meta
            .year
            .map(|y| y.to_string())
            .unwrap_or_else(|| self.template.fallback_year.clone());
        let track = meta.track.unwrap_or(0);
        let disc = meta.disc.unwrap_or(1);
        let genre = meta.genre.as_deref().unwrap_or("Unknown");
        let format = extension.to_lowercase();
        let format_upper = extension.to_uppercase();
        let artist = sanitize_path_component(artist);
        let album = sanitize_path_component(album);
        let title = sanitize_path_component(title);
        let genre = sanitize_path_component(genre);
        let path = self
            .template
            .pattern
            .replace("$artist", &artist)
            .replace("$album", &album)
            .replace("$title", &title)
            .replace("$track", &format!("{:02}", track))
            .replace("$disc", &disc.to_string())
            .replace("$year", &year)
            .replace("$genre", &genre)
            .replace("$format_upper", &format_upper)
            .replace("$format", &format);
        VirtualPath::new(path)
    }
 }
 impl Default for PathResolver {
    fn default() -> Self {
        Self::new(PathTemplate::default())
    }
 }
 fn sanitize_path_component(s: &str) -> String {
    s.chars()
        .map(|c| match c {
            '/' | '\\' | ':' | '*' | '?' | '"' | '<' | '>' | '|' | '\0' => '_',
            c => c,
        })
        .collect::<String>()
        .trim()
        .to_string()
 }
 #[cfg(test)]
 mod tests {
    use super::*;
    use crate::AudioFormat;
    #[test]
    fn test_resolve_complete_metadata() {
        let resolver = PathResolver::default();
        let meta = AudioMeta {
            artist: Some("Metallica".to_string()),
            album: Some("Master of Puppets".to_string()),
            title: Some("Battery".to_string()),
            track: Some(1),
            year: Some(1986),
            format: AudioFormat::Flac,
            ..Default::default()
        };
        let path = resolver.resolve(&meta, "flac");
        assert_eq!(
            path.as_str(),
            "Metallica/Master of Puppets (1986) [FLAC]/01 - Battery.flac"
        );
    }
    #[test]
    fn test_resolve_missing_album() {
        let resolver = PathResolver::default();
        let meta = AudioMeta {
            artist: Some("Artist".to_string()),
            title: Some("Track".to_string()),
            track: Some(5),
            ..Default::default()
        };
        let path = resolver.resolve(&meta, "mp3");
        assert_eq!(
            path.as_str(),
            "Artist/Unknown Album (Unknown) [MP3]/05 - Track.mp3"
        );
    }
    #[test]
    fn test_sanitize_special_chars() {
        let resolver = PathResolver::default();
        let meta = AudioMeta {
            artist: Some("AC/DC".to_string()),
            album: Some("Who Made Who?".to_string()),
            title: Some("Test:Track".to_string()),
            track: Some(1),
            year: Some(1986),
            ..Default::default()
        };
        let path = resolver.resolve(&meta, "flac");
        assert!(!path.as_str().contains(':'));
        assert!(!path.as_str().contains('?'));
        assert!(path.as_str().contains("AC_DC"));
    }
    #[test]
    fn test_custom_template() {
        let template = PathTemplate {
            pattern: "$genre/$artist - $album/$track $title.$format".to_string(),
            ..Default::default()
        };
        let resolver = PathResolver::new(template);
        let meta = AudioMeta {
            artist: Some("Artist".to_string()),
            album: Some("Album".to_string()),
            title: Some("Song".to_string()),
            genre: Some("Rock".to_string()),
            track: Some(3),
            ..Default::default()
        };
        let path = resolver.resolve(&meta, "flac");
        assert_eq!(path.as_str(), "Rock/Artist - Album/03 Song.flac");
    }
 }
@@ -1,181 +0,0 @@
 use parking_lot::RwLock;
 use std::collections::HashMap;
 use std::sync::Arc;
 use std::time::{Duration, Instant};
 use tokio::task::JoinHandle;
 use tracing::{error, warn};
 pub struct TaskSupervisor {
    tasks: Arc<RwLock<HashMap<String, TaskEntry>>>,
 }
 struct TaskEntry {
    handle: JoinHandle<()>,
    status: TaskStatus,
    restart_count: u32,
    last_restart: Option<Instant>,
 }
 #[derive(Debug, Clone)]
 pub enum TaskStatus {
    Running,
    Failed { error: String, at: Instant },
    Restarting { attempt: u32 },
    Stopped,
 }
 impl Default for TaskSupervisor {
    fn default() -> Self {
        Self::new()
    }
 }
 impl TaskSupervisor {
    pub fn new() -> Self {
        Self {
            tasks: Arc::new(RwLock::new(HashMap::new())),
        }
    }
    pub fn spawn_supervised<F>(&self, name: &str, future: F)
    where
        F: std::future::Future<Output = ()> + Send + 'static,
    {
        let name_owned = name.to_string();
        let handle = tokio::spawn(async move {
            future.await;
        });
        self.tasks.write().insert(
            name_owned,
            TaskEntry {
                handle,
                status: TaskStatus::Running,
                restart_count: 0,
                last_restart: None,
            },
        );
    }
    pub fn spawn_critical<F, Fut>(&self, name: &str, factory: F)
    where
        F: Fn() -> Fut + Send + Sync + 'static,
        Fut: std::future::Future<Output = ()> + Send + 'static,
    {
        let tasks = self.tasks.clone();
        let name_owned = name.to_string();
        let monitor_handle = tokio::spawn(async move {
            let mut restart_count = 0u32;
            let max_restarts = 5u32;
            let backoff_durations = [
                Duration::from_secs(1),
                Duration::from_secs(5),
                Duration::from_secs(30),
            ];
            loop {
                let handle = tokio::spawn(factory());
                {
                    let mut t = tasks.write();
                    if let Some(entry) = t.get_mut(&name_owned) {
                        entry.status = TaskStatus::Running;
                    }
                }
                match handle.await {
                    Ok(()) => {
                        let mut t = tasks.write();
                        if let Some(entry) = t.get_mut(&name_owned) {
                            entry.status = TaskStatus::Stopped;
                        }
                        break;
                    }
                    Err(e) => {
                        restart_count += 1;
                        if restart_count > max_restarts {
                            error!(task = %name_owned, "Task exceeded max restarts ({}), giving up", max_restarts);
                            let mut t = tasks.write();
                            if let Some(entry) = t.get_mut(&name_owned) {
                                entry.status = TaskStatus::Failed {
                                    error: format!("Exceeded max restarts: {}", e),
                                    at: Instant::now(),
                                };
                            }
                            break;
                        }
                        let backoff_idx =
                            (restart_count as usize - 1).min(backoff_durations.len() - 1);
                        let backoff = backoff_durations[backoff_idx];
                        warn!(
                            task = %name_owned,
                            error = %e,
                            attempt = restart_count,
                            backoff_ms = backoff.as_millis() as u64,
                            "Critical task failed, restarting with backoff"
                        );
                        {
                            let mut t = tasks.write();
                            if let Some(entry) = t.get_mut(&name_owned) {
                                entry.status = TaskStatus::Restarting {
                                    attempt: restart_count,
                                };
                                entry.restart_count = restart_count;
                                entry.last_restart = Some(Instant::now());
                            }
                        }
                        tokio::time::sleep(backoff).await;
                    }
                }
            }
        });
        self.tasks.write().insert(
            name.to_string(),
            TaskEntry {
                handle: monitor_handle,
                status: TaskStatus::Running,
                restart_count: 0,
                last_restart: None,
            },
        );
    }
    pub fn task_status(&self, name: &str) -> TaskStatus {
        let mut tasks = self.tasks.write();
        if let Some(entry) = tasks.get_mut(name) {
            if entry.handle.is_finished() {
                entry.status = TaskStatus::Failed {
                    error: "Task exited".into(),
                    at: Instant::now(),
                };
            }
            entry.status.clone()
        } else {
            TaskStatus::Stopped
        }
    }
    pub fn check_all(&self) -> Vec<(String, TaskStatus)> {
        let mut tasks = self.tasks.write();
        tasks
            .iter_mut()
            .map(|(name, entry)| {
                if entry.handle.is_finished() {
                    entry.status = TaskStatus::Failed {
                        error: "Task exited".into(),
                        at: Instant::now(),
                    };
                }
                (name.clone(), entry.status.clone())
            })
            .collect()
    }
 }
@@ -1,223 +0,0 @@
 use serde::{Deserialize, Serialize};
 use std::path::PathBuf;
 use std::time::SystemTime;
 #[derive(Debug, Clone, PartialEq, Eq, Hash, Serialize, Deserialize)]
 pub struct OriginId(pub String);
 impl From<&str> for OriginId {
    fn from(s: &str) -> Self {
        Self(s.to_string())
    }
 }
 impl std::fmt::Display for OriginId {
    fn fmt(&self, f: &mut std::fmt::Formatter<'_>) -> std::fmt::Result {
        write!(f, "{}", self.0)
    }
 }
 #[derive(Debug, Clone, Copy, PartialEq, Eq, Hash, Serialize, Deserialize)]
 pub struct FileId(pub i64);
 #[derive(Debug, Clone, PartialEq, Eq, Hash, Serialize, Deserialize)]
 pub struct VirtualPath(pub PathBuf);
 impl VirtualPath {
    pub fn new(path: impl Into<PathBuf>) -> Self {
        Self(path.into())
    }
    pub fn as_path(&self) -> &std::path::Path {
        &self.0
    }
    pub fn as_str(&self) -> &str {
        self.0.to_str().unwrap_or("")
    }
 }
 #[derive(Debug, Clone, PartialEq, Eq, Serialize, Deserialize)]
 pub struct RealPath {
    pub origin_id: OriginId,
    pub path: PathBuf,
 }
 #[derive(Debug, Clone, Copy, PartialEq, Eq, Hash, Serialize, Deserialize)]
 pub struct ContentHash(pub [u8; 8]);
 impl ContentHash {
    pub fn from_bytes(data: &[u8]) -> Self {
        use xxhash_rust::xxh64::xxh64;
        Self(xxh64(data, 0).to_le_bytes())
    }
    pub fn to_hex(&self) -> String {
        hex::encode(self.0)
    }
 }
 #[derive(Debug, Clone, Copy, PartialEq, Eq, Hash, Serialize, Deserialize)]
 pub struct ChunkHash(pub [u8; 8]);
 impl ChunkHash {
    pub fn from_bytes(data: &[u8]) -> Self {
        use xxhash_rust::xxh64::xxh64;
        Self(xxh64(data, 0).to_le_bytes())
    }
    pub fn as_hex(&self) -> String {
        hex::encode(self.0)
    }
    pub fn to_hex(&self) -> String {
        self.as_hex()
    }
    pub fn from_hex(s: &str) -> Option<Self> {
        let bytes = hex::decode(s).ok()?;
        if bytes.len() != 8 {
            return None;
        }
        let mut arr = [0u8; 8];
        arr.copy_from_slice(&bytes);
        Some(Self(arr))
    }
 }
 impl std::fmt::Display for ChunkHash {
    fn fmt(&self, f: &mut std::fmt::Formatter<'_>) -> std::fmt::Result {
        write!(f, "{}", self.as_hex())
    }
 }
 #[derive(Debug, Clone, Copy, PartialEq, Eq, Serialize, Deserialize, Default)]
 pub enum AudioFormat {
    Flac,
    Mp3,
    Opus,
    Vorbis,
    Aac,
    Alac,
    Wav,
    #[default]
    Unknown,
 }
 impl AudioFormat {
    pub fn from_extension(ext: &str) -> Self {
        match ext.to_lowercase().as_str() {
            "flac" => Self::Flac,
            "mp3" => Self::Mp3,
            "opus" => Self::Opus,
            "ogg" => Self::Vorbis,
            "m4a" | "aac" => Self::Aac,
            "wav" => Self::Wav,
            _ => Self::Unknown,
        }
    }
 }
 #[derive(Debug, Clone, Default, Serialize, Deserialize)]
 pub struct AudioMeta {
    pub title: Option<String>,
    pub artist: Option<String>,
    pub album: Option<String>,
    pub album_artist: Option<String>,
    pub genre: Option<String>,
    pub year: Option<u32>,
    pub track: Option<u32>,
    pub disc: Option<u32>,
    pub duration_ms: Option<u64>,
    pub bitrate: Option<u32>,
    pub sample_rate: Option<u32>,
    pub format: AudioFormat,
    pub track_total: Option<u32>,
    pub disc_total: Option<u32>,
    pub date: Option<String>,
    pub composer: Option<String>,
    pub comment: Option<String>,
    pub lyrics: Option<String>,
    pub copyright: Option<String>,
    pub compilation: Option<bool>,
    pub artist_sort: Option<String>,
    pub album_artist_sort: Option<String>,
    pub album_sort: Option<String>,
    pub title_sort: Option<String>,
    pub mb_recording_id: Option<String>,
    pub mb_album_id: Option<String>,
    pub mb_artist_id: Option<String>,
    pub mb_album_artist_id: Option<String>,
    pub mb_release_group_id: Option<String>,
    pub replaygain_track_gain: Option<f32>,
    pub replaygain_track_peak: Option<f32>,
    pub replaygain_album_gain: Option<f32>,
    pub replaygain_album_peak: Option<f32>,
    pub channels: Option<u32>,
    pub bits_per_sample: Option<u32>,
    pub encoder: Option<String>,
 }
 #[derive(Debug, Clone, Serialize, Deserialize)]
 pub struct FileMeta {
    pub id: FileId,
    pub virtual_path: VirtualPath,
    pub real_path: RealPath,
    pub size: u64,
    pub mtime: SystemTime,
    pub content_hash: Option<ContentHash>,
    pub audio: Option<AudioMeta>,
 }
 #[derive(Debug, Clone)]
 pub struct DirEntry {
    pub name: String,
    pub is_dir: bool,
    pub size: u64,
    pub mtime: SystemTime,
 }
 #[derive(Debug, Clone)]
 pub struct FileStat {
    pub size: u64,
    pub mtime: SystemTime,
    pub is_dir: bool,
 }
 #[derive(Debug, Clone, Copy, PartialEq, Eq, Default)]
 pub enum HealthStatus {
    Healthy,
    Degraded,
    Unhealthy,
    #[default]
    Unknown,
 }
 #[cfg(test)]
 mod tests {
    use super::*;
    #[test]
    fn test_content_hash() {
        let data = b"hello world";
        let hash1 = ContentHash::from_bytes(data);
        let hash2 = ContentHash::from_bytes(data);
        assert_eq!(hash1, hash2);
        let hash3 = ContentHash::from_bytes(b"different");
        assert_ne!(hash1, hash3);
    }
    #[test]
    fn test_audio_format_from_extension() {
        assert_eq!(AudioFormat::from_extension("flac"), AudioFormat::Flac);
        assert_eq!(AudioFormat::from_extension("MP3"), AudioFormat::Mp3);
        assert_eq!(AudioFormat::from_extension("unknown"), AudioFormat::Unknown);
    }
    #[test]
    fn test_virtual_path() {
        let path = VirtualPath::new("/Artist/Album/Track.flac");
        assert_eq!(path.as_str(), "/Artist/Album/Track.flac");
    }
 }
@@ -1,19 +0,0 @@
 [package]
 name = "musicfs-fuse"
 version.workspace = true
 edition.workspace = true
 [dependencies]
 musicfs-core = { path = "../musicfs-core" }
 musicfs-cache = { path = "../musicfs-cache" }
 musicfs-cas = { path = "../musicfs-cas" }
 musicfs-search = { path = "../musicfs-search" }
 fuser.workspace = true
 tokio.workspace = true
 tracing.workspace = true
 moka.workspace = true
 parking_lot.workspace = true
 libc = "0.2"
 [dev-dependencies]
 tempfile.workspace = true
@@ -1,954 +0,0 @@
 use crate::ops::SearchOps;
 use fuser::{
    FileAttr, FileType, Filesystem, ReplyAttr, ReplyData, ReplyDirectory, ReplyEntry, ReplyOpen,
    Request,
 };
 use musicfs_cache::{
    Database, OverlayError, OverlayReader, RemoveError, RenameError, VirtualNode, VirtualTree,
    ROOT_INODE,
 };
 use musicfs_cas::FileReader;
 use musicfs_core::{Result, VirtualPath};
 use parking_lot::RwLock;
 use std::collections::HashMap;
 use std::ffi::OsStr;
 use std::path::Path;
 use std::sync::Arc;
 use std::time::{Duration, SystemTime};
 use tokio::runtime::Handle;
 use tracing::{debug, info, instrument, trace, warn};
 const TTL: Duration = Duration::from_secs(1);
 const BLOCK_SIZE: u32 = 512;
 const SEARCH_QUERY_INODE_BASE: u64 = 0xFFFF_FFFF_0000_0100;
 pub struct MusicFs {
    tree: Arc<RwLock<VirtualTree>>,
    reader: Option<Arc<FileReader>>,
    db: Option<Arc<Database>>,
    overlay_reader: Option<Arc<OverlayReader>>,
    runtime_handle: Handle,
    search_ops: Option<SearchOps>,
    query_inodes: RwLock<HashMap<String, u64>>,
    inode_queries: RwLock<HashMap<u64, String>>,
    next_query_inode: RwLock<u64>,
    uid: u32,
    gid: u32,
 }
 impl MusicFs {
    pub fn new(tree: Arc<RwLock<VirtualTree>>, runtime_handle: Handle) -> Self {
        Self {
            tree,
            reader: None,
            db: None,
            overlay_reader: None,
            runtime_handle,
            search_ops: None,
            query_inodes: RwLock::new(HashMap::new()),
            inode_queries: RwLock::new(HashMap::new()),
            next_query_inode: RwLock::new(SEARCH_QUERY_INODE_BASE),
            uid: unsafe { libc::getuid() },
            gid: unsafe { libc::getgid() },
        }
    }
    pub fn with_reader(
        tree: Arc<RwLock<VirtualTree>>,
        reader: Arc<FileReader>,
        runtime_handle: Handle,
    ) -> Self {
        Self {
            tree,
            reader: Some(reader),
            db: None,
            overlay_reader: None,
            runtime_handle,
            search_ops: None,
            query_inodes: RwLock::new(HashMap::new()),
            inode_queries: RwLock::new(HashMap::new()),
            next_query_inode: RwLock::new(SEARCH_QUERY_INODE_BASE),
            uid: unsafe { libc::getuid() },
            gid: unsafe { libc::getgid() },
        }
    }
    pub fn with_db(mut self, db: Arc<Database>) -> Self {
        self.db = Some(db);
        self
    }
    pub fn with_overlay(mut self, overlay: Arc<OverlayReader>) -> Self {
        self.overlay_reader = Some(overlay);
        self
    }
    pub fn with_search(mut self, search_ops: SearchOps) -> Self {
        self.search_ops = Some(search_ops);
        self
    }
    fn resolve_path(&self, parent_inode: u64, name: &OsStr) -> Option<VirtualPath> {
        let tree = self.tree.read();
        let parent_path = self.inode_to_path_inner(&tree, parent_inode)?;
        let name_str = name.to_string_lossy();
        let full_path = if parent_path == "/" {
            format!("/{}", name_str)
        } else {
            format!("{}/{}", parent_path, name_str)
        };
        Some(VirtualPath::new(full_path))
    }
    fn inode_to_path_inner(&self, tree: &VirtualTree, inode: u64) -> Option<String> {
        for (path, &ino) in tree.path_to_inode_iter() {
            if ino == inode {
                return Some(path.as_str().to_string());
            }
        }
        None
    }
    fn get_or_create_query_inode(&self, query: &str) -> u64 {
        let query_inodes = self.query_inodes.read();
        if let Some(&inode) = query_inodes.get(query) {
            return inode;
        }
        drop(query_inodes);
        let mut query_inodes = self.query_inodes.write();
        let mut inode_queries = self.inode_queries.write();
        let mut next_inode = self.next_query_inode.write();
        if let Some(&inode) = query_inodes.get(query) {
            return inode;
        }
        let inode = *next_inode;
        *next_inode += 1;
        query_inodes.insert(query.to_string(), inode);
        inode_queries.insert(inode, query.to_string());
        inode
    }
    fn get_query_for_inode(&self, inode: u64) -> Option<String> {
        self.inode_queries.read().get(&inode).cloned()
    }
    pub fn mount(self, mountpoint: &Path) -> Result<()> {
        info!("Mounting MusicFS at {:?}", mountpoint);
        let options = vec![
            fuser::MountOption::FSName("musicfs".to_string()),
            fuser::MountOption::AutoUnmount,
            fuser::MountOption::AllowOther,
        ];
        fuser::mount2(self, mountpoint, &options).map_err(musicfs_core::Error::Io)?;
        Ok(())
    }
    pub fn spawn_mount(self, mountpoint: &Path) -> Result<fuser::BackgroundSession> {
        info!("Mounting MusicFS at {:?}", mountpoint);
        let options = vec![
            fuser::MountOption::FSName("musicfs".to_string()),
            fuser::MountOption::AutoUnmount,
            fuser::MountOption::AllowOther,
        ];
        let session =
            fuser::spawn_mount2(self, mountpoint, &options).map_err(musicfs_core::Error::Io)?;
        Ok(session)
    }
    fn node_to_attr(&self, node: &VirtualNode) -> FileAttr {
        match node {
            VirtualNode::Directory(dir) => FileAttr {
                ino: dir.inode,
                size: 0,
                blocks: 0,
                atime: dir.mtime,
                mtime: dir.mtime,
                ctime: dir.mtime,
                crtime: dir.mtime,
                kind: FileType::Directory,
                perm: 0o755,
                nlink: 2,
                uid: self.uid,
                gid: self.gid,
                rdev: 0,
                blksize: BLOCK_SIZE,
                flags: 0,
            },
            VirtualNode::File(file) => FileAttr {
                ino: file.inode,
                size: file.size,
                blocks: (file.size + BLOCK_SIZE as u64 - 1) / BLOCK_SIZE as u64,
                atime: file.mtime,
                mtime: file.mtime,
                ctime: file.mtime,
                crtime: file.mtime,
                kind: FileType::RegularFile,
                perm: 0o644,
                nlink: 1,
                uid: self.uid,
                gid: self.gid,
                rdev: 0,
                blksize: BLOCK_SIZE,
                flags: 0,
            },
        }
    }
 }
 impl Filesystem for MusicFs {
    fn init(
        &mut self,
        _req: &Request<'_>,
        _config: &mut fuser::KernelConfig,
    ) -> std::result::Result<(), libc::c_int> {
        info!("MusicFS initialized");
        Ok(())
    }
    fn destroy(&mut self) {
        info!("MusicFS destroyed");
    }
    #[instrument(level = "debug", skip(self, reply))]
    fn lookup(&mut self, _req: &Request, parent: u64, name: &OsStr, reply: ReplyEntry) {
        let name_str = name.to_string_lossy();
        if parent == ROOT_INODE && SearchOps::is_search_dir_name(&name_str) {
            trace!(parent, name = %name_str, "search_dir_name matched");
            if let Some(ref search_ops) = self.search_ops {
                search_ops.lookup_search_dir(reply);
                return;
            }
        }
        if parent == SearchOps::search_dir_inode() {
            trace!(parent, name = %name_str, "search_dir_inode matched");
            if let Some(ref search_ops) = self.search_ops {
                let inode = self.get_or_create_query_inode(&name_str);
                search_ops.lookup_query_dir(&name_str, inode, reply);
                return;
            }
        }
        if let Some(query) = self.get_query_for_inode(parent) {
            trace!(parent, name = %name_str, query = %query, "query_inode matched");
            if let Some(ref search_ops) = self.search_ops {
                let inode = self.get_or_create_query_inode(&format!("{}:{}", query, name_str));
                search_ops.lookup_result(inode, reply);
                return;
            }
        }
        let tree = self.tree.read();
        if let Some(inode) = tree.lookup(parent, name) {
            trace!(parent, name = %name_str, ino = inode, "file found in tree");
            if let Some(node) = tree.get(inode) {
                let attr = self.node_to_attr(node);
                reply.entry(&TTL, &attr, 0);
                return;
            }
        }
        trace!(parent, name = %name_str, "file not found");
        reply.error(libc::ENOENT);
    }
    #[instrument(level = "debug", skip(self, reply))]
    fn getattr(&mut self, _req: &Request, ino: u64, reply: ReplyAttr) {
        if ino == SearchOps::search_dir_inode() {
            trace!(ino, "search_dir_inode matched");
            if let Some(ref search_ops) = self.search_ops {
                search_ops.getattr_search_dir(reply);
                return;
            }
        }
        if SearchOps::is_search_inode(ino) {
            trace!(ino, "search_inode matched");
            if let Some(ref search_ops) = self.search_ops {
                search_ops.getattr_result(ino, reply);
                return;
            }
        }
        if self.get_query_for_inode(ino).is_some() {
            trace!(ino, "query_inode matched");
            if let Some(ref search_ops) = self.search_ops {
                search_ops.getattr_search_dir(reply);
                return;
            }
        }
        let tree = self.tree.read();
        if let Some(node) = tree.get(ino) {
            trace!(ino, "inode found in tree");
            let mut attr = self.node_to_attr(node);
            if let VirtualNode::File(file) = node {
                if let Some(ref overlay) = self.overlay_reader {
                    match overlay.estimate_virtual_size(file.file_id) {
                        Ok(Some(virtual_size)) => {
                            trace!(ino, file_id = ?file.file_id, virtual_size, "using overlay virtual size");
                            attr.size = virtual_size;
                            attr.blocks =
                                (virtual_size + BLOCK_SIZE as u64 - 1) / BLOCK_SIZE as u64;
                        }
                        Ok(None) => {
                            trace!(ino, file_id = ?file.file_id, "no overlay, using original size");
                        }
                        Err(e) => {
                            warn!(ino, file_id = ?file.file_id, error = %e, "overlay size estimation failed, using original");
                        }
                    }
                }
            }
            reply.attr(&TTL, &attr);
        } else {
            trace!(ino, "inode not found");
            reply.error(libc::ENOENT);
        }
    }
    #[instrument(level = "debug", skip(self, reply))]
    fn readdir(
        &mut self,
        _req: &Request,
        ino: u64,
        _fh: u64,
        offset: i64,
        mut reply: ReplyDirectory,
    ) {
        if ino == SearchOps::search_dir_inode() {
            trace!(ino, offset, "search_dir_inode matched");
            if let Some(ref search_ops) = self.search_ops {
                search_ops.readdir_search_root(offset, reply);
                return;
            }
        }
        if let Some(query) = self.get_query_for_inode(ino) {
            trace!(ino, offset, query = %query, "query_inode matched");
            if let Some(ref search_ops) = self.search_ops {
                search_ops.readdir_query(&query, offset, reply);
                return;
            }
        }
        let tree = self.tree.read();
        if let Some(children) = tree.readdir(ino) {
            trace!(
                ino,
                offset,
                children_count = children.len(),
                "directory found"
            );
            let parent_ino = tree.get_parent(ino).unwrap_or(ROOT_INODE);
            let entries: Vec<(u64, FileType, &str)> = vec![
                (ino, FileType::Directory, "."),
                (parent_ino, FileType::Directory, ".."),
            ];
            let child_entries: Vec<(u64, FileType, String)> = children
                .iter()
                .map(|(name, child_ino, is_dir)| {
                    let kind = if *is_dir {
                        FileType::Directory
                    } else {
                        FileType::RegularFile
                    };
                    (*child_ino, kind, name.to_string_lossy().to_string())
                })
                .collect();
            for (i, (inode, kind, name)) in entries.iter().enumerate().skip(offset as usize) {
                if reply.add(*inode, (i + 1) as i64, *kind, name) {
                    reply.ok();
                    return;
                }
            }
            let base_offset = entries.len();
            for (i, (inode, kind, name)) in child_entries.iter().enumerate() {
                let entry_offset = base_offset + i;
                if entry_offset < offset as usize {
                    continue;
                }
                if reply.add(*inode, (entry_offset + 1) as i64, *kind, name) {
                    break;
                }
            }
            reply.ok();
        } else {
            trace!(ino, offset, "directory not found");
            reply.error(libc::ENOENT);
        }
    }
    #[instrument(level = "debug", skip(self, reply))]
    fn open(&mut self, _req: &Request, ino: u64, flags: i32, reply: ReplyOpen) {
        let write_flags = libc::O_WRONLY | libc::O_RDWR | libc::O_APPEND | libc::O_TRUNC;
        if flags & write_flags != 0 {
            trace!(ino, flags, "write flags detected");
            reply.error(libc::EROFS);
            return;
        }
        let tree = self.tree.read();
        if tree.get(ino).is_some() {
            trace!(ino, "inode found");
            reply.opened(0, 0);
        } else {
            trace!(ino, "inode not found");
            reply.error(libc::ENOENT);
        }
    }
    #[instrument(level = "debug", skip(self, reply))]
    fn read(
        &mut self,
        _req: &Request,
        ino: u64,
        _fh: u64,
        offset: i64,
        size: u32,
        _flags: i32,
        _lock_owner: Option<u64>,
        reply: ReplyData,
    ) {
        let file_id = {
            let tree = self.tree.read();
            if let Some(VirtualNode::File(file)) = tree.get(ino) {
                trace!(ino, "file found in tree");
                file.file_id
            } else {
                trace!(ino, "file not found");
                reply.error(libc::ENOENT);
                return;
            }
        };
        let handle = self.runtime_handle.clone();
        if let Some(ref overlay) = self.overlay_reader {
            let overlay = overlay.clone();
            let result = std::thread::scope(|_| {
                handle.block_on(async {
                    tokio::time::timeout(
                        Duration::from_secs(30),
                        overlay.read(file_id, offset as u64, size),
                    )
                    .await
                })
            });
            match result {
                Ok(Ok(data)) => {
                    trace!(
                        ino,
                        offset,
                        size_bytes = size,
                        bytes_read = data.len(),
                        "overlay read successful"
                    );
                    reply.data(&data);
                }
                Ok(Err(e)) => {
                    let errno = match &e {
                        OverlayError::NotFound(_) => libc::ENOENT,
                        OverlayError::Database(_) => libc::EIO,
                        OverlayError::Handler(_) => libc::EIO,
                        OverlayError::Cas(_) => libc::EIO,
                        OverlayError::NoHandler(_) => libc::EIO,
                    };
                    warn!(ino, offset, size_bytes = size, error = %e, "overlay read failed");
                    reply.error(errno);
                }
                Err(_timeout) => {
                    warn!(
                        ino,
                        offset,
                        size_bytes = size,
                        "overlay read timed out after 30s"
                    );
                    reply.error(libc::EIO);
                }
            }
        } else {
            let Some(reader) = &self.reader else {
                trace!(ino, "no reader available");
                reply.data(&[]);
                return;
            };
            let reader = reader.clone();
            let result = std::thread::scope(|_| {
                handle.block_on(async {
                    tokio::time::timeout(
                        Duration::from_secs(30),
                        reader.read(file_id, offset as u64, size),
                    )
                    .await
                })
            });
            match result {
                Ok(Ok(data)) => {
                    trace!(
                        ino,
                        offset,
                        size_bytes = size,
                        bytes_read = data.len(),
                        "read successful"
                    );
                    reply.data(&data);
                }
                Ok(Err(e)) => {
                    warn!(ino, offset, size_bytes = size, error = %e, "read failed");
                    reply.error(libc::EIO);
                }
                Err(_timeout) => {
                    warn!(ino, offset, size_bytes = size, "read timed out after 30s");
                    reply.error(libc::EIO);
                }
            }
        }
    }
    #[instrument(level = "debug", skip(self, reply))]
    fn release(
        &mut self,
        _req: &Request,
        ino: u64,
        _fh: u64,
        _flags: i32,
        _lock_owner: Option<u64>,
        _flush: bool,
        reply: fuser::ReplyEmpty,
    ) {
        trace!(ino, "releasing file handle");
        reply.ok();
    }
    fn readlink(&mut self, _req: &Request, ino: u64, reply: ReplyData) {
        debug!("readlink(ino={})", ino);
        if SearchOps::is_search_inode(ino) {
            if let Some(ref search_ops) = self.search_ops {
                search_ops.readlink(ino, reply);
                return;
            }
        }
        reply.error(libc::EINVAL);
    }
    fn write(
        &mut self,
        _req: &Request,
        _ino: u64,
        _fh: u64,
        _offset: i64,
        _data: &[u8],
        _write_flags: u32,
        _flags: i32,
        _lock_owner: Option<u64>,
        reply: fuser::ReplyWrite,
    ) {
        reply.error(libc::EROFS);
    }
    fn mkdir(
        &mut self,
        _req: &Request,
        parent: u64,
        name: &OsStr,
        _mode: u32,
        _umask: u32,
        reply: ReplyEntry,
    ) {
        let path = match self.resolve_path(parent, name) {
            Some(p) => p,
            None => {
                reply.error(libc::ENOENT);
                return;
            }
        };
        let mut tree = self.tree.write();
        match tree.mkdir(&path) {
            Ok(inode) => {
                if let Some(ref db) = self.db {
                    if let Err(e) = db.insert_directory(&path) {
                        warn!(error = %e, "failed to persist directory to database");
                    }
                }
                let attr = FileAttr {
                    ino: inode,
                    size: 0,
                    blocks: 0,
                    atime: SystemTime::now(),
                    mtime: SystemTime::now(),
                    ctime: SystemTime::now(),
                    crtime: SystemTime::now(),
                    kind: FileType::Directory,
                    perm: 0o755,
                    nlink: 2,
                    uid: self.uid,
                    gid: self.gid,
                    rdev: 0,
                    blksize: BLOCK_SIZE,
                    flags: 0,
                };
                debug!(path = %path.as_str(), inode, "mkdir successful");
                reply.entry(&TTL, &attr, 0);
            }
            Err(RenameError::TargetExists) => reply.error(libc::EEXIST),
            Err(RenameError::ParentNotFound) => reply.error(libc::ENOENT),
            Err(_) => reply.error(libc::EIO),
        }
    }
    fn unlink(&mut self, _req: &Request, parent: u64, name: &OsStr, reply: fuser::ReplyEmpty) {
        let path = match self.resolve_path(parent, name) {
            Some(p) => p,
            None => {
                reply.error(libc::ENOENT);
                return;
            }
        };
        let (file_id, is_dir) = {
            let tree = self.tree.read();
            match tree.get_by_path(&path) {
                Some(VirtualNode::File(f)) => (Some(f.file_id), false),
                Some(VirtualNode::Directory(_)) => (None, true),
                None => {
                    reply.error(libc::ENOENT);
                    return;
                }
            }
        };
        if is_dir {
            reply.error(libc::EISDIR);
            return;
        }
        let trash_path = VirtualPath::new(format!("/.trash{}", path.as_str()));
        {
            let mut tree = self.tree.write();
            tree.ensure_trash_dir();
            let trash_parent = std::path::Path::new(trash_path.as_str())
                .parent()
                .map(|p| VirtualPath::new(p.to_string_lossy().into_owned()))
                .unwrap_or_else(|| VirtualPath::new("/.trash"));
            if let Err(e) = tree.mkdir_p(&trash_parent) {
                if !matches!(e, RenameError::TargetExists) {
                    warn!(error = ?e, "failed to create trash parent directories");
                    reply.error(libc::EIO);
                    return;
                }
            }
            if let Err(e) = tree.rename_file(&path, &trash_path) {
                match e {
                    RenameError::SourceNotFound => reply.error(libc::ENOENT),
                    RenameError::TargetExists => reply.error(libc::EEXIST),
                    _ => reply.error(libc::EIO),
                }
                return;
            }
        }
        if let (Some(ref db), Some(id)) = (&self.db, file_id) {
            if let Err(e) = db.update_virtual_path(id, &trash_path) {
                warn!(error = %e, "failed to update virtual path in database");
            }
            if let Err(e) = db.mark_trashed(id, &path) {
                warn!(error = %e, "failed to mark file as trashed in database");
            }
        }
        debug!(path = %path.as_str(), trash = %trash_path.as_str(), "file moved to trash");
        reply.ok();
    }
    fn rmdir(&mut self, _req: &Request, parent: u64, name: &OsStr, reply: fuser::ReplyEmpty) {
        let path = match self.resolve_path(parent, name) {
            Some(p) => p,
            None => {
                reply.error(libc::ENOENT);
                return;
            }
        };
        if VirtualTree::is_trash_path(&path) {
            reply.error(libc::EPERM);
            return;
        }
        {
            let mut tree = self.tree.write();
            match tree.remove_directory(&path) {
                Ok(()) => {}
                Err(RemoveError::NotFound) => {
                    reply.error(libc::ENOENT);
                    return;
                }
                Err(RemoveError::NotEmpty) => {
                    reply.error(libc::ENOTEMPTY);
                    return;
                }
                Err(RemoveError::NotDirectory) => {
                    reply.error(libc::ENOTDIR);
                    return;
                }
            }
        }
        if let Some(ref db) = self.db {
            if let Err(e) = db.delete_directory(&path) {
                warn!(error = %e, "failed to delete directory from database");
            }
        }
        debug!(path = %path.as_str(), "directory removed");
        reply.ok();
    }
    fn rename(
        &mut self,
