/*
 * 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.entity;


import java.util.Date;
import java.util.List;

import net.minecraft.entity.Entity;
import net.minecraft.entity.item.EntityItem;
import net.minecraft.item.ItemStack;
import net.minecraft.nbt.NBTTagCompound;
import net.minecraft.util.AxisAlignedBB;
import net.minecraft.util.DamageSource;
import net.minecraft.world.World;
import net.minecraftforge.oredict.OreDictionary;

import appeng.api.AEApi;
import appeng.core.AEConfig;
import appeng.core.features.AEFeature;
import appeng.util.Platform;


final public class EntitySingularity extends AEBaseEntityItem
{

	static private int randTickSeed = 0;

	public EntitySingularity( World w )
	{
		super( w );
	}

	public EntitySingularity( World w, double x, double y, double z, ItemStack is )
	{
		super( w, x, y, z, is );
	}

	@Override
	public boolean attackEntityFrom( DamageSource src, float dmg )
	{
		if ( src.isExplosion() )
		{
			doExplosion();
			return false;
		}

		return super.attackEntityFrom( src, dmg );
	}

	public void doExplosion()
	{
		if ( Platform.isClient() )
			return;

		if ( !AEConfig.instance.isFeatureEnabled( AEFeature.inWorldSingularity ) )
			return;

		ItemStack item = getEntityItem();
		if ( AEApi.instance().materials().materialSingularity.sameAsStack( item ) )
		{
			AxisAlignedBB region = AxisAlignedBB.getBoundingBox( posX - 4, posY - 4, posZ - 4, posX + 4, posY + 4, posZ + 4 );
			List<Entity> l = this.getCheckedEntitiesWithinAABBExcludingEntity( region );

			for ( Entity e : l )
			{
				if ( e instanceof EntityItem )
				{
					ItemStack other = ( ( EntityItem ) e ).getEntityItem();
					if ( other != null )
					{
						boolean matches = false;
						for ( ItemStack is : OreDictionary.getOres( "dustEnder" ) )
						{
							if ( OreDictionary.itemMatches( other, is, false ) )
							{
								matches = true;
								break;
							}
						}

						// check... other name.
						if ( !matches )
						{
							for ( ItemStack is : OreDictionary.getOres( "dustEnderPearl" ) )
							{
								if ( OreDictionary.itemMatches( other, is, false ) )
								{
									matches = true;
									break;
								}
							}
						}

						if ( matches )
						{
							while ( item.stackSize > 0 && other.stackSize > 0 )
							{
								other.stackSize--;
								if ( other.stackSize == 0 )
									e.setDead();

								ItemStack Output = AEApi.instance().materials().materialQESingularity.stack( 2 );
								NBTTagCompound cmp = Platform.openNbtData( Output );
								cmp.setLong( "freq", ( new Date() ).getTime() * 100 + ( randTickSeed++ ) % 100 );
								item.stackSize--;

								worldObj.spawnEntityInWorld( new EntitySingularity( worldObj, posX, posY, posZ, Output ) );
							}

							if ( item.stackSize <= 0 )
								setDead();
						}
					}
				}
			}
		}
	}
}