/*
 * This file is part of aion-unique <aion-unique.com>.
 *
 *  aion-unique 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.
 *
 *  aion-unique 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 aion-unique.  If not, see <http://www.gnu.org/licenses/>.
 */
package com.aionemu.gameserver.skillengine;

import com.aionemu.gameserver.dataholders.DataManager;
import com.aionemu.gameserver.model.gameobjects.Creature;
import com.aionemu.gameserver.model.gameobjects.VisibleObject;
import com.aionemu.gameserver.model.gameobjects.player.Player;
import com.aionemu.gameserver.skillengine.model.ActivationAttribute;
import com.aionemu.gameserver.skillengine.model.Skill;
import com.aionemu.gameserver.skillengine.model.SkillTemplate;

/**
 * @author ATracer
 *
 */
public class SkillEngine
{	
	public static final SkillEngine skillEngine = new SkillEngine();
	
	/**
	 * should not be instantiated directly
	 */
	private SkillEngine()
	{	
		
	}
	
	/**
	 *  This method is used for skills that were learned by player
	 *  
	 * @param player
	 * @param skillId
	 * @return Skill
	 */
	public Skill getSkillFor(Player player, int skillId, VisibleObject firstTarget)
	{
		SkillTemplate template = DataManager.SKILL_DATA.getSkillTemplate(skillId);
		
		if(template == null)
			return null;
		
		// player doesn't have such skill and ist not provoked
		if(template.getActivationAttribute() != ActivationAttribute.PROVOKED)
		{
			if(!player.getSkillList().isSkillPresent(skillId))
				return null;
		}
		
		
		Creature target = null;
		if(firstTarget instanceof Creature)
			target = (Creature) firstTarget;

		return new Skill(template, player, target);
	}
	
	/**
	 *  This method is used for not learned skills (item skills etc)
	 *  
	 * @param creature
	 * @param skillId
	 * @param skillLevel
	 * @return Skill
	 */
	public Skill getSkill(Creature creature, int skillId, int skillLevel, VisibleObject firstTarget)
	{
		SkillTemplate template = DataManager.SKILL_DATA.getSkillTemplate(skillId);
		
		if(template == null)
			return null;
		
		Creature target = null;
		if(firstTarget instanceof Creature)
			target = (Creature) firstTarget;
		return new Skill(template, creature, skillLevel, target);
	}

	public static SkillEngine getInstance()
	{
		return skillEngine;
	}
}