package net.minecraft.world.inventory;

import net.minecraft.world.Container;
import net.minecraft.world.SimpleContainer;
import net.minecraft.world.entity.player.Inventory;
import net.minecraft.world.entity.player.Player;
import net.minecraft.world.item.ItemStack;

public class DispenserMenu extends AbstractContainerMenu {
	private static final int SLOT_COUNT = 9;
	private static final int INV_SLOT_START = 9;
	private static final int INV_SLOT_END = 36;
	private static final int USE_ROW_SLOT_START = 36;
	private static final int USE_ROW_SLOT_END = 45;
	private final Container dispenser;

	public DispenserMenu(final int containerId, final Inventory inventory) {
		this(containerId, inventory, new SimpleContainer(9));
	}

	public DispenserMenu(final int containerId, final Inventory inventory, final Container dispenser) {
		super(MenuType.GENERIC_3x3, containerId);
		checkContainerSize(dispenser, 9);
		this.dispenser = dispenser;
		dispenser.startOpen(inventory.player);
		this.add3x3GridSlots(dispenser, 62, 17);
		this.addStandardInventorySlots(inventory, 8, 84);
	}

	protected void add3x3GridSlots(final Container container, final int left, final int top) {
		for (int y = 0; y < 3; y++) {
			for (int x = 0; x < 3; x++) {
				int slot = x + y * 3;
				this.addSlot(new Slot(container, slot, left + x * 18, top + y * 18));
			}
		}
	}

	@Override
	public boolean stillValid(final Player player) {
		return this.dispenser.stillValid(player);
	}

	@Override
	public ItemStack quickMoveStack(final Player player, final int slotIndex) {
		ItemStack clicked = ItemStack.EMPTY;
		Slot slot = this.slots.get(slotIndex);
		if (slot != null && slot.hasItem()) {
			ItemStack stack = slot.getItem();
			clicked = stack.copy();
			if (slotIndex < 9) {
				if (!this.moveItemStackTo(stack, 9, 45, true)) {
					return ItemStack.EMPTY;
				}
			} else if (!this.moveItemStackTo(stack, 0, 9, false)) {
				return ItemStack.EMPTY;
			}

			if (stack.isEmpty()) {
				slot.setByPlayer(ItemStack.EMPTY);
			} else {
				slot.setChanged();
			}

			if (stack.getCount() == clicked.getCount()) {
				return ItemStack.EMPTY;
			}

			slot.onTake(player, stack);
		}

		return clicked;
	}

	@Override
	public void removed(final Player player) {
		super.removed(player);
		this.dispenser.stopOpen(player);
	}
}