/*
 * This file is part of Applied Energistics 2.
 * Copyright (c) 2013 - 2014, AlgorithmX2, All rights reserved.
 *
 * Applied Energistics 2 is free software: you can redistribute it and/or modify
 * it under the terms of the GNU Lesser General Public License as published by
 * the Free Software Foundation, either version 3 of the License, or
 * (at your option) any later version.
 *
 * Applied Energistics 2 is distributed in the hope that it will be useful,
 * but WITHOUT ANY WARRANTY; without even the implied warranty of
 * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
 * GNU Lesser General Public License for more details.
 *
 * You should have received a copy of the GNU Lesser General Public License
 * along with Applied Energistics 2.  If not, see <http://www.gnu.org/licenses/lgpl>.
 */

package appeng.block.networking;


import appeng.block.AEBaseTileBlock;
import appeng.tile.networking.TileController;
import net.minecraft.block.Block;
import net.minecraft.block.material.Material;
import net.minecraft.block.properties.IProperty;
import net.minecraft.block.properties.PropertyEnum;
import net.minecraft.block.state.BlockStateContainer;
import net.minecraft.block.state.IBlockState;
import net.minecraft.util.BlockRenderLayer;
import net.minecraft.util.IStringSerializable;
import net.minecraft.util.math.BlockPos;
import net.minecraft.world.IBlockAccess;
import net.minecraft.world.World;

import javax.annotation.Nonnull;


public class BlockController extends AEBaseTileBlock {

    public enum ControllerBlockState implements IStringSerializable {
        offline, online, conflicted;

        @Override
        public String getName() {
            return this.name();
        }

    }

    /**
     * Controls the rendering of the controller block (connected texture style).
     * inside_a and inside_b are alternating patterns for a controller that is enclosed by other controllers,
     * and since they are always offline, they do not have the usual sub-states.
     */
    public enum ControllerRenderType implements IStringSerializable {
        block, column_x, column_y, column_z, inside_a, inside_b;

        @Override
        public String getName() {
            return this.name();
        }

    }

    public static final PropertyEnum<ControllerBlockState> CONTROLLER_STATE = PropertyEnum.create("state", ControllerBlockState.class);

    public static final PropertyEnum<ControllerRenderType> CONTROLLER_TYPE = PropertyEnum.create("type", ControllerRenderType.class);

    public BlockController() {
        super(Material.IRON);
        this.setHardness(6);
        this.setDefaultState(this.getDefaultState()
                .withProperty(CONTROLLER_STATE, ControllerBlockState.offline)
                .withProperty(CONTROLLER_TYPE, ControllerRenderType.block));
    }

    @Override
    protected IProperty[] getAEStates() {
        return new IProperty[]{CONTROLLER_STATE, CONTROLLER_TYPE};
    }

    @Override
    protected BlockStateContainer createBlockState() {
        return new BlockStateContainer(this, this.getAEStates());
    }

    /**
     * This will compute the AE_BLOCK_FORWARD, AE_BLOCK_UP and CONTROLLER_TYPE block states based on adjacent
     * controllers and the network state of this controller (offline, online, conflicted). This is used to
     * get a rudimentary connected texture feel for the controller based on how it is placed.
     */
    @Override
    public IBlockState getActualState(IBlockState state, IBlockAccess world, BlockPos pos) {

        // Only used for columns, really
        ControllerRenderType type = ControllerRenderType.block;

        int x = pos.getX();
        int y = pos.getY();
        int z = pos.getZ();

        // Detect whether controllers are on both sides of the x, y, and z axes
        final boolean xx = this.getTileEntity(world, x - 1, y, z) instanceof TileController && this.getTileEntity(world, x + 1, y,
                z) instanceof TileController;
        final boolean yy = this.getTileEntity(world, x, y - 1, z) instanceof TileController && this.getTileEntity(world, x, y + 1,
                z) instanceof TileController;
        final boolean zz = this.getTileEntity(world, x, y, z - 1) instanceof TileController && this.getTileEntity(world, x, y,
                z + 1) instanceof TileController;

        if (xx && !yy && !zz) {
            type = ControllerRenderType.column_x;
        } else if (!xx && yy && !zz) {
            type = ControllerRenderType.column_y;
        } else if (!xx && !yy && zz) {
            type = ControllerRenderType.column_z;
        } else if ((xx ? 1 : 0) + (yy ? 1 : 0) + (zz ? 1 : 0) >= 2) {
            final int v = (Math.abs(x) + Math.abs(y) + Math.abs(z)) % 2;

            // While i'd like this to be based on the blockstate randomization feature, this generates
            // an alternating pattern based on world position, so this is not 100% doable with blockstates.
            if (v == 0) {
                type = ControllerRenderType.inside_a;
            } else {
                type = ControllerRenderType.inside_b;
            }
        }

        return state.withProperty(CONTROLLER_TYPE, type);
    }

    @Override
    public IBlockState getExtendedState(IBlockState state, IBlockAccess world, BlockPos pos) {
        return state;
    }

    @Override
    public int getMetaFromState(final IBlockState state) {
        return state.getValue(CONTROLLER_STATE).ordinal();
    }

    @Override
    public IBlockState getStateFromMeta(final int meta) {
        ControllerBlockState state = ControllerBlockState.values()[meta];
        return this.getDefaultState().withProperty(CONTROLLER_STATE, state);
    }

    @Override
    public BlockRenderLayer getRenderLayer() {
        return BlockRenderLayer.CUTOUT;
    }

    @Override
    public void neighborChanged(IBlockState state, World world, BlockPos pos, Block blockIn, BlockPos fromPos) {
        final TileController tc = this.getTileEntity(world, pos);
        if (tc != null) {
            tc.onNeighborChange(false);
        }
    }
}