/*
 * This file is part of the L2J Mobius project.
 * 
 * This program 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.
 * 
 * This program 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 this program. If not, see <http://www.gnu.org/licenses/>.
 */
package handlers.effecthandlers;

import java.util.logging.Level;

import com.l2jmobius.commons.util.Rnd;
import com.l2jmobius.gameserver.data.xml.impl.SkillData;
import com.l2jmobius.gameserver.handler.TargetHandler;
import com.l2jmobius.gameserver.model.L2Object;
import com.l2jmobius.gameserver.model.StatsSet;
import com.l2jmobius.gameserver.model.actor.L2Character;
import com.l2jmobius.gameserver.model.effects.AbstractEffect;
import com.l2jmobius.gameserver.model.events.EventType;
import com.l2jmobius.gameserver.model.events.impl.character.OnCreatureSkillFinishCast;
import com.l2jmobius.gameserver.model.events.listeners.ConsumerEventListener;
import com.l2jmobius.gameserver.model.holders.SkillHolder;
import com.l2jmobius.gameserver.model.skills.BuffInfo;
import com.l2jmobius.gameserver.model.skills.Skill;
import com.l2jmobius.gameserver.model.skills.SkillCaster;
import com.l2jmobius.gameserver.model.skills.targets.TargetType;

/**
 * Trigger Skill By Skill effect implementation.
 * @author Zealar
 */
public final class TriggerSkillBySkill extends AbstractEffect
{
	private final int _castSkillId;
	private final int _chance;
	private final SkillHolder _skill;
	private final int _skillLevelScaleTo;
	private final TargetType _targetType;
	
	public TriggerSkillBySkill(StatsSet params)
	{
		_castSkillId = params.getInt("castSkillId", 0);
		_chance = params.getInt("chance", 100);
		_skill = new SkillHolder(params.getInt("skillId", 0), params.getInt("skillLevel", 0));
		_skillLevelScaleTo = params.getInt("skillLevelScaleTo", 0);
		_targetType = params.getEnum("targetType", TargetType.class, TargetType.TARGET);
	}
	
	@Override
	public void onStart(L2Character effector, L2Character effected, Skill skill)
	{
		effected.addListener(new ConsumerEventListener(effected, EventType.ON_CREATURE_SKILL_FINISH_CAST, (OnCreatureSkillFinishCast event) -> onSkillUseEvent(event), this));
	}
	
	@Override
	public void onExit(BuffInfo info)
	{
		info.getEffected().removeListenerIf(EventType.ON_CREATURE_SKILL_FINISH_CAST, listener -> listener.getOwner() == this);
	}
	
	public void onSkillUseEvent(OnCreatureSkillFinishCast event)
	{
		if ((_chance == 0) || ((_skill.getSkillId() == 0) || (_skill.getSkillLvl() == 0) || (_castSkillId == 0)))
		{
			return;
		}
		
		if (_castSkillId != event.getSkill().getId())
		{
			return;
		}
		
		if (!event.getTarget().isCharacter())
		{
			return;
		}
		
		if ((_chance < 100) && (Rnd.get(100) > _chance))
		{
			return;
		}
		
		final Skill triggerSkill;
		if (_skillLevelScaleTo <= 0)
		{
			triggerSkill = _skill.getSkill();
		}
		else
		{
			final BuffInfo buffInfo = ((L2Character) event.getTarget()).getEffectList().getBuffInfoBySkillId(_skill.getSkillId());
			if (buffInfo != null)
			{
				triggerSkill = SkillData.getInstance().getSkill(_skill.getSkillId(), Math.min(_skillLevelScaleTo, buffInfo.getSkill().getLevel() + 1));
			}
			else
			{
				triggerSkill = _skill.getSkill();
			}
		}
		
		L2Object target = null;
		try
		{
			target = TargetHandler.getInstance().getHandler(_targetType).getTarget(event.getCaster(), event.getTarget(), triggerSkill, false, false, false);
		}
		catch (Exception e)
		{
			_log.log(Level.WARNING, "Exception in ITargetTypeHandler.getTarget(): " + e.getMessage(), e);
		}
		
		if ((target != null) && target.isCharacter())
		{
			SkillCaster.triggerCast(event.getCaster(), (L2Character) target, triggerSkill);
		}
	}
}