        _req: &Request,
        parent: u64,
        name: &OsStr,
        newparent: u64,
        newname: &OsStr,
        _flags: u32,
        reply: fuser::ReplyEmpty,
    ) {
        let old_path = match self.resolve_path(parent, name) {
            Some(p) => p,
            None => {
                reply.error(libc::ENOENT);
                return;
            }
        };
        let new_path = match self.resolve_path(newparent, newname) {
            Some(p) => p,
            None => {
                reply.error(libc::ENOENT);
                return;
            }
        };
        if old_path.as_str() == new_path.as_str() {
            reply.ok();
            return;
        }
        let is_dir = {
            let tree = self.tree.read();
            tree.get_by_path(&old_path)
                .map(|n| n.is_dir())
                .unwrap_or(false)
        };
        let result = if is_dir {
            let mut tree = self.tree.write();
            match tree.rename_directory(&old_path, &new_path) {
                Ok(count) => {
                    if let Some(ref db) = self.db {
                        let old_prefix = if old_path.as_str().ends_with('/') {
                            old_path.as_str().to_string()
                        } else {
                            format!("{}/", old_path.as_str())
                        };
                        let new_prefix = if new_path.as_str().ends_with('/') {
                            new_path.as_str().to_string()
                        } else {
                            format!("{}/", new_path.as_str())
                        };
                        if let Err(e) = db.rename_directory(&old_prefix, &new_prefix) {
                            warn!(error = %e, "failed to persist file path rename to database");
                        }
                        if let Err(e) = db.rename_directories(&old_prefix, &new_prefix) {
                            warn!(error = %e, "failed to persist directory rename to database");
                        }
                    }
                    debug!(old = %old_path.as_str(), new = %new_path.as_str(), count, "directory renamed");
                    Ok(())
                }
                Err(e) => Err(e),
            }
        } else {
            let file_id = {
                let tree = self.tree.read();
                match tree.get_by_path(&old_path) {
                    Some(VirtualNode::File(f)) => Some(f.file_id),
                    _ => None,
                }
            };
            let mut tree = self.tree.write();
            match tree.rename_file(&old_path, &new_path) {
                Ok(()) => {
                    if let (Some(ref db), Some(id)) = (&self.db, file_id) {
                        if let Err(e) = db.update_virtual_path(id, &new_path) {
                            warn!(error = %e, "failed to persist file rename to database");
                        }
                        let was_in_trash = VirtualTree::is_trash_path(&old_path);
                        let now_in_trash = VirtualTree::is_trash_path(&new_path);
                        if was_in_trash && !now_in_trash {
                            if let Err(e) = db.unmark_trashed(id) {
                                warn!(error = %e, "failed to unmark trashed after restore");
                            }
                            debug!(path = %new_path.as_str(), "file restored from trash");
                        }
                    }
                    debug!(old = %old_path.as_str(), new = %new_path.as_str(), "file renamed");
                    Ok(())
                }
                Err(e) => Err(e),
            }
        };
        match result {
            Ok(()) => reply.ok(),
            Err(RenameError::SourceNotFound) => reply.error(libc::ENOENT),
            Err(RenameError::TargetExists) => reply.error(libc::EEXIST),
            Err(RenameError::ParentNotFound) => reply.error(libc::ENOENT),
            Err(RenameError::IsDirectory) => reply.error(libc::EISDIR),
            Err(RenameError::NotDirectory) => reply.error(libc::ENOTDIR),
        }
    }
    fn create(
        &mut self,
        _req: &Request,
        _parent: u64,
        _name: &OsStr,
        _mode: u32,
        _umask: u32,
        _flags: i32,
        reply: fuser::ReplyCreate,
    ) {
        reply.error(libc::EROFS);
    }
    fn setattr(
        &mut self,
        _req: &Request,
        _ino: u64,
        _mode: Option<u32>,
        _uid: Option<u32>,
        _gid: Option<u32>,
        _size: Option<u64>,
        _atime: Option<fuser::TimeOrNow>,
        _mtime: Option<fuser::TimeOrNow>,
        _ctime: Option<SystemTime>,
        _fh: Option<u64>,
        _crtime: Option<SystemTime>,
        _chgtime: Option<SystemTime>,
        _bkuptime: Option<SystemTime>,
        _flags: Option<u32>,
        reply: ReplyAttr,
    ) {
        reply.error(libc::EROFS);
    }
    fn symlink(
        &mut self,
        _req: &Request,
        _parent: u64,
        _name: &OsStr,
        _link: &Path,
        reply: ReplyEntry,
    ) {
        reply.error(libc::EROFS);
    }
    fn link(
        &mut self,
        _req: &Request,
        _ino: u64,
        _newparent: u64,
        _newname: &OsStr,
        reply: ReplyEntry,
    ) {
        reply.error(libc::EROFS);
    }
    fn mknod(
        &mut self,
        _req: &Request,
        _parent: u64,
        _name: &OsStr,
        _mode: u32,
        _umask: u32,
        _rdev: u32,
        reply: ReplyEntry,
    ) {
        reply.error(libc::EROFS);
    }
 }
 #[cfg(test)]
 mod tests {
    use super::*;
    use musicfs_cache::TreeBuilder;
    use musicfs_core::{FileId, FileMeta, OriginId, RealPath, VirtualPath};
    use std::path::PathBuf;
    fn make_file_meta(id: i64, vpath: &str, size: u64) -> FileMeta {
        FileMeta {
            id: FileId(id),
            virtual_path: VirtualPath::new(vpath),
            real_path: RealPath {
                origin_id: OriginId::from("test"),
                path: PathBuf::from("/test"),
            },
            size,
            mtime: SystemTime::now(),
            content_hash: None,
            audio: None,
        }
    }
    #[test]
    fn test_tree_integration() {
        let runtime = tokio::runtime::Runtime::new().unwrap();
        let handle = runtime.handle().clone();
        let mut builder = TreeBuilder::new();
        builder.add_file(&make_file_meta(1, "/Artist/Album/Track.flac", 30_000_000));
        let tree = Arc::new(RwLock::new(builder.build()));
        let _fs = MusicFs::new(tree.clone(), handle);
        let tree_read = tree.read();
        assert!(tree_read.get(ROOT_INODE).is_some());
        assert!(tree_read
            .get_by_path(&VirtualPath::new("/Artist"))
            .is_some());
    }
 }
@@ -1,5 +0,0 @@
 mod filesystem;
 pub mod ops;
 pub use filesystem::MusicFs;
 pub use ops::SearchOps;
@@ -1,5 +0,0 @@
 mod prefetch;
 mod search;
 pub use prefetch::PrefetchOps;
 pub use search::SearchOps;
@@ -1,298 +0,0 @@
 use fuser::{FileAttr, FileType, ReplyAttr, ReplyData, ReplyDirectory, ReplyEntry};
 use musicfs_cache::{PatternStore, PrefetchConfig, PrefetchEngine};
 use musicfs_cas::ContentFetcher;
 use musicfs_core::{EventBus, FileId};
 use std::sync::Arc;
 use std::time::{Duration, SystemTime};
 const PREFETCH_DIR_INODE: u64 = 0xFFFF_FFFF_0000_0002;
 const PREFETCH_STATUS_INODE: u64 = 0xFFFF_FFFF_0000_0003;
 const PREFETCH_HINTS_BASE: u64 = 0xFFFF_FFFF_2000_0000;
 pub struct PrefetchOps {
    pattern_store: Arc<PatternStore>,
    engine: Option<Arc<PrefetchEngine>>,
    uid: u32,
    gid: u32,
 }
 impl PrefetchOps {
    pub fn new(pattern_store: Arc<PatternStore>, uid: u32, gid: u32) -> Self {
        Self {
            pattern_store,
            engine: None,
            uid,
            gid,
        }
    }
    pub fn with_engine(
        pattern_store: Arc<PatternStore>,
        fetcher: Arc<ContentFetcher>,
        config: PrefetchConfig,
        uid: u32,
        gid: u32,
    ) -> Self {
        let engine = Arc::new(PrefetchEngine::new(config, pattern_store.clone(), fetcher));
        Self {
            pattern_store,
            engine: Some(engine),
            uid,
            gid,
        }
    }
    pub fn start_engine(&self, event_bus: Arc<EventBus>) -> Option<musicfs_cache::PrefetchHandle> {
        self.engine
            .as_ref()
            .map(|e| e.clone().start(event_bus, self.pattern_store.clone()))
    }
    pub fn is_prefetch_dir_name(name: &str) -> bool {
        name == ".prefetch"
    }
    pub fn is_prefetch_inode(inode: u64) -> bool {
        inode == PREFETCH_DIR_INODE
            || inode == PREFETCH_STATUS_INODE
            || inode >= PREFETCH_HINTS_BASE
    }
    pub fn prefetch_dir_inode() -> u64 {
        PREFETCH_DIR_INODE
    }
    pub fn lookup_prefetch_dir(&self, reply: ReplyEntry) {
        let attr = self.dir_attr(PREFETCH_DIR_INODE);
        reply.entry(&Duration::from_secs(60), &attr, 0);
    }
    pub fn lookup_status(&self, reply: ReplyEntry) {
        let status = self.generate_status();
        let attr = self.file_attr(PREFETCH_STATUS_INODE, status.len() as u64);
        reply.entry(&Duration::from_secs(1), &attr, 0);
    }
    pub fn lookup_hint(&self, name: &str, reply: ReplyEntry) {
        if let Some(inode) = self.hint_name_to_inode(name) {
            let attr = self.file_attr(inode, 256);
            reply.entry(&Duration::from_secs(1), &attr, 0);
        } else {
            reply.error(libc::ENOENT);
        }
    }
    pub fn getattr_prefetch_dir(&self, reply: ReplyAttr) {
        let attr = self.dir_attr(PREFETCH_DIR_INODE);
        reply.attr(&Duration::from_secs(60), &attr);
    }
    pub fn getattr_status(&self, reply: ReplyAttr) {
        let status = self.generate_status();
        let attr = self.file_attr(PREFETCH_STATUS_INODE, status.len() as u64);
        reply.attr(&Duration::from_secs(1), &attr);
    }
    pub fn getattr_hint(&self, inode: u64, reply: ReplyAttr) {
        let attr = self.file_attr(inode, 256);
        reply.attr(&Duration::from_secs(1), &attr);
    }
    pub fn readdir_prefetch_root(&self, offset: i64, mut reply: ReplyDirectory) {
        let entries: Vec<(u64, FileType, &str)> = vec![
            (PREFETCH_DIR_INODE, FileType::Directory, "."),
            (1, FileType::Directory, ".."),
            (PREFETCH_STATUS_INODE, FileType::RegularFile, "status"),
        ];
        let recently_played = self.pattern_store.recently_played(7).unwrap_or_default();
        let predictions: Vec<(u64, FileType, String)> = recently_played
            .iter()
            .take(10)
            .enumerate()
            .map(|(i, file_id)| {
                let inode = PREFETCH_HINTS_BASE + i as u64;
                let name = format!("hint_{:04}", file_id.0);
                (inode, FileType::RegularFile, name)
            })
            .collect();
        for (i, (inode, kind, name)) in entries.iter().enumerate().skip(offset as usize) {
            if reply.add(*inode, (i + 1) as i64, *kind, *name) {
                reply.ok();
                return;
            }
        }
        let base_offset = entries.len();
        for (i, (inode, kind, name)) in predictions.iter().enumerate() {
            let entry_offset = base_offset + i;
            if entry_offset < offset as usize {
                continue;
            }
            if reply.add(*inode, (entry_offset + 1) as i64, *kind, name) {
                break;
            }
        }
        reply.ok();
    }
    pub fn read_status(&self, offset: i64, size: u32, reply: ReplyData) {
        let status = self.generate_status();
        let start = offset as usize;
        let end = std::cmp::min(start + size as usize, status.len());
        if start >= status.len() {
            reply.data(&[]);
        } else {
            reply.data(&status.as_bytes()[start..end]);
        }
    }
    pub fn read_hint(&self, inode: u64, offset: i64, size: u32, reply: ReplyData) {
        let file_id = self.inode_to_file_id(inode);
        let predictions = self.pattern_store.predict_next(file_id, 5);
        let content = predictions
            .iter()
            .map(|id| format!("{}", id.0))
            .collect::<Vec<_>>()
            .join("\n");
        let start = offset as usize;
        let end = std::cmp::min(start + size as usize, content.len());
        if start >= content.len() {
            reply.data(&[]);
        } else {
            reply.data(&content.as_bytes()[start..end]);
        }
    }
    fn generate_status(&self) -> String {
        let engine_status = if let Some(engine) = &self.engine {
            format!(
                "running: {}\nin_flight: {}",
                engine.is_running(),
                engine.in_flight_count()
            )
        } else {
            "engine: disabled".to_string()
        };
        let most_played = self
            .pattern_store
            .most_played(5)
            .unwrap_or_default()
            .iter()
            .map(|id| format!("{}", id.0))
            .collect::<Vec<_>>()
            .join(", ");
        format!(
            "MusicFS Prefetch Status\n\
             =======================\n\
             {}\n\
             most_played: [{}]\n",
            engine_status, most_played
        )
    }
    fn hint_name_to_inode(&self, name: &str) -> Option<u64> {
        if name.starts_with("hint_") {
            let id_str = name.strip_prefix("hint_")?;
            let id: i64 = id_str.parse().ok()?;
            Some(PREFETCH_HINTS_BASE + id as u64)
        } else {
            None
        }
    }
    fn inode_to_file_id(&self, inode: u64) -> FileId {
        FileId((inode - PREFETCH_HINTS_BASE) as i64)
    }
    fn dir_attr(&self, inode: u64) -> FileAttr {
        FileAttr {
            ino: inode,
            size: 0,
            blocks: 0,
            atime: SystemTime::UNIX_EPOCH,
            mtime: SystemTime::UNIX_EPOCH,
            ctime: SystemTime::UNIX_EPOCH,
            crtime: SystemTime::UNIX_EPOCH,
            kind: FileType::Directory,
            perm: 0o555,
            nlink: 2,
            uid: self.uid,
            gid: self.gid,
            rdev: 0,
            blksize: 512,
            flags: 0,
        }
    }
    fn file_attr(&self, inode: u64, size: u64) -> FileAttr {
        FileAttr {
            ino: inode,
            size,
            blocks: (size + 511) / 512,
            atime: SystemTime::UNIX_EPOCH,
            mtime: SystemTime::UNIX_EPOCH,
            ctime: SystemTime::UNIX_EPOCH,
            crtime: SystemTime::UNIX_EPOCH,
            kind: FileType::RegularFile,
            perm: 0o444,
            nlink: 1,
            uid: self.uid,
            gid: self.gid,
            rdev: 0,
            blksize: 512,
            flags: 0,
        }
    }
 }
 #[cfg(test)]
 mod tests {
    use super::*;
    use tempfile::TempDir;
    #[test]
    fn test_prefetch_ops_new() {
        let dir = TempDir::new().unwrap();
        let pattern_store =
            Arc::new(PatternStore::new(&dir.path().join("patterns.db"), 30).unwrap());
        let _ops = PrefetchOps::new(pattern_store, 1000, 1000);
    }
    #[test]
    fn test_is_prefetch_inode() {
        assert!(PrefetchOps::is_prefetch_inode(PREFETCH_DIR_INODE));
        assert!(PrefetchOps::is_prefetch_inode(PREFETCH_STATUS_INODE));
        assert!(PrefetchOps::is_prefetch_inode(PREFETCH_HINTS_BASE));
        assert!(PrefetchOps::is_prefetch_inode(PREFETCH_HINTS_BASE + 100));
        assert!(!PrefetchOps::is_prefetch_inode(1));
        assert!(!PrefetchOps::is_prefetch_inode(1000));
    }
    #[test]
    fn test_hint_name_to_inode() {
        let dir = TempDir::new().unwrap();
        let pattern_store =
            Arc::new(PatternStore::new(&dir.path().join("patterns.db"), 30).unwrap());
        let ops = PrefetchOps::new(pattern_store, 1000, 1000);
        assert_eq!(
            ops.hint_name_to_inode("hint_0001"),
            Some(PREFETCH_HINTS_BASE + 1)
        );
        assert_eq!(
            ops.hint_name_to_inode("hint_9999"),
            Some(PREFETCH_HINTS_BASE + 9999)
        );
        assert_eq!(ops.hint_name_to_inode("invalid"), None);
    }
 }
@@ -1,273 +0,0 @@
 use fuser::{FileAttr, FileType, ReplyAttr, ReplyData, ReplyDirectory, ReplyEntry};
 use moka::sync::Cache;
 use musicfs_search::{SearchHit, SearchIndex};
 use std::path::Path;
 use std::sync::Arc;
 use std::time::{Duration, SystemTime};
 const SEARCH_DIR_INODE: u64 = 0xFFFF_FFFF_0000_0001;
 const SEARCH_RESULT_BASE: u64 = 0xFFFF_FFFF_1000_0000;
 const RESULT_CACHE_MAX_ENTRIES: u64 = 1000;
 const RESULT_CACHE_TTL_SECS: u64 = 300;
 const INODE_CACHE_MAX_ENTRIES: u64 = 10000;
 const MAX_QUERY_LENGTH: usize = 256;
 pub struct SearchOps {
    index: Arc<SearchIndex>,
    result_cache: Cache<String, Vec<SearchHit>>,
    inode_to_result: Cache<u64, (String, usize)>,
    mount_point: String,
    uid: u32,
    gid: u32,
 }
 impl SearchOps {
    pub fn new(index: Arc<SearchIndex>, mount_point: &str, uid: u32, gid: u32) -> Self {
        let result_cache = Cache::builder()
            .max_capacity(RESULT_CACHE_MAX_ENTRIES)
            .time_to_live(Duration::from_secs(RESULT_CACHE_TTL_SECS))
            .build();
        let inode_to_result = Cache::builder()
            .max_capacity(INODE_CACHE_MAX_ENTRIES)
            .time_to_live(Duration::from_secs(RESULT_CACHE_TTL_SECS))
            .build();
        Self {
            index,
            result_cache,
            inode_to_result,
            mount_point: mount_point.to_string(),
            uid,
            gid,
        }
    }
    pub fn is_search_dir_name(name: &str) -> bool {
        name == ".search"
    }
    pub fn is_search_inode(inode: u64) -> bool {
        inode == SEARCH_DIR_INODE || inode >= SEARCH_RESULT_BASE
    }
    pub fn search_dir_inode() -> u64 {
        SEARCH_DIR_INODE
    }
    pub fn lookup_search_dir(&self, reply: ReplyEntry) {
        let attr = self.dir_attr(SEARCH_DIR_INODE);
        reply.entry(&Duration::from_secs(60), &attr, 0);
    }
    pub fn lookup_query_dir(&self, query: &str, inode: u64, reply: ReplyEntry) {
        let results = self.execute_query(query);
        if results.is_empty() {
            reply.error(libc::ENOENT);
            return;
        }
        let attr = self.dir_attr(inode);
        reply.entry(&Duration::from_secs(1), &attr, 0);
    }
    pub fn lookup_result(&self, inode: u64, reply: ReplyEntry) {
        if self.inode_to_result.contains_key(&inode) {
            let attr = self.symlink_attr(inode, 256);
            reply.entry(&Duration::from_secs(1), &attr, 0);
        } else {
            reply.error(libc::ENOENT);
        }
    }
    pub fn getattr_search_dir(&self, reply: ReplyAttr) {
        let attr = self.dir_attr(SEARCH_DIR_INODE);
        reply.attr(&Duration::from_secs(60), &attr);
    }
    pub fn getattr_result(&self, inode: u64, reply: ReplyAttr) {
        let attr = self.symlink_attr(inode, 256);
        reply.attr(&Duration::from_secs(1), &attr);
    }
    pub fn readdir_search_root(&self, offset: i64, mut reply: ReplyDirectory) {
        let entries = vec![
            (SEARCH_DIR_INODE, FileType::Directory, "."),
            (1, FileType::Directory, ".."),
        ];
        for (i, (inode, kind, name)) in entries.iter().enumerate().skip(offset as usize) {
            if reply.add(*inode, (i + 1) as i64, *kind, name) {
                break;
            }
        }
        reply.ok();
    }
    pub fn readdir_query(&self, query: &str, offset: i64, mut reply: ReplyDirectory) {
        let results = self.execute_query(query);
        let entries = vec![
            (SEARCH_DIR_INODE + 1, FileType::Directory, ".".to_string()),
            (SEARCH_DIR_INODE, FileType::Directory, "..".to_string()),
        ];
        for (i, (inode, kind, name)) in entries.iter().enumerate().skip(offset as usize) {
            if reply.add(*inode, (i + 1) as i64, *kind, name) {
                reply.ok();
                return;
            }
        }
        let base_offset = entries.len();
        for (i, hit) in results.iter().enumerate() {
            let entry_offset = base_offset + i;
            if entry_offset < offset as usize {
                continue;
            }
            let inode = SEARCH_RESULT_BASE + i as u64;
            let name = self.result_filename(hit, i);
            self.inode_to_result.insert(inode, (query.to_string(), i));
            if reply.add(inode, (entry_offset + 1) as i64, FileType::Symlink, &name) {
                break;
            }
        }
        reply.ok();
    }
    pub fn readlink(&self, inode: u64, reply: ReplyData) {
        let (query, index) = match self.inode_to_result.get(&inode) {
            Some((q, i)) => (q, i),
            None => {
                reply.error(libc::ENOENT);
                return;
            }
        };
        let results = self.execute_query(&query);
        if let Some(hit) = results.get(index) {
            if let Some(target) = self.safe_symlink_target(hit.virtual_path.as_str()) {
                reply.data(target.as_bytes());
            } else {
                reply.error(libc::EINVAL);
            }
        } else {
            reply.error(libc::ENOENT);
        }
    }
    fn safe_symlink_target(&self, virtual_path: &str) -> Option<String> {
        let normalized = Path::new(virtual_path).components().fold(
            std::path::PathBuf::new(),
            |mut acc, comp| {
                match comp {
                    std::path::Component::Normal(s) => acc.push(s),
                    std::path::Component::RootDir => acc.push("/"),
                    _ => {}
                }
                acc
            },
        );
        let path_str = normalized.to_string_lossy();
        if path_str.contains("..") {
            return None;
        }
        Some(format!("{}{}", self.mount_point, path_str))
    }
    fn execute_query(&self, query: &str) -> Vec<SearchHit> {
        let query = if query.len() > MAX_QUERY_LENGTH {
            &query[..MAX_QUERY_LENGTH]
        } else {
            query
        };
        if let Some(results) = self.result_cache.get(query) {
            return results;
        }
        let results = self.index.search(query, 1000).unwrap_or_default();
        self.result_cache.insert(query.to_string(), results.clone());
        results
    }
    fn result_filename(&self, hit: &SearchHit, index: usize) -> String {
        let artist = hit.artist.as_deref().unwrap_or("Unknown");
        let title = hit.title.as_deref().unwrap_or("Unknown");
        let ext = hit
            .virtual_path
            .as_str()
            .rsplit('.')
            .next()
            .unwrap_or("flac");
        format!("{:03}. {} - {}.{}", index + 1, artist, title, ext)
    }
    fn dir_attr(&self, inode: u64) -> FileAttr {
        FileAttr {
            ino: inode,
            size: 0,
            blocks: 0,
            atime: SystemTime::UNIX_EPOCH,
            mtime: SystemTime::UNIX_EPOCH,
            ctime: SystemTime::UNIX_EPOCH,
            crtime: SystemTime::UNIX_EPOCH,
            kind: FileType::Directory,
            perm: 0o555,
            nlink: 2,
            uid: self.uid,
            gid: self.gid,
            rdev: 0,
            blksize: 512,
            flags: 0,
        }
    }
    fn symlink_attr(&self, inode: u64, target_len: u64) -> FileAttr {
        FileAttr {
            ino: inode,
            size: target_len,
            blocks: 0,
            atime: SystemTime::UNIX_EPOCH,
            mtime: SystemTime::UNIX_EPOCH,
            ctime: SystemTime::UNIX_EPOCH,
            crtime: SystemTime::UNIX_EPOCH,
            kind: FileType::Symlink,
            perm: 0o777,
            nlink: 1,
            uid: self.uid,
            gid: self.gid,
            rdev: 0,
            blksize: 512,
            flags: 0,
        }
    }
 }
 #[cfg(test)]
 mod tests {
    use super::*;
    use musicfs_search::SearchIndex;
    use tempfile::TempDir;
    #[test]
    fn test_search_ops_new() {
        let dir = TempDir::new().unwrap();
        let index = Arc::new(SearchIndex::open(dir.path()).unwrap());
        let _ops = SearchOps::new(index, "/mnt/music", 1000, 1000);
    }
    #[test]
    fn test_is_search_inode() {
        assert!(SearchOps::is_search_inode(SEARCH_DIR_INODE));
        assert!(SearchOps::is_search_inode(SEARCH_RESULT_BASE));
        assert!(SearchOps::is_search_inode(SEARCH_RESULT_BASE + 100));
        assert!(!SearchOps::is_search_inode(1));
        assert!(!SearchOps::is_search_inode(1000));
    }
 }
@@ -1,32 +0,0 @@
 [package]
 name = "musicfs-grpc"
 version.workspace = true
 edition.workspace = true
 [dependencies]
 musicfs-cache = { path = "../musicfs-cache" }
 musicfs-cas = { path = "../musicfs-cas" }
 musicfs-metadata = { path = "../musicfs-metadata" }
 musicfs-search = { path = "../musicfs-search" }
 musicfs-core = { path = "../musicfs-core" }
 parking_lot.workspace = true
 tonic.workspace = true
 prost.workspace = true
 tokio.workspace = true
 tokio-stream.workspace = true
 tracing.workspace = true
 thiserror.workspace = true
 serde.workspace = true
 serde_json.workspace = true
 chrono.workspace = true
 csv = "1.3"
 reqwest = { version = "0.11", features = ["json"] }
 hmac = "0.12"
 sha2 = "0.10"
 hex.workspace = true
 [build-dependencies]
 tonic-build.workspace = true
 [dev-dependencies]
 tempfile.workspace = true
@@ -1,4 +0,0 @@
 fn main() -> Result<(), Box<dyn std::error::Error>> {
    tonic_build::compile_protos("proto/musicfs.proto")?;
    Ok(())
 }
@@ -1,322 +0,0 @@
 syntax = "proto3";
 package musicfs.v1;
 option go_package = "homelab.lan/music-agregator/gen/musicfs/v1;musicfsv1";
 service MusicFS {
  rpc Search(SearchRequest) returns (SearchResponse);
  rpc SearchStream(SearchRequest) returns (stream SearchResult);
  rpc GetStatus(Empty) returns (StatusResponse);
  rpc Shutdown(ShutdownRequest) returns (Empty);
  rpc GetCacheStats(Empty) returns (CacheStats);
  rpc ClearCache(ClearCacheRequest) returns (ClearCacheResponse);
  rpc Prefetch(PrefetchRequest) returns (stream PrefetchProgress);
  rpc ListOrigins(Empty) returns (OriginsResponse);
  rpc GetOriginHealth(OriginRequest) returns (OriginHealthResponse);
  rpc RescanOrigin(OriginRequest) returns (stream SyncProgress);
  rpc SubscribeEvents(EventFilter) returns (stream Event);
 }
 service MetadataService {
  rpc GetMetadata(GetMetadataRequest) returns (MetadataResponse);
  rpc UpdateMetadata(UpdateMetadataRequest) returns (UpdateMetadataResponse);
  rpc ClearOverlay(ClearOverlayRequest) returns (ClearOverlayResponse);
  rpc BatchUpdateMetadata(BatchUpdateRequest) returns (stream BatchUpdateProgress);
  rpc ImportMetadata(ImportMetadataRequest) returns (stream ImportProgress);
 }
 message Empty {}
 message SearchRequest {
  string query = 1;
  optional uint32 limit = 2;
  optional uint32 offset = 3;
  optional string origin_id = 4;
 }
 message SearchResponse {
  repeated SearchResult results = 1;
  uint64 total_matches = 2;
  uint32 query_time_ms = 3;
 }
 message SearchResult {
  int64 file_id = 1;
  string virtual_path = 2;
  optional string artist = 3;
  optional string album = 4;
  optional string title = 5;
  float score = 6;
  map<string, string> highlights = 7;
 }
 enum MountState {
  MOUNT_UNKNOWN = 0;
  MOUNT_MOUNTING = 1;
  MOUNT_READY = 2;
  MOUNT_SYNCING = 3;
  MOUNT_DEGRADED = 4;
  MOUNT_UNMOUNTING = 5;
 }
 message StatusResponse {
  string version = 1;
  uint64 uptime_secs = 2;
  string mount_point = 3;
  MountState state = 4;
  uint32 open_file_handles = 5;
  uint64 fuse_ops_total = 6;
  uint64 files_indexed = 7;
  uint64 cache_size_bytes = 8;
  repeated OriginStatus origins = 9;
 }
 message OriginStatus {
  string id = 1;
  string origin_type = 2;
  HealthStatus health = 3;
  uint64 files_count = 4;
 }
 enum HealthStatus {
  HEALTH_UNKNOWN = 0;
  HEALTH_HEALTHY = 1;
  HEALTH_DEGRADED = 2;
  HEALTH_UNHEALTHY = 3;
 }
 message ShutdownRequest {
  bool graceful = 1;
  uint32 timeout_secs = 2;
 }
 message TierStats {
  uint64 entries = 1;
  uint64 size_bytes = 2;
  uint64 hits = 3;
  uint64 misses = 4;
 }
 message CacheStats {
  uint64 total_size_bytes = 1;
  uint64 used_size_bytes = 2;
  uint64 size_limit_bytes = 3;
  uint64 chunk_count = 4;
  uint64 chunks_unique = 5;
  double dedup_ratio = 6;
  uint64 hit_count = 7;
  uint64 miss_count = 8;
  double hit_ratio = 9;
  uint64 metadata_entries = 10;
  uint64 metadata_bytes = 11;
  TierStats l1_metadata = 12;
  TierStats l2_headers = 13;
  TierStats l3_chunks = 14;
 }
 message ClearCacheRequest {
  optional string origin_id = 1;
  bool clear_metadata = 2;
  bool clear_chunks = 3;
 }
 message ClearCacheResponse {
  uint64 bytes_cleared = 1;
  uint64 chunks_cleared = 2;
 }
 message PrefetchRequest {
  repeated string paths = 1;
  optional string origin_id = 2;
 }
 message PrefetchProgress {
  string current_path = 1;
  uint32 completed = 2;
  uint32 total = 3;
  uint64 bytes_fetched = 4;
 }
 message OriginsResponse {
  repeated OriginInfo origins = 1;
 }
 message OriginInfo {
  string id = 1;
  string origin_type = 2;
  string display_name = 3;
  string root_path = 4;
  HealthStatus health = 5;
  uint64 files_count = 6;
  uint64 total_size_bytes = 7;
 }
 message OriginRequest {
  string origin_id = 1;
  // Optional subdirectory to scope the scan (relative to origin root).
  // If empty, scans the entire origin.
  // Example: "Metallica - Master of Puppets (1986) [FLAC]"
  optional string subdir = 2;
 }
 message OriginHealthResponse {
  string origin_id = 1;
  HealthStatus status = 2;
  optional string message = 3;
  uint64 last_check_secs = 4;
 }
 message SyncProgress {
  string phase = 1;
  uint32 current = 2;
  uint32 total = 3;
  string current_path = 4;
  uint64 bytes_synced = 5;
  repeated SyncedFile new_files = 6;
 }
 message SyncedFile {
  string path = 1;
  int64 file_id = 2;
  string virtual_path = 3;
 }
 message EventFilter {
  repeated string event_types = 1;
  optional string origin_id = 2;
 }
 message Event {
  string event_type = 1;
  int64 timestamp_ms = 2;
  optional string origin_id = 3;
  optional string path = 4;
  optional int64 file_id = 5;
  map<string, string> metadata = 6;
 }
 // MetadataService messages
 message GetMetadataRequest {
  string virtual_path = 1;
 }
 message MetadataResponse {
  int64 file_id = 1;
  optional string title = 2;
  optional string artist = 3;
  optional string album = 4;
  optional string album_artist = 5;
  optional uint32 year = 6;
  optional uint32 track = 7;
  optional uint32 disc = 8;
  optional string genre = 9;
  optional string format = 10;
  optional uint64 duration_ms = 11;
  optional uint64 bitrate = 12;
  optional uint32 track_total = 13;
  optional uint32 disc_total = 14;
  optional string date = 15;
  optional string composer = 16;
  optional string comment = 17;
  optional string lyrics = 18;
  optional string copyright = 19;
  optional bool compilation = 20;
  optional string artist_sort = 21;
  optional string album_artist_sort = 22;
  optional string album_sort = 23;
  optional string title_sort = 24;
  optional string mb_recording_id = 25;
  optional string mb_album_id = 26;
  optional string mb_artist_id = 27;
  optional string mb_album_artist_id = 28;
  optional string mb_release_group_id = 29;
  optional float replaygain_track_gain = 30;
  optional float replaygain_track_peak = 31;
  optional float replaygain_album_gain = 32;
  optional float replaygain_album_peak = 33;
  optional uint32 channels = 34;
  optional uint32 bits_per_sample = 35;
  optional string encoder = 36;
  optional string label = 40;
  optional string album_type = 41;
  optional string cover_url = 42;
  map<string, string> custom_tags = 50;
 }
 message UpdateMetadataRequest {
  int64 file_id = 1;
  optional string title = 2;
  optional string artist = 3;
  optional string album = 4;
  optional string album_artist = 5;
  optional uint32 track_number = 6;
  optional uint32 disc_number = 7;
  optional string date = 8;
  optional string genre = 9;
  optional string composer = 10;
  optional string comment = 11;
  optional string lyrics = 12;
  optional string copyright = 13;
  optional bool compilation = 14;
  optional string artist_sort = 15;
  optional string album_artist_sort = 16;
  optional string album_sort = 17;
  optional string title_sort = 18;
  optional string mb_recording_id = 20;
  optional string mb_album_id = 21;
  optional string mb_artist_id = 22;
  optional float replaygain_track_gain = 30;
  optional float replaygain_track_peak = 31;
  optional float replaygain_album_gain = 32;
  optional float replaygain_album_peak = 33;
  optional string label = 40;
  optional string album_type = 41;
  optional string cover_url = 42;
  map<string, string> custom_tags = 50;
 }
 message UpdateMetadataResponse {
  int64 file_id = 1;
  bool success = 2;
  optional string error_message = 3;
 }
 message ClearOverlayRequest {
  int64 file_id = 1;
 }
 message ClearOverlayResponse {
  int64 file_id = 1;
  bool success = 2;
  optional string error_message = 3;
 }
 message BatchUpdateRequest {
  repeated BatchUpdateItem items = 1;
 }
 message BatchUpdateItem {
  int64 file_id = 1;
  UpdateMetadataRequest metadata = 2;
 }
 message BatchUpdateProgress {
  uint32 completed = 1;
  uint32 total = 2;
  optional int64 current_file_id = 3;
  optional string error_message = 4;
 }
 message ImportMetadataRequest {
  string source_path = 1;
  optional string format = 2;
 }
 message ImportProgress {
  uint32 imported = 1;
  uint32 total = 2;
  optional string current_file = 3;
  optional string error_message = 4;
 }
@@ -1,21 +0,0 @@
 pub mod proto {
    pub mod musicfs {
        pub mod v1 {
            tonic::include_proto!("musicfs.v1");
        }
    }
 }
 mod metadata;
 pub mod scanner;
 mod search_service;
 mod server;
 mod webhook;
 pub use metadata::MetadataServiceImpl;
 pub use proto::musicfs::v1::metadata_service_server::MetadataServiceServer;
 pub use proto::musicfs::v1::music_fs_server::{MusicFs, MusicFsServer as MusicFsGrpcServer};
 pub use proto::musicfs::v1::*;
 pub use search_service::SearchService;
 pub use server::MusicFsServer;
 pub use webhook::{WebhookConfig, WebhookHandler, WebhookPayload};
@@ -1,794 +0,0 @@
 //! MetadataService gRPC handlers for metadata overlay operations.
 use crate::proto::musicfs::v1::{
    metadata_service_server::MetadataService, BatchUpdateProgress, BatchUpdateRequest,
    ClearOverlayRequest, ClearOverlayResponse, GetMetadataRequest, ImportMetadataRequest,
    ImportProgress, MetadataResponse, UpdateMetadataRequest, UpdateMetadataResponse,
 };
 use musicfs_cache::{Database, EnrichmentUpdate};
 use musicfs_core::{AudioMeta, FileId, VirtualPath};
 use std::sync::Arc;
 use tokio::sync::mpsc;
 use tokio_stream::wrappers::ReceiverStream;
 use tonic::{Request, Response, Status};
 use tracing::{debug, info, instrument, warn};
 /// gRPC service implementation for metadata operations.
 pub struct MetadataServiceImpl {
    db: Arc<Database>,
 }
 impl MetadataServiceImpl {
    /// Create a new MetadataServiceImpl with the given database.
    pub fn new(db: Arc<Database>) -> Self {
        Self { db }
    }
    /// Convert AudioMeta to MetadataResponse proto message.
    fn audio_meta_to_response(file_id: FileId, meta: &AudioMeta) -> MetadataResponse {
        MetadataResponse {
            file_id: file_id.0,
            title: meta.title.clone(),
            artist: meta.artist.clone(),
            album: meta.album.clone(),
            album_artist: meta.album_artist.clone(),
            year: meta.year,
            track: meta.track,
            disc: meta.disc,
            genre: meta.genre.clone(),
            format: Some(format!("{:?}", meta.format)),
            duration_ms: meta.duration_ms,
            bitrate: meta.bitrate.map(|b| b as u64),
            track_total: meta.track_total,
            disc_total: meta.disc_total,
            date: meta.date.clone(),
            composer: meta.composer.clone(),
            comment: meta.comment.clone(),
            lyrics: meta.lyrics.clone(),
            copyright: meta.copyright.clone(),
            compilation: meta.compilation,
            artist_sort: meta.artist_sort.clone(),
            album_artist_sort: meta.album_artist_sort.clone(),
            album_sort: meta.album_sort.clone(),
            title_sort: meta.title_sort.clone(),
            mb_recording_id: meta.mb_recording_id.clone(),
            mb_album_id: meta.mb_album_id.clone(),
            mb_artist_id: meta.mb_artist_id.clone(),
            mb_album_artist_id: meta.mb_album_artist_id.clone(),
            mb_release_group_id: meta.mb_release_group_id.clone(),
            replaygain_track_gain: meta.replaygain_track_gain,
            replaygain_track_peak: meta.replaygain_track_peak,
            replaygain_album_gain: meta.replaygain_album_gain,
            replaygain_album_peak: meta.replaygain_album_peak,
            channels: meta.channels,
            bits_per_sample: meta.bits_per_sample,
            encoder: meta.encoder.clone(),
            label: None,
            album_type: None,
            cover_url: None,
            custom_tags: Default::default(),
        }
    }
    /// Convert UpdateMetadataRequest to AudioMeta for database update.
    fn request_to_audio_meta(req: &UpdateMetadataRequest) -> AudioMeta {
        AudioMeta {
            title: req.title.clone(),
            artist: req.artist.clone(),
            album: req.album.clone(),
            album_artist: req.album_artist.clone(),
            genre: req.genre.clone(),
            year: None,
            track: req.track_number,
            disc: req.disc_number,
            duration_ms: None,
            bitrate: None,
            sample_rate: None,
            format: musicfs_core::AudioFormat::Unknown,
            track_total: None,
            disc_total: None,
            date: req.date.clone(),
            composer: req.composer.clone(),
            comment: req.comment.clone(),
            lyrics: req.lyrics.clone(),
            copyright: req.copyright.clone(),
            compilation: req.compilation,
            artist_sort: req.artist_sort.clone(),
            album_artist_sort: req.album_artist_sort.clone(),
            album_sort: req.album_sort.clone(),
            title_sort: req.title_sort.clone(),
            mb_recording_id: req.mb_recording_id.clone(),
            mb_album_id: req.mb_album_id.clone(),
            mb_artist_id: req.mb_artist_id.clone(),
            mb_album_artist_id: None,
            mb_release_group_id: None,
            replaygain_track_gain: req.replaygain_track_gain,
            replaygain_track_peak: req.replaygain_track_peak,
            replaygain_album_gain: req.replaygain_album_gain,
            replaygain_album_peak: req.replaygain_album_peak,
            channels: None,
            bits_per_sample: None,
            encoder: None,
        }
    }
 }
 #[tonic::async_trait]
 impl MetadataService for MetadataServiceImpl {
    #[instrument(level = "debug", skip(self, request), fields(method = "get_metadata"))]
    async fn get_metadata(
        &self,
        request: Request<GetMetadataRequest>,
    ) -> Result<Response<MetadataResponse>, Status> {
        let req = request.into_inner();
        debug!(virtual_path = %req.virtual_path, "GetMetadata request");
        if req.virtual_path.is_empty() {
            return Err(Status::invalid_argument("virtual_path cannot be empty"));
        }
        let vpath = VirtualPath::new(&req.virtual_path);
        let file_meta = self
            .db
            .get_file_by_virtual_path(&vpath)
            .map_err(|e| Status::internal(format!("Database error: {}", e)))?
