/*
 *   This file is part of Skript.
 *
 *  Skript 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.
 *
 *  Skript 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 Skript.  If not, see <http://www.gnu.org/licenses/>.
 * 
 * 
 * Copyright 2011, 2012 Peter Güttinger
 * 
 */

package ch.njol.skript.conditions;

import org.bukkit.entity.Entity;
import org.bukkit.event.Event;
import org.eclipse.jdt.annotation.Nullable;

import ch.njol.skript.Skript;
import ch.njol.skript.doc.Description;
import ch.njol.skript.doc.Examples;
import ch.njol.skript.doc.Name;
import ch.njol.skript.doc.Since;
import ch.njol.skript.entity.EntityData;
import ch.njol.skript.lang.Condition;
import ch.njol.skript.lang.Expression;
import ch.njol.skript.lang.SkriptParser.ParseResult;
import ch.njol.util.Checker;
import ch.njol.util.Kleenean;

/**
 * @author Peter Güttinger
 */
@Name("Is Riding")
@Description("Tests whether an entity is riding another or is in a vehicle.")
@Examples({"player is riding a saddled pig"})
@Since("2.0")
public class CondIsRiding extends Condition {
	static {
		Skript.registerCondition(CondIsRiding.class,
				"%entities% (is|are) riding [%entitydatas%]",
				"%entities% (isn't|is not|aren't|are not) riding [%entitydatas%]");
	}
	
	@SuppressWarnings("null")
	private Expression<Entity> entities;
	@SuppressWarnings("null")
	Expression<EntityData<?>> types;
	
	@SuppressWarnings({"unchecked", "null"})
	@Override
	public boolean init(final Expression<?>[] exprs, final int matchedPattern, final Kleenean isDelayed, final ParseResult parseResult) {
		entities = (Expression<Entity>) exprs[0];
		types = (Expression<EntityData<?>>) exprs[1];
		setNegated(matchedPattern == 1);
		return true;
	}
	
	@Override
	public boolean check(final Event e) {
		return entities.check(e, new Checker<Entity>() {
			@Override
			public boolean check(final Entity en) {
				return types.check(e, new Checker<EntityData<?>>() {
					@Override
					public boolean check(final EntityData<?> d) {
						return d.isInstance(en.getVehicle());
					}
				}, isNegated());
			}
		});
	}
	
	@Override
	public String toString(final @Nullable Event e, final boolean debug) {
		return entities.toString(e, debug) + (isNegated() ? " is" : " isn't") + " riding" + types.toString(e, debug);
	}
	
}