package auth

import (
	"encoding/json"
	"os"
	"path/filepath"
	"strings"
	"testing"
)

func TestDefaultCredentialPath(t *testing.T) {
	path, err := DefaultCredentialPath()
	if err != nil {
		t.Fatalf("DefaultCredentialPath error: %v", err)
	}
	if !strings.HasSuffix(path, filepath.Join(".claude", ".credentials.json")) {
		t.Errorf("path = %q, want suffix .claude/.credentials.json", path)
	}
}

func TestLoadDefaultCredentials_MissingFile(t *testing.T) {
	// When credential file doesn't exist, returns nil, nil
	path, err := DefaultCredentialPath()
	if err != nil {
		t.Skip("cannot determine home dir")
	}
	if _, statErr := os.Stat(path); os.IsNotExist(statErr) {
		creds, err := LoadDefaultCredentials()
		if creds != nil {
			t.Errorf("expected nil creds for missing file, got %v", creds)
		}
		if err != nil {
			t.Errorf("expected nil error for missing file, got %v", err)
		}
	}
}

func TestClaudeCredentialsJSON_ParsesCorrectly(t *testing.T) {
	jsonData := `{"claudeAiOauth":{"accessToken":"test-token","refreshToken":"test-refresh","expiresAt":1234567890,"subscriptionType":"pro"}}`

	var cf claudeCredentialsJSON
	if err := json.Unmarshal([]byte(jsonData), &cf); err != nil {
		t.Fatalf("unmarshal: %v", err)
	}

	if cf.ClaudeAiOauth.AccessToken != "test-token" {
		t.Errorf("AccessToken = %q, want test-token", cf.ClaudeAiOauth.AccessToken)
	}
	if cf.ClaudeAiOauth.RefreshToken != "test-refresh" {
		t.Errorf("RefreshToken = %q, want test-refresh", cf.ClaudeAiOauth.RefreshToken)
	}
	if cf.ClaudeAiOauth.ExpiresAt != 1234567890 {
		t.Errorf("ExpiresAt = %d, want 1234567890", cf.ClaudeAiOauth.ExpiresAt)
	}
	if cf.ClaudeAiOauth.SubscriptionType != "pro" {
		t.Errorf("SubscriptionType = %q, want pro", cf.ClaudeAiOauth.SubscriptionType)
	}
}

func TestClaudeCredentialsJSON_EmptyAccessToken(t *testing.T) {
	jsonData := `{"claudeAiOauth":{"accessToken":"","refreshToken":"r","expiresAt":1}}`

	var cf claudeCredentialsJSON
	if err := json.Unmarshal([]byte(jsonData), &cf); err != nil {
		t.Fatalf("unmarshal: %v", err)
	}
	if cf.ClaudeAiOauth.AccessToken != "" {
		t.Errorf("expected empty access token")
	}
}