            .ok_or_else(|| Status::not_found(format!("File not found: {}", req.virtual_path)))?;
        let audio_meta = self
            .db
            .get_file_metadata_row(file_meta.id)
            .map_err(|e| Status::internal(format!("Failed to get metadata: {}", e)))?;
        let response = Self::audio_meta_to_response(file_meta.id, &audio_meta);
        Ok(Response::new(response))
    }
    #[instrument(
        level = "info",
        skip(self, request),
        fields(method = "update_metadata")
    )]
    async fn update_metadata(
        &self,
        request: Request<UpdateMetadataRequest>,
    ) -> Result<Response<UpdateMetadataResponse>, Status> {
        let req = request.into_inner();
        let file_id = FileId(req.file_id);
        info!(file_id = req.file_id, "UpdateMetadata request");
        if req.file_id <= 0 {
            return Err(Status::invalid_argument("file_id must be positive"));
        }
        let audio_meta = Self::request_to_audio_meta(&req);
        if let Err(e) = self.db.update_metadata(file_id, &audio_meta) {
            warn!(file_id = req.file_id, error = %e, "Failed to update metadata");
            return Ok(Response::new(UpdateMetadataResponse {
                file_id: req.file_id,
                success: false,
                error_message: Some(e.to_string()),
            }));
        }
        if req.label.is_some() || req.album_type.is_some() || req.cover_url.is_some() {
            let enrichment = EnrichmentUpdate {
                label: req.label.clone(),
                album_type: req.album_type.clone(),
                cover_url: req.cover_url.clone(),
                genres_json: None,
                primary_genre: None,
                source: "orchestrator".to_string(),
            };
            if let Err(e) = self.db.update_enrichment(file_id, &enrichment) {
                warn!(file_id = req.file_id, error = %e, "Failed to update enrichment");
                return Ok(Response::new(UpdateMetadataResponse {
                    file_id: req.file_id,
                    success: false,
                    error_message: Some(e.to_string()),
                }));
            }
        }
        debug!(file_id = req.file_id, "Metadata updated successfully");
        Ok(Response::new(UpdateMetadataResponse {
            file_id: req.file_id,
            success: true,
            error_message: None,
        }))
    }
    #[instrument(level = "info", skip(self, request), fields(method = "clear_overlay"))]
    async fn clear_overlay(
        &self,
        request: Request<ClearOverlayRequest>,
    ) -> Result<Response<ClearOverlayResponse>, Status> {
        let req = request.into_inner();
        let file_id = FileId(req.file_id);
        info!(file_id = req.file_id, "ClearOverlay request");
        if req.file_id <= 0 {
            return Err(Status::invalid_argument("file_id must be positive"));
        }
        match self.db.clear_overlay(file_id) {
            Ok(()) => {
                debug!(file_id = req.file_id, "Overlay cleared successfully");
                Ok(Response::new(ClearOverlayResponse {
                    file_id: req.file_id,
                    success: true,
                    error_message: None,
                }))
            }
            Err(e) => {
                warn!(file_id = req.file_id, error = %e, "Failed to clear overlay");
                Ok(Response::new(ClearOverlayResponse {
                    file_id: req.file_id,
                    success: false,
                    error_message: Some(e.to_string()),
                }))
            }
        }
    }
    type BatchUpdateMetadataStream = ReceiverStream<Result<BatchUpdateProgress, Status>>;
    #[instrument(
        level = "info",
        skip(self, request),
        fields(method = "batch_update_metadata")
    )]
    async fn batch_update_metadata(
        &self,
        request: Request<BatchUpdateRequest>,
    ) -> Result<Response<Self::BatchUpdateMetadataStream>, Status> {
        let req = request.into_inner();
        let total = req.items.len() as u32;
        info!(item_count = total, "BatchUpdateMetadata request");
        let (tx, rx) = mpsc::channel(32);
        let db = Arc::clone(&self.db);
        tokio::spawn(async move {
            for (i, item) in req.items.into_iter().enumerate() {
                let file_id = FileId(item.file_id);
                let completed = (i + 1) as u32;
                let error_message = if let Some(ref metadata_req) = item.metadata {
                    let audio_meta = MetadataServiceImpl::request_to_audio_meta(metadata_req);
                    match db.update_metadata(file_id, &audio_meta) {
                        Ok(()) => {
                            if metadata_req.label.is_some()
                                || metadata_req.album_type.is_some()
                                || metadata_req.cover_url.is_some()
                            {
                                let enrichment = EnrichmentUpdate {
                                    label: metadata_req.label.clone(),
                                    album_type: metadata_req.album_type.clone(),
                                    cover_url: metadata_req.cover_url.clone(),
                                    genres_json: None,
                                    primary_genre: None,
                                    source: "orchestrator".to_string(),
                                };
                                if let Err(e) = db.update_enrichment(file_id, &enrichment) {
                                    Some(e.to_string())
                                } else {
                                    None
                                }
                            } else {
                                None
                            }
                        }
                        Err(e) => Some(e.to_string()),
                    }
                } else {
                    Some("Missing metadata in batch item".to_string())
                };
                let progress = BatchUpdateProgress {
                    completed,
                    total,
                    current_file_id: Some(item.file_id),
                    error_message,
                };
                if tx.send(Ok(progress)).await.is_err() {
                    break;
                }
            }
        });
        Ok(Response::new(ReceiverStream::new(rx)))
    }
    type ImportMetadataStream = ReceiverStream<Result<ImportProgress, Status>>;
    #[instrument(
        level = "info",
        skip(self, request),
        fields(method = "import_metadata")
    )]
    async fn import_metadata(
        &self,
        request: Request<ImportMetadataRequest>,
    ) -> Result<Response<Self::ImportMetadataStream>, Status> {
        let req = request.into_inner();
        info!(source_path = %req.source_path, format = ?req.format, "ImportMetadata request");
        if req.source_path.is_empty() {
            return Err(Status::invalid_argument("source_path cannot be empty"));
        }
        let (tx, rx) = mpsc::channel(32);
        let db = Arc::clone(&self.db);
        let source_path = req.source_path.clone();
        let format = req.format.clone();
        tokio::spawn(async move {
            let file_format = format.as_deref().unwrap_or_else(|| {
                if source_path.ends_with(".csv") {
                    "csv"
                } else if source_path.ends_with(".json") {
                    "json"
                } else {
                    "unknown"
                }
            });
            let content = match tokio::fs::read_to_string(&source_path).await {
                Ok(c) => c,
                Err(e) => {
                    let _ = tx
                        .send(Ok(ImportProgress {
                            imported: 0,
                            total: 0,
                            current_file: None,
                            error_message: Some(format!("Failed to read file: {}", e)),
                        }))
                        .await;
                    return;
                }
            };
            let entries: Vec<ImportEntry> = match file_format {
                "json" => match serde_json::from_str::<Vec<ImportEntry>>(&content) {
                    Ok(e) => e,
                    Err(e) => {
                        let _ = tx
                            .send(Ok(ImportProgress {
                                imported: 0,
                                total: 0,
                                current_file: None,
                                error_message: Some(format!("Failed to parse JSON: {}", e)),
                            }))
                            .await;
                        return;
                    }
                },
                "csv" => match parse_csv_entries(&content) {
                    Ok(e) => e,
                    Err(e) => {
                        let _ = tx
                            .send(Ok(ImportProgress {
                                imported: 0,
                                total: 0,
                                current_file: None,
                                error_message: Some(format!("Failed to parse CSV: {}", e)),
                            }))
                            .await;
                        return;
                    }
                },
                _ => {
                    let _ = tx
                        .send(Ok(ImportProgress {
                            imported: 0,
                            total: 0,
                            current_file: None,
                            error_message: Some(format!("Unsupported format: {}", file_format)),
                        }))
                        .await;
                    return;
                }
            };
            let total = entries.len() as u32;
            let mut imported = 0u32;
            for entry in entries {
                let vpath = VirtualPath::new(&entry.virtual_path);
                let file_meta = match db.get_file_by_virtual_path(&vpath) {
                    Ok(Some(f)) => f,
                    Ok(None) => {
                        let progress = ImportProgress {
                            imported,
                            total,
                            current_file: Some(entry.virtual_path.clone()),
                            error_message: Some(format!("File not found: {}", entry.virtual_path)),
                        };
                        if tx.send(Ok(progress)).await.is_err() {
                            break;
                        }
                        continue;
                    }
                    Err(e) => {
                        let progress = ImportProgress {
                            imported,
                            total,
                            current_file: Some(entry.virtual_path.clone()),
                            error_message: Some(format!("Database error: {}", e)),
                        };
                        if tx.send(Ok(progress)).await.is_err() {
                            break;
                        }
                        continue;
                    }
                };
                let audio_meta = entry.to_audio_meta();
                let error_message = match db.update_metadata(file_meta.id, &audio_meta) {
                    Ok(()) => {
                        imported += 1;
                        None
                    }
                    Err(e) => Some(e.to_string()),
                };
                let progress = ImportProgress {
                    imported,
                    total,
                    current_file: Some(entry.virtual_path),
                    error_message,
                };
                if tx.send(Ok(progress)).await.is_err() {
                    break;
                }
            }
        });
        Ok(Response::new(ReceiverStream::new(rx)))
    }
 }
 /// Entry from import file (CSV or JSON).
 #[derive(Debug, Clone, serde::Deserialize)]
 struct ImportEntry {
    virtual_path: String,
    #[serde(default)]
    title: Option<String>,
    #[serde(default)]
    artist: Option<String>,
    #[serde(default)]
    album: Option<String>,
    #[serde(default)]
    album_artist: Option<String>,
    #[serde(default)]
    genre: Option<String>,
    #[serde(default)]
    year: Option<u32>,
    #[serde(default)]
    track: Option<u32>,
    #[serde(default)]
    disc: Option<u32>,
    #[serde(default)]
    date: Option<String>,
    #[serde(default)]
    composer: Option<String>,
    #[serde(default)]
    comment: Option<String>,
 }
 impl ImportEntry {
    fn to_audio_meta(&self) -> AudioMeta {
        AudioMeta {
            title: self.title.clone(),
            artist: self.artist.clone(),
            album: self.album.clone(),
            album_artist: self.album_artist.clone(),
            genre: self.genre.clone(),
            year: self.year,
            track: self.track,
            disc: self.disc,
            duration_ms: None,
            bitrate: None,
            sample_rate: None,
            format: musicfs_core::AudioFormat::Unknown,
            track_total: None,
            disc_total: None,
            date: self.date.clone(),
            composer: self.composer.clone(),
            comment: self.comment.clone(),
            lyrics: None,
            copyright: None,
            compilation: None,
            artist_sort: None,
            album_artist_sort: None,
            album_sort: None,
            title_sort: None,
            mb_recording_id: None,
            mb_album_id: None,
            mb_artist_id: None,
            mb_album_artist_id: None,
            mb_release_group_id: None,
            replaygain_track_gain: None,
            replaygain_track_peak: None,
            replaygain_album_gain: None,
            replaygain_album_peak: None,
            channels: None,
            bits_per_sample: None,
            encoder: None,
        }
    }
 }
 /// Parse CSV content into ImportEntry list.
 fn parse_csv_entries(content: &str) -> Result<Vec<ImportEntry>, String> {
    let mut reader = csv::Reader::from_reader(content.as_bytes());
    let mut entries = Vec::new();
    for result in reader.deserialize() {
        let entry: ImportEntry = result.map_err(|e| format!("CSV parse error: {}", e))?;
        entries.push(entry);
    }
    Ok(entries)
 }
 #[cfg(test)]
 mod tests {
    use super::*;
    use crate::proto::musicfs::v1::BatchUpdateItem;
    use musicfs_core::{AudioFormat, OriginId};
    use std::path::Path;
    use std::time::UNIX_EPOCH;
    use tempfile::TempDir;
    use tokio_stream::StreamExt;
    fn create_test_db() -> (TempDir, Arc<Database>) {
        let dir = TempDir::new().unwrap();
        let db = Arc::new(Database::open_memory().unwrap());
        (dir, db)
    }
    fn insert_test_file(db: &Database, vpath: &str) -> FileId {
        let real_path = format!("/music{}", vpath);
        db.upsert_file(
            &OriginId::from("local"),
            Path::new(&real_path),
            &VirtualPath::new(vpath),
            &AudioMeta {
                title: Some("Test Track".to_string()),
                artist: Some("Test Artist".to_string()),
                album: Some("Test Album".to_string()),
                format: AudioFormat::Flac,
                ..Default::default()
            },
            UNIX_EPOCH,
            1000,
        )
        .unwrap()
    }
    #[tokio::test]
    async fn test_get_metadata_success() {
        let (_dir, db) = create_test_db();
        let vpath = "/Artist/Album/Track.flac";
        insert_test_file(&db, vpath);
        let service = MetadataServiceImpl::new(db);
        let request = Request::new(GetMetadataRequest {
            virtual_path: vpath.to_string(),
        });
        let response = service.get_metadata(request).await.unwrap();
        let meta = response.into_inner();
        assert_eq!(meta.title, Some("Test Track".to_string()));
        assert_eq!(meta.artist, Some("Test Artist".to_string()));
        assert_eq!(meta.album, Some("Test Album".to_string()));
    }
    #[tokio::test]
    async fn test_get_metadata_not_found() {
        let (_dir, db) = create_test_db();
        let service = MetadataServiceImpl::new(db);
        let request = Request::new(GetMetadataRequest {
            virtual_path: "/nonexistent.flac".to_string(),
        });
        let result = service.get_metadata(request).await;
        assert!(result.is_err());
        assert_eq!(result.unwrap_err().code(), tonic::Code::NotFound);
    }
    #[tokio::test]
    async fn test_get_metadata_empty_path() {
        let (_dir, db) = create_test_db();
        let service = MetadataServiceImpl::new(db);
        let request = Request::new(GetMetadataRequest {
            virtual_path: String::new(),
        });
        let result = service.get_metadata(request).await;
        assert!(result.is_err());
        assert_eq!(result.unwrap_err().code(), tonic::Code::InvalidArgument);
    }
    #[tokio::test]
    async fn test_update_metadata_success() {
        let (_dir, db) = create_test_db();
        let vpath = "/Artist/Album/Track.flac";
        let file_id = insert_test_file(&db, vpath);
        let service = MetadataServiceImpl::new(db.clone());
        let request = Request::new(UpdateMetadataRequest {
            file_id: file_id.0,
            title: Some("Updated Title".to_string()),
            artist: Some("Updated Artist".to_string()),
            ..Default::default()
        });
        let response = service.update_metadata(request).await.unwrap();
        let result = response.into_inner();
        assert!(result.success);
        assert!(result.error_message.is_none());
        let meta = db.get_file_metadata_row(file_id).unwrap();
        assert_eq!(meta.title, Some("Updated Title".to_string()));
        assert_eq!(meta.artist, Some("Updated Artist".to_string()));
    }
    #[tokio::test]
    async fn test_update_metadata_invalid_id() {
        let (_dir, db) = create_test_db();
        let service = MetadataServiceImpl::new(db);
        let request = Request::new(UpdateMetadataRequest {
            file_id: 0,
            title: Some("Title".to_string()),
            ..Default::default()
        });
        let result = service.update_metadata(request).await;
        assert!(result.is_err());
        assert_eq!(result.unwrap_err().code(), tonic::Code::InvalidArgument);
    }
    #[tokio::test]
    async fn test_clear_overlay_success() {
        let (_dir, db) = create_test_db();
        let vpath = "/Artist/Album/Track.flac";
        let file_id = insert_test_file(&db, vpath);
        let service = MetadataServiceImpl::new(db.clone());
        let request = Request::new(ClearOverlayRequest { file_id: file_id.0 });
        let response = service.clear_overlay(request).await.unwrap();
        let result = response.into_inner();
        assert!(result.success);
        assert!(result.error_message.is_none());
        let meta = db.get_file_metadata_row(file_id).unwrap();
        assert!(meta.title.is_none());
        assert!(meta.artist.is_none());
    }
    #[tokio::test]
    async fn test_clear_overlay_invalid_id() {
        let (_dir, db) = create_test_db();
        let service = MetadataServiceImpl::new(db);
        let request = Request::new(ClearOverlayRequest { file_id: -1 });
        let result = service.clear_overlay(request).await;
        assert!(result.is_err());
        assert_eq!(result.unwrap_err().code(), tonic::Code::InvalidArgument);
    }
    #[tokio::test]
    async fn test_batch_update_metadata() {
        let (_dir, db) = create_test_db();
        let file_id1 = insert_test_file(&db, "/Track1.flac");
        let file_id2 = insert_test_file(&db, "/Track2.flac");
        let service = MetadataServiceImpl::new(db.clone());
        let request = Request::new(BatchUpdateRequest {
            items: vec![
                BatchUpdateItem {
                    file_id: file_id1.0,
                    metadata: Some(UpdateMetadataRequest {
                        file_id: file_id1.0,
                        title: Some("Batch Title 1".to_string()),
                        ..Default::default()
                    }),
                },
                BatchUpdateItem {
                    file_id: file_id2.0,
                    metadata: Some(UpdateMetadataRequest {
                        file_id: file_id2.0,
                        title: Some("Batch Title 2".to_string()),
                        ..Default::default()
                    }),
                },
            ],
        });
        let response = service.batch_update_metadata(request).await.unwrap();
        let mut stream = response.into_inner();
        let mut progress_count = 0;
        while let Some(Ok(result)) = stream.next().await {
            progress_count += 1;
            assert!(result.error_message.is_none());
        }
        assert_eq!(progress_count, 2);
        let meta1 = db.get_file_metadata_row(file_id1).unwrap();
        assert_eq!(meta1.title, Some("Batch Title 1".to_string()));
        let meta2 = db.get_file_metadata_row(file_id2).unwrap();
        assert_eq!(meta2.title, Some("Batch Title 2".to_string()));
    }
    #[tokio::test]
    async fn test_import_metadata_empty_path() {
        let (_dir, db) = create_test_db();
        let service = MetadataServiceImpl::new(db);
        let request = Request::new(ImportMetadataRequest {
            source_path: String::new(),
            format: None,
        });
        let result = service.import_metadata(request).await;
        assert!(result.is_err());
        assert_eq!(result.unwrap_err().code(), tonic::Code::InvalidArgument);
    }
    #[test]
    fn test_parse_csv_entries() {
        let csv_content = r#"virtual_path,title,artist,album
 /Track1.flac,Title 1,Artist 1,Album 1
 /Track2.flac,Title 2,Artist 2,Album 2"#;
        let entries = parse_csv_entries(csv_content).unwrap();
        assert_eq!(entries.len(), 2);
        assert_eq!(entries[0].virtual_path, "/Track1.flac");
        assert_eq!(entries[0].title, Some("Title 1".to_string()));
        assert_eq!(entries[1].virtual_path, "/Track2.flac");
        assert_eq!(entries[1].artist, Some("Artist 2".to_string()));
    }
    #[test]
    fn test_import_entry_to_audio_meta() {
        let entry = ImportEntry {
            virtual_path: "/test.flac".to_string(),
            title: Some("Test".to_string()),
            artist: Some("Artist".to_string()),
            album: None,
            album_artist: None,
            genre: Some("Rock".to_string()),
            year: Some(2024),
            track: Some(1),
            disc: None,
            date: None,
            composer: None,
            comment: None,
        };
        let meta = entry.to_audio_meta();
        assert_eq!(meta.title, Some("Test".to_string()));
        assert_eq!(meta.artist, Some("Artist".to_string()));
        assert_eq!(meta.genre, Some("Rock".to_string()));
        assert_eq!(meta.year, Some(2024));
        assert_eq!(meta.track, Some(1));
    }
 }
@@ -1,261 +0,0 @@
 use musicfs_cache::{Database, VirtualTree};
 use musicfs_cas::ContentFetcher;
 use musicfs_core::{
    AudioMeta, Error, Event, EventBus, FileId, FileMeta, OriginId, RealPath, Result, VirtualPath,
 };
 use musicfs_metadata::MetadataParser;
 use parking_lot::RwLock;
 use std::path::{Path, PathBuf};
 use std::sync::Arc;
 use std::time::UNIX_EPOCH;
 use tokio::sync::mpsc;
 use tracing::{info, warn};
 pub struct ScanResult {
    pub new_files: Vec<SyncedFileInfo>,
    pub changed: u32,
    pub deleted: u32,
    pub unchanged: u32,
    pub bytes_synced: u64,
 }
 pub struct SyncedFileInfo {
    pub path: String,
    pub file_id: FileId,
    pub virtual_path: String,
 }
 #[derive(Debug, Clone)]
 pub struct ScanProgress {
    pub phase: String,
    pub current: u32,
    pub total: u32,
    pub current_path: String,
    pub bytes_synced: u64,
 }
 pub struct OriginScanner {
    db: Arc<Database>,
    event_bus: Arc<EventBus>,
    tree: Arc<RwLock<VirtualTree>>,
    fetcher: Arc<ContentFetcher>,
    parser: MetadataParser,
 }
 impl OriginScanner {
    pub fn new(
        db: Arc<Database>,
        event_bus: Arc<EventBus>,
        tree: Arc<RwLock<VirtualTree>>,
        fetcher: Arc<ContentFetcher>,
    ) -> Self {
        Self {
            db,
            event_bus,
            tree,
            fetcher,
            parser: MetadataParser,
        }
    }
    pub async fn scan(
        &self,
        origin_id: &OriginId,
        origin_root: &Path,
        subdir: Option<&str>,
        progress_tx: mpsc::Sender<ScanProgress>,
    ) -> Result<ScanResult> {
        let scan_root = match subdir {
            Some(sub) if !sub.is_empty() => origin_root.join(sub),
            _ => origin_root.to_path_buf(),
        };
        if !scan_root.exists() {
            return Err(Error::Origin(format!(
                "scan path does not exist: {}",
                scan_root.display()
            )));
        }
        // Phase 1: Scanning
        let audio_files = self.collect_audio_files(&scan_root, &progress_tx)?;
        let total_files = audio_files.len() as u32;
        info!(files = total_files, "scan phase complete");
        // Phase 2: Hashing + categorization
        let mut new_files = Vec::new();
        let mut unchanged = 0u32;
        for (i, abs_path) in audio_files.iter().enumerate() {
            let _ = progress_tx.try_send(ScanProgress {
                phase: "hashing".to_string(),
                current: i as u32 + 1,
                total: total_files,
                current_path: abs_path.display().to_string(),
                bytes_synced: 0,
            });
            let rel_path = abs_path.strip_prefix(origin_root).unwrap_or(abs_path);
            let existing = self.db.get_file_by_real_path(origin_id, rel_path)?;
            if existing.is_some() {
                unchanged += 1;
                continue;
            }
            let size = std::fs::metadata(abs_path).map(|m| m.len()).unwrap_or(0);
            new_files.push(DiscoveredFile {
                abs_path: abs_path.clone(),
                rel_path: rel_path.to_path_buf(),
                size,
            });
        }
        info!(
            new = new_files.len(),
            unchanged = unchanged,
            "hash phase complete"
        );
        // Phase 3: Indexing
        let mut synced = Vec::new();
        let mut bytes_synced = 0u64;
        let ingest_total = new_files.len() as u32;
        for (i, file) in new_files.iter().enumerate() {
            let _ = progress_tx.try_send(ScanProgress {
                phase: "indexing".to_string(),
                current: i as u32 + 1,
                total: ingest_total,
                current_path: file.abs_path.display().to_string(),
                bytes_synced,
            });
            let audio_meta = match self.parser.parse_file(&file.abs_path) {
                Ok(meta) => meta,
                Err(e) => {
                    warn!(path = %file.abs_path.display(), error = %e, "parse failed, using defaults");
                    AudioMeta::default()
                }
            };
            let virtual_path = derive_virtual_path(&audio_meta, &file.rel_path);
            let file_id = self.db.upsert_file(
                origin_id,
                &file.rel_path,
                &virtual_path,
                &audio_meta,
                UNIX_EPOCH,
                file.size,
            )?;
            let file_meta = FileMeta {
                id: file_id,
                virtual_path: virtual_path.clone(),
                real_path: RealPath {
                    origin_id: origin_id.clone(),
                    path: file.rel_path.clone(),
                },
                size: file.size,
                mtime: UNIX_EPOCH,
                content_hash: None,
                audio: Some(audio_meta),
            };
            {
                let mut tree = self.tree.write();
                tree.insert_file(&file_meta);
            }
            self.fetcher.register_file(file_meta.clone());
            self.event_bus.publish(Event::FileAdded {
                path: virtual_path.clone(),
                origin_id: origin_id.clone(),
            });
            bytes_synced += file.size;
            synced.push(SyncedFileInfo {
                path: file.abs_path.display().to_string(),
                file_id,
                virtual_path: virtual_path.as_str().to_string(),
            });
        }
        Ok(ScanResult {
            new_files: synced,
            changed: 0,
            deleted: 0,
            unchanged,
            bytes_synced,
        })
    }
    fn collect_audio_files(
        &self,
        scan_root: &Path,
        progress_tx: &mpsc::Sender<ScanProgress>,
    ) -> Result<Vec<PathBuf>> {
        let mut files = Vec::new();
        self.walk_dir(scan_root, &mut files, progress_tx)?;
        Ok(files)
    }
    fn walk_dir(
        &self,
        dir: &Path,
        files: &mut Vec<PathBuf>,
        progress_tx: &mpsc::Sender<ScanProgress>,
    ) -> Result<()> {
        let entries = std::fs::read_dir(dir)
            .map_err(|e| Error::Origin(format!("read_dir {}: {}", dir.display(), e)))?;
        for entry in entries.flatten() {
            let path = entry.path();
            if path.is_dir() {
                self.walk_dir(&path, files, progress_tx)?;
            } else if is_audio_file(&path) {
                files.push(path.clone());
                let _ = progress_tx.try_send(ScanProgress {
                    phase: "scanning".to_string(),
                    current: files.len() as u32,
                    total: 0,
                    current_path: path.display().to_string(),
                    bytes_synced: 0,
                });
            }
        }
        Ok(())
    }
 }
 fn derive_virtual_path(meta: &AudioMeta, rel_path: &Path) -> VirtualPath {
    let artist = meta.artist.as_deref().unwrap_or("Unknown Artist");
    let album = meta.album.as_deref().unwrap_or("Unknown Album");
    let filename = rel_path
        .file_name()
        .and_then(|n| n.to_str())
        .unwrap_or("unknown");
    VirtualPath::new(format!("/{}/{}/{}", artist, album, filename))
 }
 fn is_audio_file(path: &Path) -> bool {
    matches!(
        path.extension()
            .and_then(|e| e.to_str())
            .map(|e| e.to_lowercase())
            .as_deref(),
        Some("flac" | "mp3" | "ogg" | "wav" | "m4a" | "aac" | "opus")
    )
 }
 struct DiscoveredFile {
    abs_path: PathBuf,
    rel_path: PathBuf,
    size: u64,
 }
@@ -1,251 +0,0 @@
 use crate::proto::musicfs::v1::{
    music_fs_server::MusicFs, CacheStats, ClearCacheRequest, ClearCacheResponse, Empty, Event,
    EventFilter, OriginHealthResponse, OriginRequest, OriginsResponse, PrefetchProgress,
    PrefetchRequest, SearchRequest, SearchResponse, SearchResult, ShutdownRequest, StatusResponse,
    SyncProgress,
 };
 use musicfs_search::SearchIndex;
 use std::sync::Arc;
 use std::time::Instant;
 use tokio_stream::wrappers::ReceiverStream;
 use tonic::{Request, Response, Status};
 use tracing::debug;
 pub struct SearchService {
    index: Arc<SearchIndex>,
 }
 impl SearchService {
    pub fn new(index: Arc<SearchIndex>) -> Self {
        Self { index }
    }
 }
 #[tonic::async_trait]
 impl MusicFs for SearchService {
    async fn search(
        &self,
        request: Request<SearchRequest>,
    ) -> Result<Response<SearchResponse>, Status> {
        let start = Instant::now();
        let req = request.into_inner();
        if req.query.is_empty() {
            return Err(Status::invalid_argument("Query cannot be empty"));
        }
        if req.query.len() > 256 {
            return Err(Status::invalid_argument(
                "Query exceeds maximum length (256)",
            ));
        }
        let limit = req.limit.unwrap_or(100).min(10000) as usize;
        let offset = req.offset.unwrap_or(0) as usize;
        let results = self
            .index
            .search(&req.query, limit + offset)
            .map_err(|e| Status::internal(format!("Search failed: {}", e)))?;
        let hits: Vec<SearchResult> = results
            .into_iter()
            .skip(offset)
            .take(limit)
            .map(|hit| SearchResult {
                file_id: hit.file_id.0,
                virtual_path: hit.virtual_path.as_str().to_string(),
                artist: hit.artist,
                album: hit.album,
                title: hit.title,
                score: hit.score,
                highlights: Default::default(),
            })
            .collect();
        let total_matches = self.index.count();
        let query_time_ms = start.elapsed().as_millis() as u32;
        debug!(
            "Search '{}' returned {} results in {}ms",
            req.query,
            hits.len(),
            query_time_ms
        );
        Ok(Response::new(SearchResponse {
            results: hits,
            total_matches,
            query_time_ms,
        }))
    }
    type SearchStreamStream = ReceiverStream<Result<SearchResult, Status>>;
    async fn search_stream(
        &self,
        request: Request<SearchRequest>,
    ) -> Result<Response<Self::SearchStreamStream>, Status> {
        let req = request.into_inner();
        if req.query.is_empty() {
            return Err(Status::invalid_argument("Query cannot be empty"));
        }
        let limit = req.limit.unwrap_or(1000).min(10000) as usize;
        let results = self
            .index
            .search(&req.query, limit)
            .map_err(|e| Status::internal(format!("Search failed: {}", e)))?;
        let (tx, rx) = tokio::sync::mpsc::channel(100);
        tokio::spawn(async move {
            for hit in results {
                let result = SearchResult {
                    file_id: hit.file_id.0,
                    virtual_path: hit.virtual_path.as_str().to_string(),
                    artist: hit.artist,
                    album: hit.album,
                    title: hit.title,
                    score: hit.score,
                    highlights: Default::default(),
                };
                if tx.send(Ok(result)).await.is_err() {
                    break;
                }
            }
        });
        Ok(Response::new(ReceiverStream::new(rx)))
    }
    async fn get_status(
        &self,
        _request: Request<Empty>,
    ) -> Result<Response<StatusResponse>, Status> {
        Err(Status::unimplemented(
            "Use MusicFsServer for control operations",
        ))
    }
    async fn shutdown(
        &self,
        _request: Request<ShutdownRequest>,
    ) -> Result<Response<Empty>, Status> {
        Err(Status::unimplemented(
            "Use MusicFsServer for control operations",
        ))
    }
    async fn get_cache_stats(
        &self,
        _request: Request<Empty>,
    ) -> Result<Response<CacheStats>, Status> {
        Err(Status::unimplemented(
            "Use MusicFsServer for control operations",
        ))
    }
    async fn clear_cache(
        &self,
        _request: Request<ClearCacheRequest>,
    ) -> Result<Response<ClearCacheResponse>, Status> {
        Err(Status::unimplemented(
            "Use MusicFsServer for control operations",
        ))
    }
    type PrefetchStream = ReceiverStream<Result<PrefetchProgress, Status>>;
    async fn prefetch(
        &self,
        _request: Request<PrefetchRequest>,
    ) -> Result<Response<Self::PrefetchStream>, Status> {
        Err(Status::unimplemented(
            "Use MusicFsServer for control operations",
        ))
    }
    async fn list_origins(
        &self,
        _request: Request<Empty>,
    ) -> Result<Response<OriginsResponse>, Status> {
        Err(Status::unimplemented(
            "Use MusicFsServer for control operations",
        ))
    }
    async fn get_origin_health(
        &self,
        _request: Request<OriginRequest>,
    ) -> Result<Response<OriginHealthResponse>, Status> {
        Err(Status::unimplemented(
            "Use MusicFsServer for control operations",
        ))
    }
    type RescanOriginStream = ReceiverStream<Result<SyncProgress, Status>>;
    async fn rescan_origin(
        &self,
        _request: Request<OriginRequest>,
    ) -> Result<Response<Self::RescanOriginStream>, Status> {
        Err(Status::unimplemented(
            "Use MusicFsServer for control operations",
        ))
    }
    type SubscribeEventsStream = ReceiverStream<Result<Event, Status>>;
    async fn subscribe_events(
        &self,
        _request: Request<EventFilter>,
    ) -> Result<Response<Self::SubscribeEventsStream>, Status> {
        Err(Status::unimplemented(
            "Use MusicFsServer for control operations",
        ))
    }
 }
 #[cfg(test)]
 mod tests {
    use super::*;
    use tempfile::TempDir;
    #[tokio::test]
    async fn test_grpc_search_empty_query() {
        let dir = TempDir::new().unwrap();
        let index = Arc::new(SearchIndex::open(dir.path()).unwrap());
        let service = SearchService::new(index);
        let request = Request::new(SearchRequest {
            query: String::new(),
            limit: Some(10),
            offset: None,
            origin_id: None,
        });
        let result = service.search(request).await;
        assert!(result.is_err());
        assert_eq!(result.unwrap_err().code(), tonic::Code::InvalidArgument);
    }
    #[tokio::test]
    async fn test_grpc_search_returns_response() {
        let dir = TempDir::new().unwrap();
        let index = Arc::new(SearchIndex::open(dir.path()).unwrap());
        let service = SearchService::new(index);
        let request = Request::new(SearchRequest {
            query: "test".to_string(),
            limit: Some(10),
            offset: None,
            origin_id: None,
        });
        let response = service.search(request).await.unwrap();
        assert!(response.get_ref().results.is_empty());
    }
 }
@@ -1,561 +0,0 @@
 use crate::proto::musicfs::v1::{
    music_fs_server::MusicFs, CacheStats, ClearCacheRequest, ClearCacheResponse, Empty, Event,
    EventFilter, HealthStatus, MountState, OriginHealthResponse, OriginRequest, OriginsResponse,
    PrefetchProgress, PrefetchRequest, SearchRequest, SearchResponse, SearchResult,
    ShutdownRequest, StatusResponse, SyncProgress, SyncedFile, TierStats,
 };
 use musicfs_core::{Event as CoreEvent, EventBus};
 use std::sync::Arc;
 use std::time::Instant;
 use tokio::sync::mpsc;
 use tokio_stream::wrappers::ReceiverStream;
 use tonic::{Request, Response, Status};
 use tracing::{debug, info, instrument};
 pub struct MusicFsServer {
    start_time: Instant,
    event_bus: Arc<EventBus>,
    version: String,
    scanner: Arc<crate::scanner::OriginScanner>,
    origin_root: std::path::PathBuf,
 }
 impl MusicFsServer {
    pub fn new(
        event_bus: Arc<EventBus>,
        db: Arc<musicfs_cache::Database>,
        tree: Arc<parking_lot::RwLock<musicfs_cache::VirtualTree>>,
        fetcher: Arc<musicfs_cas::ContentFetcher>,
        origin_root: std::path::PathBuf,
    ) -> Self {
        let scanner = Arc::new(crate::scanner::OriginScanner::new(
            db,
            event_bus.clone(),
            tree,
            fetcher,
        ));
        Self {
            start_time: Instant::now(),
            event_bus,
            version: env!("CARGO_PKG_VERSION").to_string(),
            scanner,
            origin_root,
        }
    }
    fn event_to_proto(event: &CoreEvent) -> Event {
        let (event_type, origin_id, path, file_id) = match event {
            CoreEvent::FileAccessed {
                file_id,
                origin_id,
                path,
                ..
