ChanceCondition.java

/*
 * Copyright (C) 2004-2014 L2J Server
 * 
 * This file is part of L2J Server.
 * 
 * L2J Server 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.
 * 
 * L2J Server 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 com.l2jserver.gameserver.model;

import java.util.Arrays;
import java.util.logging.Level;
import java.util.logging.Logger;

import com.l2jserver.gameserver.enums.TriggerType;
import com.l2jserver.gameserver.model.skills.Skill;
import com.l2jserver.util.Rnd;

/**
 * @author kombat
 */
public final class ChanceCondition
{
	private static final Logger _log = Logger.getLogger(ChanceCondition.class.getName());
	
	public static final int EVT_HIT = 1;
	public static final int EVT_CRIT = 2;
	public static final int EVT_CAST = 4;
	public static final int EVT_PHYSICAL = 8;
	public static final int EVT_MAGIC = 16;
	public static final int EVT_MAGIC_GOOD = 32;
	public static final int EVT_MAGIC_OFFENSIVE = 64;
	public static final int EVT_ATTACKED = 128;
	public static final int EVT_ATTACKED_HIT = 256;
	public static final int EVT_ATTACKED_CRIT = 512;
	public static final int EVT_HIT_BY_SKILL = 1024;
	public static final int EVT_HIT_BY_OFFENSIVE_SKILL = 2048;
	public static final int EVT_HIT_BY_GOOD_MAGIC = 4096;
	public static final int EVT_EVADED_HIT = 8192;
	public static final int EVT_ON_START = 16384;
	public static final int EVT_ON_ACTION_TIME = 32768;
	public static final int EVT_ON_EXIT = 65536;
	
	private final TriggerType _triggerType;
	private final int _chance;
	private final int _mindmg;
	private final byte[] _elements;
	private final int[] _activationSkills;
	private final boolean _pvpOnly;
	
	private ChanceCondition(TriggerType trigger, int chance, int mindmg, byte[] elements, int[] activationSkills, boolean pvpOnly)
	{
		_triggerType = trigger;
		_chance = chance;
		_mindmg = mindmg;
		_elements = elements;
		_pvpOnly = pvpOnly;
		_activationSkills = activationSkills;
	}
	
	public static ChanceCondition parse(StatsSet set)
	{
		try
		{
			TriggerType trigger = set.getEnum("chanceType", TriggerType.class, null);
			int chance = set.getInt("activationChance", -1);
			int mindmg = set.getInt("activationMinDamage", -1);
			String elements = set.getString("activationElements", null);
			String activationSkills = set.getString("activationSkills", null);
			boolean pvpOnly = set.getBoolean("pvpChanceOnly", false);
			
			if (trigger != null)
			{
				return new ChanceCondition(trigger, chance, mindmg, parseElements(elements), parseActivationSkills(activationSkills), pvpOnly);
			}
		}
		catch (Exception e)
		{
			_log.log(Level.WARNING, "", e);
		}
		return null;
	}
	
	public static ChanceCondition parse(String chanceType, int chance, int mindmg, String elements, String activationSkills, boolean pvpOnly)
	{
		try
		{
			if (chanceType == null)
			{
				return null;
			}
			
			TriggerType trigger = Enum.valueOf(TriggerType.class, chanceType);
			
			if (trigger != null)
			{
				return new ChanceCondition(trigger, chance, mindmg, parseElements(elements), parseActivationSkills(activationSkills), pvpOnly);
			}
		}
		catch (Exception e)
		{
			_log.log(Level.WARNING, "", e);
		}
		
		return null;
	}
	
	public static final byte[] parseElements(String list)
	{
		if (list == null)
		{
			return null;
		}
		
		String[] valuesSplit = list.split(",");
		byte[] elements = new byte[valuesSplit.length];
		for (int i = 0; i < valuesSplit.length; i++)
		{
			elements[i] = Byte.parseByte(valuesSplit[i]);
		}
		
		Arrays.sort(elements);
		return elements;
	}
	
	public static final int[] parseActivationSkills(String list)
	{
		if (list == null)
		{
			return null;
		}
		
		String[] valuesSplit = list.split(",");
		int[] skillIds = new int[valuesSplit.length];
		for (int i = 0; i < valuesSplit.length; i++)
		{
			skillIds[i] = Integer.parseInt(valuesSplit[i]);
		}
		
		return skillIds;
	}
	
	public boolean trigger(int event, int damage, byte element, boolean playable, Skill skill)
	{
		if (_pvpOnly && !playable)
		{
			return false;
		}
		
		if ((_elements != null) && (Arrays.binarySearch(_elements, element) < 0))
		{
			return false;
		}
		
		if ((_activationSkills != null) && (skill != null) && (Arrays.binarySearch(_activationSkills, skill.getId()) < 0))
		{
			return false;
		}
		
		// if the skill has "activationMinDamage" setted to higher than -1(default)
		// and if "activationMinDamage" is still higher than the recieved damage, the skill wont trigger
		if ((_mindmg > -1) && (_mindmg > damage))
		{
			return false;
		}
		
		return _triggerType.check(event) && ((_chance < 0) || (Rnd.get(100) < _chance));
	}
	
	@Override
	public String toString()
	{
		return "Trigger[" + _chance + ";" + _triggerType.toString() + "]";
	}
}