/*
 * 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.parts.automation;


import net.minecraft.entity.player.EntityPlayer;
import net.minecraft.item.ItemStack;
import net.minecraft.util.EnumHand;
import net.minecraft.util.math.Vec3d;

import appeng.api.AEApi;
import appeng.api.config.Actionable;
import appeng.api.config.FuzzyMode;
import appeng.api.config.PowerMultiplier;
import appeng.api.config.RedstoneMode;
import appeng.api.config.Settings;
import appeng.api.config.Upgrades;
import appeng.api.networking.IGridNode;
import appeng.api.networking.energy.IEnergyGrid;
import appeng.api.networking.energy.IEnergySource;
import appeng.api.networking.security.BaseActionSource;
import appeng.api.networking.security.MachineSource;
import appeng.api.networking.ticking.TickRateModulation;
import appeng.api.networking.ticking.TickingRequest;
import appeng.api.parts.IPartCollisionHelper;
import appeng.api.storage.IMEInventory;
import appeng.api.storage.IMEMonitor;
import appeng.api.storage.data.IAEItemStack;
import appeng.core.settings.TickRates;
import appeng.core.sync.GuiBridge;
import appeng.helpers.Reflected;
import appeng.me.GridAccessException;
import appeng.util.InventoryAdaptor;
import appeng.util.Platform;
import appeng.util.inv.IInventoryDestination;
import appeng.util.item.AEItemStack;


public class PartImportBus extends PartSharedItemBus implements IInventoryDestination
{
	private final BaseActionSource source;
	private IMEInventory<IAEItemStack> destination = null;
	private IAEItemStack lastItemChecked = null;
	private int itemToSend; // used in tickingRequest
	private boolean worked; // used in tickingRequest

	@Reflected
	public PartImportBus( final ItemStack is )
	{
		super( is );

		this.getConfigManager().registerSetting( Settings.REDSTONE_CONTROLLED, RedstoneMode.IGNORE );
		this.getConfigManager().registerSetting( Settings.FUZZY_MODE, FuzzyMode.IGNORE_ALL );
		this.source = new MachineSource( this );
	}

	@Override
	public boolean canInsert( final ItemStack stack )
	{
		if( stack == null || stack.getItem() == null )
		{
			return false;
		}

		final IAEItemStack out = this.destination.injectItems( this.lastItemChecked = AEApi.instance().storage().createItemStack( stack ), Actionable.SIMULATE, this.source );
		if( out == null )
		{
			return true;
		}
		return out.getStackSize() != stack.stackSize;
	}

	@Override
	public void getBoxes( final IPartCollisionHelper bch )
	{
		bch.addBox( 6, 6, 11, 10, 10, 13 );
		bch.addBox( 5, 5, 13, 11, 11, 14 );
		bch.addBox( 4, 4, 14, 12, 12, 16 );
	}

	@Override
	public int getCableConnectionLength()
	{
		return 5;
	}

	@Override
	public boolean onPartActivate( final EntityPlayer player, final EnumHand hand, final Vec3d pos )
	{
		if( !player.isSneaking() )
		{
			if( Platform.isClient() )
			{
				return true;
			}

			Platform.openGUI( player, this.getHost().getTile(), this.getSide(), GuiBridge.GUI_BUS );
			return true;
		}

		return false;
	}

	@Override
	public TickingRequest getTickingRequest( final IGridNode node )
	{
		return new TickingRequest( TickRates.ImportBus.getMin(), TickRates.ImportBus.getMax(), this.getHandler() == null, false );
	}

	@Override
	public TickRateModulation tickingRequest( final IGridNode node, final int ticksSinceLastCall )
	{
		return this.doBusWork();
	}

	@Override
	protected TickRateModulation doBusWork()
	{
		if( !this.getProxy().isActive() || !this.canDoBusWork() )
		{
			return TickRateModulation.IDLE;
		}

		this.worked = false;

		final InventoryAdaptor myAdaptor = this.getHandler();
		final FuzzyMode fzMode = (FuzzyMode) this.getConfigManager().getSetting( Settings.FUZZY_MODE );

		if( myAdaptor != null )
		{
			try
			{
				this.itemToSend = this.calculateItemsToSend();
				this.itemToSend = Math.min( this.itemToSend, (int) ( 0.01 + this.getProxy().getEnergy().extractAEPower( this.itemToSend, Actionable.SIMULATE, PowerMultiplier.CONFIG ) ) );

				final IMEMonitor<IAEItemStack> inv = this.getProxy().getStorage().getItemInventory();
				final IEnergyGrid energy = this.getProxy().getEnergy();