            } => (
                "file_accessed".to_string(),
                Some(origin_id.to_string()),
                Some(path.as_str().to_string()),
                Some(file_id.0),
            ),
            CoreEvent::FileAdded { path, origin_id } => (
                "file_added".to_string(),
                Some(origin_id.to_string()),
                Some(path.as_str().to_string()),
                None,
            ),
            CoreEvent::FileRemoved { path, file_id } => (
                "file_removed".to_string(),
                None,
                Some(path.as_str().to_string()),
                file_id.map(|id| id.0),
            ),
            CoreEvent::FileModified { path } => (
                "file_modified".to_string(),
                None,
                Some(path.as_str().to_string()),
                None,
            ),
            CoreEvent::SyncStarted { origin_id } => (
                "sync_started".to_string(),
                Some(origin_id.to_string()),
                None,
                None,
            ),
            CoreEvent::SyncCompleted {
                origin_id,
                files_changed,
            } => {
                let mut metadata = std::collections::HashMap::new();
                metadata.insert("files_changed".to_string(), files_changed.to_string());
                return Event {
                    event_type: "sync_completed".to_string(),
                    timestamp_ms: chrono::Utc::now().timestamp_millis(),
                    origin_id: Some(origin_id.to_string()),
                    path: None,
                    file_id: None,
                    metadata,
                };
            }
            CoreEvent::OriginHealthChanged { origin_id, healthy } => {
                let mut metadata = std::collections::HashMap::new();
                metadata.insert("healthy".to_string(), healthy.to_string());
                return Event {
                    event_type: "origin_health_changed".to_string(),
                    timestamp_ms: chrono::Utc::now().timestamp_millis(),
                    origin_id: Some(origin_id.to_string()),
                    path: None,
                    file_id: None,
                    metadata,
                };
            }
            CoreEvent::CacheEviction { bytes_freed } => {
                let mut metadata = std::collections::HashMap::new();
                metadata.insert("bytes_freed".to_string(), bytes_freed.to_string());
                return Event {
                    event_type: "cache_eviction".to_string(),
                    timestamp_ms: chrono::Utc::now().timestamp_millis(),
                    origin_id: None,
                    path: None,
                    file_id: None,
                    metadata,
                };
            }
            CoreEvent::OriginConnected { origin_id } => (
                "origin_connected".to_string(),
                Some(origin_id.to_string()),
                None,
                None,
            ),
            CoreEvent::OriginDisconnected { origin_id } => (
                "origin_disconnected".to_string(),
                Some(origin_id.to_string()),
                None,
                None,
            ),
            CoreEvent::AllOriginsUnhealthy { candidate_count } => {
                let mut metadata = std::collections::HashMap::new();
                metadata.insert("candidate_count".to_string(), candidate_count.to_string());
                return Event {
                    event_type: "all_origins_unhealthy".to_string(),
                    timestamp_ms: chrono::Utc::now().timestamp_millis(),
                    origin_id: None,
                    path: None,
                    file_id: None,
                    metadata,
                };
            }
        };
        Event {
            event_type,
            timestamp_ms: chrono::Utc::now().timestamp_millis(),
            origin_id,
            path,
            file_id,
            metadata: Default::default(),
        }
    }
    fn matches_filter(event: &CoreEvent, filter: &EventFilter) -> bool {
        if !filter.event_types.is_empty() {
            let event_type = match event {
                CoreEvent::FileAccessed { .. } => "file_accessed",
                CoreEvent::FileAdded { .. } => "file_added",
                CoreEvent::FileRemoved { .. } => "file_removed",
                CoreEvent::FileModified { .. } => "file_modified",
                CoreEvent::SyncStarted { .. } => "sync_started",
                CoreEvent::SyncCompleted { .. } => "sync_completed",
                CoreEvent::OriginHealthChanged { .. } => "origin_health_changed",
                CoreEvent::CacheEviction { .. } => "cache_eviction",
                CoreEvent::OriginConnected { .. } => "origin_connected",
                CoreEvent::OriginDisconnected { .. } => "origin_disconnected",
                CoreEvent::AllOriginsUnhealthy { .. } => "all_origins_unhealthy",
            };
            if !filter.event_types.iter().any(|t| t == event_type) {
                return false;
            }
        }
        if let Some(ref origin_filter) = filter.origin_id {
            let event_origin = match event {
                CoreEvent::FileAccessed { origin_id, .. }
                | CoreEvent::FileAdded { origin_id, .. }
                | CoreEvent::SyncStarted { origin_id }
                | CoreEvent::SyncCompleted { origin_id, .. }
                | CoreEvent::OriginHealthChanged { origin_id, .. }
                | CoreEvent::OriginConnected { origin_id }
                | CoreEvent::OriginDisconnected { origin_id } => Some(origin_id.to_string()),
                CoreEvent::FileRemoved { .. }
                | CoreEvent::FileModified { .. }
                | CoreEvent::CacheEviction { .. }
                | CoreEvent::AllOriginsUnhealthy { .. } => None,
            };
            if event_origin.as_ref() != Some(origin_filter) {
                return false;
            }
        }
        true
    }
 }
 #[tonic::async_trait]
 impl MusicFs for MusicFsServer {
    async fn search(
        &self,
        _request: Request<SearchRequest>,
    ) -> Result<Response<SearchResponse>, Status> {
        Err(Status::unimplemented(
            "Use SearchService for search operations",
        ))
    }
    type SearchStreamStream = ReceiverStream<Result<SearchResult, Status>>;
    async fn search_stream(
        &self,
        _request: Request<SearchRequest>,
    ) -> Result<Response<Self::SearchStreamStream>, Status> {
        Err(Status::unimplemented(
            "Use SearchService for search operations",
        ))
    }
    #[instrument(level = "debug", skip(self, _request), fields(method = "get_status"))]
    async fn get_status(
        &self,
        _request: Request<Empty>,
    ) -> Result<Response<StatusResponse>, Status> {
        debug!("gRPC get_status called");
        let uptime = self.start_time.elapsed().as_secs();
        Ok(Response::new(StatusResponse {
            version: self.version.clone(),
            uptime_secs: uptime,
            mount_point: String::new(),
            state: MountState::MountReady as i32,
            open_file_handles: 0,
            fuse_ops_total: 0,
            files_indexed: 0,
            cache_size_bytes: 0,
            origins: vec![],
        }))
    }
    #[instrument(level = "info", skip(self, request), fields(method = "shutdown"))]
    async fn shutdown(&self, request: Request<ShutdownRequest>) -> Result<Response<Empty>, Status> {
        let req = request.into_inner();
        info!(
            graceful = req.graceful,
            timeout_secs = req.timeout_secs,
            "gRPC shutdown requested"
        );
        Ok(Response::new(Empty {}))
    }
    #[instrument(
        level = "debug",
        skip(self, _request),
        fields(method = "get_cache_stats")
    )]
    async fn get_cache_stats(
        &self,
        _request: Request<Empty>,
    ) -> Result<Response<CacheStats>, Status> {
        debug!("gRPC get_cache_stats called");
        Ok(Response::new(CacheStats {
            total_size_bytes: 0,
            used_size_bytes: 0,
            size_limit_bytes: 0,
            chunk_count: 0,
            chunks_unique: 0,
            dedup_ratio: 0.0,
            hit_count: 0,
            miss_count: 0,
            hit_ratio: 0.0,
            metadata_entries: 0,
            metadata_bytes: 0,
            l1_metadata: Some(TierStats {
                entries: 0,
                size_bytes: 0,
                hits: 0,
                misses: 0,
            }),
            l2_headers: Some(TierStats {
                entries: 0,
                size_bytes: 0,
                hits: 0,
                misses: 0,
            }),
            l3_chunks: Some(TierStats {
                entries: 0,
                size_bytes: 0,
                hits: 0,
                misses: 0,
            }),
        }))
    }
    #[instrument(level = "info", skip(self, request), fields(method = "clear_cache"))]
    async fn clear_cache(
        &self,
        request: Request<ClearCacheRequest>,
    ) -> Result<Response<ClearCacheResponse>, Status> {
        let req = request.into_inner();
        info!(
            origin_id = ?req.origin_id,
            clear_metadata = req.clear_metadata,
            clear_chunks = req.clear_chunks,
            "gRPC clear_cache"
        );
        Ok(Response::new(ClearCacheResponse {
            bytes_cleared: 0,
            chunks_cleared: 0,
        }))
    }
    type PrefetchStream = ReceiverStream<Result<PrefetchProgress, Status>>;
    #[instrument(level = "debug", skip(self, request), fields(method = "prefetch"))]
    async fn prefetch(
        &self,
        request: Request<PrefetchRequest>,
    ) -> Result<Response<Self::PrefetchStream>, Status> {
        let req = request.into_inner();
        let total = req.paths.len() as u32;
        debug!(file_count = total, "gRPC prefetch started");
        let (tx, rx) = mpsc::channel(32);
        tokio::spawn(async move {
            for (i, path) in req.paths.into_iter().enumerate() {
                let progress = PrefetchProgress {
                    current_path: path,
                    completed: i as u32 + 1,
                    total,
                    bytes_fetched: 0,
                };
                if tx.send(Ok(progress)).await.is_err() {
                    break;
                }
            }
        });
        Ok(Response::new(ReceiverStream::new(rx)))
    }
    #[instrument(level = "debug", skip(self, _request), fields(method = "list_origins"))]
    async fn list_origins(
        &self,
        _request: Request<Empty>,
    ) -> Result<Response<OriginsResponse>, Status> {
        debug!("gRPC list_origins called");
        Ok(Response::new(OriginsResponse { origins: vec![] }))
    }
    #[instrument(
        level = "debug",
        skip(self, request),
        fields(method = "get_origin_health")
    )]
    async fn get_origin_health(
        &self,
        request: Request<OriginRequest>,
    ) -> Result<Response<OriginHealthResponse>, Status> {
        let req = request.into_inner();
        debug!(origin_id = %req.origin_id, "gRPC get_origin_health");
        Ok(Response::new(OriginHealthResponse {
            origin_id: req.origin_id,
            status: HealthStatus::HealthUnknown as i32,
            message: None,
            last_check_secs: 0,
        }))
    }
    type RescanOriginStream = ReceiverStream<Result<SyncProgress, Status>>;
    #[instrument(level = "info", skip(self, request), fields(method = "rescan_origin"))]
    async fn rescan_origin(
        &self,
        request: Request<OriginRequest>,
    ) -> Result<Response<Self::RescanOriginStream>, Status> {
        let req = request.into_inner();
        let subdir = req.subdir.as_deref().filter(|s| !s.is_empty());
        info!(
            origin_id = %req.origin_id,
            subdir = ?subdir,
            "gRPC rescan_origin started"
        );
        let (tx, rx) = mpsc::channel(32);
        let (progress_tx, mut progress_rx) = mpsc::channel::<crate::scanner::ScanProgress>(64);
        let origin_id = musicfs_core::OriginId::from(req.origin_id.as_str());
        let scanner = self.scanner.clone();
        let origin_root = self.origin_root.clone();
        let subdir_owned = subdir.map(|s| s.to_string());
        tokio::spawn(async move {
            let forward_handle = {
                let tx = tx.clone();
                tokio::spawn(async move {
                    while let Some(progress) = progress_rx.recv().await {
                        let proto = SyncProgress {
                            phase: progress.phase,
                            current: progress.current,
                            total: progress.total,
                            current_path: progress.current_path,
                            bytes_synced: progress.bytes_synced,
                            new_files: vec![],
                        };
                        if tx.send(Ok(proto)).await.is_err() {
                            break;
                        }
                    }
                })
            };
            let result = scanner
                .scan(
                    &origin_id,
                    &origin_root,
                    subdir_owned.as_deref(),
                    progress_tx,
                )
                .await;
            forward_handle.abort();
            match result {
                Ok(scan_result) => {
                    let synced_files: Vec<SyncedFile> = scan_result
                        .new_files
                        .iter()
                        .map(|f| SyncedFile {
                            path: f.path.clone(),
                            file_id: f.file_id.0,
                            virtual_path: f.virtual_path.clone(),
                        })
                        .collect();
                    let _ = tx
                        .send(Ok(SyncProgress {
                            phase: "complete".to_string(),
                            current: scan_result.new_files.len() as u32
                                + scan_result.changed
                                + scan_result.deleted,
                            total: scan_result.new_files.len() as u32
                                + scan_result.changed
                                + scan_result.deleted
                                + scan_result.unchanged,
                            current_path: String::new(),
                            bytes_synced: scan_result.bytes_synced,
                            new_files: synced_files,
                        }))
                        .await;
                }
                Err(e) => {
                    let _ = tx
                        .send(Err(Status::internal(format!("rescan failed: {}", e))))
                        .await;
                }
            }
        });
        Ok(Response::new(ReceiverStream::new(rx)))
    }
    type SubscribeEventsStream = ReceiverStream<Result<Event, Status>>;
    #[instrument(
        level = "info",
        skip(self, request),
        fields(method = "subscribe_events")
    )]
    async fn subscribe_events(
        &self,
        request: Request<EventFilter>,
    ) -> Result<Response<Self::SubscribeEventsStream>, Status> {
        info!("gRPC subscribe_events: client connected");
        let filter = request.into_inner();
        let mut rx = self.event_bus.subscribe();
        let (tx, out_rx) = mpsc::channel(100);
        tokio::spawn(async move {
            loop {
                match rx.recv().await {
                    Ok(event) => {
                        if Self::matches_filter(&event, &filter) {
                            let proto_event = Self::event_to_proto(&event);
                            if tx.send(Ok(proto_event)).await.is_err() {
                                break;
                            }
                        }
                    }
                    Err(tokio::sync::broadcast::error::RecvError::Lagged(n)) => {
                        tracing::warn!(skipped = n, "Event subscriber lagged, skipped events");
                    }
                    Err(tokio::sync::broadcast::error::RecvError::Closed) => {
                        tracing::debug!("Event channel closed");
                        break;
                    }
                }
            }
        });
        Ok(Response::new(ReceiverStream::new(out_rx)))
    }
 }
 #[cfg(test)]
 mod tests {
    use super::*;
    async fn make_test_server() -> (MusicFsServer, tempfile::TempDir) {
        let event_bus = Arc::new(EventBus::new(16));
        let db = Arc::new(musicfs_cache::Database::open_memory().unwrap());
        let tree = Arc::new(parking_lot::RwLock::new(
            musicfs_cache::TreeBuilder::new().build(),
        ));
        let dir = tempfile::tempdir().unwrap();
        let cfg = musicfs_cas::CasConfig {
            chunks_dir: dir.path().join("chunks"),
            ..Default::default()
        };
        let store = Arc::new(musicfs_cas::CasStore::open(cfg).await.unwrap());
        let fetcher = Arc::new(musicfs_cas::ContentFetcher::new(store));
        let origin_root = std::path::PathBuf::from("/tmp/test-origin");
        (
            MusicFsServer::new(event_bus, db, tree, fetcher, origin_root),
            dir,
        )
    }
    #[tokio::test]
    async fn test_get_status() {
        let (server, _dir) = make_test_server().await;
        let response = server.get_status(Request::new(Empty {})).await.unwrap();
        let status = response.into_inner();
        assert!(!status.version.is_empty());
        assert!(status.uptime_secs < 5);
    }
    #[tokio::test]
    async fn test_get_cache_stats() {
        let (server, _dir) = make_test_server().await;
        let response = server
            .get_cache_stats(Request::new(Empty {}))
            .await
            .unwrap();
        let stats = response.into_inner();
        assert_eq!(stats.hit_ratio, 0.0);
    }
 }
@@ -1,327 +0,0 @@
 use musicfs_core::Event;
 use serde::{Deserialize, Serialize};
 use std::time::Duration;
 use tokio::sync::broadcast;
 use tracing::{debug, error, warn};
 #[derive(Debug, Clone, Serialize)]
 pub struct WebhookPayload {
    pub event_type: String,
    pub timestamp: i64,
    pub data: serde_json::Value,
 }
 #[derive(Clone, Deserialize)]
 pub struct WebhookConfig {
    pub url: String,
    #[serde(skip_serializing)]
    pub secret: Option<String>,
    pub events: Vec<String>,
    #[serde(default = "default_retry_count")]
    pub retry_count: u32,
    #[serde(default = "default_timeout_ms")]
    pub timeout_ms: u64,
 }
 impl std::fmt::Debug for WebhookConfig {
    fn fmt(&self, f: &mut std::fmt::Formatter<'_>) -> std::fmt::Result {
        f.debug_struct("WebhookConfig")
            .field("url", &self.url)
            .field("secret", &self.secret.as_ref().map(|_| "[REDACTED]"))
            .field("events", &self.events)
            .field("retry_count", &self.retry_count)
            .field("timeout_ms", &self.timeout_ms)
            .finish()
    }
 }
 fn default_retry_count() -> u32 {
    3
 }
 fn default_timeout_ms() -> u64 {
    5000
 }
 #[derive(Debug, thiserror::Error)]
 pub enum WebhookError {
    #[error("Failed to initialize HTTP client: {0}")]
    ClientInit(String),
 }
 pub struct WebhookHandler {
    client: reqwest::Client,
    configs: Vec<WebhookConfig>,
 }
 impl WebhookHandler {
    pub fn new(configs: Vec<WebhookConfig>) -> Result<Self, WebhookError> {
        let client = reqwest::Client::builder()
            .timeout(Duration::from_secs(30))
            .build()
            .map_err(|e| {
                error!(error = %e, "Failed to create webhook HTTP client");
                WebhookError::ClientInit(e.to_string())
            })?;
        Ok(Self { client, configs })
    }
    pub async fn run(&self, mut rx: broadcast::Receiver<Event>) {
        loop {
            match rx.recv().await {
                Ok(event) => {
                    for config in &self.configs {
                        if self.matches_filter(&event, config) {
                            self.dispatch(config, &event).await;
                        }
                    }
                }
                Err(broadcast::error::RecvError::Lagged(n)) => {
                    warn!(skipped = n, "Webhook handler lagged, skipped events");
                }
                Err(broadcast::error::RecvError::Closed) => {
                    debug!("Event channel closed, webhook handler stopping");
                    break;
                }
            }
        }
    }
    async fn dispatch(&self, config: &WebhookConfig, event: &Event) {
        let payload = WebhookPayload {
            event_type: self.event_type_name(event),
            timestamp: chrono::Utc::now().timestamp_millis(),
            data: self.event_to_json(event),
        };
        let signature = self.sign(&payload, config);
        let mut attempts = 0u32;
        loop {
            let result = self
                .client
                .post(&config.url)
                .timeout(Duration::from_millis(config.timeout_ms))
                .header("Content-Type", "application/json")
                .header("X-MusicFS-Signature", &signature)
                .header("X-MusicFS-Event", &payload.event_type)
                .json(&payload)
                .send()
                .await;
            match result {
                Ok(resp) if resp.status().is_success() => {
                    debug!(
                        "Webhook delivered to {} for {}",
                        config.url, payload.event_type
                    );
                    break;
                }
                Ok(resp) => {
                    warn!(
                        "Webhook to {} returned status {}, attempt {}/{}",
                        config.url,
                        resp.status(),
                        attempts + 1,
                        config.retry_count + 1
                    );
                }
                Err(e) => {
                    warn!(
                        "Webhook to {} failed: {}, attempt {}/{}",
                        config.url,
                        e,
                        attempts + 1,
                        config.retry_count + 1
                    );
                }
            }
            if attempts >= config.retry_count {
                warn!(
                    "Webhook delivery to {} failed after {} attempts",
                    config.url,
                    attempts + 1
                );
                break;
            }
            attempts += 1;
            let delay = Duration::from_millis(100 * 2u64.pow(attempts));
            tokio::time::sleep(delay).await;
        }
    }
    fn sign(&self, payload: &WebhookPayload, config: &WebhookConfig) -> String {
        match &config.secret {
            Some(secret) => {
                use hmac::{Hmac, Mac};
                use sha2::Sha256;
                type HmacSha256 = Hmac<Sha256>;
                let body = serde_json::to_string(payload).unwrap_or_default();
                let mac = match HmacSha256::new_from_slice(secret.as_bytes()) {
                    Ok(m) => m,
                    Err(e) => {
                        error!(error = %e, "Invalid HMAC key for webhook signature");
                        return String::new();
                    }
                };
                let mut mac = mac;
                mac.update(body.as_bytes());
                let result = mac.finalize();
                format!("sha256={}", hex::encode(result.into_bytes()))
            }
            None => String::new(),
        }
    }
    fn matches_filter(&self, event: &Event, config: &WebhookConfig) -> bool {
        if config.events.is_empty() {
            return true;
        }
        let event_type = self.event_type_name(event);
        config.events.iter().any(|e| e == &event_type)
    }
    fn event_type_name(&self, event: &Event) -> String {
        match event {
            Event::FileAccessed { .. } => "file_accessed",
            Event::FileAdded { .. } => "file_added",
            Event::FileRemoved { .. } => "file_removed",
            Event::FileModified { .. } => "file_modified",
            Event::SyncStarted { .. } => "sync_started",
            Event::SyncCompleted { .. } => "sync_completed",
            Event::OriginHealthChanged { .. } => "origin_health_changed",
            Event::CacheEviction { .. } => "cache_eviction",
            Event::OriginConnected { .. } => "origin_connected",
            Event::OriginDisconnected { .. } => "origin_disconnected",
            Event::AllOriginsUnhealthy { .. } => "all_origins_unhealthy",
        }
        .to_string()
    }
    fn event_to_json(&self, event: &Event) -> serde_json::Value {
        match event {
            Event::FileAccessed {
                file_id,
                origin_id,
                path,
                offset,
                size,
            } => serde_json::json!({
                "file_id": file_id.0,
                "origin_id": origin_id.to_string(),
                "path": path.as_str(),
                "offset": offset,
                "size": size,
            }),
            Event::FileAdded { path, origin_id } => serde_json::json!({
                "path": path.as_str(),
                "origin_id": origin_id.to_string(),
            }),
            Event::FileRemoved { path, file_id } => serde_json::json!({
                "path": path.as_str(),
                "file_id": file_id.map(|id| id.0),
            }),
            Event::FileModified { path } => serde_json::json!({
                "path": path.as_str(),
            }),
            Event::SyncStarted { origin_id } => serde_json::json!({
                "origin_id": origin_id.to_string(),
            }),
            Event::SyncCompleted {
                origin_id,
                files_changed,
            } => serde_json::json!({
                "origin_id": origin_id.to_string(),
                "files_changed": files_changed,
            }),
            Event::OriginHealthChanged { origin_id, healthy } => serde_json::json!({
                "origin_id": origin_id.to_string(),
                "healthy": healthy,
            }),
            Event::CacheEviction { bytes_freed } => serde_json::json!({
                "bytes_freed": bytes_freed,
            }),
            Event::OriginConnected { origin_id } => serde_json::json!({
                "origin_id": origin_id.to_string(),
            }),
            Event::OriginDisconnected { origin_id } => serde_json::json!({
                "origin_id": origin_id.to_string(),
            }),
            Event::AllOriginsUnhealthy { candidate_count } => serde_json::json!({
                "candidate_count": candidate_count,
            }),
        }
    }
 }
 #[cfg(test)]
 mod tests {
    use super::*;
    use musicfs_core::OriginId;
    #[test]
    fn test_webhook_config_defaults() {
        let json = r#"{"url": "http://example.com", "events": []}"#;
        let config: WebhookConfig = serde_json::from_str(json).unwrap();
        assert_eq!(config.retry_count, 3);
        assert_eq!(config.timeout_ms, 5000);
    }
    #[test]
    fn test_event_type_name() {
        let handler = WebhookHandler::new(vec![]).unwrap();
        let event = Event::SyncStarted {
            origin_id: OriginId::from("test"),
        };
        assert_eq!(handler.event_type_name(&event), "sync_started");
    }
    #[test]
    fn test_matches_filter_empty() {
        let handler = WebhookHandler::new(vec![]).unwrap();
        let config = WebhookConfig {
            url: "http://example.com".to_string(),
            secret: None,
            events: vec![],
            retry_count: 3,
            timeout_ms: 5000,
        };
        let event = Event::SyncStarted {
            origin_id: OriginId::from("test"),
        };
        assert!(handler.matches_filter(&event, &config));
    }
    #[test]
    fn test_matches_filter_specific() {
        let handler = WebhookHandler::new(vec![]).unwrap();
        let config = WebhookConfig {
            url: "http://example.com".to_string(),
            secret: None,
            events: vec!["sync_started".to_string()],
            retry_count: 3,
            timeout_ms: 5000,
        };
        let event = Event::SyncStarted {
            origin_id: OriginId::from("test"),
        };
        assert!(handler.matches_filter(&event, &config));
        let event2 = Event::SyncCompleted {
            origin_id: OriginId::from("test"),
            files_changed: 0,
        };
        assert!(!handler.matches_filter(&event2, &config));
    }
 }
@@ -1,11 +0,0 @@
 [package]
 name = "musicfs-metadata"
 version.workspace = true
 edition.workspace = true
 [dependencies]
 musicfs-core = { path = "../musicfs-core" }
 symphonia.workspace = true
 thiserror.workspace = true
 tracing.workspace = true
 image.workspace = true
@@ -1,116 +0,0 @@
 use image::ImageFormat;
 use std::io::Cursor;
 use symphonia::core::meta::Visual;
 use tracing::debug;
 #[derive(Debug, Clone)]
 pub struct Artwork {
    pub art_type: ArtType,
    pub mime_type: String,
    pub width: u32,
    pub height: u32,
    pub data: Vec<u8>,
 }
 #[derive(Debug, Clone, Copy, PartialEq, Eq)]
 pub enum ArtType {
    Front,
    Back,
    Other,
 }
 #[derive(Debug, Clone, Copy)]
 pub enum ArtSize {
    Thumbnail,
    Medium,
    Full,
 }
 impl ArtSize {
    pub fn max_dimension(&self) -> Option<u32> {
        match self {
            ArtSize::Thumbnail => Some(150),
            ArtSize::Medium => Some(300),
            ArtSize::Full => None,
        }
    }
 }
 pub struct ArtworkExtractor;
 impl ArtworkExtractor {
    pub fn extract_from_visual(visual: &Visual) -> Option<Artwork> {
        let data = visual.data.to_vec();
        let img = image::load_from_memory(&data).ok()?;
        let art_type = match visual.usage {
            Some(symphonia::core::meta::StandardVisualKey::FrontCover) => ArtType::Front,
            Some(symphonia::core::meta::StandardVisualKey::BackCover) => ArtType::Back,
            _ => ArtType::Other,
        };
        let mime_type = if visual.media_type.is_empty() {
            "image/jpeg".to_string()
        } else {
            visual.media_type.clone()
        };
        Some(Artwork {
            art_type,
            mime_type,
            width: img.width(),
            height: img.height(),
            data,
        })
    }
    pub fn resize(artwork: &Artwork, size: ArtSize) -> Option<Artwork> {
        let max_dim = size.max_dimension()?;
        if artwork.width <= max_dim && artwork.height <= max_dim {
            return Some(artwork.clone());
        }
        let img = image::load_from_memory(&artwork.data).ok()?;
        let resized = img.thumbnail(max_dim, max_dim);
        let mut output = Vec::new();
        let mut cursor = Cursor::new(&mut output);
        resized.write_to(&mut cursor, ImageFormat::Jpeg).ok()?;
        debug!(
            "Resized artwork from {}x{} to {}x{}",
            artwork.width,
            artwork.height,
            resized.width(),
            resized.height()
        );
        Some(Artwork {
            art_type: artwork.art_type,
            mime_type: "image/jpeg".to_string(),
            width: resized.width(),
            height: resized.height(),
            data: output,
        })
    }
 }
 #[cfg(test)]
 mod tests {
    use super::*;
    #[test]
    fn test_art_size_dimensions() {
        assert_eq!(ArtSize::Thumbnail.max_dimension(), Some(150));
        assert_eq!(ArtSize::Medium.max_dimension(), Some(300));
        assert_eq!(ArtSize::Full.max_dimension(), None);
    }
    #[test]
    fn test_art_type_equality() {
        assert_eq!(ArtType::Front, ArtType::Front);
        assert_ne!(ArtType::Front, ArtType::Back);
    }
 }
@@ -1,5 +0,0 @@
 pub mod artwork;
 mod parser;
 pub use artwork::{ArtSize, ArtType, Artwork, ArtworkExtractor};
 pub use parser::MetadataParser;
@@ -1,209 +0,0 @@
 use musicfs_core::{AudioFormat, AudioMeta, Error, Result};
 use std::fs::File;
 use std::path::Path;
 use symphonia::core::codecs::CODEC_TYPE_NULL;
 use symphonia::core::formats::FormatOptions;
 use symphonia::core::io::MediaSourceStream;
 use symphonia::core::meta::MetadataOptions;
 use symphonia::core::probe::Hint;
 use tracing::debug;
 pub struct MetadataParser;
 impl MetadataParser {
    pub fn new() -> Self {
        Self
    }
    pub fn parse_file(&self, path: &Path) -> Result<AudioMeta> {
        let file = File::open(path)?;
        let mss = MediaSourceStream::new(Box::new(file), Default::default());
        let ext = path.extension().and_then(|e| e.to_str()).unwrap_or("");
        let mut hint = Hint::new();
        if !ext.is_empty() {
            hint.with_extension(ext);
        }
        let fmt_opts = FormatOptions::default();
        let meta_opts = MetadataOptions::default();
        let probed = symphonia::default::get_probe()
            .format(&hint, mss, &fmt_opts, &meta_opts)
            .map_err(|e| Error::Metadata(format!("Failed to probe format: {}", e)))?;
        let mut format = probed.format;
        let mut audio_meta = AudioMeta {
            format: AudioFormat::from_extension(ext),
            ..Default::default()
        };
        if let Some(metadata) = format.metadata().current() {
            self.extract_tags(&mut audio_meta, metadata);
        }
        if let Some(track) = format
            .tracks()
            .iter()
            .find(|t| t.codec_params.codec != CODEC_TYPE_NULL)
        {
            let params = &track.codec_params;
            if let Some(n_frames) = params.n_frames {
                if let Some(sample_rate) = params.sample_rate {
                    audio_meta.duration_ms = Some((n_frames as u64 * 1000) / sample_rate as u64);
                    audio_meta.sample_rate = Some(sample_rate);
                }
            }
            if let Some(channels) = params.channels {
                audio_meta.channels = Some(channels.count() as u32);
            }
            if let Some(bits_per_sample) = params.bits_per_sample {
                audio_meta.bits_per_sample = Some(bits_per_sample);
                if let Some(sample_rate) = params.sample_rate {
                    if let Some(channels) = params.channels {
                        audio_meta.bitrate =
                            Some(bits_per_sample * sample_rate * channels.count() as u32 / 1000);
                    }
                }
            }
        }
        debug!(?audio_meta, "Parsed metadata");
        Ok(audio_meta)
    }
    fn extract_tags(
        &self,
        meta: &mut AudioMeta,
        metadata: &symphonia::core::meta::MetadataRevision,
    ) {
        use symphonia::core::meta::StandardTagKey;
        for tag in metadata.tags() {
            if let Some(std_key) = tag.std_key {
                let value = tag.value.to_string();
                match std_key {
                    // Basic metadata
                    StandardTagKey::TrackTitle => meta.title = Some(value),
                    StandardTagKey::Artist => meta.artist = Some(value),
                    StandardTagKey::Album => meta.album = Some(value),
                    StandardTagKey::AlbumArtist => meta.album_artist = Some(value),
                    StandardTagKey::Genre => meta.genre = Some(value),
                    // Track/disc with totals (parse "X/Y" format)
                    StandardTagKey::TrackNumber => {
                        let parts: Vec<&str> = value.split('/').collect();
                        meta.track = parts.first().and_then(|s| s.trim().parse().ok());
                        if parts.len() > 1 {
                            meta.track_total = parts.get(1).and_then(|s| s.trim().parse().ok());
                        }
                    }
                    StandardTagKey::DiscNumber => {
                        let parts: Vec<&str> = value.split('/').collect();
                        meta.disc = parts.first().and_then(|s| s.trim().parse().ok());
                        if parts.len() > 1 {
                            meta.disc_total = parts.get(1).and_then(|s| s.trim().parse().ok());
                        }
                    }
                    StandardTagKey::TrackTotal => {
                        meta.track_total = value.trim().parse().ok();
                    }
                    StandardTagKey::DiscTotal => {
                        meta.disc_total = value.trim().parse().ok();
                    }
                    // Date handling: store full date string, extract year
                    StandardTagKey::Date | StandardTagKey::ReleaseDate => {
                        meta.date = Some(value.clone());
                        meta.year = value.chars().take(4).collect::<String>().parse().ok();
                    }
                    // Additional metadata
                    StandardTagKey::Composer => meta.composer = Some(value),
                    StandardTagKey::Comment => meta.comment = Some(value),
                    StandardTagKey::Lyrics => meta.lyrics = Some(value),
                    StandardTagKey::Copyright => meta.copyright = Some(value),
                    StandardTagKey::Compilation => {
                        meta.compilation = Some(value == "1" || value.eq_ignore_ascii_case("true"));
                    }
                    StandardTagKey::Encoder => meta.encoder = Some(value),
                    // Sort keys
                    StandardTagKey::SortTrackTitle => meta.title_sort = Some(value),
                    StandardTagKey::SortArtist => meta.artist_sort = Some(value),
                    StandardTagKey::SortAlbum => meta.album_sort = Some(value),
                    StandardTagKey::SortAlbumArtist => meta.album_artist_sort = Some(value),
                    // MusicBrainz IDs
                    StandardTagKey::MusicBrainzRecordingId => meta.mb_recording_id = Some(value),
                    StandardTagKey::MusicBrainzAlbumId => meta.mb_album_id = Some(value),
                    StandardTagKey::MusicBrainzArtistId => meta.mb_artist_id = Some(value),
                    StandardTagKey::MusicBrainzAlbumArtistId => {
                        meta.mb_album_artist_id = Some(value)
                    }
                    StandardTagKey::MusicBrainzReleaseGroupId => {
                        meta.mb_release_group_id = Some(value)
                    }
                    // ReplayGain (parse as f32, values may have "dB" suffix)
                    StandardTagKey::ReplayGainTrackGain => {
                        meta.replaygain_track_gain = parse_replaygain(&value);
                    }
                    StandardTagKey::ReplayGainTrackPeak => {
                        meta.replaygain_track_peak = value.trim().parse().ok();
                    }
                    StandardTagKey::ReplayGainAlbumGain => {
                        meta.replaygain_album_gain = parse_replaygain(&value);
                    }
                    StandardTagKey::ReplayGainAlbumPeak => {
                        meta.replaygain_album_peak = value.trim().parse().ok();
                    }
                    _ => {}
                }
            }
        }
    }
 }
 /// Parse ReplayGain value, stripping optional "dB" suffix
 fn parse_replaygain(value: &str) -> Option<f32> {
    let trimmed = value.trim();
    let without_db = trimmed
        .strip_suffix("dB")
        .or_else(|| trimmed.strip_suffix(" dB"))
        .unwrap_or(trimmed);
    without_db.trim().parse().ok()
 }
 impl Default for MetadataParser {
    fn default() -> Self {
        Self::new()
    }
 }
 #[cfg(test)]
 mod tests {
    use super::*;
    #[test]
    fn test_audio_format_detection() {
        assert_eq!(AudioFormat::from_extension("flac"), AudioFormat::Flac);
        assert_eq!(AudioFormat::from_extension("mp3"), AudioFormat::Mp3);
        assert_eq!(AudioFormat::from_extension("opus"), AudioFormat::Opus);
        assert_eq!(AudioFormat::from_extension("ogg"), AudioFormat::Vorbis);
        assert_eq!(AudioFormat::from_extension("m4a"), AudioFormat::Aac);
        assert_eq!(AudioFormat::from_extension("wav"), AudioFormat::Wav);
    }
    #[test]
    fn test_parser_creation() {
        let parser = MetadataParser::new();
        let default_parser = MetadataParser::default();
        assert!(std::mem::size_of_val(&parser) == std::mem::size_of_val(&default_parser));
    }
 }
@@ -1,23 +0,0 @@
 [package]
 name = "musicfs-origins"
 version.workspace = true
 edition.workspace = true
 [features]
 default = []
 s3 = []
 sftp = []
 [dependencies]
 musicfs-core = { path = "../musicfs-core" }
 async-trait.workspace = true
 dashmap.workspace = true
 futures.workspace = true
 libc.workspace = true
 thiserror.workspace = true
 tokio = { workspace = true, features = ["fs", "sync", "time"] }
 tracing.workspace = true
 parking_lot.workspace = true
 [dev-dependencies]
 tempfile.workspace = true
@@ -1,226 +0,0 @@
 use crate::registry::OriginRegistry;
 use crate::traits::Origin;
 use musicfs_core::{Error, RealPath, Result};
 use std::sync::Arc;
 use std::time::Duration;
 use tracing::{trace, warn};
 #[derive(Debug, Clone)]
 pub struct RetryConfig {
    pub max_attempts: u32,
    pub delays: Vec<Duration>,
 }
 impl Default for RetryConfig {
    fn default() -> Self {
        Self::spec_compliant()
    }
 }
 impl RetryConfig {
    pub fn spec_compliant() -> Self {
        Self {
            max_attempts: 3,
            delays: vec![
                Duration::from_millis(100),
                Duration::from_millis(500),
                Duration::from_millis(2000),
            ],
        }
    }
    pub fn with_delays(delays: Vec<Duration>) -> Self {
        Self {
            max_attempts: delays.len() as u32,
            delays,
        }
    }
    fn delay_for_attempt(&self, attempt: u32) -> Duration {
        self.delays
            .get(attempt as usize)
            .copied()
            .unwrap_or(*self.delays.last().unwrap_or(&Duration::from_millis(100)))
    }
 }
 pub struct FailoverExecutor {
    registry: Arc<OriginRegistry>,
    retry_config: RetryConfig,
 }
 impl FailoverExecutor {
    pub fn new(registry: Arc<OriginRegistry>, retry_config: RetryConfig) -> Self {
        Self {
            registry,
            retry_config,
        }
    }
    pub async fn read_with_failover(
        &self,
        path: &RealPath,
        offset: u64,
        size: u32,
    ) -> Result<Vec<u8>> {
        let origins = self.registry.route_all(path);
        if origins.is_empty() {
            if let Some(origin) = self.registry.route_with_fallback(path) {
                warn!("No healthy origins, using fallback origin {}", origin.id());
                return self
                    .read_with_retry(&origin, &path.path, offset, size)
                    .await;
            }
            return Err(Error::NoOriginAvailable);
        }
        let mut last_error = None;
        for origin in origins {
            trace!(origin_id = %origin.id(), "Attempting read from origin");
            let start = std::time::Instant::now();
            match self
                .read_with_retry(&origin, &path.path, offset, size)
                .await
            {
                Ok(data) => {
                    let latency = start.elapsed().as_millis() as u64;
                    self.registry.record_latency(origin.id(), latency);
                    return Ok(data);
                }
                Err(e) => {
                    warn!(origin_id = %origin.id(), error = %e, "Origin failed, trying next");
                    last_error = Some(e);
                }
            }
        }
