/*
 * 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.debug;


import java.util.EnumSet;

import javax.annotation.Nullable;

import com.google.common.math.IntMath;

import net.minecraft.tileentity.TileEntity;
import net.minecraft.util.EnumFacing;
import net.minecraft.util.ITickable;
import net.minecraftforge.common.capabilities.Capability;
import net.minecraftforge.energy.CapabilityEnergy;
import net.minecraftforge.energy.IEnergyStorage;

import appeng.tile.AEBaseTile;


public class TileEnergyGenerator extends AEBaseTile implements ITickable, IEnergyStorage
{
	/**
	 * The base energy injected each tick.
	 * Adjacent TileEnergyGenerators will increase it to pow(base, #generators).
	 */
	private static final int BASE_ENERGY = 8;

	@Override
	public void update()
	{
		int tier = 1;
		final EnumSet<EnumFacing> validEnergyReceivers = EnumSet.noneOf( EnumFacing.class );

		for( EnumFacing facing : EnumFacing.values() )
		{
			final TileEntity te = this.getWorld().getTileEntity( this.getPos().offset( facing ) );

			if( te instanceof TileEnergyGenerator )
			{
				tier++;
			}

			if( te != null && te.hasCapability( CapabilityEnergy.ENERGY, facing.getOpposite() ) )
			{
				validEnergyReceivers.add( facing );
			}

		}

		final int energyToInsert = IntMath.pow( BASE_ENERGY, tier );

		for( EnumFacing facing : validEnergyReceivers )
		{
			final TileEntity te = this.getWorld().getTileEntity( this.getPos().offset( facing ) );
			final IEnergyStorage cap = te.getCapability( CapabilityEnergy.ENERGY, facing.getOpposite() );

			if( cap.canReceive() )
			{

				cap.receiveEnergy( energyToInsert, false );
			}
		}
	}

	@Override
	public boolean hasCapability( Capability<?> capability, @Nullable EnumFacing facing )
	{
		if( capability == CapabilityEnergy.ENERGY )
		{
			return true;
		}
		return super.hasCapability( capability, facing );
	}

	@Override
	@Nullable
	public <T> T getCapability( Capability<T> capability, @Nullable EnumFacing facing )
	{
		if( capability == CapabilityEnergy.ENERGY )
		{
			return (T) this;
		}
		return super.getCapability( capability, facing );
	}

	@Override
	public int receiveEnergy( int maxReceive, boolean simulate )
	{
		return 0;
	}

	@Override
	public int extractEnergy( int maxExtract, boolean simulate )
	{
		return maxExtract;
	}

	@Override
	public int getEnergyStored()
	{
		return Integer.MAX_VALUE;
	}

	@Override
	public int getMaxEnergyStored()
	{
		return Integer.MAX_VALUE;
	}

	@Override
	public boolean canExtract()
	{
		return true;
	}

	@Override
	public boolean canReceive()
	{
		return false;
	}
}