/* This file is part of Project-Zed. Project-Zed is free software: you can redistribute it and/or modify it under the terms of the GNU General Public 
* License as published by the Free Software Foundation, either version 3 of the License, or (at your option) any later version. Project-Zed 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 General Public License for more details. You should have received a copy of the GNU General Public License along 
* with Project-Zed. If not, see <http://www.gnu.org/licenses/>
*/
package com.projectzed.mod.container;

import com.projectzed.mod.tileentity.machine.TileEntityIndustrialLoader;
import net.minecraft.entity.player.EntityPlayer;
import net.minecraft.entity.player.InventoryPlayer;
import net.minecraft.inventory.Container;
import net.minecraft.inventory.Slot;
import net.minecraft.item.ItemStack;

/**
 * Container class for industrialLoader.
 * 
 * @author hockeyhurd
 * @version Apr 23, 2015
 */
public class ContainerLoader extends Container {

	private final TileEntityIndustrialLoader te;
	
	public ContainerLoader(InventoryPlayer inv, TileEntityIndustrialLoader te) {
		this.te = te;
		addSlots(inv, te);
	}
	
	/**
	 * Adds all slots, player and container.
	 * 
	 * @param inv inventory.
	 * @param te tile entity object.
	 */
	protected void addSlots(InventoryPlayer inv, TileEntityIndustrialLoader te) {
		// Adds the player inventory to furnace's gui.
		for (int y = 0; y < 3; y++) {
			for (int x = 0; x < 9; x++) {
				this.addSlotToContainer(new Slot(inv, x + y * 9 + 9, 8 + x * 18, 84 + y * 18));
			}
		}

		// Adds the player hotbar slots to the gui.
		for (int i = 0; i < 9; i++) {
			this.addSlotToContainer(new Slot(inv, i, 8 + i * 18, 142)); // 198
		}
	}

	/*
	 * (non-Javadoc)
	 * @see net.minecraft.inventory.Container#canInteractWith(net.minecraft.entity.player.EntityPlayer)
	 */
	@Override
	public boolean canInteractWith(EntityPlayer player) {
		return true;
	}

	/**
	 * Player shift-clicking a slot.
	 * @see net.minecraft.inventory.Container#transferStackInSlot(net.minecraft.entity.player.EntityPlayer, int)
	 */
	@Override
	public ItemStack transferStackInSlot(EntityPlayer player, int index) {
		ItemStack stack = null;
		Slot slot = (Slot) this.inventorySlots.get(index);
		if (slot != null && slot.getHasStack()) {
			ItemStack slotStack = slot.getStack();
			stack = slotStack.copy();
			if (index < te.getSizeInventory()) {
				if (!this.mergeItemStack(slotStack, te.getSizeInventory(), this.inventorySlots.size(), false)) return null;
			}
			
			else {
				if (!this.getSlot(0).isItemValid(slotStack) || !this.mergeItemStack(slotStack, 0, te.getSizeInventory(), false)) return null;
			}

			if (slotStack.stackSize == 0) slot.putStack((ItemStack) null);
			else slot.onSlotChanged();

			if (slotStack.stackSize == stack.stackSize) return null;
			slot.onPickupFromSlot(player, slotStack);
		}

		return stack;
	}
	
}