/*
 * This file is part of Applied Energistics 2.
 * Copyright (c) 2013 - 2015, 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.facade;


import javax.annotation.Nullable;

import net.minecraft.block.state.IBlockState;
import net.minecraft.entity.Entity;
import net.minecraft.entity.EntityLivingBase;
import net.minecraft.init.Blocks;
import net.minecraft.item.Item;
import net.minecraft.item.ItemStack;

import appeng.api.AEApi;
import appeng.api.parts.IBoxProvider;
import appeng.api.parts.IFacadePart;
import appeng.api.parts.IPartCollisionHelper;
import appeng.api.util.AEPartLocation;


public class FacadePart implements IFacadePart, IBoxProvider
{

	private final ItemStack facade;
	private final AEPartLocation side;

	public FacadePart( final ItemStack facade, final AEPartLocation side )
	{
		if( facade == null )
		{
			throw new IllegalArgumentException( "Facade Part constructed on null item." );
		}
		this.facade = facade.copy();
		this.facade.stackSize = 1;
		this.side = side;
	}

	public static boolean isFacade( final ItemStack is )
	{
		return is.getItem() instanceof IFacadeItem;
	}

	@Override
	public ItemStack getItemStack()
	{
		return this.facade;
	}

	@Override
	public void getBoxes( final IPartCollisionHelper ch, final Entity e )
	{
		if( e instanceof EntityLivingBase )
		{
			// prevent weird snag behavior
			ch.addBox( 0.0, 0.0, 14, 16.0, 16.0, 16.0 );
		}
		else
		{
			// the box is 15.9 for transition planes to pick up collision events.
			ch.addBox( 0.0, 0.0, 14, 16.0, 16.0, 15.9 );
		}
	}

	@Override
	public AEPartLocation getSide()
	{
		return this.side;
	}

	@Override
	public Item getItem()
	{
		final ItemStack is = this.getTextureItem();
		if( is == null )
		{
			return null;
		}
		return is.getItem();
	}

	@Override
	public int getItemDamage()
	{
		final ItemStack is = this.getTextureItem();
		if( is == null )
		{
			return 0;
		}
		return is.getItemDamage();
	}

	@Override
	public boolean notAEFacade()
	{
		return !( this.facade.getItem() instanceof IFacadeItem );
	}

	@Override
	public boolean isTransparent()
	{
		if( AEApi.instance().partHelper().getCableRenderMode().transparentFacades )
		{
			return true;
		}

		return this.getBlockState().isOpaqueCube();
	}

	@Nullable
	@Override
	public ItemStack getTextureItem()
	{
		final Item maybeFacade = this.facade.getItem();

		// AE Facade
		if( maybeFacade instanceof IFacadeItem )
		{
			final IFacadeItem facade = (IFacadeItem) maybeFacade;

			return facade.getTextureItem( this.facade );
		}

		return null;
	}

	@Override
	public IBlockState getBlockState()
	{
		final Item maybeFacade = this.facade.getItem();

		// AE Facade
		if( maybeFacade instanceof IFacadeItem )
		{
			final IFacadeItem facade = (IFacadeItem) maybeFacade;

			return facade.getTextureBlockState( this.facade );
		}

		return Blocks.GLASS.getDefaultState();
	}

	@Override
	public void getBoxes( final IPartCollisionHelper bch )
	{
		this.getBoxes( bch, null );
	}
}