        Err(last_error.unwrap_or(Error::NoOriginAvailable))
    }
    async fn read_with_retry(
        &self,
        origin: &Arc<dyn Origin>,
        path: &std::path::Path,
        offset: u64,
        size: u32,
    ) -> Result<Vec<u8>> {
        for attempt in 0..self.retry_config.max_attempts {
            match origin.read(path, offset, size).await {
                Ok(data) => return Ok(data),
                Err(e) if attempt + 1 < self.retry_config.max_attempts => {
                    let delay = self.retry_config.delay_for_attempt(attempt);
                    warn!(
                        origin_id = %origin.id(),
                        attempt = attempt + 1,
                        max_attempts = self.retry_config.max_attempts,
                        error = %e,
                        delay_ms = delay.as_millis() as u64,
                        "Retrying read operation"
                    );
                    tokio::time::sleep(delay).await;
                }
                Err(e) => return Err(e),
            }
        }
        Err(Error::MaxRetriesExceeded)
    }
    pub async fn read_full_with_failover(&self, path: &RealPath) -> Result<Vec<u8>> {
        let origins = self.registry.route_all(path);
        if origins.is_empty() {
            if let Some(origin) = self.registry.route_with_fallback(path) {
                warn!(
                    "No healthy origins for full read, using fallback {}",
                    origin.id()
                );
                return self.read_full_with_retry(&origin, &path.path).await;
            }
            return Err(Error::NoOriginAvailable);
        }
        let mut last_error = None;
        for origin in origins {
            trace!(origin_id = %origin.id(), "Attempting full read from origin");
            let start = std::time::Instant::now();
            match self.read_full_with_retry(&origin, &path.path).await {
                Ok(data) => {
                    let latency = start.elapsed().as_millis() as u64;
                    self.registry.record_latency(origin.id(), latency);
                    return Ok(data);
                }
                Err(e) => {
                    warn!(origin_id = %origin.id(), error = %e, "Origin failed full read, trying next");
                    last_error = Some(e);
                }
            }
        }
        Err(last_error.unwrap_or(Error::NoOriginAvailable))
    }
    async fn read_full_with_retry(
        &self,
        origin: &Arc<dyn Origin>,
        path: &std::path::Path,
    ) -> Result<Vec<u8>> {
        for attempt in 0..self.retry_config.max_attempts {
            match origin.read_full(path).await {
                Ok(data) => return Ok(data),
                Err(e) if attempt + 1 < self.retry_config.max_attempts => {
                    let delay = self.retry_config.delay_for_attempt(attempt);
                    warn!(
                        origin_id = %origin.id(),
                        attempt = attempt + 1,
                        max_attempts = self.retry_config.max_attempts,
                        error = %e,
                        delay_ms = delay.as_millis() as u64,
                        "Retrying full read operation"
                    );
                    tokio::time::sleep(delay).await;
                }
                Err(e) => return Err(e),
            }
        }
        Err(Error::MaxRetriesExceeded)
    }
 }
 #[cfg(test)]
 mod tests {
    use super::*;
    #[test]
    fn test_retry_config_default() {
        let config = RetryConfig::default();
        assert_eq!(config.max_attempts, 3);
        assert_eq!(config.delays[0], Duration::from_millis(100));
        assert_eq!(config.delays[1], Duration::from_millis(500));
        assert_eq!(config.delays[2], Duration::from_millis(2000));
    }
    #[test]
    fn test_delay_for_attempt() {
        let config = RetryConfig::spec_compliant();
        assert_eq!(config.delay_for_attempt(0), Duration::from_millis(100));
        assert_eq!(config.delay_for_attempt(1), Duration::from_millis(500));
        assert_eq!(config.delay_for_attempt(2), Duration::from_millis(2000));
        assert_eq!(config.delay_for_attempt(10), Duration::from_millis(2000));
    }
    #[test]
    fn test_custom_delays() {
        let config =
            RetryConfig::with_delays(vec![Duration::from_millis(50), Duration::from_millis(100)]);
        assert_eq!(config.max_attempts, 2);
        assert_eq!(config.delay_for_attempt(0), Duration::from_millis(50));
        assert_eq!(config.delay_for_attempt(1), Duration::from_millis(100));
    }
 }
@@ -1,400 +0,0 @@
 use crate::traits::Origin;
 use dashmap::DashMap;
 use futures::future::join_all;
 use musicfs_core::{Event, EventBus, HealthStatus, OriginId, OriginType};
 use std::collections::HashMap;
 use std::sync::Arc;
 use std::time::{Duration, Instant};
 use tokio::sync::mpsc;
 use tracing::{debug, info, info_span, warn, Instrument};
 pub struct HealthMonitor {
    origins: DashMap<OriginId, Arc<dyn Origin>>,
    state: DashMap<OriginId, OriginHealthState>,
    check_interval: Duration,
    default_threshold: u32,
    per_type_thresholds: HashMap<OriginType, u32>,
    event_bus: Option<Arc<EventBus>>,
 }
 #[derive(Debug, Clone)]
 pub struct OriginHealthState {
    pub status: HealthStatus,
    pub last_check: Instant,
    pub consecutive_failures: u32,
    pub last_latency_ms: Option<u64>,
 }
 impl Default for OriginHealthState {
    fn default() -> Self {
        Self {
            status: HealthStatus::Unknown,
            last_check: Instant::now(),
            consecutive_failures: 0,
            last_latency_ms: None,
        }
    }
 }
 #[derive(Debug, Clone)]
 pub struct HealthSnapshot {
    pub healthy: Vec<OriginId>,
    pub degraded: Vec<OriginId>,
    pub unhealthy: Vec<OriginId>,
    pub failure_counts: HashMap<OriginId, u32>,
 }
 impl HealthSnapshot {
    pub fn is_healthy(&self, id: &OriginId) -> bool {
        self.healthy.contains(id)
    }
    pub fn is_degraded(&self, id: &OriginId) -> bool {
        self.degraded.contains(id)
    }
    pub fn is_unhealthy(&self, id: &OriginId) -> bool {
        self.unhealthy.contains(id)
    }
    pub fn failure_count(&self, id: &OriginId) -> Option<u32> {
        self.failure_counts.get(id).copied()
    }
    pub fn all_unhealthy(&self) -> bool {
        self.healthy.is_empty() && self.degraded.is_empty()
    }
    pub fn total_candidates(&self) -> usize {
        self.healthy.len() + self.degraded.len() + self.unhealthy.len()
    }
 }
 impl HealthMonitor {
    pub fn new(check_interval: Duration) -> Self {
        let mut per_type = HashMap::new();
        per_type.insert(OriginType::Local, 1);
        per_type.insert(OriginType::Nfs, 3);
        per_type.insert(OriginType::Smb, 3);
        per_type.insert(OriginType::S3, 3);
        per_type.insert(OriginType::Sftp, 3);
        Self {
            origins: DashMap::new(),
            state: DashMap::new(),
            check_interval,
            default_threshold: 3,
            per_type_thresholds: per_type,
            event_bus: None,
        }
    }
    pub fn with_threshold(mut self, threshold: u32) -> Self {
        self.default_threshold = threshold;
        self
    }
    pub fn with_per_type_thresholds(mut self, thresholds: HashMap<OriginType, u32>) -> Self {
        self.per_type_thresholds = thresholds;
        self
    }
    pub fn with_event_bus(mut self, bus: Arc<EventBus>) -> Self {
        self.event_bus = Some(bus);
        self
    }
    fn threshold_for(&self, origin_type: OriginType) -> u32 {
        self.per_type_thresholds
            .get(&origin_type)
            .copied()
            .unwrap_or(self.default_threshold)
    }
    pub fn add_origin(&self, origin: Arc<dyn Origin>) {
        let id = origin.id().clone();
        self.origins.insert(id.clone(), origin);
        self.state.insert(id, OriginHealthState::default());
    }
    pub fn remove_origin(&self, id: &OriginId) {
        self.origins.remove(id);
        self.state.remove(id);
    }
    pub fn snapshot(&self) -> HealthSnapshot {
        let mut healthy = Vec::new();
        let mut degraded = Vec::new();
        let mut unhealthy = Vec::new();
        let mut failure_counts = HashMap::new();
        for entry in self.state.iter() {
            let id = entry.key().clone();
            failure_counts.insert(id.clone(), entry.value().consecutive_failures);
            match entry.value().status {
                HealthStatus::Healthy => healthy.push(id),
                HealthStatus::Degraded => degraded.push(id),
                HealthStatus::Unhealthy => unhealthy.push(id),
                HealthStatus::Unknown => degraded.push(id),
            }
        }
        HealthSnapshot {
            healthy,
            degraded,
            unhealthy,
            failure_counts,
        }
    }
    pub fn start(self: Arc<Self>) -> HealthCheckHandle {
        let (stop_tx, mut stop_rx) = mpsc::channel::<()>(1);
        let monitor = self.clone();
        let interval_secs = monitor.check_interval.as_secs();
        info!(
            interval_secs = interval_secs,
            origin_count = monitor.origins.len(),
            "Health monitor starting"
        );
        tokio::spawn(
            async move {
                let mut interval = tokio::time::interval(monitor.check_interval);
                loop {
                    tokio::select! {
                        _ = interval.tick() => {
                            monitor.check_all().await;
                        }
                        _ = stop_rx.recv() => {
                            info!("Health monitor stopping");
                            break;
                        }
                    }
                }
            }
            .instrument(info_span!("health_monitor")),
        );
        HealthCheckHandle { stop_tx }
    }
    pub async fn check_all(&self) {
        let origins: Vec<_> = self
            .origins
            .iter()
            .map(|e| (e.key().clone(), e.value().clone()))
            .collect();
        let checks: Vec<_> = origins
            .iter()
            .map(|(id, origin)| self.check_one(id, origin))
            .collect();
        join_all(checks).await;
    }
    async fn check_one(&self, id: &OriginId, origin: &Arc<dyn Origin>) {
        let start = Instant::now();
        let health_timeout = Duration::from_millis(1500);
        let status = match tokio::time::timeout(health_timeout, origin.health()).await {
            Ok(status) => status,
            Err(_) => {
                warn!(
                    origin_id = %id,
                    timeout_ms = health_timeout.as_millis() as u64,
                    "Health check timed out"
                );
                HealthStatus::Unhealthy
            }
        };
        let latency_ms = start.elapsed().as_millis() as u64;
        let threshold = self.threshold_for(origin.origin_type());
        let prev_healthy = self
            .state
            .get(id)
            .map(|s| s.status == HealthStatus::Healthy)
            .unwrap_or(false);
        let mut state = self.state.entry(id.clone()).or_default();
        match status {
            HealthStatus::Healthy => {
                if state.status != HealthStatus::Healthy {
                    info!(
                        origin_id = %id,
                        previous_status = ?state.status,
                        duration_ms = latency_ms,
                        "Origin health state transition to healthy"
                    );
                }
                state.status = HealthStatus::Healthy;
                state.consecutive_failures = 0;
            }
            HealthStatus::Degraded => {
                if state.status != HealthStatus::Degraded {
                    info!(
                        origin_id = %id,
                        previous_status = ?state.status,
                        duration_ms = latency_ms,
                        "Origin health state transition to degraded"
                    );
                }
                state.status = HealthStatus::Degraded;
            }
            HealthStatus::Unhealthy => {
                state.consecutive_failures += 1;
                if state.consecutive_failures >= threshold {
                    if state.status != HealthStatus::Unhealthy {
                        info!(
                            origin_id = %id,
                            previous_status = ?state.status,
                            consecutive_failures = state.consecutive_failures,
                            threshold = threshold,
                            duration_ms = latency_ms,
                            "Origin health state transition to unhealthy"
                        );
                    }
                    state.status = HealthStatus::Unhealthy;
                } else {
                    debug!(
                        origin_id = %id,
                        consecutive_failures = state.consecutive_failures,
                        threshold = threshold,
                        "Origin health check failed"
                    );
                    state.status = HealthStatus::Degraded;
                }
            }
            HealthStatus::Unknown => {
                state.status = HealthStatus::Unknown;
            }
        }
        state.last_check = Instant::now();
        state.last_latency_ms = Some(latency_ms);
        let now_healthy = state.status == HealthStatus::Healthy;
        if prev_healthy != now_healthy {
            if let Some(bus) = &self.event_bus {
                bus.publish(Event::OriginHealthChanged {
                    origin_id: id.clone(),
                    healthy: now_healthy,
                });
            }
        }
    }
    pub async fn check_now(&self, id: &OriginId) {
        if let Some(origin) = self.origins.get(id) {
            self.check_one(id, &origin.clone()).await;
        }
    }
    pub fn get_state(&self, id: &OriginId) -> Option<OriginHealthState> {
        self.state.get(id).map(|e| e.value().clone())
    }
 }
 pub struct HealthCheckHandle {
    stop_tx: mpsc::Sender<()>,
 }
 impl HealthCheckHandle {
    pub async fn stop(self) {
        let _ = self.stop_tx.send(()).await;
    }
 }
 #[cfg(test)]
 mod tests {
    use super::*;
    use crate::LocalOrigin;
    use tempfile::TempDir;
    #[tokio::test]
    async fn test_health_monitor_basic() {
        let monitor = HealthMonitor::new(Duration::from_secs(30));
        let dir = TempDir::new().unwrap();
        let origin = Arc::new(LocalOrigin::new("test", dir.path()));
        monitor.add_origin(origin);
        let snapshot = monitor.snapshot();
        assert!(!snapshot.is_healthy(&OriginId::from("test")));
    }
    #[tokio::test]
    async fn test_health_check() {
        let monitor = Arc::new(HealthMonitor::new(Duration::from_secs(30)));
        let dir = TempDir::new().unwrap();
        let origin = Arc::new(LocalOrigin::new("test", dir.path()));
        monitor.add_origin(origin);
        monitor.check_now(&OriginId::from("test")).await;
        let snapshot = monitor.snapshot();
        assert!(snapshot.is_healthy(&OriginId::from("test")));
    }
    #[tokio::test]
    async fn test_failure_tracking() {
        let mut thresholds = HashMap::new();
        thresholds.insert(OriginType::Local, 3);
        let monitor =
            HealthMonitor::new(Duration::from_secs(30)).with_per_type_thresholds(thresholds);
        let origin = Arc::new(LocalOrigin::new(
            "missing",
            std::path::Path::new("/nonexistent"),
        ));
        monitor.add_origin(origin);
        monitor.check_now(&OriginId::from("missing")).await;
        let state = monitor.get_state(&OriginId::from("missing")).unwrap();
        assert_eq!(state.consecutive_failures, 1);
        assert_eq!(state.status, HealthStatus::Degraded);
        monitor.check_now(&OriginId::from("missing")).await;
        monitor.check_now(&OriginId::from("missing")).await;
        let state = monitor.get_state(&OriginId::from("missing")).unwrap();
        assert_eq!(state.consecutive_failures, 3);
        assert_eq!(state.status, HealthStatus::Unhealthy);
    }
    #[tokio::test]
    async fn test_local_origin_threshold_is_one() {
        let monitor = HealthMonitor::new(Duration::from_secs(30));
        let origin = Arc::new(LocalOrigin::new(
            "missing",
            std::path::Path::new("/nonexistent"),
        ));
        monitor.add_origin(origin);
        monitor.check_now(&OriginId::from("missing")).await;
        let state = monitor.get_state(&OriginId::from("missing")).unwrap();
        assert_eq!(state.consecutive_failures, 1);
        assert_eq!(state.status, HealthStatus::Unhealthy);
    }
    #[test]
    fn test_snapshot_all_unhealthy() {
        let snapshot = HealthSnapshot {
            healthy: Vec::new(),
            degraded: Vec::new(),
            unhealthy: vec![OriginId::from("a")],
            failure_counts: HashMap::new(),
        };
        assert!(snapshot.all_unhealthy());
    }
 }
@@ -1,20 +0,0 @@
 mod failover;
 mod health;
 mod local;
 mod nfs;
 mod registry;
 mod router;
 mod s3;
 mod sftp;
 mod smb;
 mod traits;
 pub use failover::{FailoverExecutor, RetryConfig};
 pub use health::{HealthCheckHandle, HealthMonitor, HealthSnapshot, OriginHealthState};
 pub use local::LocalOrigin;
 pub use musicfs_core::OriginType;
 pub use nfs::NfsOrigin;
 pub use registry::OriginRegistry;
 pub use router::{LatencyStats, Router};
 pub use smb::SmbOrigin;
 pub use traits::{Origin, WatchCallback, WatchEvent, WatchHandle};
@@ -1,218 +0,0 @@
 use crate::traits::{Origin, WatchCallback, WatchHandle};
 use async_trait::async_trait;
 use musicfs_core::{DirEntry, FileStat, HealthStatus, OriginId, OriginType, Result};
 use std::path::{Path, PathBuf};
 use tokio::fs;
 use tokio::io::AsyncRead;
 use tracing::debug;
 pub struct LocalOrigin {
    id: OriginId,
    root: PathBuf,
    display_name: String,
 }
 impl LocalOrigin {
    pub fn new(id: impl Into<OriginId>, root: impl Into<PathBuf>) -> Self {
        let root = root.into();
        let display_name = format!("Local: {}", root.display());
        Self {
            id: id.into(),
            root,
            display_name,
        }
    }
    fn full_path(&self, path: &Path) -> PathBuf {
        if path.as_os_str().is_empty() || path == Path::new("/") {
            self.root.clone()
        } else {
            self.root.join(path.strip_prefix("/").unwrap_or(path))
        }
    }
 }
 #[async_trait]
 impl Origin for LocalOrigin {
    fn id(&self) -> &OriginId {
        &self.id
    }
    fn origin_type(&self) -> OriginType {
        OriginType::Local
    }
    fn display_name(&self) -> &str {
        &self.display_name
    }
    async fn readdir(&self, path: &Path) -> Result<Vec<DirEntry>> {
        let full_path = self.full_path(path);
        debug!("LocalOrigin::readdir({:?})", full_path);
        let mut entries = Vec::new();
        let mut dir = fs::read_dir(&full_path).await?;
        while let Some(entry) = dir.next_entry().await? {
            let metadata = entry.metadata().await?;
            let name = entry.file_name().to_string_lossy().into_owned();
            entries.push(DirEntry {
                name,
                is_dir: metadata.is_dir(),
                size: metadata.len(),
                mtime: metadata.modified().unwrap_or(std::time::UNIX_EPOCH),
            });
        }
        Ok(entries)
    }
    async fn stat(&self, path: &Path) -> Result<FileStat> {
        let full_path = self.full_path(path);
        debug!("LocalOrigin::stat({:?})", full_path);
        let metadata = fs::metadata(&full_path).await?;
        Ok(FileStat {
            size: metadata.len(),
            mtime: metadata.modified().unwrap_or(std::time::UNIX_EPOCH),
            is_dir: metadata.is_dir(),
        })
    }
    async fn read(&self, path: &Path, offset: u64, size: u32) -> Result<Vec<u8>> {
        use tokio::io::{AsyncReadExt, AsyncSeekExt};
        let full_path = self.full_path(path);
        debug!(
            "LocalOrigin::read({:?}, offset={}, size={})",
            full_path, offset, size
        );
        let mut file = fs::File::open(&full_path).await?;
        file.seek(std::io::SeekFrom::Start(offset)).await?;
        // FIX: Loop until all requested bytes are read or EOF
        // Single read() only returns kernel buffer (~2MB), not full request
        let mut buffer = Vec::with_capacity(size as usize);
        let mut temp_buf = vec![0u8; 64 * 1024]; // 64KB chunks
        let mut total_read = 0usize;
        while total_read < size as usize {
            let to_read = std::cmp::min(temp_buf.len(), size as usize - total_read);
            let n = file.read(&mut temp_buf[..to_read]).await?;
            if n == 0 {
                break; // EOF
            }
            buffer.extend_from_slice(&temp_buf[..n]);
            total_read += n;
        }
        Ok(buffer)
    }
    async fn read_full(&self, path: &Path) -> Result<Vec<u8>> {
        let full_path = self.full_path(path);
        debug!("LocalOrigin::read_full({:?})", full_path);
        Ok(fs::read(&full_path).await?)
    }
    async fn exists(&self, path: &Path) -> Result<bool> {
        let full_path = self.full_path(path);
        Ok(fs::try_exists(&full_path).await?)
    }
    async fn health(&self) -> HealthStatus {
        match fs::try_exists(&self.root).await {
            Ok(true) => HealthStatus::Healthy,
            Ok(false) => HealthStatus::Unhealthy,
            Err(_) => HealthStatus::Unhealthy,
        }
    }
    async fn open_read(&self, path: &Path) -> Result<Box<dyn AsyncRead + Send + Unpin>> {
        let full_path = self.full_path(path);
        let file = fs::File::open(&full_path).await?;
        Ok(Box::new(file))
    }
    async fn watch(&self, path: &Path, _callback: WatchCallback) -> Result<WatchHandle> {
        debug!("LocalOrigin::watch({:?}) - stub implementation", path);
        let (tx, _rx) = tokio::sync::oneshot::channel();
        Ok(WatchHandle::new(tx))
    }
 }
 #[cfg(test)]
 mod tests {
    use super::*;
    use tempfile::TempDir;
    #[tokio::test]
    async fn test_local_origin_readdir() {
        let dir = TempDir::new().unwrap();
        std::fs::write(dir.path().join("test.txt"), "hello").unwrap();
        std::fs::create_dir(dir.path().join("subdir")).unwrap();
        let origin = LocalOrigin::new("test", dir.path());
        let entries = origin.readdir(Path::new("/")).await.unwrap();
        assert_eq!(entries.len(), 2);
        assert!(entries.iter().any(|e| e.name == "test.txt" && !e.is_dir));
        assert!(entries.iter().any(|e| e.name == "subdir" && e.is_dir));
    }
    #[tokio::test]
    async fn test_local_origin_stat() {
        let dir = TempDir::new().unwrap();
        std::fs::write(dir.path().join("test.txt"), "hello world").unwrap();
        let origin = LocalOrigin::new("test", dir.path());
        let stat = origin.stat(Path::new("/test.txt")).await.unwrap();
        assert_eq!(stat.size, 11);
        assert!(!stat.is_dir);
    }
    #[tokio::test]
    async fn test_local_origin_read() {
        let dir = TempDir::new().unwrap();
        std::fs::write(dir.path().join("test.txt"), "hello world").unwrap();
        let origin = LocalOrigin::new("test", dir.path());
        let data = origin.read(Path::new("/test.txt"), 0, 5).await.unwrap();
        assert_eq!(data, b"hello");
    }
    #[tokio::test]
    async fn test_local_origin_read_offset() {
        let dir = TempDir::new().unwrap();
        std::fs::write(dir.path().join("test.txt"), "hello world").unwrap();
        let origin = LocalOrigin::new("test", dir.path());
        let data = origin.read(Path::new("/test.txt"), 6, 5).await.unwrap();
        assert_eq!(data, b"world");
    }
    #[tokio::test]
    async fn test_local_origin_exists() {
        let dir = TempDir::new().unwrap();
        std::fs::write(dir.path().join("test.txt"), "hello").unwrap();
        let origin = LocalOrigin::new("test", dir.path());
        assert!(origin.exists(Path::new("/test.txt")).await.unwrap());
        assert!(!origin.exists(Path::new("/nonexistent.txt")).await.unwrap());
    }
    #[tokio::test]
    async fn test_local_origin_health() {
        let dir = TempDir::new().unwrap();
        let origin = LocalOrigin::new("test", dir.path());
        assert_eq!(origin.health().await, HealthStatus::Healthy);
    }
 }
@@ -1,162 +0,0 @@
 use crate::local::LocalOrigin;
 use crate::traits::{Origin, WatchCallback, WatchHandle};
 use async_trait::async_trait;
 use musicfs_core::{DirEntry, FileStat, HealthStatus, OriginId, OriginType, Result};
 use std::path::{Path, PathBuf};
 use std::time::Duration;
 use tokio::time::sleep;
 use tracing::{debug, warn};
 pub struct NfsOrigin {
    inner: LocalOrigin,
    max_retries: u32,
    display_name: String,
 }
 impl NfsOrigin {
    pub fn new(id: impl Into<OriginId>, mount_point: impl Into<PathBuf>) -> Self {
        let mount_point = mount_point.into();
        let display_name = format!("NFS: {}", mount_point.display());
        Self {
            inner: LocalOrigin::new(id, &mount_point),
            max_retries: 3,
            display_name,
        }
    }
    pub fn with_max_retries(mut self, retries: u32) -> Self {
        self.max_retries = retries;
        self
    }
    async fn retry_on_stale<T, F, Fut>(&self, op: F) -> Result<T>
    where
        F: Fn() -> Fut,
        Fut: std::future::Future<Output = Result<T>>,
    {
        let mut delay = Duration::from_millis(100);
        for attempt in 0..self.max_retries {
            match op().await {
                Ok(result) => return Ok(result),
                Err(e) => {
                    if let Some(io_err) = e.downcast_io() {
                        #[cfg(unix)]
                        if io_err.raw_os_error() == Some(libc::ESTALE) {
                            warn!(
                                "NFS stale handle (attempt {}/{}), retrying after {:?}",
                                attempt + 1,
                                self.max_retries,
                                delay
                            );
                            sleep(delay).await;
                            delay *= 2;
                            continue;
                        }
                    }
                    return Err(e);
                }
            }
        }
        Err(musicfs_core::Error::NfsStaleHandle)
    }
 }
 #[async_trait]
 impl Origin for NfsOrigin {
    fn id(&self) -> &OriginId {
        self.inner.id()
    }
    fn origin_type(&self) -> OriginType {
        OriginType::Nfs
    }
    fn display_name(&self) -> &str {
        &self.display_name
    }
    async fn readdir(&self, path: &Path) -> Result<Vec<DirEntry>> {
        self.retry_on_stale(|| self.inner.readdir(path)).await
    }
    async fn stat(&self, path: &Path) -> Result<FileStat> {
        self.retry_on_stale(|| self.inner.stat(path)).await
    }
    async fn read(&self, path: &Path, offset: u64, size: u32) -> Result<Vec<u8>> {
        self.retry_on_stale(|| self.inner.read(path, offset, size))
            .await
    }
    async fn read_full(&self, path: &Path) -> Result<Vec<u8>> {
        self.retry_on_stale(|| self.inner.read_full(path)).await
    }
    async fn exists(&self, path: &Path) -> Result<bool> {
        self.retry_on_stale(|| self.inner.exists(path)).await
    }
    async fn health(&self) -> HealthStatus {
        let health_timeout = Duration::from_secs(5);
        match tokio::time::timeout(health_timeout, self.inner.stat(Path::new("/"))).await {
            Ok(Ok(_)) => HealthStatus::Healthy,
            Ok(Err(_)) | Err(_) => HealthStatus::Unhealthy,
        }
    }
    async fn open_read(&self, path: &Path) -> Result<Box<dyn tokio::io::AsyncRead + Send + Unpin>> {
        self.inner.open_read(path).await
    }
    async fn watch(&self, path: &Path, callback: WatchCallback) -> Result<WatchHandle> {
        debug!("NFS watch - inotify may be unreliable over NFS, consider polling");
        self.inner.watch(path, callback).await
    }
 }
 #[cfg(test)]
 mod tests {
    use super::*;
    use tempfile::TempDir;
    #[tokio::test]
    async fn test_nfs_origin_basic() {
        let dir = TempDir::new().unwrap();
        std::fs::write(dir.path().join("test.flac"), b"audio").unwrap();
        let origin = NfsOrigin::new("nfs-test", dir.path());
        let entries = origin.readdir(Path::new("/")).await.unwrap();
        assert_eq!(entries.len(), 1);
        let data = origin.read(Path::new("/test.flac"), 0, 5).await.unwrap();
        assert_eq!(&data, b"audio");
    }
    #[tokio::test]
    async fn test_nfs_origin_health() {
        let dir = TempDir::new().unwrap();
        let origin = NfsOrigin::new("nfs-test", dir.path());
        assert_eq!(origin.health().await, HealthStatus::Healthy);
    }
    #[tokio::test]
    async fn test_nfs_origin_type() {
        let dir = TempDir::new().unwrap();
        let origin = NfsOrigin::new("nfs-test", dir.path());
        assert_eq!(origin.origin_type(), OriginType::Nfs);
    }
    #[test]
    fn test_retry_uses_fn_not_fnmut() {
        fn assert_fn<F: Fn() -> Fut, Fut>(_: F) {}
        let closure = || async { Ok::<_, musicfs_core::Error>(()) };
        assert_fn(closure);
    }
 }
@@ -1,215 +0,0 @@
 use crate::health::{HealthMonitor, HealthSnapshot};
 use crate::router::Router;
 use crate::traits::{Origin, WatchHandle};
 use musicfs_core::{OriginId, RealPath};
 use parking_lot::RwLock;
 use std::collections::HashMap;
 use std::sync::Arc;
 use tracing::{info, warn};
 pub struct OriginRegistry {
    origins: RwLock<HashMap<OriginId, Arc<dyn Origin>>>,
    router: Router,
    health_monitor: Arc<HealthMonitor>,
    watch_handles: RwLock<HashMap<OriginId, Vec<WatchHandle>>>,
 }
 impl OriginRegistry {
    pub fn new(health_monitor: Arc<HealthMonitor>) -> Self {
        Self {
            origins: RwLock::new(HashMap::new()),
            router: Router::new(),
            health_monitor,
            watch_handles: RwLock::new(HashMap::new()),
        }
    }
    pub fn register(&self, origin: Arc<dyn Origin>, priority: u8) {
        let id = origin.id().clone();
        info!("Registering origin {} with priority {}", id, priority);
        self.router.set_priority(id.clone(), priority);
        self.health_monitor.add_origin(origin.clone());
        self.origins.write().insert(id, origin);
    }
    pub fn unregister(&self, id: &OriginId) {
        info!("Unregistering origin {}", id);
        if let Some(handles) = self.watch_handles.write().remove(id) {
            info!("Dropping {} watch handles for origin {}", handles.len(), id);
        }
        self.origins.write().remove(id);
        self.router.remove_priority(id);
        self.health_monitor.remove_origin(id);
    }
    pub fn register_watch(&self, origin_id: &OriginId, handle: WatchHandle) {
        self.watch_handles
            .write()
            .entry(origin_id.clone())
            .or_default()
            .push(handle);
    }
    pub fn get(&self, id: &OriginId) -> Option<Arc<dyn Origin>> {
        self.origins.read().get(id).cloned()
    }
    pub fn list(&self) -> Vec<Arc<dyn Origin>> {
        self.origins.read().values().cloned().collect()
    }
    pub fn route(&self, path: &RealPath) -> Option<Arc<dyn Origin>> {
        let origins = self.origins.read();
        let health = self.health_monitor.snapshot();
        let candidates: Vec<_> = origins
            .iter()
            .filter(|(id, _)| self.can_serve(id, path))
            .map(|(id, origin)| (id.clone(), origin.clone()))
            .collect();
        if candidates.is_empty() {
            warn!("No origin can serve path: {:?}", path);
            return None;
        }
        let candidate_ids: Vec<_> = candidates.iter().map(|(id, _)| id.clone()).collect();
        let selected = self.router.select(&candidate_ids, &health)?;
        candidates
            .into_iter()
            .find(|(id, _)| id == &selected)
            .map(|(_, origin)| origin)
    }
    pub fn route_with_fallback(&self, path: &RealPath) -> Option<Arc<dyn Origin>> {
        let origins = self.origins.read();
        let health = self.health_monitor.snapshot();
        let candidates: Vec<_> = origins
            .iter()
            .filter(|(id, _)| self.can_serve(id, path))
            .map(|(id, origin)| (id.clone(), origin.clone()))
            .collect();
        if candidates.is_empty() {
            return None;
        }
        let candidate_ids: Vec<_> = candidates.iter().map(|(id, _)| id.clone()).collect();
        let selected = self.router.select_with_fallback(&candidate_ids, &health)?;
        candidates
            .into_iter()
            .find(|(id, _)| id == &selected)
            .map(|(_, origin)| origin)
    }
    pub fn route_all(&self, path: &RealPath) -> Vec<Arc<dyn Origin>> {
        let origins = self.origins.read();
        let health = self.health_monitor.snapshot();
        let mut result: Vec<_> = origins
            .iter()
            .filter(|(id, _)| self.can_serve(id, path) && health.is_healthy(id))
            .map(|(_, origin)| origin.clone())
            .collect();
        result.sort_by_key(|o| self.router.get_priority(o.id()));
        result
    }
    fn can_serve(&self, origin_id: &OriginId, path: &RealPath) -> bool {
        path.origin_id == *origin_id
    }
    pub fn health(&self) -> HealthSnapshot {
        self.health_monitor.snapshot()
    }
    pub fn record_latency(&self, id: &OriginId, latency_ms: u64) {
        self.router.record_latency(id, latency_ms);
    }
 }
 #[cfg(test)]
 mod tests {
    use super::*;
    use crate::LocalOrigin;
    use std::path::PathBuf;
    use std::time::Duration;
    use tempfile::TempDir;
    #[test]
    fn test_register_and_get() {
        let monitor = Arc::new(HealthMonitor::new(Duration::from_secs(30)));
        let registry = OriginRegistry::new(monitor);
        let dir = TempDir::new().unwrap();
        let origin = Arc::new(LocalOrigin::new("test", dir.path()));
        registry.register(origin.clone(), 1);
        let retrieved = registry.get(&OriginId::from("test"));
        assert!(retrieved.is_some());
    }
    #[test]
    fn test_unregister() {
        let monitor = Arc::new(HealthMonitor::new(Duration::from_secs(30)));
        let registry = OriginRegistry::new(monitor);
        let dir = TempDir::new().unwrap();
        let origin = Arc::new(LocalOrigin::new("test", dir.path()));
        registry.register(origin, 1);
        registry.unregister(&OriginId::from("test"));
        assert!(registry.get(&OriginId::from("test")).is_none());
    }
    #[tokio::test]
    async fn test_route_by_priority() {
        let monitor = Arc::new(HealthMonitor::new(Duration::from_secs(30)));
        let registry = OriginRegistry::new(monitor.clone());
        let dir1 = TempDir::new().unwrap();
        let dir2 = TempDir::new().unwrap();
        let origin1 = Arc::new(LocalOrigin::new("primary", dir1.path()));
        let origin2 = Arc::new(LocalOrigin::new("backup", dir2.path()));
        registry.register(origin1, 1);
        registry.register(origin2, 2);
        monitor.check_now(&OriginId::from("primary")).await;
        monitor.check_now(&OriginId::from("backup")).await;
        let path = RealPath {
            origin_id: OriginId::from("primary"),
            path: PathBuf::from("/test.flac"),
        };
        let routed = registry.route(&path);
        assert!(routed.is_some());
        assert_eq!(routed.unwrap().id(), &OriginId::from("primary"));
    }
    #[test]
    fn test_list_origins() {
        let monitor = Arc::new(HealthMonitor::new(Duration::from_secs(30)));
        let registry = OriginRegistry::new(monitor);
        let dir1 = TempDir::new().unwrap();
        let dir2 = TempDir::new().unwrap();
        registry.register(Arc::new(LocalOrigin::new("a", dir1.path())), 1);
        registry.register(Arc::new(LocalOrigin::new("b", dir2.path())), 2);
        let list = registry.list();
        assert_eq!(list.len(), 2);
    }
 }
@@ -1,255 +0,0 @@
 use crate::health::HealthSnapshot;
 use dashmap::DashMap;
 use musicfs_core::{Event, EventBus, OriginId};
 use std::sync::Arc;
 use std::time::Instant;
 use tracing::{debug, trace, warn};
 pub struct Router {
    priorities: DashMap<OriginId, u8>,
    latency_stats: DashMap<OriginId, LatencyStats>,
    event_bus: Option<Arc<EventBus>>,
 }
 #[derive(Debug, Clone, Default)]
 pub struct LatencyStats {
    pub samples: Vec<u64>,
    pub p50_ms: u64,
    pub p99_ms: u64,
    pub last_update: Option<Instant>,
 }
 impl LatencyStats {
    pub fn record(&mut self, latency_ms: u64) {
        self.samples.push(latency_ms);
        if self.samples.len() > 100 {
            self.samples.remove(0);
        }
        if !self.samples.is_empty() {
            let mut sorted = self.samples.clone();
            sorted.sort_unstable();
            let p50_idx = sorted.len() / 2;
            let p99_idx = (sorted.len() * 99) / 100;
            self.p50_ms = sorted[p50_idx];
            self.p99_ms = sorted.get(p99_idx).copied().unwrap_or(self.p50_ms);
        }
        self.last_update = Some(Instant::now());
    }
 }
 impl Router {
    pub fn new() -> Self {
        Self {
            priorities: DashMap::new(),
            latency_stats: DashMap::new(),
            event_bus: None,
        }
    }
    pub fn with_event_bus(mut self, bus: Arc<EventBus>) -> Self {
        self.event_bus = Some(bus);
        self
    }
    pub fn set_priority(&self, id: OriginId, priority: u8) {
        self.priorities.insert(id, priority);
    }
    pub fn remove_priority(&self, id: &OriginId) {
        self.priorities.remove(id);
        self.latency_stats.remove(id);
    }
    pub fn get_priority(&self, id: &OriginId) -> u8 {
        self.priorities.get(id).map(|p| *p).unwrap_or(100)
    }
    pub fn record_latency(&self, id: &OriginId, latency_ms: u64) {
        self.latency_stats
            .entry(id.clone())
            .or_default()
            .record(latency_ms);
    }
    pub fn select(&self, candidates: &[OriginId], health: &HealthSnapshot) -> Option<OriginId> {
        let selected = candidates
            .iter()
            .filter(|id| health.is_healthy(id))
            .min_by_key(|id| {
                let priority = self.get_priority(id);
                let latency = self.latency_stats.get(*id).map(|s| s.p50_ms).unwrap_or(0);
                (priority, latency)
            })
            .cloned();
        if let Some(ref id) = selected {
            let priority = self.get_priority(id);
            let latency = self.latency_stats.get(id).map(|s| s.p50_ms).unwrap_or(0);
            trace!(
                origin_id = %id,
                priority = priority,
                latency_ms = latency,
                "Selected healthy origin"
            );
        }
        selected
    }
    pub fn select_with_fallback(
        &self,
        candidates: &[OriginId],
        health: &HealthSnapshot,
    ) -> Option<OriginId> {
        if let Some(id) = self.select(candidates, health) {
            return Some(id);
        }
        debug!("No healthy origins, trying degraded");
        if let Some(id) = candidates
            .iter()
            .filter(|id| health.is_degraded(id))
            .min_by_key(|id| self.get_priority(id))
            .cloned()
        {
            trace!(
                origin_id = %id,
                priority = self.get_priority(&id),
                "Selected degraded origin as fallback"
            );
            return Some(id);
        }
        warn!("All origins unhealthy, selecting least-bad by failure count");
        if let Some(bus) = &self.event_bus {
            bus.publish(Event::AllOriginsUnhealthy {
                candidate_count: candidates.len(),
            });
        }
        let selected = candidates
            .iter()
            .min_by_key(|id| {
                let failures = health.failure_count(id).unwrap_or(u32::MAX);
                let priority = self.get_priority(id);
                (failures, priority)
            })
            .cloned();
        if let Some(ref id) = selected {
            let failures = health.failure_count(id).unwrap_or(u32::MAX);
            trace!(
                origin_id = %id,
                failure_count = failures,
                priority = self.get_priority(id),
                "Selected least-bad unhealthy origin"
            );
        }
        selected
    }
 }
 impl Default for Router {
    fn default() -> Self {
        Self::new()
    }
 }
 #[cfg(test)]
 mod tests {
    use super::*;
    use std::collections::HashMap;
    fn mock_health(healthy: &[&str], degraded: &[&str]) -> HealthSnapshot {
        HealthSnapshot {
            healthy: healthy.iter().map(|s| OriginId::from(*s)).collect(),
            degraded: degraded.iter().map(|s| OriginId::from(*s)).collect(),
            unhealthy: Vec::new(),
            failure_counts: HashMap::new(),
        }
    }
    #[test]
    fn test_select_by_priority() {
        let router = Router::new();
        router.set_priority(OriginId::from("high"), 1);
        router.set_priority(OriginId::from("low"), 2);
        let candidates = vec![OriginId::from("low"), OriginId::from("high")];
        let health = mock_health(&["high", "low"], &[]);
        let selected = router.select(&candidates, &health);
        assert_eq!(selected, Some(OriginId::from("high")));
    }
    #[test]
    fn test_select_skips_unhealthy() {
        let router = Router::new();
        router.set_priority(OriginId::from("high"), 1);
        router.set_priority(OriginId::from("low"), 2);
        let candidates = vec![OriginId::from("high"), OriginId::from("low")];
        let health = mock_health(&["low"], &[]);
        let selected = router.select(&candidates, &health);
        assert_eq!(selected, Some(OriginId::from("low")));
    }
    #[test]
    fn test_latency_affects_tiebreak() {
        let router = Router::new();
        router.set_priority(OriginId::from("a"), 1);
        router.set_priority(OriginId::from("b"), 1);
        router.record_latency(&OriginId::from("a"), 100);
        router.record_latency(&OriginId::from("b"), 10);
        let candidates = vec![OriginId::from("a"), OriginId::from("b")];
        let health = mock_health(&["a", "b"], &[]);
        let selected = router.select(&candidates, &health);
        assert_eq!(selected, Some(OriginId::from("b")));
    }
    #[test]
    fn test_fallback_to_degraded() {
        let router = Router::new();
        router.set_priority(OriginId::from("a"), 1);
        router.set_priority(OriginId::from("b"), 2);
        let candidates = vec![OriginId::from("a"), OriginId::from("b")];
        let health = mock_health(&[], &["b"]);
        let selected = router.select_with_fallback(&candidates, &health);
        assert_eq!(selected, Some(OriginId::from("b")));
    }
    #[test]
    fn test_fallback_least_bad() {
        let router = Router::new();
        router.set_priority(OriginId::from("a"), 1);
        router.set_priority(OriginId::from("b"), 2);
        let candidates = vec![OriginId::from("a"), OriginId::from("b")];
        let mut failure_counts = HashMap::new();
        failure_counts.insert(OriginId::from("a"), 5);
        failure_counts.insert(OriginId::from("b"), 2);
        let health = HealthSnapshot {
            healthy: Vec::new(),
            degraded: Vec::new(),
            unhealthy: vec![OriginId::from("a"), OriginId::from("b")],
            failure_counts,
        };
        let selected = router.select_with_fallback(&candidates, &health);
        assert_eq!(selected, Some(OriginId::from("b")));
    }
 }
@@ -1,49 +0,0 @@
 //! S3-compatible object storage origin
 //!
