/*
 * 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.container.slot;


import javax.annotation.Nonnull;

import net.minecraft.entity.player.EntityPlayer;
import net.minecraft.inventory.IInventory;
import net.minecraft.inventory.InventoryBasic;
import net.minecraft.inventory.Slot;
import net.minecraft.item.ItemStack;
import net.minecraftforge.fml.relauncher.Side;
import net.minecraftforge.fml.relauncher.SideOnly;
import net.minecraftforge.items.IItemHandler;

import appeng.container.AEBaseContainer;
import appeng.util.helpers.ItemHandlerUtil;


public class AppEngSlot extends Slot
{
	private static IInventory emptyInventory = new InventoryBasic( "[Null]", true, 0 );
	private final IItemHandler itemHandler;
	private final int index;

	private final int defX;
	private final int defY;
	private boolean isDraggable = true;
	private boolean isPlayerSide = false;
	private AEBaseContainer myContainer = null;
	private int IIcon = -1;
	private hasCalculatedValidness isValid;
	private boolean isDisplay = false;

	public AppEngSlot( final IItemHandler inv, final int idx, final int x, final int y )
	{
		super( emptyInventory, idx, x, y );
		this.itemHandler = inv;
		this.index = idx;

		this.defX = x;
		this.defY = y;
		this.setIsValid( hasCalculatedValidness.NotAvailable );
	}

	public Slot setNotDraggable()
	{
		this.setDraggable( false );
		return this;
	}

	public Slot setPlayerSide()
	{
		this.isPlayerSide = true;
		return this;
	}

	public String getTooltip()
	{
		return null;
	}

	public void clearStack()
	{
		ItemHandlerUtil.setStackInSlot( this.itemHandler, this.index, ItemStack.EMPTY );
	}

	@Override
	public boolean isItemValid( @Nonnull final ItemStack par1ItemStack )
	{
		if( this.isSlotEnabled() )
		{
			return this.itemHandler.isItemValid( this.index, par1ItemStack );
		}
		return false;
	}

	@Override
	@Nonnull
	public ItemStack getStack()
	{
		if( !this.isSlotEnabled() )
		{
			return ItemStack.EMPTY;
		}

		if( this.itemHandler.getSlots() <= this.getSlotIndex() )
		{
			return ItemStack.EMPTY;
		}

		if( this.isDisplay() )
		{
			this.setDisplay( false );
			return this.getDisplayStack();
		}

		return this.itemHandler.getStackInSlot( this.index );
	}

	@Override
	public void putStack( final ItemStack stack )
	{
		if( this.isSlotEnabled() )
		{
			ItemHandlerUtil.setStackInSlot( this.itemHandler, this.index, stack );

			if( this.getContainer() != null )
			{
				this.getContainer().onSlotChange( this );
			}
		}
	}

	public IItemHandler getItemHandler()
	{
		return this.itemHandler;
	}

	@Override
	public void onSlotChanged()
	{
		this.setIsValid( hasCalculatedValidness.NotAvailable );
		if( this.isSlotEnabled() )
		{
			ItemHandlerUtil.setStackInSlot( this.itemHandler, this.index, this.getStack().copy() );

			if( this.getContainer() != null )
			{
				this.getContainer().onSlotChange( this );
			}
		}
	}

	@Override
	public int getSlotStackLimit()
	{
		return this.itemHandler.getSlotLimit( this.index );
	}

	@Override
	public int getItemStackLimit( @Nonnull ItemStack stack )
	{
		return Math.min( this.getSlotStackLimit(), stack.getMaxStackSize() );
	}

	@Override
	public boolean canTakeStack( final EntityPlayer par1EntityPlayer )
	{
		if( this.isSlotEnabled() )
		{
			return !this.itemHandler.extractItem( this.index, Integer.MAX_VALUE, true ).isEmpty();
		}
		return false;
	}

	@Override
	@Nonnull
	public ItemStack decrStackSize( int amount )
	{
		return this.itemHandler.extractItem( this.index, amount, false );
	}

	@Override
	public boolean isSameInventory( Slot other )
	{
		return other instanceof AppEngSlot && ( (AppEngSlot) other ).itemHandler == this.itemHandler;
	}

	@Override
	@SideOnly( Side.CLIENT )
	public boolean isEnabled()
	{
		return this.isSlotEnabled();
	}

	public boolean isSlotEnabled()
	{
		return true;
	}

	public ItemStack getDisplayStack()
	{
		return this.itemHandler.getStackInSlot( this.index );
	}

	public float getOpacityOfIcon()
	{
		return 0.4f;
	}

	public boolean renderIconWithItem()
	{
		return false;
	}

	public int getIcon()
	{
		return this.getIIcon();
	}

	public boolean isPlayerSide()
	{
		return this.isPlayerSide;
	}

	public boolean shouldDisplay()
	{
		return this.isSlotEnabled();
	}

	public int getX()
	{
		return this.defX;
	}

	public int getY()
	{
		return this.defY;
	}

	private int getIIcon()
	{
		return this.IIcon;
	}

	public void setIIcon( final int iIcon )
	{
		this.IIcon = iIcon;
	}

	private boolean isDisplay()
	{
		return this.isDisplay;
	}

	public void setDisplay( final boolean isDisplay )
	{
		this.isDisplay = isDisplay;
	}

	public boolean isDraggable()
	{
		return this.isDraggable;
	}

	private void setDraggable( final boolean isDraggable )
	{
		this.isDraggable = isDraggable;
	}

	void setPlayerSide( final boolean isPlayerSide )
	{
		this.isPlayerSide = isPlayerSide;
	}

	public hasCalculatedValidness getIsValid()
	{
		return this.isValid;
	}

	public void setIsValid( final hasCalculatedValidness isValid )
	{
		this.isValid = isValid;
	}

	protected AEBaseContainer getContainer()
	{
		return this.myContainer;
	}

	public void setContainer( final AEBaseContainer myContainer )
	{
		this.myContainer = myContainer;
	}

	public enum hasCalculatedValidness
	{
		NotAvailable, Valid, Invalid
	}
}