package org.bukkit.event.player;

import org.apache.commons.lang.Validate;
import org.bukkit.Warning;
import org.bukkit.entity.Player;
import org.bukkit.event.Cancellable;
import org.bukkit.event.HandlerList;

import java.util.HashSet;
import java.util.Set;

/**
 * Holds information for player chat and commands
 *
 * This event will fire from the main thread and allows the use of
 * all of the Bukkit API, unlike the {@link AsyncPlayerChatEvent}.
 * <p>
 * Listening to this event forces chat to wait for the main thread which
 * causes delays for chat. {@link AsyncPlayerChatEvent} is the encouraged
 * alternative for thread safe implementations.
 */
@Warning(reason = "Listening to this event forces chat to wait for the main thread, delaying chat messages.")
public class PlayerChatEvent extends PlayerEvent implements Cancellable
{
	private static final HandlerList handlers = new HandlerList();
	private boolean cancel = false;
	private String message;
	private String format;
	private final Set<Player> recipients;

	public PlayerChatEvent(final Player player, final String message)
	{
		super(player);
		this.message = message;
		this.format = "<%1$s> %2$s";
		this.recipients = new HashSet<Player>(player.getServer().getOnlinePlayers());
	}

	public PlayerChatEvent(final Player player, final String message, final String format, final Set<Player> recipients)
	{
		super(player);
		this.message = message;
		this.format = format;
		this.recipients = recipients;
	}

	public boolean isCancelled()
	{
		return cancel;
	}

	public void setCancelled(boolean cancel)
	{
		this.cancel = cancel;
	}

	/**
	 * Gets the message that the player is attempting to send
	 *
	 * @return Message the player is attempting to send
	 */
	public String getMessage()
	{
		return message;
	}

	/**
	 * Sets the message that the player will send
	 *
	 * @param message New message that the player will send
	 */
	public void setMessage(String message)
	{
		this.message = message;
	}

	/**
	 * Sets the player that this message will display as, or command will be
	 * executed as
	 *
	 * @param player New player which this event will execute as
	 */
	public void setPlayer(final Player player)
	{
		Validate.notNull(player, "Player cannot be null");
		this.player = player;
	}

	/**
	 * Gets the format to use to display this chat message
	 *
	 * @return String.Format compatible format string
	 */
	public String getFormat()
	{
		return format;
	}

	/**
	 * Sets the format to use to display this chat message
	 *
	 * @param format String.Format compatible format string
	 */
	public void setFormat(final String format)
	{
		// Oh for a better way to do this!
		try
		{
			String.format(format, player, message);
		} catch(RuntimeException ex)
		{
			ex.fillInStackTrace();
			throw ex;
		}

		this.format = format;
	}

	/**
	 * Gets a set of recipients that this chat message will be displayed to
	 *
	 * @return All Players who will see this chat message
	 */
	public Set<Player> getRecipients()
	{
		return recipients;
	}

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

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