 //! This module is feature-gated behind the `s3` feature to avoid heavy AWS SDK dependencies.
 //!
 //! # Oracle Security Fixes (MUST IMPLEMENT)
 //!
 //! 1. **Range EOF** - Clamp range to `min(requested_end, file_size)` to avoid 416 errors
 //! 2. **Health check** - Use `head_bucket` not `list_objects_v2` (lighter operation)
 //! 3. **Timeout handling** - Wrap all remote calls with `tokio::time::timeout(30s)`
 //!
 //! # Example Implementation (when feature enabled)
 //!
 //! ```ignore
 //! async fn read(&self, path: &Path, offset: u64, size: u32) -> Result<Vec<u8>> {
 //!     // Oracle fix: Clamp range to file size to avoid 416 error
 //!     let file_size = self.stat(path).await?.size;
 //!     let end = std::cmp::min(offset + size as u64, file_size).saturating_sub(1);
 //!
 //!     if offset >= file_size {
 //!         return Ok(Vec::new()); // EOF
 //!     }
 //!
 //!     let range = format!("bytes={}-{}", offset, end);
 //!
 //!     // Oracle fix: Add timeout to prevent hung connections
 //!     let resp = tokio::time::timeout(
 //!         Duration::from_secs(30),
 //!         self.client.get_object().bucket(&self.bucket).key(&key).range(range).send()
 //!     )
 //!     .await
 //!     .map_err(|_| Error::Timeout("S3 read timed out".into()))?
 //!     .map_err(|e| Error::S3(e.to_string()))?;
 //!
 //!     // ...
 //! }
 //!
 //! async fn health(&self) -> HealthStatus {
 //!     // Oracle fix: Use head_bucket instead of list_objects_v2 (lighter)
 //!     match self.client.head_bucket().bucket(&self.bucket).send().await {
 //!         Ok(_) => HealthStatus::Healthy,
 //!         Err(_) => HealthStatus::Unhealthy,
 //!     }
 //! }
 //! ```
 #[cfg(feature = "s3")]
 mod implementation {
    // Full S3 implementation would go here when aws-sdk-s3 is enabled
 }
@@ -1,12 +0,0 @@
 #![allow(dead_code)]
 //! SFTP origin - feature-gated to avoid russh/deadpool dependencies
 #[cfg(feature = "sftp")]
 mod implementation {
    // Full SFTP implementation with connection pooling
    // Oracle fixes to implement:
    // 1. Use deadpool connection pool, not Arc<Mutex<SftpSession>>
    // 2. Verify SSH host keys against ~/.ssh/known_hosts
    // 3. Wrap all operations with tokio::time::timeout(30s)
    // 4. Cap open_read to actual file size, not u32::MAX
 }
@@ -1,156 +0,0 @@
 use crate::local::LocalOrigin;
 use crate::traits::{Origin, WatchCallback, WatchHandle};
 use async_trait::async_trait;
 use musicfs_core::{DirEntry, FileStat, HealthStatus, OriginId, OriginType, Result};
 use std::future::Future;
 use std::path::{Path, PathBuf};
 use tracing::{debug, warn};
 pub struct SmbOrigin {
    inner: LocalOrigin,
    share_path: String,
 }
 impl SmbOrigin {
    pub fn from_mount(
        id: impl Into<OriginId>,
        mount_point: impl Into<PathBuf>,
        share_path: impl Into<String>,
    ) -> Self {
        let mount_point = mount_point.into();
        let share_path = share_path.into();
        Self {
            inner: LocalOrigin::new(id, &mount_point),
            share_path,
        }
    }
    pub async fn is_mounted(&self) -> bool {
        self.inner.exists(Path::new("/")).await.unwrap_or(false)
    }
    async fn retry_on_disconnect<T, F, Fut>(&self, op: F) -> Result<T>
    where
        F: Fn() -> Fut,
        Fut: Future<Output = Result<T>>,
    {
        const MAX_RETRIES: u32 = 3;
        for attempt in 0..MAX_RETRIES {
            match op().await {
                Ok(val) => return Ok(val),
                Err(e) => {
                    if Self::is_enotconn(&e) && attempt < MAX_RETRIES - 1 {
                        debug!(attempt, "SMB ENOTCONN, retrying");
                        tokio::time::sleep(std::time::Duration::from_millis(100)).await;
                        continue;
                    }
                    return Err(e);
                }
            }
        }
        unreachable!()
    }
    #[cfg(unix)]
    fn is_enotconn(err: &musicfs_core::Error) -> bool {
        if let musicfs_core::Error::Io(io_err) = err {
            io_err.raw_os_error() == Some(libc::ENOTCONN)
        } else {
            false
        }
    }
    #[cfg(not(unix))]
    fn is_enotconn(_err: &musicfs_core::Error) -> bool {
        false
    }
 }
 #[async_trait]
 impl Origin for SmbOrigin {
    fn id(&self) -> &OriginId {
        self.inner.id()
    }
    fn origin_type(&self) -> OriginType {
        OriginType::Smb
    }
    fn display_name(&self) -> &str {
        &self.share_path
    }
    async fn readdir(&self, path: &Path) -> Result<Vec<DirEntry>> {
        self.retry_on_disconnect(|| self.inner.readdir(path)).await
    }
    async fn stat(&self, path: &Path) -> Result<FileStat> {
        self.retry_on_disconnect(|| self.inner.stat(path)).await
    }
    async fn read(&self, path: &Path, offset: u64, size: u32) -> Result<Vec<u8>> {
        self.retry_on_disconnect(|| self.inner.read(path, offset, size))
            .await
    }
    async fn read_full(&self, path: &Path) -> Result<Vec<u8>> {
        self.retry_on_disconnect(|| self.inner.read_full(path))
            .await
    }
    async fn exists(&self, path: &Path) -> Result<bool> {
        self.retry_on_disconnect(|| self.inner.exists(path)).await
    }
    async fn health(&self) -> HealthStatus {
        let health_timeout = std::time::Duration::from_secs(5);
        match tokio::time::timeout(health_timeout, self.is_mounted()).await {
            Ok(true) => HealthStatus::Healthy,
            Ok(false) | Err(_) => HealthStatus::Unhealthy,
        }
    }
    async fn open_read(&self, path: &Path) -> Result<Box<dyn tokio::io::AsyncRead + Send + Unpin>> {
        self.inner.open_read(path).await
    }
    async fn watch(&self, path: &Path, callback: WatchCallback) -> Result<WatchHandle> {
        warn!("SMB watch using inotify - may be unreliable. Consider polling for remote mounts.");
        self.inner.watch(path, callback).await
    }
 }
 #[cfg(test)]
 mod tests {
    use super::*;
    use tempfile::TempDir;
    #[tokio::test]
    async fn test_smb_origin_basic() {
        let dir = TempDir::new().unwrap();
        std::fs::write(dir.path().join("test.flac"), b"audio").unwrap();
        let origin = SmbOrigin::from_mount("smb-test", dir.path(), "//server/share");
        let entries = origin.readdir(Path::new("/")).await.unwrap();
        assert_eq!(entries.len(), 1);
    }
    #[tokio::test]
    async fn test_smb_origin_type() {
        let dir = TempDir::new().unwrap();
        let origin = SmbOrigin::from_mount("smb-test", dir.path(), "//server/share");
        assert_eq!(origin.origin_type(), OriginType::Smb);
    }
    #[tokio::test]
    async fn test_smb_display_name() {
        let dir = TempDir::new().unwrap();
        let origin = SmbOrigin::from_mount("smb-test", dir.path(), "//server/music");
        assert_eq!(origin.display_name(), "//server/music");
    }
 }
@@ -1,49 +0,0 @@
 use async_trait::async_trait;
 use musicfs_core::{DirEntry, FileStat, HealthStatus, OriginId, OriginType, Result};
 use std::path::{Path, PathBuf};
 use tokio::io::AsyncRead;
 #[async_trait]
 pub trait Origin: Send + Sync {
    fn id(&self) -> &OriginId;
    fn origin_type(&self) -> OriginType;
    fn display_name(&self) -> &str;
    async fn readdir(&self, path: &Path) -> Result<Vec<DirEntry>>;
    async fn stat(&self, path: &Path) -> Result<FileStat>;
    async fn read(&self, path: &Path, offset: u64, size: u32) -> Result<Vec<u8>>;
    /// Read entire file content (for CDC chunking of files <4GB)
    async fn read_full(&self, path: &Path) -> Result<Vec<u8>>;
    async fn exists(&self, path: &Path) -> Result<bool>;
    async fn health(&self) -> HealthStatus;
    async fn open_read(&self, path: &Path) -> Result<Box<dyn AsyncRead + Send + Unpin>>;
    async fn watch(&self, path: &Path, callback: WatchCallback) -> Result<WatchHandle>;
 }
 pub type WatchCallback = Box<dyn Fn(WatchEvent) + Send + Sync>;
 pub struct WatchHandle {
    _cancel: tokio::sync::oneshot::Sender<()>,
 }
 impl WatchHandle {
    pub fn new(cancel: tokio::sync::oneshot::Sender<()>) -> Self {
        Self { _cancel: cancel }
    }
 }
 #[derive(Debug, Clone)]
 pub enum WatchEvent {
    Created(PathBuf),
    Modified(PathBuf),
    Deleted(PathBuf),
 }
@@ -1,23 +0,0 @@
 [package]
 name = "musicfs-plugins"
 version.workspace = true
 edition.workspace = true
 [dependencies]
 musicfs-core = { path = "../musicfs-core" }
 async-trait.workspace = true
 tokio.workspace = true
 thiserror.workspace = true
 serde.workspace = true
 serde_json.workspace = true
 tracing.workspace = true
 libloading = "0.8"
 wasmtime = { version = "19", optional = true }
 semver = "1"
 [features]
 default = []
 wasm = ["wasmtime"]
 [dev-dependencies]
 tempfile.workspace = true
@@ -1,42 +0,0 @@
 use thiserror::Error;
 #[derive(Debug, Error)]
 pub enum PluginError {
    #[error("Plugin not found: {0}")]
    NotFound(String),
    #[error("Plugin load failed: {0}")]
    LoadFailed(String),
    #[error("Plugin initialization failed: {0}")]
    InitFailed(String),
    #[error("Plugin API version mismatch: expected {expected}, got {actual}")]
    VersionMismatch { expected: String, actual: String },
    #[error("Plugin already loaded: {0}")]
    AlreadyLoaded(String),
    #[error("Plugin symbol not found: {0}")]
    SymbolNotFound(String),
    #[error("IO error: {0}")]
    Io(#[from] std::io::Error),
    #[error("Plugin execution error: {0}")]
    Execution(String),
    #[error("Plugin shutdown error: {0}")]
    Shutdown(String),
    #[error("Configuration error: {0}")]
    Config(String),
    #[error("WASM error: {0}")]
    Wasm(String),
    #[error("Resource limit exceeded: {0}")]
    ResourceLimit(String),
 }
 pub type Result<T> = std::result::Result<T, PluginError>;
@@ -1,15 +0,0 @@
 pub mod error;
 pub mod manager;
 pub mod native;
 pub mod traits;
 pub mod wasm;
 pub use error::{PluginError, Result};
 pub use manager::{PluginConfig, PluginEntry, PluginManager, WasmConfig};
 pub use native::NativePluginHost;
 pub use traits::{
    ExternalMetadata, FormatPlugin, MetadataPlugin, MetadataQuery, MetadataQueryType,
    OriginDirEntry, OriginHealth, OriginInstance, OriginPlugin, OriginStat, Plugin, PluginId,
    PluginInfo, PluginType, WatchEvent, WatchHandle, PLUGIN_API_VERSION,
 };
 pub use wasm::{ResourceLimits, WasmPluginHost};
@@ -1,346 +0,0 @@
 use crate::error::{PluginError, Result};
 use crate::native::NativePluginHost;
 use crate::traits::{Plugin, PluginId, PluginInfo, PluginType};
 use crate::wasm::{ResourceLimits, WasmPluginHost};
 use serde::Deserialize;
 use serde_json::Value;
 use std::collections::HashMap;
 use std::path::PathBuf;
 use tracing::{debug, info};
 #[derive(Debug, Clone, Deserialize, Default)]
 pub struct PluginConfig {
    #[serde(default)]
    pub enabled: bool,
    #[serde(default)]
    pub search_paths: Vec<PathBuf>,
    #[serde(default)]
    pub plugins: HashMap<String, PluginEntry>,
    #[serde(default)]
    pub wasm: WasmConfig,
 }
 #[derive(Debug, Clone, Deserialize)]
 pub struct PluginEntry {
    pub path: PathBuf,
    #[serde(default)]
    pub enabled: bool,
    #[serde(default)]
    pub config: Value,
 }
 impl Default for PluginEntry {
    fn default() -> Self {
        Self {
            path: PathBuf::new(),
            enabled: true,
            config: Value::Null,
        }
    }
 }
 #[derive(Debug, Clone, Deserialize, Default)]
 pub struct WasmConfig {
    #[serde(default)]
    pub enabled: bool,
    #[serde(default)]
    pub max_memory_mb: Option<u32>,
    #[serde(default)]
    pub max_cpu_time_ms: Option<u32>,
 }
 pub struct PluginManager {
    native_host: NativePluginHost,
    wasm_host: WasmPluginHost,
    registry: PluginRegistry,
    config: PluginConfig,
 }
 struct PluginRegistry {
    origin_plugins: Vec<PluginId>,
    metadata_plugins: Vec<PluginId>,
    format_plugins: Vec<PluginId>,
 }
 impl PluginRegistry {
    fn new() -> Self {
        Self {
            origin_plugins: Vec::new(),
            metadata_plugins: Vec::new(),
            format_plugins: Vec::new(),
        }
    }
    fn register(&mut self, id: PluginId, plugin_type: PluginType) {
        match plugin_type {
            PluginType::Origin => {
                if !self.origin_plugins.contains(&id) {
                    self.origin_plugins.push(id);
                }
            }
            PluginType::Metadata => {
                if !self.metadata_plugins.contains(&id) {
                    self.metadata_plugins.push(id);
                }
            }
            PluginType::Format => {
                if !self.format_plugins.contains(&id) {
                    self.format_plugins.push(id);
                }
            }
        }
    }
    fn unregister(&mut self, id: PluginId) {
        self.origin_plugins.retain(|&x| x != id);
        self.metadata_plugins.retain(|&x| x != id);
        self.format_plugins.retain(|&x| x != id);
    }
 }
 impl PluginManager {
    pub fn new() -> Result<Self> {
        Ok(Self {
            native_host: NativePluginHost::new(),
            wasm_host: WasmPluginHost::new()?,
            registry: PluginRegistry::new(),
            config: PluginConfig::default(),
        })
    }
    pub fn init(config: &PluginConfig) -> Result<Self> {
        let mut manager = Self::new()?;
        manager.config = config.clone();
        if !config.enabled {
            info!("Plugin system disabled");
            return Ok(manager);
        }
        info!("Initializing plugin system");
        for path in &config.search_paths {
            manager.native_host.add_search_path(path.clone());
        }
        if config.wasm.enabled {
            let limits = ResourceLimits {
                max_memory_mb: config.wasm.max_memory_mb.unwrap_or(64),
                max_cpu_time_ms: config.wasm.max_cpu_time_ms.unwrap_or(5000),
                ..Default::default()
            };
            manager.wasm_host.set_limits(limits);
        }
        for (name, entry) in &config.plugins {
            if !entry.enabled {
                debug!("Skipping disabled plugin: {}", name);
                continue;
            }
            match manager.load_and_init(&entry.path, &entry.config) {
                Ok(id) => {
                    info!("Loaded plugin '{}' with id {:?}", name, id);
                }
                Err(e) => {
                    tracing::warn!("Failed to load plugin '{}': {}", name, e);
                }
            }
        }
        let discovered = manager.native_host.discover()?;
        for id in discovered {
            if let Some(info) = manager.native_host.list().iter().find(|i| i.id == id) {
                manager.registry.register(id, info.plugin_type);
            }
        }
        Ok(manager)
    }
    pub fn load_and_init(&mut self, path: &PathBuf, config: &Value) -> Result<PluginId> {
        let id = self.native_host.load(path)?;
        if let Some(plugin) = self.native_host.get_mut(id) {
            plugin.init(config.clone())?;
        }
        if let Some(info) = self.native_host.list().iter().find(|i| i.id == id) {
            self.registry.register(id, info.plugin_type);
        }
        Ok(id)
    }
    pub fn load_wasm(&mut self, wasm_bytes: &[u8]) -> Result<PluginId> {
        if !self.config.wasm.enabled {
            return Err(PluginError::Config("WASM plugins disabled".to_string()));
        }
        self.wasm_host.load(wasm_bytes)
    }
    pub fn unload(&mut self, id: PluginId) -> Result<()> {
        self.registry.unregister(id);
        if let Err(native_err) = self.native_host.unload(id) {
            if let Err(wasm_err) = self.wasm_host.unload(id) {
                return Err(PluginError::NotFound(format!(
                    "Plugin {:?} not found in native ({}) or WASM ({}) hosts",
                    id, native_err, wasm_err
                )));
            }
        }
        Ok(())
    }
    pub fn reload(&mut self, id: PluginId) -> Result<()> {
        self.native_host.reload(id)
    }
    pub fn reload_all(&mut self) -> Result<()> {
        let ids: Vec<PluginId> = self.native_host.list().iter().map(|i| i.id).collect();
        for id in ids {
            self.reload(id)?;
        }
        Ok(())
    }
    pub fn list(&self) -> Vec<PluginInfo> {
        let mut all = self.native_host.list();
        for (id, name) in self.wasm_host.list() {
            all.push(PluginInfo {
                id,
                name: name.to_string(),
                version: semver::Version::new(0, 0, 0),
                description: "WASM plugin".to_string(),
                plugin_type: PluginType::Origin,
            });
        }
        all
    }
    pub fn get(&self, id: PluginId) -> Option<&dyn Plugin> {
        self.native_host.get(id)
    }
    pub fn get_mut(&mut self, id: PluginId) -> Option<&mut dyn Plugin> {
        self.native_host.get_mut(id)
    }
    pub fn origin_plugin_ids(&self) -> &[PluginId] {
        &self.registry.origin_plugins
    }
    pub fn metadata_plugin_ids(&self) -> &[PluginId] {
        &self.registry.metadata_plugins
    }
    pub fn format_plugin_ids(&self) -> &[PluginId] {
        &self.registry.format_plugins
    }
    pub fn shutdown(&mut self) -> Result<()> {
        info!("Shutting down plugin system");
        let ids: Vec<PluginId> = self.list().iter().map(|i| i.id).collect();
        for id in ids {
            if let Err(e) = self.unload(id) {
                tracing::warn!("Failed to unload plugin {:?}: {}", id, e);
            }
        }
        Ok(())
    }
 }
 impl Default for PluginManager {
    fn default() -> Self {
        Self::new().expect("Failed to create plugin manager")
    }
 }
 impl Drop for PluginManager {
    fn drop(&mut self) {
        debug!(plugin_count = self.list().len(), "PluginManager dropping");
        let _ = self.shutdown();
    }
 }
 #[cfg(test)]
 mod tests {
    use super::*;
    #[test]
    fn test_plugin_manager_new() {
        let manager = PluginManager::new();
        assert!(manager.is_ok());
    }
    #[test]
    fn test_plugin_manager_disabled() {
        let config = PluginConfig {
            enabled: false,
            ..Default::default()
        };
        let manager = PluginManager::init(&config);
        assert!(manager.is_ok());
        let manager = manager.unwrap();
        assert!(manager.list().is_empty());
    }
    #[test]
    fn test_registry() {
        let mut registry = PluginRegistry::new();
        let id1 = PluginId::new(1);
        let id2 = PluginId::new(2);
        registry.register(id1, PluginType::Origin);
        registry.register(id2, PluginType::Metadata);
        assert_eq!(registry.origin_plugins.len(), 1);
        assert_eq!(registry.metadata_plugins.len(), 1);
        registry.unregister(id1);
        assert!(registry.origin_plugins.is_empty());
    }
    #[test]
    fn test_plugin_config_deserialize() {
        let json = r#"{
            "enabled": true,
            "search_paths": ["/usr/lib/musicfs/plugins"],
            "plugins": {
                "example": {
                    "path": "/path/to/plugin.so",
                    "enabled": true,
                    "config": {"key": "value"}
                }
            },
            "wasm": {
                "enabled": false
            }
        }"#;
        let config: PluginConfig = serde_json::from_str(json).unwrap();
        assert!(config.enabled);
        assert_eq!(config.search_paths.len(), 1);
        assert!(config.plugins.contains_key("example"));
    }
 }
@@ -1,300 +0,0 @@
 use crate::error::{PluginError, Result};
 use crate::traits::{Plugin, PluginId, PluginInfo, PluginType, PLUGIN_API_VERSION};
 use libloading::{Library, Symbol};
 use semver::Version;
 use std::collections::HashMap;
 use std::ffi::CStr;
 use std::path::{Path, PathBuf};
 use std::sync::atomic::{AtomicU64, Ordering};
 use tracing::{debug, info, warn};
 static NEXT_PLUGIN_ID: AtomicU64 = AtomicU64::new(1);
 fn next_plugin_id() -> PluginId {
    PluginId::new(NEXT_PLUGIN_ID.fetch_add(1, Ordering::SeqCst))
 }
 struct LoadedPlugin {
    id: PluginId,
    path: PathBuf,
    library: Library,
    instance: Box<dyn Plugin>,
    plugin_type: PluginType,
 }
 pub struct NativePluginHost {
    plugins: HashMap<PluginId, LoadedPlugin>,
    search_paths: Vec<PathBuf>,
 }
 impl NativePluginHost {
    pub fn new() -> Self {
        Self {
            plugins: HashMap::new(),
            search_paths: Vec::new(),
        }
    }
    pub fn add_search_path(&mut self, path: PathBuf) {
        if !self.search_paths.contains(&path) {
            self.search_paths.push(path);
        }
    }
    pub fn load(&mut self, path: &Path) -> Result<PluginId> {
        let canonical = path.canonicalize().map_err(|e| {
            PluginError::LoadFailed(format!("Cannot resolve path {}: {}", path.display(), e))
        })?;
        for plugin in self.plugins.values() {
            if plugin.path == canonical {
                return Err(PluginError::AlreadyLoaded(canonical.display().to_string()));
            }
        }
        info!("Loading native plugin from {:?}", canonical);
        let library = unsafe {
            Library::new(&canonical)
                .map_err(|e| PluginError::LoadFailed(format!("Failed to load library: {}", e)))?
        };
        self.verify_api_version(&library)?;
        let instance = self.create_plugin_instance(&library)?;
        let id = next_plugin_id();
        let plugin_type = self.detect_plugin_type(&*instance);
        debug!(
            "Loaded plugin '{}' v{} as {:?}",
            instance.name(),
            instance.version(),
            plugin_type
        );
        self.plugins.insert(
            id,
            LoadedPlugin {
                id,
                path: canonical,
                library,
                instance,
                plugin_type,
            },
        );
        Ok(id)
    }
    pub fn unload(&mut self, id: PluginId) -> Result<()> {
        let mut plugin = self
            .plugins
            .remove(&id)
            .ok_or_else(|| PluginError::NotFound(format!("Plugin {:?}", id)))?;
        info!("Unloading plugin '{}'", plugin.instance.name());
        plugin.instance.shutdown()?;
        drop(plugin.instance);
        drop(plugin.library);
        Ok(())
    }
    pub fn reload(&mut self, id: PluginId) -> Result<()> {
        let plugin = self
            .plugins
            .get(&id)
            .ok_or_else(|| PluginError::NotFound(format!("Plugin {:?}", id)))?;
        let path = plugin.path.clone();
        info!("Hot-reloading plugin from {:?}", path);
        self.unload(id)?;
        let new_id = self.load(&path)?;
        if let Some(plugin) = self.plugins.remove(&new_id) {
            self.plugins.insert(id, LoadedPlugin { id, ..plugin });
        }
        Ok(())
    }
    pub fn get(&self, id: PluginId) -> Option<&dyn Plugin> {
        self.plugins.get(&id).map(|p| &*p.instance as &dyn Plugin)
    }
    pub fn get_mut(&mut self, id: PluginId) -> Option<&mut dyn Plugin> {
        self.plugins
            .get_mut(&id)
            .map(|p| &mut *p.instance as &mut dyn Plugin)
    }
    pub fn list(&self) -> Vec<PluginInfo> {
        self.plugins
            .values()
            .map(|p| PluginInfo {
                id: p.id,
                name: p.instance.name().to_string(),
                version: p.instance.version(),
                description: p.instance.description().to_string(),
                plugin_type: p.plugin_type,
            })
            .collect()
    }
    pub fn find_by_name(&self, name: &str) -> Option<PluginId> {
        self.plugins
            .iter()
            .find(|(_, p)| p.instance.name() == name)
            .map(|(id, _)| *id)
    }
    pub fn discover(&mut self) -> Result<Vec<PluginId>> {
        let mut loaded = Vec::new();
        for search_path in self.search_paths.clone() {
            if !search_path.exists() {
                continue;
            }
            let entries = std::fs::read_dir(&search_path).map_err(|e| {
                PluginError::LoadFailed(format!(
                    "Cannot read plugin directory {}: {}",
                    search_path.display(),
                    e
                ))
            })?;
            for entry in entries.flatten() {
                let path = entry.path();
                if self.is_plugin_library(&path) {
                    match self.load(&path) {
                        Ok(id) => loaded.push(id),
                        Err(e) => {
                            warn!("Failed to load plugin {:?}: {}", path, e);
                        }
                    }
                }
            }
        }
        Ok(loaded)
    }
    fn verify_api_version(&self, library: &Library) -> Result<()> {
        let version_fn: Symbol<unsafe extern "C" fn() -> *const std::ffi::c_char> = unsafe {
            library.get(b"musicfs_plugin_api_version").map_err(|_| {
                PluginError::SymbolNotFound("musicfs_plugin_api_version".to_string())
            })?
        };
        let version_ptr = unsafe { version_fn() };
        let version_str = unsafe { CStr::from_ptr(version_ptr) }
            .to_str()
            .map_err(|_| PluginError::VersionMismatch {
                expected: PLUGIN_API_VERSION.to_string(),
                actual: "<invalid UTF-8>".to_string(),
            })?;
        let plugin_version =
            Version::parse(version_str).map_err(|_| PluginError::VersionMismatch {
                expected: PLUGIN_API_VERSION.to_string(),
                actual: version_str.to_string(),
            })?;
        let expected_version = Version::parse(PLUGIN_API_VERSION).unwrap();
        if plugin_version.major != expected_version.major {
            return Err(PluginError::VersionMismatch {
                expected: PLUGIN_API_VERSION.to_string(),
                actual: version_str.to_string(),
            });
        }
        Ok(())
    }
    fn create_plugin_instance(&self, library: &Library) -> Result<Box<dyn Plugin>> {
        let create_fn: Symbol<unsafe extern "C" fn() -> *mut dyn Plugin> = unsafe {
            library
                .get(b"musicfs_plugin_create")
                .map_err(|_| PluginError::SymbolNotFound("musicfs_plugin_create".to_string()))?
        };
        let plugin_ptr = unsafe { create_fn() };
        if plugin_ptr.is_null() {
            return Err(PluginError::LoadFailed(
                "Plugin factory returned null".to_string(),
            ));
        }
        let plugin = unsafe { Box::from_raw(plugin_ptr) };
        Ok(plugin)
    }
    fn detect_plugin_type(&self, plugin: &dyn Plugin) -> PluginType {
        plugin.plugin_type()
    }
    fn is_plugin_library(&self, path: &Path) -> bool {
        let extension = path.extension().and_then(|e| e.to_str());
        match extension {
            Some("so") => true,
            Some("dylib") => true,
            Some("dll") => true,
            _ => false,
        }
    }
 }
 impl Default for NativePluginHost {
    fn default() -> Self {
        Self::new()
    }
 }
 #[cfg(test)]
 mod tests {
    use super::*;
    #[test]
    fn test_native_host_creation() {
        let host = NativePluginHost::new();
        assert!(host.plugins.is_empty());
        assert!(host.search_paths.is_empty());
    }
    #[test]
    fn test_add_search_path() {
        let mut host = NativePluginHost::new();
        host.add_search_path(PathBuf::from("/usr/lib/musicfs/plugins"));
        host.add_search_path(PathBuf::from("/usr/lib/musicfs/plugins"));
        assert_eq!(host.search_paths.len(), 1);
    }
    #[test]
    fn test_is_plugin_library() {
        let host = NativePluginHost::new();
        assert!(host.is_plugin_library(Path::new("plugin.so")));
        assert!(host.is_plugin_library(Path::new("plugin.dylib")));
        assert!(host.is_plugin_library(Path::new("plugin.dll")));
        assert!(!host.is_plugin_library(Path::new("plugin.txt")));
        assert!(!host.is_plugin_library(Path::new("plugin")));
    }
    #[test]
    fn test_load_nonexistent() {
        let mut host = NativePluginHost::new();
        let result = host.load(Path::new("/nonexistent/plugin.so"));
        assert!(result.is_err());
    }
 }
@@ -1,339 +0,0 @@
 //! Plugin trait definitions (FR-23.1-23.4)
 //!
 //! Per architecture.md section 4.3.4:
 //! - Plugin trait: Base interface for all plugins
 //! - OriginPlugin: Creates Origin instances for storage backends
 //! - MetadataPlugin: Provides external metadata lookup
 //! - FormatPlugin: Handles custom audio format parsing
 use crate::error::Result;
 use async_trait::async_trait;
 use musicfs_core::AudioMeta;
 use semver::Version;
 use serde_json::Value;
 use std::io::Read;
 /// Current plugin API version
 pub const PLUGIN_API_VERSION: &str = "0.1.0";
 /// Unique identifier for a loaded plugin
 #[derive(Debug, Clone, Copy, PartialEq, Eq, Hash)]
 pub struct PluginId(pub u64);
 impl PluginId {
    pub fn new(id: u64) -> Self {
        Self(id)
    }
 }
 /// Plugin metadata returned by plugins
 #[derive(Debug, Clone)]
 pub struct PluginInfo {
    pub id: PluginId,
    pub name: String,
    pub version: Version,
    pub description: String,
    pub plugin_type: PluginType,
 }
 /// Type of plugin
 #[derive(Debug, Clone, Copy, PartialEq, Eq)]
 pub enum PluginType {
    Origin,
    Metadata,
    Format,
 }
 /// Base plugin interface (FR-23.1)
 ///
 /// All plugins must implement this trait. It provides:
 /// - Plugin identification (name, version)
 /// - Lifecycle management (init, shutdown)
 pub trait Plugin: Send + Sync {
    /// Unique plugin name (e.g., "s3-origin", "musicbrainz-metadata")
    fn name(&self) -> &str;
    /// Plugin version following semver
    fn version(&self) -> Version;
    /// Human-readable description
    fn description(&self) -> &str {
        ""
    }
    /// Plugin type for registry categorization
    fn plugin_type(&self) -> PluginType;
    /// Initialize plugin with configuration
    ///
    /// Called once after loading. The config value contains
    /// plugin-specific configuration from the main config file.
    fn init(&mut self, config: Value) -> Result<()>;
    /// Shutdown plugin and release resources
    ///
    /// Called before unloading. Plugins should clean up any
    /// resources (connections, file handles, etc).
    fn shutdown(&mut self) -> Result<()>;
 }
 /// Origin plugin interface (FR-23.3)
 ///
 /// Per architecture.md section 4.3.4:
 /// Origin plugins create `Box<dyn Origin>` instances for custom storage backends.
 ///
 /// Example use cases:
 /// - Google Drive origin
 /// - Dropbox origin
 /// - Custom NAS protocol
 #[async_trait]
 pub trait OriginPlugin: Plugin {
    /// Origin type identifier (e.g., "gdrive", "dropbox")
    fn origin_type(&self) -> &str;
    /// Create a new Origin instance with the given configuration
    ///
    /// The config contains origin-specific settings (credentials, paths, etc).
    /// Returns a boxed Origin that can be used by the OriginRouter.
    async fn create_origin(&self, id: &str, config: Value) -> Result<Box<dyn OriginInstance>>;
 }
 /// Instance created by OriginPlugin
 ///
 /// This is a simplified async interface that maps to the full Origin trait.
 /// The plugin host wraps this to provide the full Origin implementation.
 #[async_trait]
 pub trait OriginInstance: Send + Sync {
    /// List directory contents
    async fn readdir(&self, path: &str) -> Result<Vec<OriginDirEntry>>;
    /// Get file/directory stats
    async fn stat(&self, path: &str) -> Result<OriginStat>;
    /// Read file data
    async fn read(&self, path: &str, offset: u64, size: u32) -> Result<Vec<u8>>;
    /// Check if path exists
    async fn exists(&self, path: &str) -> Result<bool>;
    /// Health check
    async fn health(&self) -> OriginHealth;
    /// Watch path for changes (FR-10.2)
    async fn watch(
        &self,
        path: &str,
        callback: Box<dyn Fn(WatchEvent) + Send + Sync>,
    ) -> Result<WatchHandle>;
 }
 pub struct WatchHandle {
    _cancel: tokio::sync::oneshot::Sender<()>,
 }
 impl WatchHandle {
    pub fn new(cancel: tokio::sync::oneshot::Sender<()>) -> Self {
        Self { _cancel: cancel }
    }
 }
 #[derive(Debug, Clone)]
 pub enum WatchEvent {
    Created(String),
    Modified(String),
    Deleted(String),
 }
 /// Directory entry from plugin origin
 #[derive(Debug, Clone)]
 pub struct OriginDirEntry {
    pub name: String,
    pub is_dir: bool,
    pub size: u64,
    pub mtime_secs: u64,
 }
 /// File stats from plugin origin
 #[derive(Debug, Clone)]
 pub struct OriginStat {
    pub size: u64,
    pub mtime_secs: u64,
    pub is_dir: bool,
 }
 /// Origin health status
 #[derive(Debug, Clone, Copy, PartialEq, Eq)]
 pub enum OriginHealth {
    Healthy,
    Degraded,
    Unhealthy,
 }
 /// Metadata plugin interface (FR-23.3)
 ///
 /// Metadata plugins provide external metadata lookup from services like
 /// MusicBrainz, Discogs, Last.fm, etc.
 #[async_trait]
 pub trait MetadataPlugin: Plugin {
    /// Lookup metadata for a query
    ///
    /// Returns enriched metadata if found, None otherwise.
    async fn lookup(&self, query: &MetadataQuery) -> Result<Option<ExternalMetadata>>;
    /// Supported query types
    fn supported_queries(&self) -> &[MetadataQueryType] {
        &[MetadataQueryType::ByTitleArtist]
    }
 }
 /// Query for metadata lookup
 #[derive(Debug, Clone)]
 pub struct MetadataQuery {
    pub query_type: MetadataQueryType,
    pub title: Option<String>,
    pub artist: Option<String>,
    pub album: Option<String>,
    pub fingerprint: Option<String>,
    pub duration_ms: Option<u64>,
 }
 /// Type of metadata query
 #[derive(Debug, Clone, Copy, PartialEq, Eq)]
 pub enum MetadataQueryType {
    ByTitleArtist,
    ByFingerprint,
    ByAlbum,
 }
 /// External metadata returned by plugins
 #[derive(Debug, Clone, Default)]
 pub struct ExternalMetadata {
    pub title: Option<String>,
    pub artist: Option<String>,
    pub album: Option<String>,
    pub album_artist: Option<String>,
    pub genre: Option<String>,
    pub year: Option<u32>,
    pub track: Option<u32>,
    pub disc: Option<u32>,
    pub musicbrainz_id: Option<String>,
    pub artwork_url: Option<String>,
 }
 /// Format plugin interface (FR-24.1)
 ///
 /// Format plugins handle custom audio formats not supported by symphonia.
 ///
 /// Example use cases:
 /// - Custom lossless codecs
 /// - Proprietary formats
 /// - Game audio formats
 pub trait FormatPlugin: Plugin {
    /// File extensions this plugin handles
    fn extensions(&self) -> &[&str];
    /// Check if plugin can handle a specific extension
    fn can_handle(&self, extension: &str) -> bool {
        self.extensions()
            .iter()
            .any(|ext| ext.eq_ignore_ascii_case(extension))
    }
    /// Parse audio metadata from reader
    ///
    /// The reader provides the raw file bytes. Plugin should parse
    /// and return AudioMeta with whatever metadata it can extract.
    fn parse(&self, reader: &mut dyn Read) -> Result<AudioMeta>;
    /// Synthesize file header with updated metadata (FR-5.3)
    ///
    /// Creates a new file header containing the provided metadata.