				boolean Configured = false;
				for( int x = 0; x < this.availableSlots(); x++ )
				{
					final IAEItemStack ais = this.getConfig().getAEStackInSlot( x );
					if( ais != null && this.itemToSend > 0 )
					{
						Configured = true;
						while( this.itemToSend > 0 )
						{
							if( this.importStuff( myAdaptor, ais, inv, energy, fzMode ) )
							{
								break;
							}
						}
					}
				}

				if( !Configured )
				{
					while( this.itemToSend > 0 )
					{
						if( this.importStuff( myAdaptor, null, inv, energy, fzMode ) )
						{
							break;
						}
					}
				}
			}
			catch( final GridAccessException e )
			{
				// :3
			}
		}
		else
		{
			return TickRateModulation.SLEEP;
		}

		return this.worked ? TickRateModulation.FASTER : TickRateModulation.SLOWER;
	}

	private boolean importStuff( final InventoryAdaptor myAdaptor, final IAEItemStack whatToImport, final IMEMonitor<IAEItemStack> inv, final IEnergySource energy, final FuzzyMode fzMode )
	{
		final int toSend = this.calculateMaximumAmountToImport( myAdaptor, whatToImport, inv, fzMode );
		final ItemStack newItems;

		if( this.getInstalledUpgrades( Upgrades.FUZZY ) > 0 )
		{
			newItems = myAdaptor.removeSimilarItems( toSend, whatToImport == null ? null : whatToImport.getItemStack(), fzMode, this.configDestination( inv ) );
		}
		else
		{
			newItems = myAdaptor.removeItems( toSend, whatToImport == null ? null : whatToImport.getItemStack(), this.configDestination( inv ) );
		}

		if( newItems != null )
		{
			newItems.stackSize = (int) ( Math.min( newItems.stackSize, energy.extractAEPower( newItems.stackSize, Actionable.SIMULATE, PowerMultiplier.CONFIG ) ) + 0.01 );
			this.itemToSend -= newItems.stackSize;

			if( this.lastItemChecked == null || !this.lastItemChecked.isSameType( newItems ) )
			{
				this.lastItemChecked = AEApi.instance().storage().createItemStack( newItems );
			}
			else
			{
				this.lastItemChecked.setStackSize( newItems.stackSize );
			}

			final IAEItemStack failed = Platform.poweredInsert( energy, this.destination, this.lastItemChecked, this.source );

			if( failed != null )
			{
				myAdaptor.addItems( failed.getItemStack() );
				return true;
			}
			else
			{
				this.worked = true;
			}
		}
		else
		{
			return true;
		}

		return false;
	}

	private int calculateMaximumAmountToImport( final InventoryAdaptor myAdaptor, final IAEItemStack whatToImport, final IMEMonitor<IAEItemStack> inv, final FuzzyMode fzMode )
	{
		final int toSend = Math.min( this.itemToSend, 64 );
		final ItemStack itemStackToImport;

		if( whatToImport == null )
		{
			itemStackToImport = null;
		}
		else
		{
			itemStackToImport = whatToImport.getItemStack();
		}

		final IAEItemStack itemAmountNotStorable;
		final ItemStack simResult;
		if( this.getInstalledUpgrades( Upgrades.FUZZY ) > 0 )
		{
			simResult = myAdaptor.simulateSimilarRemove( toSend, itemStackToImport, fzMode, this.configDestination( inv ) );
			itemAmountNotStorable = this.destination.injectItems( AEItemStack.create( simResult ), Actionable.SIMULATE, this.source );
		}
		else
		{
			simResult = myAdaptor.simulateRemove( toSend, itemStackToImport, this.configDestination( inv ) );
			itemAmountNotStorable = this.destination.injectItems( AEItemStack.create( simResult ), Actionable.SIMULATE, this.source );
		}

		if( itemAmountNotStorable != null )
		{
			return (int) Math.min( simResult.stackSize - itemAmountNotStorable.getStackSize(), toSend );
		}

		return toSend;
	}

	private IInventoryDestination configDestination( final IMEMonitor<IAEItemStack> itemInventory )
	{
		this.destination = itemInventory;
		return this;
	}

	@Override
	protected boolean isSleeping()
	{
		return this.getHandler() == null || super.isSleeping();
	}

	@Override
	public RedstoneMode getRSMode()
	{
		return (RedstoneMode) this.getConfigManager().getSetting( Settings.REDSTONE_CONTROLLED );
	}
}