package org.bukkit.event.player;

import org.bukkit.Material;
import org.bukkit.block.Block;
import org.bukkit.block.BlockFace;
import org.bukkit.entity.Player;
import org.bukkit.event.Cancellable;
import org.bukkit.event.HandlerList;
import org.bukkit.event.block.Action;
import org.bukkit.inventory.ItemStack;

/**
 * Called when a player interacts with an object or air.
 */
public class PlayerInteractEvent extends PlayerEvent implements Cancellable
{
	private static final HandlerList handlers = new HandlerList();
	protected ItemStack item;
	protected Action action;
	protected Block blockClicked;
	protected BlockFace blockFace;
	private Result useClickedBlock;
	private Result useItemInHand;

	public PlayerInteractEvent(final Player who, final Action action, final ItemStack item, final Block clickedBlock, final BlockFace clickedFace)
	{
		super(who);
		this.action = action;
		this.item = item;
		this.blockClicked = clickedBlock;
		this.blockFace = clickedFace;

		useItemInHand = Result.DEFAULT;
		useClickedBlock = clickedBlock == null ? Result.DENY : Result.ALLOW;
	}

	/**
	 * Returns the action type
	 *
	 * @return Action returns the type of interaction
	 */
	public Action getAction()
	{
		return action;
	}

	/**
	 * Gets the cancellation state of this event. Set to true if you want to
	 * prevent buckets from placing water and so forth
	 *
	 * @return boolean cancellation state
	 */
	public boolean isCancelled()
	{
		return useInteractedBlock() == Result.DENY;
	}

	/**
	 * Sets the cancellation state of this event. A canceled event will not be
	 * executed in the server, but will still pass to other plugins
	 * <p>
	 * Canceling this event will prevent use of food (player won't lose the
	 * food item), prevent bows/snowballs/eggs from firing, etc. (player won't
	 * lose the ammo)
	 *
	 * @param cancel true if you wish to cancel this event
	 */
	public void setCancelled(boolean cancel)
	{
		setUseInteractedBlock(cancel ? Result.DENY : useInteractedBlock() == Result.DENY ? Result.DEFAULT : useInteractedBlock());
		setUseItemInHand(cancel ? Result.DENY : useItemInHand() == Result.DENY ? Result.DEFAULT : useItemInHand());
	}

	/**
	 * Returns the item in hand represented by this event
	 *
	 * @return ItemStack the item used
	 */
	public ItemStack getItem()
	{
		return this.item;
	}

	/**
	 * Convenience method. Returns the material of the item represented by
	 * this event
	 *
	 * @return Material the material of the item used
	 */
	public Material getMaterial()
	{
		if(!hasItem())
		{
			return Material.AIR;
		}

		return item.getType();
	}

	/**
	 * Check if this event involved a block
	 *
	 * @return boolean true if it did
	 */
	public boolean hasBlock()
	{
		return this.blockClicked != null;
	}

	/**
	 * Check if this event involved an item
	 *
	 * @return boolean true if it did
	 */
	public boolean hasItem()
	{
		return this.item != null;
	}

	/**
	 * Convenience method to inform the user whether this was a block
	 * placement event.
	 *
	 * @return boolean true if the item in hand was a block
	 */
	public boolean isBlockInHand()
	{
		if(!hasItem())
		{
			return false;
		}

		return item.getType().isBlock();
	}

	/**
	 * Returns the clicked block
	 *
	 * @return Block returns the block clicked with this item.
	 */
	public Block getClickedBlock()
	{
		return blockClicked;
	}

	/**
	 * Returns the face of the block that was clicked
	 *
	 * @return BlockFace returns the face of the block that was clicked
	 */
	public BlockFace getBlockFace()
	{
		return blockFace;
	}

	/**
	 * This controls the action to take with the block (if any) that was
	 * clicked on. This event gets processed for all blocks, but most don't
	 * have a default action
	 *
	 * @return the action to take with the interacted block
	 */
	public Result useInteractedBlock()
	{
		return useClickedBlock;
	}

	/**
	 * @param useInteractedBlock the action to take with the interacted block
	 */
	public void setUseInteractedBlock(Result useInteractedBlock)
	{
		this.useClickedBlock = useInteractedBlock;
	}

	/**
	 * This controls the action to take with the item the player is holding.
	 * This includes both blocks and items (such as flint and steel or
	 * records). When this is set to default, it will be allowed if no action
	 * is taken on the interacted block.
	 *
	 * @return the action to take with the item in hand
	 */
	public Result useItemInHand()
	{
		return useItemInHand;
	}

	/**
	 * @param useItemInHand the action to take with the item in hand
	 */
	public void setUseItemInHand(Result useItemInHand)
	{
		this.useItemInHand = useItemInHand;
	}

	@Override
	public HandlerList getHandlers()
	{
		return handlers;
	}

	public static HandlerList getHandlerList()
	{
		return handlers;
	}
}