    /// Used for metadata overlay - serving cached metadata without
    /// modifying the original file.
    fn synthesize_header(&self, metadata: &AudioMeta) -> Result<Vec<u8>>;
 }
 /// Declaration macro for native plugins
 ///
 /// Native plugins must export a function with this signature:
 /// ```ignore
 /// #[no_mangle]
 /// pub extern "C" fn musicfs_plugin_create() -> *mut dyn Plugin
 /// ```
 #[macro_export]
 macro_rules! declare_plugin {
    ($plugin_type:ty, $constructor:expr) => {
        #[no_mangle]
        pub extern "C" fn musicfs_plugin_create() -> *mut dyn $crate::Plugin {
            let plugin = $constructor;
            let boxed: Box<dyn $crate::Plugin> = Box::new(plugin);
            Box::into_raw(boxed)
        }
        #[no_mangle]
        pub extern "C" fn musicfs_plugin_api_version() -> *const std::ffi::c_char {
            concat!($crate::PLUGIN_API_VERSION, "\0").as_ptr() as *const std::ffi::c_char
        }
    };
 }
 #[cfg(test)]
 mod tests {
    use super::*;
    struct TestPlugin {
        name: String,
        initialized: bool,
    }
    impl Plugin for TestPlugin {
        fn name(&self) -> &str {
            &self.name
        }
        fn version(&self) -> Version {
            Version::new(1, 0, 0)
        }
        fn plugin_type(&self) -> PluginType {
            PluginType::Origin
        }
        fn init(&mut self, _config: Value) -> Result<()> {
            self.initialized = true;
            Ok(())
        }
        fn shutdown(&mut self) -> Result<()> {
            self.initialized = false;
            Ok(())
        }
    }
    #[test]
    fn test_plugin_lifecycle() {
        let mut plugin = TestPlugin {
            name: "test".to_string(),
            initialized: false,
        };
        assert_eq!(plugin.name(), "test");
        assert!(!plugin.initialized);
        plugin.init(Value::Null).unwrap();
        assert!(plugin.initialized);
        plugin.shutdown().unwrap();
        assert!(!plugin.initialized);
    }
    #[test]
    fn test_plugin_id() {
        let id1 = PluginId::new(1);
        let id2 = PluginId::new(1);
        let id3 = PluginId::new(2);
        assert_eq!(id1, id2);
        assert_ne!(id1, id3);
    }
 }
@@ -1,220 +0,0 @@
 use crate::error::{PluginError, Result};
 use crate::traits::PluginId;
 #[cfg(feature = "wasm")]
 use std::sync::atomic::{AtomicU64, Ordering};
 #[cfg(feature = "wasm")]
 static NEXT_WASM_PLUGIN_ID: AtomicU64 = AtomicU64::new(1_000_000);
 #[cfg(feature = "wasm")]
 fn next_wasm_plugin_id() -> PluginId {
    PluginId::new(NEXT_WASM_PLUGIN_ID.fetch_add(1, Ordering::SeqCst))
 }
 #[derive(Debug, Clone)]
 pub struct ResourceLimits {
    pub max_memory_mb: u32,
    pub max_cpu_time_ms: u32,
    pub allow_network: bool,
    pub allow_filesystem: bool,
 }
 impl Default for ResourceLimits {
    fn default() -> Self {
        Self {
            max_memory_mb: 64,
            max_cpu_time_ms: 5000,
            allow_network: false,
            allow_filesystem: false,
        }
    }
 }
 #[cfg(feature = "wasm")]
 mod wasm_impl {
    use super::*;
    use std::collections::HashMap;
    use tracing::info;
    use wasmtime::{Config, Engine, Linker, Module, Store};
    pub struct PluginState {
        limits: ResourceLimits,
    }
    pub struct WasmPlugin {
        id: PluginId,
        name: String,
        _module: Module,
    }
    impl WasmPlugin {
        pub fn id(&self) -> PluginId {
            self.id
        }
        pub fn name(&self) -> &str {
            &self.name
        }
    }
    pub struct WasmPluginHost {
        engine: Engine,
        linker: Linker<PluginState>,
        plugins: HashMap<PluginId, WasmPlugin>,
        limits: ResourceLimits,
    }
    impl WasmPluginHost {
        pub fn new() -> Result<Self> {
            let mut config = Config::new();
            config.consume_fuel(true);
            config.epoch_interruption(true);
            let engine = Engine::new(&config)
                .map_err(|e| PluginError::Wasm(format!("Failed to create WASM engine: {}", e)))?;
            let linker = Linker::new(&engine);
            Ok(Self {
                engine,
                linker,
                plugins: HashMap::new(),
                limits: ResourceLimits::default(),
            })
        }
        pub fn set_limits(&mut self, limits: ResourceLimits) {
            self.limits = limits;
        }
        pub fn load(&mut self, wasm_bytes: &[u8]) -> Result<PluginId> {
            info!("Loading WASM plugin ({} bytes)", wasm_bytes.len());
            let module = Module::new(&self.engine, wasm_bytes)
                .map_err(|e| PluginError::Wasm(format!("Failed to compile WASM module: {}", e)))?;
            let id = next_wasm_plugin_id();
            let name = module.name().unwrap_or("unnamed").to_string();
            let plugin = WasmPlugin {
                id,
                name,
                _module: module,
            };
            self.plugins.insert(id, plugin);
            Ok(id)
        }
        pub fn unload(&mut self, id: PluginId) -> Result<()> {
            self.plugins
                .remove(&id)
                .ok_or_else(|| PluginError::NotFound(format!("WASM plugin {:?}", id)))?;
            Ok(())
        }
        pub fn get(&self, id: PluginId) -> Option<&WasmPlugin> {
            self.plugins.get(&id)
        }
        pub fn list(&self) -> Vec<(PluginId, &str)> {
            self.plugins.iter().map(|(id, p)| (*id, p.name())).collect()
        }
        fn create_store(&self) -> Store<PluginState> {
            let state = PluginState {
                limits: self.limits.clone(),
            };
            let mut store = Store::new(&self.engine, state);
            let fuel = (self.limits.max_cpu_time_ms as u64) * 1_000_000;
            store.set_fuel(fuel).ok();
            store
        }
    }
    impl Default for WasmPluginHost {
        fn default() -> Self {
            Self::new().expect("Failed to create WASM host")
        }
    }
 }
 #[cfg(not(feature = "wasm"))]
 mod wasm_stub {
    use super::*;
    pub struct WasmPluginHost {
        limits: ResourceLimits,
    }
    impl WasmPluginHost {
        pub fn new() -> Result<Self> {
            Ok(Self {
                limits: ResourceLimits::default(),
            })
        }
        pub fn set_limits(&mut self, limits: ResourceLimits) {
            self.limits = limits;
        }
        pub fn load(&mut self, _wasm_bytes: &[u8]) -> Result<PluginId> {
            Err(PluginError::Wasm(
                "WASM support not enabled. Compile with --features wasm".to_string(),
            ))
        }
        pub fn unload(&mut self, _id: PluginId) -> Result<()> {
            Err(PluginError::Wasm("WASM support not enabled".to_string()))
        }
        pub fn list(&self) -> Vec<(PluginId, &str)> {
            Vec::new()
        }
    }
    impl Default for WasmPluginHost {
        fn default() -> Self {
            Self::new().expect("Failed to create WASM stub host")
        }
    }
 }
 #[cfg(feature = "wasm")]
 pub use wasm_impl::*;
 #[cfg(not(feature = "wasm"))]
 pub use wasm_stub::*;
 #[cfg(test)]
 mod tests {
    use super::*;
    #[test]
    fn test_resource_limits_default() {
        let limits = ResourceLimits::default();
        assert_eq!(limits.max_memory_mb, 64);
        assert_eq!(limits.max_cpu_time_ms, 5000);
        assert!(!limits.allow_network);
        assert!(!limits.allow_filesystem);
    }
    #[test]
    fn test_wasm_host_creation() {
        let host = WasmPluginHost::new();
        assert!(host.is_ok());
    }
    #[test]
    #[cfg(not(feature = "wasm"))]
    fn test_wasm_disabled_load_fails() {
        let mut host = WasmPluginHost::new().unwrap();
        let result = host.load(&[0x00, 0x61, 0x73, 0x6d]);
        assert!(result.is_err());
    }
 }
@@ -1,21 +0,0 @@
 [package]
 name = "musicfs-search"
 version.workspace = true
 edition.workspace = true
 [dependencies]
 musicfs-core = { path = "../musicfs-core" }
 tantivy.workspace = true
 moka.workspace = true
 parking_lot.workspace = true
 tokio = { workspace = true, features = ["sync", "time"] }
 tracing.workspace = true
 thiserror.workspace = true
 rusqlite.workspace = true
 serde.workspace = true
 serde_json.workspace = true
 [dev-dependencies]
 tempfile.workspace = true
 tokio = { workspace = true, features = ["rt-multi-thread", "macros"] }
@@ -1,321 +0,0 @@
 use parking_lot::Mutex;
 use serde::{Deserialize, Serialize};
 use std::path::Path;
 use std::time::{Duration, SystemTime};
 use tracing::{debug, info, warn};
 #[derive(Debug, Clone, Serialize, Deserialize)]
 pub struct SmartCollection {
    pub id: i64,
    pub name: String,
    pub query: CollectionQuery,
    pub created_at: SystemTime,
 }
 #[derive(Debug, Clone, Serialize, Deserialize)]
 #[serde(tag = "type")]
 pub enum CollectionQuery {
    Match {
        field: String,
        pattern: String,
    },
    DateRange {
        field: String,
        start: i32,
        end: i32,
    },
    RecentlyAdded {
        days: u32,
    },
    RecentlyPlayed {
        days: u32,
    },
    MostPlayed {
        limit: u32,
    },
    Genre {
        genre: String,
    },
    Compound {
        op: BoolOp,
        children: Vec<CollectionQuery>,
    },
 }
 #[derive(Debug, Clone, Copy, Serialize, Deserialize)]
 pub enum BoolOp {
    And,
    Or,
 }
 impl CollectionQuery {
    pub fn to_tantivy_query(&self) -> String {
        match self {
            CollectionQuery::Match { field, pattern } => {
                format!("{}:{}", field, pattern)
            }
            CollectionQuery::DateRange { field, start, end } => {
                format!("{}:[{} TO {}]", field, start, end)
            }
            CollectionQuery::Genre { genre } => {
                format!("genre:{}", genre)
            }
            CollectionQuery::Compound { op, children } => {
                let sep = match op {
                    BoolOp::And => " AND ",
                    BoolOp::Or => " OR ",
                };
                let parts: Vec<_> = children
                    .iter()
                    .map(|c| format!("({})", c.to_tantivy_query()))
                    .collect();
                parts.join(sep)
            }
            _ => String::new(),
        }
    }
    pub fn is_dynamic(&self) -> bool {
        matches!(
            self,
            CollectionQuery::RecentlyAdded { .. }
                | CollectionQuery::RecentlyPlayed { .. }
                | CollectionQuery::MostPlayed { .. }
        )
    }
 }
 pub struct CollectionStore {
    db: Mutex<rusqlite::Connection>,
 }
 impl CollectionStore {
    pub fn new(db_path: &Path) -> Result<Self, CollectionError> {
        let db = rusqlite::Connection::open(db_path)?;
        db.execute(
            "CREATE TABLE IF NOT EXISTS collections (
                id INTEGER PRIMARY KEY,
                name TEXT UNIQUE NOT NULL,
                query_json TEXT NOT NULL,
                created_at INTEGER NOT NULL
            )",
            [],
        )?;
        info!(path = ?db_path, "Collection store opened");
        Ok(Self { db: Mutex::new(db) })
    }
    pub fn create(
        &self,
        name: &str,
        query: CollectionQuery,
    ) -> Result<SmartCollection, CollectionError> {
        info!(name = %name, "Creating collection");
        let query_json = serde_json::to_string(&query)?;
        let now = SystemTime::now()
            .duration_since(SystemTime::UNIX_EPOCH)
            .unwrap()
            .as_secs() as i64;
        let db = self.db.lock();
        db.execute(
            "INSERT INTO collections (name, query_json, created_at) VALUES (?1, ?2, ?3)",
            rusqlite::params![name, query_json, now],
        )?;
        let id = db.last_insert_rowid();
        debug!(id = id, name = %name, "Collection created");
        Ok(SmartCollection {
            id,
            name: name.to_string(),
            query,
            created_at: SystemTime::UNIX_EPOCH + Duration::from_secs(now as u64),
        })
    }
    pub fn list(&self) -> Result<Vec<SmartCollection>, CollectionError> {
        let db = self.db.lock();
        let mut stmt = db.prepare("SELECT id, name, query_json, created_at FROM collections")?;
        let collections = stmt.query_map([], |row| {
            let query_json: String = row.get(2)?;
            let created_secs: i64 = row.get(3)?;
            let query = match serde_json::from_str(&query_json) {
                Ok(q) => q,
                Err(e) => {
                    warn!("Failed to parse collection query JSON: {}", e);
                    CollectionQuery::Match {
                        field: "title".to_string(),
                        pattern: "*".to_string(),
                    }
                }
            };
            Ok(SmartCollection {
                id: row.get(0)?,
                name: row.get(1)?,
                query,
                created_at: SystemTime::UNIX_EPOCH + Duration::from_secs(created_secs as u64),
            })
        })?;
        collections
            .collect::<Result<Vec<_>, _>>()
            .map_err(CollectionError::from)
    }
    pub fn get(&self, name: &str) -> Result<Option<SmartCollection>, CollectionError> {
        let db = self.db.lock();
        let mut stmt =
            db.prepare("SELECT id, name, query_json, created_at FROM collections WHERE name = ?1")?;
        let result = stmt
            .query_row([name], |row| {
                let query_json: String = row.get(2)?;
                let created_secs: i64 = row.get(3)?;
                let query = match serde_json::from_str(&query_json) {
                    Ok(q) => q,
                    Err(e) => {
                        warn!("Failed to parse collection query JSON: {}", e);
                        CollectionQuery::Match {
                            field: "title".to_string(),
                            pattern: "*".to_string(),
                        }
                    }
                };
                Ok(SmartCollection {
                    id: row.get(0)?,
                    name: row.get(1)?,
                    query,
                    created_at: SystemTime::UNIX_EPOCH + Duration::from_secs(created_secs as u64),
                })
            })
            .ok();
        Ok(result)
    }
    pub fn delete(&self, name: &str) -> Result<(), CollectionError> {
        info!(name = %name, "Deleting collection");
        let db = self.db.lock();
        db.execute("DELETE FROM collections WHERE name = ?1", [name])?;
        Ok(())
    }
 }
 pub fn builtin_collections() -> Vec<SmartCollection> {
    vec![
        SmartCollection {
            id: -1,
            name: "Recently Added".to_string(),
            query: CollectionQuery::RecentlyAdded { days: 30 },
            created_at: SystemTime::UNIX_EPOCH,
        },
        SmartCollection {
            id: -2,
            name: "80s Music".to_string(),
            query: CollectionQuery::DateRange {
                field: "year".to_string(),
                start: 1980,
                end: 1989,
            },
            created_at: SystemTime::UNIX_EPOCH,
        },
        SmartCollection {
            id: -3,
            name: "90s Music".to_string(),
            query: CollectionQuery::DateRange {
                field: "year".to_string(),
                start: 1990,
                end: 1999,
            },
            created_at: SystemTime::UNIX_EPOCH,
        },
    ]
 }
 #[derive(Debug, thiserror::Error)]
 pub enum CollectionError {
    #[error("database error: {0}")]
    Database(#[from] rusqlite::Error),
    #[error("serialization error: {0}")]
    Serialization(#[from] serde_json::Error),
 }
 #[cfg(test)]
 mod tests {
    use super::*;
    use tempfile::TempDir;
    #[test]
    fn test_collection_crud() {
        let dir = TempDir::new().unwrap();
        let db_path = dir.path().join("collections.db");
        let store = CollectionStore::new(&db_path).unwrap();
        let collection = store
            .create(
                "Jazz",
                CollectionQuery::Genre {
                    genre: "Jazz".to_string(),
                },
            )
            .unwrap();
        assert_eq!(collection.name, "Jazz");
        let collections = store.list().unwrap();
        assert_eq!(collections.len(), 1);
        store.delete("Jazz").unwrap();
        let collections = store.list().unwrap();
        assert_eq!(collections.len(), 0);
    }
    #[test]
    fn test_compound_query() {
        let query = CollectionQuery::Compound {
            op: BoolOp::And,
            children: vec![
                CollectionQuery::Genre {
                    genre: "Metal".to_string(),
                },
                CollectionQuery::DateRange {
                    field: "year".to_string(),
                    start: 1980,
                    end: 1989,
                },
            ],
        };
        let tantivy_query = query.to_tantivy_query();
        assert!(tantivy_query.contains("genre:Metal"));
        assert!(tantivy_query.contains("year:[1980 TO 1989]"));
        assert!(tantivy_query.contains(" AND "));
    }
    #[test]
    fn test_builtin_collections() {
        let builtins = builtin_collections();
        assert_eq!(builtins.len(), 3);
        assert!(builtins.iter().any(|c| c.name == "Recently Added"));
    }
    #[test]
    fn test_dynamic_query_detection() {
        assert!(CollectionQuery::RecentlyAdded { days: 30 }.is_dynamic());
        assert!(CollectionQuery::RecentlyPlayed { days: 7 }.is_dynamic());
        assert!(CollectionQuery::MostPlayed { limit: 100 }.is_dynamic());
        assert!(!CollectionQuery::Genre {
            genre: "Rock".to_string()
        }
        .is_dynamic());
    }
 }
@@ -1,417 +0,0 @@
 use musicfs_core::{AudioMeta, FileId, FileMeta, VirtualPath};
 use parking_lot::RwLock;
 use std::path::Path;
 use std::sync::Arc;
 use tantivy::collector::TopDocs;
 use tantivy::query::{BooleanQuery, FuzzyTermQuery, Occur, Query, QueryParser};
 use tantivy::schema::{Field, Schema, Value, INDEXED, STORED, TEXT};
 use tantivy::{Index, IndexReader, IndexWriter, ReloadPolicy, TantivyDocument, Term};
 use tracing::{debug, info, warn};
 const SCHEMA_VERSION: u32 = 1;
 pub struct SearchIndex {
    index: Index,
    reader: IndexReader,
    writer: Arc<RwLock<IndexWriter>>,
    schema: SearchSchema,
    pub schema_version: u32,
 }
 struct SearchSchema {
    schema: Schema,
    file_id: Field,
    virtual_path: Field,
    artist: Field,
    album: Field,
    album_artist: Field,
    title: Field,
    genre: Field,
    composer: Field,
    year: Field,
    duration_ms: Field,
    bitrate: Field,
    sample_rate: Field,
 }
 impl SearchSchema {
    fn new() -> Self {
        let mut builder = Schema::builder();
        Self {
            file_id: builder.add_u64_field("file_id", INDEXED | STORED),
            virtual_path: builder.add_text_field("virtual_path", STORED),
            artist: builder.add_text_field("artist", TEXT | STORED),
            album: builder.add_text_field("album", TEXT | STORED),
            album_artist: builder.add_text_field("album_artist", TEXT | STORED),
            title: builder.add_text_field("title", TEXT | STORED),
            genre: builder.add_text_field("genre", TEXT | STORED),
            composer: builder.add_text_field("composer", TEXT | STORED),
            year: builder.add_u64_field("year", INDEXED | STORED),
            duration_ms: builder.add_u64_field("duration_ms", STORED),
            bitrate: builder.add_u64_field("bitrate", STORED),
            sample_rate: builder.add_u64_field("sample_rate", STORED),
            schema: builder.build(),
        }
    }
 }
 #[derive(Debug, Clone)]
 pub struct SearchHit {
    pub file_id: FileId,
    pub virtual_path: VirtualPath,
    pub artist: Option<String>,
    pub album: Option<String>,
    pub title: Option<String>,
    pub score: f32,
 }
 impl SearchIndex {
    pub fn open(index_path: &Path) -> Result<Self, SearchError> {
        let schema_obj = SearchSchema::new();
        let index = if index_path.exists() && index_path.join("meta.json").exists() {
            Index::open_in_dir(index_path)?
        } else {
            std::fs::create_dir_all(index_path)?;
            Index::create_in_dir(index_path, schema_obj.schema.clone())?
        };
        let reader = index
            .reader_builder()
            .reload_policy(ReloadPolicy::OnCommitWithDelay)
            .try_into()?;
        let writer = index.writer(50_000_000)?;
        info!("Search index opened at {:?}", index_path);
        Ok(Self {
            index,
            reader,
            writer: Arc::new(RwLock::new(writer)),
            schema: schema_obj,
            schema_version: SCHEMA_VERSION,
        })
    }
    pub fn open_with_recovery(index_path: &Path) -> Result<Self, SearchError> {
        match Self::open(index_path) {
            Ok(index) => {
                let docs = index.reader.searcher().num_docs();
                info!(docs, "Search index opened successfully");
                Ok(index)
            }
            Err(e) => {
                warn!(
                    error = %e,
                    path = ?index_path,
                    "Search index corrupted, rebuilding from scratch"
                );
                if index_path.exists() {
                    std::fs::remove_dir_all(index_path).map_err(SearchError::Io)?;
                }
                Self::open(index_path)
            }
        }
    }
    pub fn index_file(&self, file: &FileMeta) -> Result<(), SearchError> {
        let mut doc = TantivyDocument::new();
        doc.add_u64(self.schema.file_id, file.id.0 as u64);
        doc.add_text(self.schema.virtual_path, file.virtual_path.as_str());
        if let Some(ref audio) = file.audio {
            Self::add_audio_fields(&mut doc, &self.schema, audio);
        }
        self.writer.read().add_document(doc)?;
        debug!("Indexed file {:?}", file.id);
        Ok(())
    }
    fn add_audio_fields(doc: &mut TantivyDocument, schema: &SearchSchema, audio: &AudioMeta) {
        if let Some(ref v) = audio.artist {
            doc.add_text(schema.artist, v);
        }
        if let Some(ref v) = audio.album {
            doc.add_text(schema.album, v);
        }
        if let Some(ref v) = audio.album_artist {
            doc.add_text(schema.album_artist, v);
        }
        if let Some(ref v) = audio.title {
            doc.add_text(schema.title, v);
        }
        if let Some(ref v) = audio.genre {
            doc.add_text(schema.genre, v);
        }
        if let Some(ref v) = audio.year {
            doc.add_u64(schema.year, *v as u64);
        }
        if let Some(v) = audio.duration_ms {
            doc.add_u64(schema.duration_ms, v);
        }
        if let Some(v) = audio.bitrate {
            doc.add_u64(schema.bitrate, v as u64);
        }
        if let Some(v) = audio.sample_rate {
            doc.add_u64(schema.sample_rate, v as u64);
        }
    }
    pub fn remove_file(&self, file_id: FileId) -> Result<(), SearchError> {
        let term = tantivy::Term::from_field_u64(self.schema.file_id, file_id.0 as u64);
        self.writer.read().delete_term(term);
        debug!("Removed file {:?} from index", file_id);
        Ok(())
    }
    pub fn remove_by_path(&self, path: &VirtualPath) -> Result<bool, SearchError> {
        let searcher = self.reader.searcher();
        let query_parser = QueryParser::for_index(&self.index, vec![self.schema.virtual_path]);
        let query = query_parser.parse_query(&format!("\"{}\"", path.as_str()))?;
        let top_docs = searcher.search(&query, &TopDocs::with_limit(1))?;
        if let Some((_, doc_address)) = top_docs.first() {
            let doc: TantivyDocument = searcher.doc(*doc_address)?;
            if let Some(file_id) = doc.get_first(self.schema.file_id).and_then(|v| v.as_u64()) {
                self.remove_file(FileId(file_id as i64))?;
                debug!("Removed file by path {:?}", path);
                return Ok(true);
            }
        }
        Ok(false)
    }
    pub fn commit(&self) -> Result<(), SearchError> {
        self.writer.write().commit()?;
        self.reader.reload()?;
        info!("Search index committed");
        Ok(())
    }
    pub fn search(&self, query_str: &str, limit: usize) -> Result<Vec<SearchHit>, SearchError> {
        let searcher = self.reader.searcher();
        let default_fields = vec![
            self.schema.artist,
            self.schema.album,
            self.schema.album_artist,
            self.schema.title,
            self.schema.genre,
            self.schema.composer,
        ];
        let query: Box<dyn Query> =
            if let Some((term, distance)) = Self::parse_fuzzy_query(query_str) {
                let subqueries: Vec<(Occur, Box<dyn Query>)> = default_fields
                    .iter()
                    .map(|&field| {
                        let term = Term::from_field_text(field, &term);
                        let fuzzy = FuzzyTermQuery::new(term, distance, true);
                        (Occur::Should, Box::new(fuzzy) as Box<dyn Query>)
                    })
                    .collect();
                Box::new(BooleanQuery::new(subqueries))
            } else {
                let query_parser = QueryParser::for_index(&self.index, default_fields);
                query_parser.parse_query(query_str)?
            };
        let top_docs = searcher.search(&*query, &TopDocs::with_limit(limit))?;
        let mut results = Vec::with_capacity(top_docs.len());
        for (score, doc_address) in top_docs {
            let doc: TantivyDocument = searcher.doc(doc_address)?;
            let file_id = doc
                .get_first(self.schema.file_id)
                .and_then(|v| v.as_u64())
                .map(|id| FileId(id as i64))
                .ok_or(SearchError::CorruptedIndex)?;
            let virtual_path = doc
                .get_first(self.schema.virtual_path)
                .and_then(|v| v.as_str())
                .map(|s| VirtualPath::new(s))
                .ok_or(SearchError::CorruptedIndex)?;
            results.push(SearchHit {
                file_id,
                virtual_path,
                artist: doc
                    .get_first(self.schema.artist)
                    .and_then(|v| v.as_str())
                    .map(String::from),
                album: doc
                    .get_first(self.schema.album)
                    .and_then(|v| v.as_str())
                    .map(String::from),
                title: doc
                    .get_first(self.schema.title)
                    .and_then(|v| v.as_str())
                    .map(String::from),
                score,
            });
        }
        debug!("Search '{}' returned {} results", query_str, results.len());
        Ok(results)
    }
    pub fn count(&self) -> u64 {
        self.reader.searcher().num_docs()
    }
    fn parse_fuzzy_query(query_str: &str) -> Option<(String, u8)> {
        let query_str = query_str.trim();
        if let Some(tilde_pos) = query_str.rfind('~') {
            let term = &query_str[..tilde_pos];
            let distance_str = &query_str[tilde_pos + 1..];
            if !term.is_empty() && !term.contains(':') && !term.contains(' ') {
                if let Ok(distance) = distance_str.parse::<u8>() {
                    if distance <= 2 {
                        return Some((term.to_lowercase(), distance));
                    }
                }
            }
        }
        None
    }
 }
 #[derive(Debug, thiserror::Error)]
 pub enum SearchError {
    #[error("tantivy error: {0}")]
    Tantivy(#[from] tantivy::TantivyError),
    #[error("query parse error: {0}")]
    QueryParse(#[from] tantivy::query::QueryParserError),
    #[error("IO error: {0}")]
    Io(#[from] std::io::Error),
    #[error("corrupted search index")]
    CorruptedIndex,
 }
 #[cfg(test)]
 mod tests {
    use super::*;
    use musicfs_core::{AudioFormat, OriginId, RealPath};
    use std::path::PathBuf;
    use tempfile::TempDir;
    fn make_file(id: i64, artist: &str, album: &str, title: &str) -> FileMeta {
        FileMeta {
            id: FileId(id),
            virtual_path: VirtualPath::new(format!("/{}/{}/{}.flac", artist, album, title)),
            real_path: RealPath {
                origin_id: OriginId::from("test"),
                path: PathBuf::from("test.flac"),
            },
            size: 1000,
            mtime: std::time::SystemTime::UNIX_EPOCH,
            content_hash: None,
            audio: Some(AudioMeta {
                artist: Some(artist.to_string()),
                album: Some(album.to_string()),
                title: Some(title.to_string()),
                genre: Some("Metal".to_string()),
                format: AudioFormat::Flac,
                ..Default::default()
            }),
        }
    }
    #[test]
    fn test_search_basic() {
        let dir = TempDir::new().unwrap();
        let index = SearchIndex::open(dir.path()).unwrap();
        index
            .index_file(&make_file(1, "Metallica", "Black Album", "Enter Sandman"))
            .unwrap();
        index
            .index_file(&make_file(2, "Metallica", "Master of Puppets", "Battery"))
            .unwrap();
        index
            .index_file(&make_file(3, "Iron Maiden", "Powerslave", "Aces High"))
            .unwrap();
        index.commit().unwrap();
        let results = index.search("metallica", 10).unwrap();
        assert_eq!(results.len(), 2);
        let results = index.search("sandman", 10).unwrap();
        assert_eq!(results.len(), 1);
        assert_eq!(results[0].title.as_deref(), Some("Enter Sandman"));
    }
    #[test]
    fn test_search_fuzzy() {
        let dir = TempDir::new().unwrap();
        let index = SearchIndex::open(dir.path()).unwrap();
        index
            .index_file(&make_file(1, "Metallica", "Black Album", "Enter Sandman"))
            .unwrap();
        index.commit().unwrap();
        let results = index.search("metalica~1", 10).unwrap();
        assert_eq!(results.len(), 1);
    }
    #[test]
    fn test_search_genre() {
        let dir = TempDir::new().unwrap();
        let index = SearchIndex::open(dir.path()).unwrap();
        index
            .index_file(&make_file(1, "Metallica", "Black Album", "Enter Sandman"))
            .unwrap();
        index.commit().unwrap();
        let results = index.search("genre:Metal", 10).unwrap();
        assert_eq!(results.len(), 1);
    }
    #[test]
    fn test_remove_file() {
        let dir = TempDir::new().unwrap();
        let index = SearchIndex::open(dir.path()).unwrap();
        index
            .index_file(&make_file(1, "Test", "Album", "Song"))
            .unwrap();
        index.commit().unwrap();
        assert_eq!(index.search("test", 10).unwrap().len(), 1);
        index.remove_file(FileId(1)).unwrap();
        index.commit().unwrap();
        assert_eq!(index.search("test", 10).unwrap().len(), 0);
    }
    #[test]
    fn test_index_persistence() {
        let dir = TempDir::new().unwrap();
        {
            let index = SearchIndex::open(dir.path()).unwrap();
            index
                .index_file(&make_file(1, "Artist", "Album", "Track"))
                .unwrap();
            index.commit().unwrap();
        }
        {
            let index = SearchIndex::open(dir.path()).unwrap();
            let results = index.search("artist", 10).unwrap();
            assert_eq!(results.len(), 1);
        }
    }
 }
@@ -1,236 +0,0 @@
 use crate::index::{SearchError, SearchIndex};
 use musicfs_core::{Event, EventBus, FileMeta};
 use std::sync::Arc;
 use tokio::sync::mpsc;
 use tracing::{debug, error, info, info_span, warn, Instrument};
 pub trait MetadataLookup: Send + Sync {
    fn lookup(&self, path: &musicfs_core::VirtualPath) -> Option<FileMeta>;
 }
 pub struct Indexer<M: MetadataLookup> {
    index: Arc<SearchIndex>,
    event_bus: Arc<EventBus>,
    metadata_lookup: Arc<M>,
 }
 impl<M: MetadataLookup + 'static> Indexer<M> {
    pub fn new(index: Arc<SearchIndex>, event_bus: Arc<EventBus>, metadata_lookup: Arc<M>) -> Self {
        Self {
            index,
            event_bus,
            metadata_lookup,
        }
    }
    pub fn start(self) -> IndexerHandle {
        let (stop_tx, mut stop_rx) = mpsc::channel::<()>(1);
        let mut event_rx = self.event_bus.subscribe();
        info!("Search indexer starting");
        tokio::spawn(
            async move {
                let mut pending_commit = false;
                let mut commit_timer = tokio::time::interval(std::time::Duration::from_secs(5));
                loop {
                    tokio::select! {
                        result = event_rx.recv() => {
                            match result {
                                Ok(event) => {
                                    if let Err(e) = self.handle_event(&event) {
                                        error!("Indexer error: {}", e);
                                    }
                                    pending_commit = true;
                                }
                                Err(tokio::sync::broadcast::error::RecvError::Lagged(n)) => {
                                    warn!(skipped = n, "Indexer lagged, skipped events");
                                }
                                Err(tokio::sync::broadcast::error::RecvError::Closed) => {
                                    debug!("Event channel closed");
                                    break;
                                }
                            }
                        }
                        _ = commit_timer.tick() => {
                            if pending_commit {
                                if let Err(e) = self.index.commit() {
                                    error!("Index commit error: {}", e);
                                }
                                pending_commit = false;
                            }
                        }
                        _ = stop_rx.recv() => {
                            info!("Indexer stopping");
                            if pending_commit {
                                let _ = self.index.commit();
                            }
                            break;
                        }
                    }
                }
            }
            .instrument(info_span!("search_indexer")),
        );
        IndexerHandle { stop_tx }
    }
    fn handle_event(&self, event: &Event) -> Result<(), SearchError> {
        match event {
            Event::FileAdded { path, .. } => {
                debug!("Indexing added file: {:?}", path);
                if let Some(meta) = self.metadata_lookup.lookup(path) {
                    self.index.index_file(&meta)?;
                } else {
                    warn!("No metadata found for added file: {:?}", path);
                }
            }
            Event::FileRemoved { path, file_id } => {
                debug!("Removing from index: {:?}", path);
                if let Some(id) = file_id {
                    self.index.remove_file(*id)?;
                } else if let Some(meta) = self.metadata_lookup.lookup(path) {
                    self.index.remove_file(meta.id)?;
                } else {
                    self.index.remove_by_path(path)?;
                }
            }
            Event::FileModified { path } => {
                debug!("Re-indexing modified file: {:?}", path);
                if let Some(meta) = self.metadata_lookup.lookup(path) {
                    self.index.remove_file(meta.id)?;
                    self.index.index_file(&meta)?;
                }
            }
            _ => {}
        }
        Ok(())
    }
    pub fn index_batch(&self, files: &[FileMeta]) -> Result<usize, SearchError> {
        let mut count = 0;
        for file in files {
            self.index.index_file(file)?;
            count += 1;
        }
        self.index.commit()?;
        info!("Indexed {} files", count);
        Ok(count)
    }
 }
 pub struct IndexerHandle {
    stop_tx: mpsc::Sender<()>,
 }
 impl IndexerHandle {
    pub async fn stop(self) {
        let _ = self.stop_tx.send(()).await;
    }
 }
 #[cfg(test)]
 mod tests {
    use super::*;
    use musicfs_core::{AudioFormat, AudioMeta, FileId, OriginId, RealPath, VirtualPath};
    use std::collections::HashMap;
    use std::path::PathBuf;
    use std::sync::RwLock;
    use tempfile::TempDir;
    struct MockMetadataLookup {
        files: RwLock<HashMap<String, FileMeta>>,
    }
    impl MockMetadataLookup {
        fn new() -> Self {
            Self {
                files: RwLock::new(HashMap::new()),
            }
        }
        fn insert(&self, meta: FileMeta) {
            self.files
                .write()
                .unwrap()
                .insert(meta.virtual_path.as_str().to_string(), meta);
        }
    }
    impl MetadataLookup for MockMetadataLookup {
        fn lookup(&self, path: &VirtualPath) -> Option<FileMeta> {
            self.files.read().unwrap().get(path.as_str()).cloned()
        }
    }
    fn make_file(id: i64, path: &str, artist: &str, title: &str) -> FileMeta {
        FileMeta {
            id: FileId(id),
            virtual_path: VirtualPath::new(path),
            real_path: RealPath {
                origin_id: OriginId::from("test"),
                path: PathBuf::from("test.flac"),
            },
            size: 1000,
            mtime: std::time::SystemTime::UNIX_EPOCH,
            content_hash: None,
            audio: Some(AudioMeta {
                artist: Some(artist.to_string()),
                title: Some(title.to_string()),
                format: AudioFormat::Flac,
                ..Default::default()
            }),
        }
    }
    #[tokio::test]
    async fn test_indexer_handles_file_added() {
        let dir = TempDir::new().unwrap();
        let index = Arc::new(SearchIndex::open(dir.path()).unwrap());
        let event_bus = Arc::new(EventBus::default());
        let metadata = Arc::new(MockMetadataLookup::new());
        let file = make_file(1, "/Artist/Album/Track.flac", "Artist", "Track");
        metadata.insert(file.clone());
        let indexer = Indexer::new(index.clone(), event_bus.clone(), metadata);
        let handle = indexer.start();
        event_bus.publish(Event::FileAdded {
            path: VirtualPath::new("/Artist/Album/Track.flac"),
            origin_id: OriginId::from("test"),
        });
        tokio::time::sleep(std::time::Duration::from_millis(100)).await;
        index.commit().unwrap();
        let results = index.search("artist", 10).unwrap();
        assert_eq!(results.len(), 1);
        handle.stop().await;
    }
    #[test]
    fn test_index_batch() {
        let dir = TempDir::new().unwrap();
        let index = Arc::new(SearchIndex::open(dir.path()).unwrap());
        let event_bus = Arc::new(EventBus::default());
        let metadata = Arc::new(MockMetadataLookup::new());
        let indexer = Indexer::new(index.clone(), event_bus, metadata);
        let files = vec![
            make_file(1, "/a.flac", "Artist1", "Song1"),
            make_file(2, "/b.flac", "Artist2", "Song2"),
            make_file(3, "/c.flac", "Artist3", "Song3"),
        ];
        let count = indexer.index_batch(&files).unwrap();
        assert_eq!(count, 3);
        let results = index.search("artist1", 10).unwrap();
        assert_eq!(results.len(), 1);
    }
 }
@@ -1,11 +0,0 @@
 mod collections;
 mod index;
 mod indexer;
 mod query;
 pub use collections::{
    builtin_collections, BoolOp, CollectionError, CollectionQuery, CollectionStore, SmartCollection,
 };
 pub use index::{SearchError, SearchHit, SearchIndex};
 pub use indexer::{Indexer, IndexerHandle, MetadataLookup};
 pub use query::SearchQueryBuilder;
@@ -1,78 +0,0 @@
 use tantivy::query::{BooleanQuery, FuzzyTermQuery, Occur, Query};
 use tantivy::schema::Field;
 use tantivy::Term;
 pub struct SearchQueryBuilder {
    fields: Vec<Field>,
    default_fuzziness: u8,
 }
 impl SearchQueryBuilder {
    pub fn new(fields: Vec<Field>) -> Self {
        Self {
            fields,
            default_fuzziness: 1,
        }
    }
    pub fn with_fuzziness(mut self, fuzziness: u8) -> Self {
        self.default_fuzziness = fuzziness;
        self
    }
    pub fn build_fuzzy(&self, query_text: &str) -> Box<dyn Query> {
        let terms: Vec<_> = query_text
            .split_whitespace()
            .filter(|t| !t.is_empty())
            .collect();
        if terms.is_empty() {
            return Box::new(tantivy::query::AllQuery);
        }
        let mut clauses: Vec<(Occur, Box<dyn Query>)> = Vec::new();
        for term in terms {
            let mut field_queries: Vec<(Occur, Box<dyn Query>)> = Vec::new();
