package appeng.bootstrap;


import java.util.ArrayList;
import java.util.Collections;
import java.util.EnumSet;
import java.util.List;
import java.util.function.BiConsumer;
import java.util.function.Function;
import java.util.function.Supplier;

import net.minecraft.block.Block;
import net.minecraft.creativetab.CreativeTabs;
import net.minecraft.item.Item;
import net.minecraft.item.ItemBlock;
import net.minecraftforge.fml.common.registry.GameRegistry;
import net.minecraftforge.fml.relauncher.Side;
import net.minecraftforge.fml.relauncher.SideOnly;

import appeng.api.definitions.IBlockDefinition;
import appeng.block.AEBaseBlock;
import appeng.block.AEBaseItemBlock;
import appeng.block.AEBaseTileBlock;
import appeng.core.AEConfig;
import appeng.core.AppEng;
import appeng.core.CreativeTab;
import appeng.core.features.AEFeature;
import appeng.core.features.ActivityState;
import appeng.core.features.BlockDefinition;
import appeng.core.features.BlockStackSrc;
import appeng.core.features.TileDefinition;
import appeng.tile.AEBaseTile;
import appeng.util.Platform;


class BlockDefinitionBuilder implements IBlockBuilder
{

	private final FeatureFactory factory;

	private final String registryName;

	private final Supplier<? extends Block> blockSupplier;

	private final List<BiConsumer<Block, Item>> preInitCallbacks = new ArrayList<>();

	private final List<BiConsumer<Block, Item>> initCallbacks = new ArrayList<>();

	private final List<BiConsumer<Block, Item>> postInitCallbacks = new ArrayList<>();

	private final EnumSet<AEFeature> features = EnumSet.noneOf( AEFeature.class );

	private CreativeTabs creativeTab = CreativeTab.instance;

	private Function<Block, ItemBlock> itemFactory;

	@SideOnly( Side.CLIENT )
	private BlockRendering blockRendering;

	@SideOnly( Side.CLIENT )
	private ItemRendering itemRendering;

	BlockDefinitionBuilder( FeatureFactory factory, String id, Supplier<? extends Block> blockSupplier )
	{
		this.factory = factory;
		this.registryName = id;
		this.blockSupplier = blockSupplier;

		if( Platform.isClient() )
		{
			blockRendering = new BlockRendering();
			itemRendering = new ItemRendering();
		}
	}

	@Override
	public BlockDefinitionBuilder preInit( BiConsumer<Block, Item> callback )
	{
		preInitCallbacks.add( callback );
		return this;
	}

	@Override
	public BlockDefinitionBuilder init( BiConsumer<Block, Item> callback )
	{
		initCallbacks.add( callback );
		return this;
	}

	@Override
	public BlockDefinitionBuilder postInit( BiConsumer<Block, Item> callback )
	{
		postInitCallbacks.add( callback );
		return this;
	}

	@Override
	public IBlockBuilder features( AEFeature... features )
	{
		this.features.clear();
		addFeatures( features );
		return this;
	}

	@Override
	public IBlockBuilder addFeatures( AEFeature... features )
	{
		Collections.addAll( this.features, features );
		return this;
	}

	public BlockDefinitionBuilder rendering( BlockRenderingCustomizer callback )
	{
		if( Platform.isClient() )
		{
			customizeForClient( callback );
		}

		return this;
	}

	@Override
	public IBlockBuilder item( Function<Block, ItemBlock> factory )
	{
		this.itemFactory = factory;
		return this;
	}

	@SideOnly( Side.CLIENT )
	private void customizeForClient( BlockRenderingCustomizer callback )
	{
		callback.customize( blockRendering, itemRendering );
	}

	@SuppressWarnings( "unchecked" )
	@Override
	public <T extends IBlockDefinition> T build()
	{
		if( !AEConfig.instance.areFeaturesEnabled( features ) )
		{
			return (T) new TileDefinition( registryName, null, null );
		}

		// Create block and matching item, and set factory name of both
		Block block = blockSupplier.get();
		block.setRegistryName( AppEng.MOD_ID, registryName );

		ItemBlock item = constructItemFromBlock( block );
		item.setRegistryName( AppEng.MOD_ID, registryName );

		// Register the item and block with the game
		factory.addPreInit( side ->
		{
			GameRegistry.register( block );
			GameRegistry.register( item );
		} );

		block.setCreativeTab( creativeTab );
		block.setUnlocalizedName( "appliedenergistics2." + registryName );

		// Register all extra handlers
		preInitCallbacks.forEach( consumer -> factory.addPreInit( side -> consumer.accept( block, item ) ) );
		initCallbacks.forEach( consumer -> factory.addInit( side -> consumer.accept( block, item ) ) );
		postInitCallbacks.forEach( consumer -> factory.addPostInit( side -> consumer.accept( block, item ) ) );

		if( Platform.isClient() )
		{
			if( block instanceof AEBaseTileBlock )
			{
				AEBaseTileBlock tileBlock = (AEBaseTileBlock) block;
				blockRendering.apply( factory, block, tileBlock.getTileEntityClass() );
			}
			else
			{
				blockRendering.apply( factory, block, null );
			}

			itemRendering.apply( factory, item );
		}

		if( block instanceof AEBaseTileBlock )
		{
			AEBaseTileBlock tileBlock = (AEBaseTileBlock) block;

			factory.addPreInit( side ->
			{
				Class<? extends AEBaseTile> tileEntityClass = tileBlock.getTileEntityClass();
				AEBaseTile.registerTileItem( tileEntityClass, new BlockStackSrc( block, 0, ActivityState.Enabled ) );

				GameRegistry.registerTileEntity( tileEntityClass, registryName );
			} );

			return (T) new TileDefinition( registryName, (AEBaseTileBlock) block, item );
		}
		else
		{
			return (T) new BlockDefinition( registryName, block, item );
		}
	}

	private ItemBlock constructItemFromBlock( Block block )
	{
		if( itemFactory != null )
		{
			return itemFactory.apply( block );
		}
		else if( block instanceof AEBaseBlock )
		{
			return new AEBaseItemBlock( block );
		}
		else
		{
			return new ItemBlock( block );
		}
	}
}