/*
 * 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.DamageSource;
import net.minecraft.util.math.AxisAlignedBB;
import net.minecraft.world.World;
import net.minecraftforge.oredict.OreDictionary;

import appeng.api.AEApi;
import appeng.api.definitions.IMaterials;
import appeng.core.AEConfig;
import appeng.core.features.AEFeature;
import appeng.helpers.Reflected;
import appeng.util.Platform;


public final class EntitySingularity extends AEBaseEntityItem
{

	private static int randTickSeed = 0;

	@Reflected
	public EntitySingularity( final World w )
	{
		super( w );
	}

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

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

		return super.attackEntityFrom( src, dmg );
	}

	private void doExplosion()
	{
		if( Platform.isClient() )
		{
			return;
		}

		if( !AEConfig.instance().isFeatureEnabled( AEFeature.IN_WORLD_SINGULARITY ) )
		{
			return;
		}

		final ItemStack item = this.getEntityItem();

		final IMaterials materials = AEApi.instance().definitions().materials();

		if( materials.singularity().isSameAs( item ) )
		{
			final AxisAlignedBB region = new AxisAlignedBB( this.posX - 4, this.posY - 4, this.posZ - 4, this.posX + 4, this.posY + 4, this.posZ + 4 );
			final List<Entity> l = this.getCheckedEntitiesWithinAABBExcludingEntity( region );

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

						// check... other name.
						if( !matches )
						{
							for( final 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();
								}

								materials.qESingularity().maybeStack( 2 ).ifPresent( singularityStack ->
								{
									final NBTTagCompound cmp = Platform.openNbtData( singularityStack );
									cmp.setLong( "freq", ( new Date() ).getTime() * 100 + ( randTickSeed ) % 100 );
									randTickSeed++;
									item.stackSize--;

									final EntitySingularity entity = new EntitySingularity( this.worldObj, this.posX, this.posY, this.posZ, singularityStack );
									this.worldObj.spawnEntityInWorld( entity );
								} );
							}

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