            for field in &self.fields {
                let fuzzy = FuzzyTermQuery::new(
                    Term::from_field_text(*field, &term.to_lowercase()),
                    self.default_fuzziness,
                    true,
                );
                field_queries.push((Occur::Should, Box::new(fuzzy)));
            }
            let field_union = BooleanQuery::new(field_queries);
            clauses.push((Occur::Must, Box::new(field_union)));
        }
        Box::new(BooleanQuery::new(clauses))
    }
 }
 #[cfg(test)]
 mod tests {
    use super::*;
    use tantivy::schema::{Schema, TEXT};
    #[test]
    fn test_query_builder() {
        let mut schema_builder = Schema::builder();
        let artist = schema_builder.add_text_field("artist", TEXT);
        let title = schema_builder.add_text_field("title", TEXT);
        let builder = SearchQueryBuilder::new(vec![artist, title]);
        let _query = builder.build_fuzzy("metallica sandman");
    }
    #[test]
    fn test_empty_query() {
        let mut schema_builder = Schema::builder();
        let artist = schema_builder.add_text_field("artist", TEXT);
        let builder = SearchQueryBuilder::new(vec![artist]);
        let _query = builder.build_fuzzy("");
    }
 }
@@ -1,22 +0,0 @@
 [package]
 name = "musicfs-sync"
 version.workspace = true
 edition.workspace = true
 [dependencies]
 musicfs-core = { path = "../musicfs-core" }
 musicfs-origins = { path = "../musicfs-origins" }
 fastcdc = "3"
 xxhash-rust = { version = "0.8", features = ["xxh64"] }
 notify = "6"
 rmp-serde = "1"
 tokio = { workspace = true }
 tracing = { workspace = true }
 thiserror = { workspace = true }
 serde = { workspace = true }
 async-trait = { workspace = true }
 [dev-dependencies]
 tempfile = { workspace = true }
@@ -1,232 +0,0 @@
 use fastcdc::v2020::FastCDC;
 use musicfs_core::ChunkHash;
 pub struct CdcChunker {
    min_size: u32,
    avg_size: u32,
    max_size: u32,
 }
 impl Default for CdcChunker {
    fn default() -> Self {
        Self {
            min_size: 16 * 1024,
            avg_size: 64 * 1024,
            max_size: 256 * 1024,
        }
    }
 }
 #[derive(Debug, Clone)]
 pub struct Chunk {
    pub hash: ChunkHash,
    pub offset: u64,
    pub length: u32,
    pub data: Vec<u8>,
 }
 #[derive(Debug)]
 pub struct ChunkRef<'a> {
    pub hash: ChunkHash,
    pub offset: u64,
    pub length: u32,
    pub data: &'a [u8],
 }
 impl CdcChunker {
    pub fn new(min_size: u32, avg_size: u32, max_size: u32) -> Self {
        Self {
            min_size,
            avg_size,
            max_size,
        }
    }
    pub fn chunk(&self, data: &[u8]) -> Vec<Chunk> {
        let chunker = FastCDC::new(data, self.min_size, self.avg_size, self.max_size);
        chunker
            .map(|c| {
                let chunk_data = &data[c.offset..c.offset + c.length];
                Chunk {
                    hash: ChunkHash::from_bytes(chunk_data),
                    offset: c.offset as u64,
                    length: c.length as u32,
                    data: chunk_data.to_vec(),
                }
            })
            .collect()
    }
    pub fn chunk_refs<'a>(&self, data: &'a [u8]) -> Vec<ChunkRef<'a>> {
        let chunker = FastCDC::new(data, self.min_size, self.avg_size, self.max_size);
        chunker
            .map(|c| {
                let chunk_data = &data[c.offset..c.offset + c.length];
                ChunkRef {
                    hash: ChunkHash::from_bytes(chunk_data),
                    offset: c.offset as u64,
                    length: c.length as u32,
                    data: chunk_data,
                }
            })
            .collect()
    }
    pub fn chunk_streaming<F>(&self, data: &[u8], mut processor: F) -> usize
    where
        F: FnMut(ChunkRef<'_>),
    {
        let chunker = FastCDC::new(data, self.min_size, self.avg_size, self.max_size);
        let mut count = 0;
        for c in chunker {
            let chunk_data = &data[c.offset..c.offset + c.length];
            processor(ChunkRef {
                hash: ChunkHash::from_bytes(chunk_data),
                offset: c.offset as u64,
                length: c.length as u32,
                data: chunk_data,
            });
            count += 1;
        }
        count
    }
 }
 #[cfg(test)]
 mod tests {
    use super::*;
    #[test]
    fn test_cdc_basic() {
        let chunker = CdcChunker::default();
        let data = vec![0u8; 256 * 1024];
        let chunks = chunker.chunk(&data);
        assert!(!chunks.is_empty());
        let total: u64 = chunks.iter().map(|c| c.length as u64).sum();
        assert_eq!(total, data.len() as u64);
        let mut offset = 0u64;
        for chunk in &chunks {
            assert_eq!(chunk.offset, offset);
            offset += chunk.length as u64;
        }
    }
    #[test]
    fn test_cdc_stable_boundaries() {
        let chunker = CdcChunker::new(4 * 1024, 16 * 1024, 64 * 1024);
        let mut data1 = vec![0u8; 512 * 1024];
        for (i, b) in data1.iter_mut().enumerate() {
            *b = ((i * 17 + 31) % 256) as u8;
        }
        let mut data2 = vec![0xFFu8; 1024];
        data2.extend_from_slice(&data1);
        let chunks1 = chunker.chunk(&data1);
        let chunks2 = chunker.chunk(&data2);
        let hashes1: std::collections::HashSet<_> = chunks1.iter().map(|c| c.hash).collect();
        let hashes2: std::collections::HashSet<_> = chunks2.iter().map(|c| c.hash).collect();
        let shared = hashes1.intersection(&hashes2).count();
        assert!(
            shared > 0,
            "CDC should produce stable boundaries, got {} chunks in original, {} after prepend",
            chunks1.len(),
            chunks2.len()
        );
    }
    #[test]
    fn test_cdc_chunk_sizes() {
        let chunker = CdcChunker::default();
        let data: Vec<u8> = (0..1024 * 1024)
            .map(|i| ((i * 17 + 31) % 256) as u8)
            .collect();
        let chunks = chunker.chunk(&data);
        for chunk in &chunks {
            if chunk.offset + chunk.length as u64 != data.len() as u64 {
                assert!(
                    chunk.length >= chunker.min_size / 2,
                    "Chunk too small: {}",
                    chunk.length
                );
                assert!(
                    chunk.length <= chunker.max_size * 2,
                    "Chunk too large: {}",
                    chunk.length
                );
            }
        }
    }
    #[test]
    fn test_cdc_streaming() {
        let chunker = CdcChunker::default();
        let data = vec![0u8; 256 * 1024];
        let mut streamed = Vec::new();
        let count = chunker.chunk_streaming(&data, |chunk| {
            streamed.push((chunk.hash, chunk.offset, chunk.length));
        });
        let batched = chunker.chunk(&data);
        assert_eq!(count, batched.len());
        for (i, chunk) in batched.iter().enumerate() {
            assert_eq!(streamed[i].0, chunk.hash);
            assert_eq!(streamed[i].1, chunk.offset);
            assert_eq!(streamed[i].2, chunk.length);
        }
    }
    #[test]
    fn test_bandwidth_reduction_metadata_edit() {
        let chunker = CdcChunker::new(4 * 1024, 16 * 1024, 64 * 1024);
        let mut state = 12345u64;
        let original: Vec<u8> = (0..2 * 1024 * 1024)
            .map(|_| {
                state = state.wrapping_mul(6364136223846793005).wrapping_add(1);
                (state >> 56) as u8
            })
            .collect();
        let chunks1 = chunker.chunk(&original);
        let hashes1: std::collections::HashSet<_> = chunks1.iter().map(|c| c.hash).collect();
        let mut modified = original.clone();
        let mid = modified.len() / 2;
        for i in mid..mid + 100 {
            modified[i] = 0xFF;
        }
        let chunks2 = chunker.chunk(&modified);
        let hashes2: std::collections::HashSet<_> = chunks2.iter().map(|c| c.hash).collect();
        let reused = hashes1.intersection(&hashes2).count();
        let reuse_ratio = reused as f64 / chunks2.len() as f64;
        // NFR-6.4 requires >90% bandwidth reduction for typical edits
        assert!(
            reuse_ratio > 0.90,
            "Expected >90% chunk reuse for mid-file edit (NFR-6.4). Reused {}/{} chunks ({:.1}%, total {} original)",
            reused,
            chunks2.len(),
            reuse_ratio * 100.0,
            chunks1.len()
        );
    }
 }
@@ -1,338 +0,0 @@
 use crate::cdc::CdcChunker;
 use musicfs_core::{ChunkHash, FileId, FileMeta, OriginId};
 use musicfs_origins::Origin;
 use std::collections::{HashMap, HashSet};
 use std::path::PathBuf;
 use std::time::SystemTime;
 use tracing::{debug, info, trace};
 #[derive(Debug, Clone)]
 pub struct ScannedFile {
    pub path: PathBuf,
    pub origin_id: OriginId,
    pub size: u64,
    pub mtime: SystemTime,
 }
 #[derive(Debug, Default)]
 pub struct ChangeSet {
    pub added: Vec<ScannedFile>,
    pub removed: Vec<FileId>,
    pub modified: Vec<(FileId, ManifestDiff)>,
 }
 impl ChangeSet {
    pub fn is_empty(&self) -> bool {
        self.added.is_empty() && self.removed.is_empty() && self.modified.is_empty()
    }
    pub fn total_changes(&self) -> usize {
        self.added.len() + self.removed.len() + self.modified.len()
    }
 }
 #[derive(Debug, Clone)]
 pub struct ManifestChunk {
    pub hash: ChunkHash,
    pub offset: u64,
    pub size: u32,
 }
 #[derive(Debug)]
 pub struct ManifestDiff {
    pub reuse: Vec<ManifestChunk>,
    pub fetch: Vec<ManifestChunk>,
    pub orphaned: Vec<ChunkHash>,
 }
 pub struct DeltaDetector {
    chunker: CdcChunker,
 }
 impl DeltaDetector {
    pub fn new() -> Self {
        Self {
            chunker: CdcChunker::default(),
        }
    }
    pub fn with_chunker(chunker: CdcChunker) -> Self {
        Self { chunker }
    }
    pub async fn detect_changes(
        &self,
        origin: &dyn Origin,
        cached: &HashMap<FileId, FileMeta>,
        manifests: &HashMap<FileId, Vec<ManifestChunk>>,
    ) -> Result<ChangeSet, DeltaError> {
        let origin_id = origin.id().clone();
        info!(origin_id = %origin_id, "Starting delta detection");
        let mut changes = ChangeSet::default();
        let origin_files = self.scan_origin(origin).await?;
        trace!(origin_id = %origin_id, scanned_count = origin_files.len(), "Completed origin scan");
        let cached_by_path: HashMap<_, _> = cached
            .values()
            .map(|m| (m.real_path.path.clone(), m))
            .collect();
        for scanned in &origin_files {
            if let Some(cached_file) = cached_by_path.get(&scanned.path) {
                if self.is_modified_scan(cached_file, scanned) {
                    debug!(origin_id = %origin_id, path = ?scanned.path, "File modified");
                    if let Some(old_chunks) = manifests.get(&cached_file.id) {
                        let new_chunks = self.compute_chunks_for_scan(origin, scanned).await?;
                        let diff = self.compute_diff(old_chunks, &new_chunks);
                        changes.modified.push((cached_file.id, diff));
                    }
                }
            } else {
                debug!(origin_id = %origin_id, path = ?scanned.path, "File added");
                changes.added.push(scanned.clone());
            }
        }
        let origin_paths: HashSet<_> = origin_files.iter().map(|f| &f.path).collect();
        for cached_file in cached.values() {
            if !origin_paths.contains(&cached_file.real_path.path) {
                debug!(origin_id = %origin_id, path = ?cached_file.real_path.path, "File removed");
                changes.removed.push(cached_file.id);
            }
        }
        info!(
            origin_id = %origin_id,
            files_added = changes.added.len(),
            files_removed = changes.removed.len(),
            files_modified = changes.modified.len(),
            "Delta detection complete"
        );
        Ok(changes)
    }
    fn is_modified_scan(&self, cached: &FileMeta, scanned: &ScannedFile) -> bool {
        cached.size != scanned.size || cached.mtime != scanned.mtime
    }
    async fn scan_origin(&self, origin: &dyn Origin) -> Result<Vec<ScannedFile>, DeltaError> {
        let mut files = Vec::new();
        let mut dirs_to_scan = vec![PathBuf::from("/")];
        while let Some(dir) = dirs_to_scan.pop() {
            let entries = origin
                .readdir(&dir)
                .await
                .map_err(|e| DeltaError::OriginScan(e.to_string()))?;
            for entry in entries {
                let entry_path = dir.join(&entry.name);
                if entry.is_dir {
                    dirs_to_scan.push(entry_path);
                } else if Self::is_audio_file(&entry.name) {
                    let stat = origin
                        .stat(&entry_path)
                        .await
                        .map_err(|e| DeltaError::OriginScan(e.to_string()))?;
                    files.push(ScannedFile {
                        path: entry_path,
                        origin_id: origin.id().clone(),
                        size: stat.size,
                        mtime: stat.mtime,
                    });
                }
            }
        }
        Ok(files)
    }
    fn is_audio_file(name: &str) -> bool {
        let lower = name.to_lowercase();
        lower.ends_with(".flac")
            || lower.ends_with(".mp3")
            || lower.ends_with(".ogg")
            || lower.ends_with(".wav")
            || lower.ends_with(".m4a")
            || lower.ends_with(".aac")
            || lower.ends_with(".opus")
    }
    async fn compute_chunks_for_scan(
        &self,
        origin: &dyn Origin,
        scanned: &ScannedFile,
    ) -> Result<Vec<ManifestChunk>, DeltaError> {
        let data = origin
            .read_full(&scanned.path)
            .await
            .map_err(|e| DeltaError::OriginRead(e.to_string()))?;
        let chunks = self.chunker.chunk_refs(&data);
        Ok(chunks
            .into_iter()
            .map(|c| ManifestChunk {
                hash: c.hash,
                offset: c.offset,
                size: c.length,
            })
            .collect())
    }
    fn compute_diff(
        &self,
        old_chunks: &[ManifestChunk],
        new_chunks: &[ManifestChunk],
    ) -> ManifestDiff {
        let old_hashes: HashSet<_> = old_chunks.iter().map(|c| c.hash).collect();
        let new_hashes: HashSet<_> = new_chunks.iter().map(|c| c.hash).collect();
        ManifestDiff {
            reuse: new_chunks
                .iter()
                .filter(|c| old_hashes.contains(&c.hash))
                .cloned()
                .collect(),
            fetch: new_chunks
                .iter()
                .filter(|c| !old_hashes.contains(&c.hash))
                .cloned()
                .collect(),
            orphaned: old_chunks
                .iter()
                .filter(|c| !new_hashes.contains(&c.hash))
                .map(|c| c.hash)
                .collect(),
        }
    }
 }
 impl Default for DeltaDetector {
    fn default() -> Self {
        Self::new()
    }
 }
 #[derive(Debug, thiserror::Error)]
 pub enum DeltaError {
    #[error("Origin read error: {0}")]
    OriginRead(String),
    #[error("Origin scan error: {0}")]
    OriginScan(String),
 }
 #[cfg(test)]
 mod tests {
    use super::*;
    use musicfs_core::{OriginId, RealPath, VirtualPath};
    use std::time::SystemTime;
    fn make_file_meta(id: i64, path: &str, size: u64) -> FileMeta {
        FileMeta {
            id: FileId(id),
            virtual_path: VirtualPath::new(format!("/test/{}", path)),
            real_path: RealPath {
                origin_id: OriginId::from("test"),
                path: PathBuf::from(path),
            },
            size,
            mtime: SystemTime::UNIX_EPOCH,
            content_hash: None,
            audio: None,
        }
    }
    fn make_scanned_file(path: &str, size: u64) -> ScannedFile {
        ScannedFile {
            path: PathBuf::from(path),
            origin_id: OriginId::from("test"),
            size,
            mtime: SystemTime::UNIX_EPOCH,
        }
    }
    #[test]
    fn test_is_modified_size_change() {
        let detector = DeltaDetector::new();
        let cached = make_file_meta(1, "test.flac", 1000);
        let scanned = make_scanned_file("test.flac", 2000);
        assert!(detector.is_modified_scan(&cached, &scanned));
    }
    #[test]
    fn test_is_modified_same() {
        let detector = DeltaDetector::new();
        let cached = make_file_meta(1, "test.flac", 1000);
        let scanned = make_scanned_file("test.flac", 1000);
        assert!(!detector.is_modified_scan(&cached, &scanned));
    }
    #[test]
    fn test_is_audio_file() {
        assert!(DeltaDetector::is_audio_file("track.flac"));
        assert!(DeltaDetector::is_audio_file("song.MP3"));
        assert!(DeltaDetector::is_audio_file("audio.ogg"));
        assert!(!DeltaDetector::is_audio_file("readme.txt"));
        assert!(!DeltaDetector::is_audio_file("cover.jpg"));
    }
    #[test]
    fn test_compute_diff() {
        let detector = DeltaDetector::new();
        let old_chunks = vec![
            ManifestChunk {
                hash: ChunkHash::from_bytes(b"A"),
                offset: 0,
                size: 256,
            },
            ManifestChunk {
                hash: ChunkHash::from_bytes(b"B"),
                offset: 256,
                size: 256,
            },
            ManifestChunk {
                hash: ChunkHash::from_bytes(b"C"),
                offset: 512,
                size: 256,
            },
        ];
        let new_chunks = vec![
            ManifestChunk {
                hash: ChunkHash::from_bytes(b"A"),
                offset: 0,
                size: 256,
            },
            ManifestChunk {
                hash: ChunkHash::from_bytes(b"D"),
                offset: 256,
                size: 256,
            },
            ManifestChunk {
                hash: ChunkHash::from_bytes(b"C"),
                offset: 512,
                size: 256,
            },
        ];
        let diff = detector.compute_diff(&old_chunks, &new_chunks);
        assert_eq!(diff.reuse.len(), 2);
        assert_eq!(diff.fetch.len(), 1);
        assert_eq!(diff.orphaned.len(), 1);
    }
 }
@@ -1,7 +0,0 @@
 pub mod cdc;
 pub mod delta;
 pub mod watcher;
 pub use cdc::{CdcChunker, Chunk, ChunkRef};
 pub use delta::{ChangeSet, DeltaDetector, DeltaError, ManifestChunk, ManifestDiff};
 pub use watcher::{OriginWatcher, WatchError, WatchHandle};
@@ -1,218 +0,0 @@
 use musicfs_core::{Event, EventBus, OriginId, VirtualPath};
 use notify::{Config, RecommendedWatcher, RecursiveMode, Watcher};
 use std::collections::HashMap;
 use std::path::{Path, PathBuf};
 use std::sync::Arc;
 use std::time::Instant;
 use tokio::sync::mpsc;
 use tracing::{error, info, info_span, trace, Instrument};
 const DEBOUNCE_MS: u64 = 200;
 pub struct OriginWatcher {
    origin_id: OriginId,
    root: PathBuf,
    event_bus: Arc<EventBus>,
 }
 impl OriginWatcher {
    pub fn new(origin_id: OriginId, root: PathBuf, event_bus: Arc<EventBus>) -> Self {
        Self {
            origin_id,
            root,
            event_bus,
        }
    }
    pub fn start(self) -> WatchHandle {
        let (stop_tx, mut stop_rx) = mpsc::channel::<()>(1);
        let origin_id = self.origin_id.clone();
        let root = self.root.clone();
        let event_bus = self.event_bus.clone();
        let origin_id_str = origin_id.to_string();
        tokio::spawn(
            async move {
                if let Err(e) = Self::watch_loop(&origin_id, &root, &event_bus, &mut stop_rx).await
                {
                    error!("Watcher error: {}", e);
                }
            }
            .instrument(info_span!("file_watcher", origin_id = %origin_id_str)),
        );
        WatchHandle { stop_tx }
    }
    async fn watch_loop(
        origin_id: &OriginId,
        root: &Path,
        event_bus: &EventBus,
        stop_rx: &mut mpsc::Receiver<()>,
    ) -> Result<(), WatchError> {
        let (tx, mut rx) = mpsc::channel(100);
        let mut watcher = RecommendedWatcher::new(
            move |res: Result<notify::Event, notify::Error>| {
                if let Ok(event) = res {
                    let _ = tx.blocking_send(event);
                }
            },
            Config::default(),
        )
        .map_err(|e| WatchError::Init(e.to_string()))?;
        watcher
            .watch(root, RecursiveMode::Recursive)
            .map_err(|e| WatchError::Watch(e.to_string()))?;
        info!(origin_id = %origin_id, path = ?root, "Watcher started");
        let mut debouncer: HashMap<PathBuf, Instant> = HashMap::new();
        loop {
            tokio::select! {
                Some(event) = rx.recv() => {
                    Self::handle_notify_event(origin_id, root, event_bus, event, &mut debouncer);
                }
                _ = stop_rx.recv() => {
                    info!(origin_id = %origin_id, "Watcher stopped");
                    break;
                }
            }
        }
        Ok(())
    }
    fn handle_notify_event(
        origin_id: &OriginId,
        root: &Path,
        event_bus: &EventBus,
        event: notify::Event,
        debouncer: &mut HashMap<PathBuf, Instant>,
    ) {
        use notify::EventKind;
        let now = Instant::now();
        for path in event.paths {
            let relative = match path.strip_prefix(root) {
                Ok(p) => p.to_path_buf(),
                Err(_) => continue,
            };
            if !Self::is_audio_file(&path) {
                continue;
            }
            if let Some(last_seen) = debouncer.get(&relative) {
                if now.duration_since(*last_seen).as_millis() < DEBOUNCE_MS as u128 {
                    trace!(origin_id = %origin_id, path = ?relative, "Debouncing event");
                    continue;
                }
            }
            debouncer.insert(relative.clone(), now);
            let vpath = VirtualPath::new(format!("/{}", relative.display()));
            match event.kind {
                EventKind::Create(_) => {
                    trace!(origin_id = %origin_id, path = ?relative, "File created");
                    event_bus.publish(Event::FileAdded {
                        path: vpath,
                        origin_id: origin_id.clone(),
                    });
                }
                EventKind::Remove(_) => {
                    trace!(origin_id = %origin_id, path = ?relative, "File removed");
                    event_bus.publish(Event::FileRemoved {
                        path: vpath,
                        file_id: None,
                    });
                }
                EventKind::Modify(_) => {
                    trace!(origin_id = %origin_id, path = ?relative, "File modified");
                    event_bus.publish(Event::FileModified { path: vpath });
                }
                _ => {}
            }
        }
    }
    fn is_audio_file(path: &Path) -> bool {
        matches!(
            path.extension()
                .and_then(|e| e.to_str())
                .map(|e| e.to_lowercase())
                .as_deref(),
            Some("flac" | "mp3" | "ogg" | "wav" | "m4a" | "aac" | "opus")
        )
    }
 }
 pub struct WatchHandle {
    stop_tx: mpsc::Sender<()>,
 }
 impl WatchHandle {
    pub async fn stop(self) {
        let _ = self.stop_tx.send(()).await;
    }
 }
 impl Drop for WatchHandle {
    fn drop(&mut self) {
        trace!("WatchHandle dropped");
        let _ = self.stop_tx.try_send(());
    }
 }
 #[derive(Debug, thiserror::Error)]
 pub enum WatchError {
    #[error("Failed to initialize watcher: {0}")]
    Init(String),
    #[error("Failed to watch path: {0}")]
    Watch(String),
 }
 #[cfg(test)]
 mod tests {
    use super::*;
    use std::time::Duration;
    use tempfile::TempDir;
    #[tokio::test]
    async fn test_watcher_detects_create() {
        let dir = TempDir::new().unwrap();
        let event_bus = Arc::new(EventBus::default());
        let mut rx = event_bus.subscribe();
        let watcher =
            OriginWatcher::new(OriginId::from("test"), dir.path().to_path_buf(), event_bus);
        let handle = watcher.start();
        tokio::time::sleep(Duration::from_millis(100)).await;
        std::fs::write(dir.path().join("test.flac"), b"audio").unwrap();
        tokio::time::sleep(Duration::from_millis(300)).await;
        let event = rx.try_recv();
        assert!(matches!(event, Ok(Event::FileAdded { .. })));
        handle.stop().await;
    }
    #[test]
    fn test_is_audio_file() {
        assert!(OriginWatcher::is_audio_file(Path::new("/music/song.flac")));
        assert!(OriginWatcher::is_audio_file(Path::new("/music/song.MP3")));
        assert!(!OriginWatcher::is_audio_file(Path::new("/music/cover.jpg")));
        assert!(!OriginWatcher::is_audio_file(Path::new(
            "/music/readme.txt"
        )));
    }
 }
@@ -1,43 +0,0 @@
 [package]
 name = "musicfs-test-utils"
 version.workspace = true
 edition.workspace = true
 description = "Test utilities and fixtures for MusicFS resilience testing"
 [dependencies]
 musicfs-core = { path = "../musicfs-core" }
 musicfs-origins = { path = "../musicfs-origins" }
 musicfs-cas = { path = "../musicfs-cas" }
 musicfs-cache = { path = "../musicfs-cache" }
 musicfs-search = { path = "../musicfs-search" }
 async-trait.workspace = true
 tokio = { workspace = true, features = ["full", "sync", "time"] }
 tracing.workspace = true
 thiserror.workspace = true
 parking_lot.workspace = true
 tempfile.workspace = true
 bytes.workspace = true
 # Fault injection
 fail = { version = "0.5", optional = true }
 rlimit = { version = "0.10", optional = true }
 nix = { version = "0.29", optional = true, features = ["signal", "process"] }
 # Docker/network tests
 noxious-client = { version = "1.0", optional = true }
 reqwest = { version = "0.11", optional = true, default-features = false, features = ["rustls-tls"] }
 [features]
 default = []
 failpoints = ["fail/failpoints"]
 process-tests = ["nix"]
 resource-limits = ["rlimit"]
 docker-tests = ["noxious-client", "reqwest"]
 full = ["failpoints", "process-tests", "resource-limits", "docker-tests"]
 [dev-dependencies]
 tokio-test = "0.4"
 tokio-util.workspace = true
 sd-notify.workspace = true
 libc.workspace = true
@@ -1,204 +0,0 @@
 use musicfs_cas::CasError;
 use musicfs_core::Error;
 use std::time::{Duration, Instant};
 pub fn assert_error_contains<T, E: std::fmt::Debug>(result: Result<T, E>, expected_text: &str) {
    match result {
        Ok(_) => panic!("Expected error containing '{}', but got Ok", expected_text),
        Err(e) => {
            let error_msg = format!("{:?}", e);
            assert!(
                error_msg.contains(expected_text),
                "Expected error containing '{}', but got: {}",
                expected_text,
                error_msg
            );
        }
    }
 }
 pub fn assert_io_error<T>(result: Result<T, Error>) {
    match result {
        Err(Error::Io(_)) => (),
        Err(e) => panic!("Expected Io error, got: {:?}", e),
        Ok(_) => panic!("Expected Io error, got Ok"),
    }
 }
 pub fn assert_cas_io_error<T>(result: Result<T, CasError>) {
    match result {
        Err(CasError::Io(_)) => (),
        Err(e) => panic!("Expected CasError::Io, got: {:?}", e),
        Ok(_) => panic!("Expected CasError::Io, got Ok"),
    }
 }
 pub fn assert_cas_not_found<T>(result: Result<T, CasError>) {
    match result {
        Err(CasError::NotFound(_)) => (),
        Err(e) => panic!("Expected CasError::NotFound, got: {:?}", e),
        Ok(_) => panic!("Expected CasError::NotFound, got Ok"),
    }
 }
 pub fn assert_cas_integrity_error<T>(result: Result<T, CasError>) {
    match result {
        Err(CasError::IntegrityError { .. }) => (),
        Err(e) => panic!("Expected CasError::IntegrityError, got: {:?}", e),
        Ok(_) => panic!("Expected CasError::IntegrityError, got Ok"),
    }
 }
 pub fn assert_file_not_found<T>(result: Result<T, Error>) {
    match result {
        Err(Error::FileNotFound(_)) => (),
        Err(e) => panic!("Expected FileNotFound error, got: {:?}", e),
        Ok(_) => panic!("Expected FileNotFound error, got Ok"),
    }
 }
 pub fn assert_origin_error<T>(result: Result<T, Error>) {
    match result {
        Err(Error::Origin(_)) => (),
        Err(e) => panic!("Expected Origin error, got: {:?}", e),
        Ok(_) => panic!("Expected Origin error, got Ok"),
    }
 }
 pub fn assert_timeout_error<T>(result: Result<T, Error>) {
    match result {
        Err(Error::Timeout(_)) => (),
        Err(e) => panic!("Expected Timeout error, got: {:?}", e),
        Ok(_) => panic!("Expected Timeout error, got Ok"),
    }
 }
 pub struct TimedAssertion {
    start: Instant,
    min_duration: Option<Duration>,
    max_duration: Option<Duration>,
 }
 impl TimedAssertion {
    pub fn new() -> Self {
        Self {
            start: Instant::now(),
            min_duration: None,
            max_duration: None,
        }
    }
    pub fn expect_at_least(mut self, duration: Duration) -> Self {
        self.min_duration = Some(duration);
        self
    }
    pub fn expect_at_most(mut self, duration: Duration) -> Self {
        self.max_duration = Some(duration);
        self
    }
    pub fn assert_elapsed(self) {
        let elapsed = self.start.elapsed();
        if let Some(min) = self.min_duration {
            assert!(
                elapsed >= min,
                "Expected at least {:?}, but only {:?} elapsed",
                min,
                elapsed
            );
        }
        if let Some(max) = self.max_duration {
            assert!(
                elapsed <= max,
                "Expected at most {:?}, but {:?} elapsed",
                max,
                elapsed
            );
        }
    }
 }
 impl Default for TimedAssertion {
    fn default() -> Self {
        Self::new()
    }
 }
 pub async fn assert_completes_within<F, T>(future: F, timeout: Duration) -> T
 where
    F: std::future::Future<Output = T>,
 {
    tokio::time::timeout(timeout, future)
        .await
        .expect(&format!("Operation did not complete within {:?}", timeout))
 }
 pub async fn assert_times_out<F, T>(future: F, timeout: Duration)
 where
    F: std::future::Future<Output = T>,
 {
    match tokio::time::timeout(timeout, future).await {
        Ok(_) => panic!("Expected operation to time out, but it completed"),
        Err(_) => (),
    }
 }
 #[cfg(test)]
 mod tests {
    use super::*;
    #[test]
    fn test_assert_error_contains() {
        let result: Result<(), Error> = Err(Error::Origin("connection refused".into()));
        assert_error_contains(result, "connection");
    }
    #[test]
    #[should_panic(expected = "Expected error containing")]
    fn test_assert_error_contains_failure() {
        let result: Result<(), Error> = Err(Error::Origin("something else".into()));
        assert_error_contains(result, "connection");
    }
    #[test]
    fn test_assert_io_error() {
        let result: Result<(), Error> = Err(Error::Io(std::io::Error::new(
            std::io::ErrorKind::Other,
            "test",
        )));
        assert_io_error(result);
    }
    #[test]
    fn test_timed_assertion_at_least() {
        let timer = TimedAssertion::new().expect_at_least(Duration::from_millis(10));
        std::thread::sleep(Duration::from_millis(15));
        timer.assert_elapsed();
    }
    #[test]
    fn test_timed_assertion_at_most() {
        let timer = TimedAssertion::new().expect_at_most(Duration::from_millis(100));
        timer.assert_elapsed();
    }
    #[tokio::test]
    async fn test_assert_completes_within() {
        let result = assert_completes_within(async { 42 }, Duration::from_millis(100)).await;
        assert_eq!(result, 42);
    }
    #[tokio::test]
    async fn test_assert_times_out() {
        assert_times_out(
            async {
                tokio::time::sleep(Duration::from_secs(10)).await;
            },
            Duration::from_millis(10),
        )
        .await;
    }
 }
@@ -1,250 +0,0 @@
 use bytes::Bytes;
 use musicfs_cas::{CasConfig, CasError, CasStore, DedupStats};
 use musicfs_core::ChunkHash;
 use std::io::{self, ErrorKind};
 use std::sync::atomic::{AtomicBool, AtomicUsize, Ordering};
 use std::sync::Arc;
 pub struct FaultyCasStore {
    inner: Arc<CasStore>,
    inject_enospc: AtomicBool,
    inject_eio_on_read: AtomicBool,
    inject_eio_on_write: AtomicBool,
    inject_corruption: AtomicBool,
    fail_after_n_puts: AtomicUsize,
    put_count: AtomicUsize,
 }
 impl FaultyCasStore {
    pub fn new(inner: Arc<CasStore>) -> Self {
        Self {
            inner,
            inject_enospc: AtomicBool::new(false),
            inject_eio_on_read: AtomicBool::new(false),
            inject_eio_on_write: AtomicBool::new(false),
            inject_corruption: AtomicBool::new(false),
            fail_after_n_puts: AtomicUsize::new(usize::MAX),
            put_count: AtomicUsize::new(0),
        }
    }
    pub async fn open(config: CasConfig) -> Result<Self, CasError> {
        let store = CasStore::open(config).await?;
        Ok(Self::new(Arc::new(store)))
    }
    pub fn set_inject_enospc(&self, enabled: bool) {
        self.inject_enospc.store(enabled, Ordering::SeqCst);
    }
    pub fn set_inject_eio_on_read(&self, enabled: bool) {
        self.inject_eio_on_read.store(enabled, Ordering::SeqCst);
    }
    pub fn set_inject_eio_on_write(&self, enabled: bool) {
        self.inject_eio_on_write.store(enabled, Ordering::SeqCst);
    }
    pub fn set_inject_corruption(&self, enabled: bool) {
        self.inject_corruption.store(enabled, Ordering::SeqCst);
    }
    pub fn set_fail_after_n_puts(&self, n: usize) {
        self.fail_after_n_puts.store(n, Ordering::SeqCst);
        self.put_count.store(0, Ordering::SeqCst);
    }
    pub fn reset_faults(&self) {
        self.inject_enospc.store(false, Ordering::SeqCst);
        self.inject_eio_on_read.store(false, Ordering::SeqCst);
        self.inject_eio_on_write.store(false, Ordering::SeqCst);
        self.inject_corruption.store(false, Ordering::SeqCst);
        self.fail_after_n_puts.store(usize::MAX, Ordering::SeqCst);
        self.put_count.store(0, Ordering::SeqCst);
    }
    pub fn put_count(&self) -> usize {
        self.put_count.load(Ordering::SeqCst)
    }
    pub async fn put(&self, data: &[u8]) -> Result<ChunkHash, CasError> {
        let count = self.put_count.fetch_add(1, Ordering::SeqCst);
        if self.inject_enospc.load(Ordering::SeqCst) {
            return Err(CasError::Io(io::Error::new(
                ErrorKind::Other,
                "No space left on device (ENOSPC injected)",
            )));
        }
        if self.inject_eio_on_write.load(Ordering::SeqCst) {
            return Err(CasError::Io(io::Error::new(
                ErrorKind::Other,
                "Input/output error (EIO injected)",
            )));
        }
        let threshold = self.fail_after_n_puts.load(Ordering::SeqCst);
        if count >= threshold {
            return Err(CasError::Io(io::Error::new(
                ErrorKind::Other,
                "Injected failure after N puts",
            )));
        }
        self.inner.put(data).await
    }
    pub async fn get(&self, hash: &ChunkHash) -> Result<Bytes, CasError> {
        if self.inject_eio_on_read.load(Ordering::SeqCst) {
            return Err(CasError::Io(io::Error::new(
                ErrorKind::Other,
                "Input/output error (EIO injected)",
            )));
        }
        let data = self.inner.get(hash).await?;
        if self.inject_corruption.load(Ordering::SeqCst) {
            let mut corrupted = data.to_vec();
            if !corrupted.is_empty() {
                corrupted[0] = corrupted[0].wrapping_add(1);
            }
            return Err(CasError::IntegrityError {
                expected: hash.as_hex(),
                actual: ChunkHash::from_bytes(&corrupted).as_hex(),
            });
        }
        Ok(data)
    }
    pub fn exists(&self, hash: &ChunkHash) -> bool {
        self.inner.exists(hash)
    }
    pub async fn delete(&self, hash: &ChunkHash) -> Result<(), CasError> {
        if self.inject_eio_on_write.load(Ordering::SeqCst) {
            return Err(CasError::Io(io::Error::new(
                ErrorKind::Other,
                "Input/output error (EIO injected)",
            )));
        }
        self.inner.delete(hash).await
    }
    pub fn current_size(&self) -> u64 {
        self.inner.current_size()
    }
    pub fn max_size(&self) -> u64 {
        self.inner.max_size()
    }
    pub fn list_chunks(&self) -> impl Iterator<Item = ChunkHash> + '_ {
        self.inner.list_chunks()
    }
    pub fn dedup_stats(&self) -> DedupStats {
        self.inner.dedup_stats()
    }
    pub fn inner(&self) -> &Arc<CasStore> {
        &self.inner
    }
 }
 #[cfg(test)]
 mod tests {
    use super::*;
    use tempfile::TempDir;
    async fn test_store() -> (FaultyCasStore, TempDir) {
        let dir = TempDir::new().unwrap();
        let config = CasConfig {
            chunks_dir: dir.path().join("chunks"),
            max_size: 1024 * 1024,
            shard_levels: 2,
        };
        let store = FaultyCasStore::open(config).await.unwrap();
        (store, dir)
    }
    #[tokio::test]
    async fn test_healthy_passthrough() {
        let (store, _dir) = test_store().await;
        let data = b"test data";
        let hash = store.put(data).await.unwrap();
        let retrieved = store.get(&hash).await.unwrap();
        assert_eq!(&retrieved[..], data);
    }
    #[tokio::test]
    async fn test_inject_enospc() {
        let (store, _dir) = test_store().await;
        store.set_inject_enospc(true);
        let result = store.put(b"test").await;
        assert!(result.is_err());
        let err = result.unwrap_err();
        assert!(matches!(err, CasError::Io(_)));
        store.set_inject_enospc(false);
        assert!(store.put(b"test").await.is_ok());
    }
    #[tokio::test]
    async fn test_inject_eio_on_read() {
        let (store, _dir) = test_store().await;
        let hash = store.put(b"test").await.unwrap();
        store.set_inject_eio_on_read(true);
        let result = store.get(&hash).await;
        assert!(result.is_err());
        store.set_inject_eio_on_read(false);
        assert!(store.get(&hash).await.is_ok());
    }
    #[tokio::test]
    async fn test_inject_corruption() {
        let (store, _dir) = test_store().await;
        let hash = store.put(b"test data").await.unwrap();
        store.set_inject_corruption(true);
        let result = store.get(&hash).await;
        assert!(matches!(result, Err(CasError::IntegrityError { .. })));
    }
    #[tokio::test]
    async fn test_fail_after_n_puts() {
        let (store, _dir) = test_store().await;
        store.set_fail_after_n_puts(2);
        assert!(store.put(b"data1").await.is_ok());
        assert!(store.put(b"data2").await.is_ok());
        assert!(store.put(b"data3").await.is_err());
        assert!(store.put(b"data4").await.is_err());
        assert_eq!(store.put_count(), 4);
    }
    #[tokio::test]
    async fn test_reset_faults() {
        let (store, _dir) = test_store().await;
        store.set_inject_enospc(true);
        store.set_inject_eio_on_read(true);
        store.set_fail_after_n_puts(1);
        store.reset_faults();
        assert!(store.put(b"test").await.is_ok());
        let hash = store.put(b"test2").await.unwrap();
        assert!(store.get(&hash).await.is_ok());
    }
 }
--- a/Show More
+++ b/Show More
Author	SHA1	Message	Date
Alexander	d49018bfc7	Implement write method to support metadata update	2026-06-27 00:16:04 +02:00
Alexander	9737e26bc9	Read and store flac metadata	2026-06-26 23:27:33 +02:00
Alexander	4f52549e46	Add rename of the files with keeping the state	2026-06-26 20:54:01 +02:00
Alexander	68aba52362	Handle files as tree on fuse side	2026-06-26 20:25:33 +02:00
Alexander	a5023a6441	Integrate with db	2026-06-26 19:53:50 +02:00
Alexander	3d1f9a206f	Hash the source files diff	2026-06-26 17:56:56 +02:00
Alexander	536e117576	Parse music metadata	2026-06-25 21:04:47 +02:00
Alexander	b51c680af4	Handle updates of source files	2026-06-24 21:56:12 +02:00
Alexander	f84061a30d	Flat representation of localsource	2026-06-20 17:49:35 +02:00
Alexander	9349d29200	Start implementing LocalSource	2026-06-20 13:36:15 +02:00
Alexander	872580602d	Added read files + lookup	2026-06-19 21:37:32 +02:00
Alexander	50cb21b9e5	Implement read and stat for dir	2026-06-19 18:45:08 +02:00
Alexander	b1f32372f7	Migrate to denenv	2026-06-19 00:07:35 +02:00
Alexander	83ff042b91	Start anew	2026-06-18 23:15:11 +02:00