/*
 * 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.util;


import java.util.ArrayList;

import net.minecraft.entity.player.EntityPlayer;
import net.minecraft.inventory.IInventory;
import net.minecraft.inventory.ISidedInventory;
import net.minecraft.item.ItemStack;
import net.minecraft.tileentity.TileEntityChest;
import net.minecraft.util.EnumFacing;
import net.minecraftforge.common.capabilities.ICapabilityProvider;
import net.minecraftforge.items.CapabilityItemHandler;
import net.minecraftforge.items.IItemHandler;

import appeng.api.config.FuzzyMode;
import appeng.util.inv.AdaptorIInventory;
import appeng.util.inv.AdaptorItemHandler;
import appeng.util.inv.AdaptorList;
import appeng.util.inv.AdaptorPlayerInventory;
import appeng.util.inv.IInventoryDestination;
import appeng.util.inv.ItemSlot;
import appeng.util.inv.WrapperMCISidedInventory;


/**
 * Universal Facade for other inventories. Used to conveniently interact with various types of inventories. This is not used for
 * actually monitoring an inventory. It is just for insertion and extraction, and is primarily used by import/export buses.
 */
public abstract class InventoryAdaptor implements Iterable<ItemSlot>
{

	// returns an appropriate adaptor, or null
	public static InventoryAdaptor getAdaptor( final Object te, final EnumFacing d )
	{
		if( te == null )
		{
			return null;
		}

		if ( te instanceof ICapabilityProvider )
		{
			ICapabilityProvider capProvider = (ICapabilityProvider) te;

			// Attempt getting an IItemHandler for the given side via caps
			IItemHandler itemHandler = capProvider.getCapability( CapabilityItemHandler.ITEM_HANDLER_CAPABILITY, d );
			if( itemHandler != null && itemHandler.getSlots() > 0 )
			{
				return new AdaptorItemHandler( itemHandler );
			}
		}

		if( te instanceof EntityPlayer )
		{
			return new AdaptorIInventory( new AdaptorPlayerInventory( ( (EntityPlayer) te ).inventory, false ) );
		}
		else if( te instanceof ArrayList )
		{
			@SuppressWarnings( "unchecked" )
			final ArrayList<ItemStack> list = (ArrayList<ItemStack>) te;

			return new AdaptorList( list );
		}
		else if( te instanceof TileEntityChest )
		{
			return new AdaptorIInventory( Platform.GetChestInv( te ) );
		}
		else if( te instanceof ISidedInventory )
		{
			final ISidedInventory si = (ISidedInventory) te;
			final int[] slots = si.getSlotsForFace( d );
			if( si.getSizeInventory() > 0 && slots != null && slots.length > 0 )
			{
				return new AdaptorIInventory( new WrapperMCISidedInventory( si, d ) );
			}
		}
		else if( te instanceof IInventory )
		{
			final IInventory i = (IInventory) te;
			if( i.getSizeInventory() > 0 )
			{
				return new AdaptorIInventory( i );
			}
		}

		return null;
	}

	// return what was extracted.
	public abstract ItemStack removeItems( int amount, ItemStack filter, IInventoryDestination destination );

	public abstract ItemStack simulateRemove( int amount, ItemStack filter, IInventoryDestination destination );

	// return what was extracted.
	public abstract ItemStack removeSimilarItems( int amount, ItemStack filter, FuzzyMode fuzzyMode, IInventoryDestination destination );

	public abstract ItemStack simulateSimilarRemove( int amount, ItemStack filter, FuzzyMode fuzzyMode, IInventoryDestination destination );

	// return what isn't used...
	public abstract ItemStack addItems( ItemStack toBeAdded );

	public abstract ItemStack simulateAdd( ItemStack toBeSimulated );

	public abstract boolean containsItems();
}