/*
 * Copyright (c) 2013 L2jMobius
 * 
 * Permission is hereby granted, free of charge, to any person obtaining a copy
 * of this software and associated documentation files (the "Software"), to deal
 * in the Software without restriction, including without limitation the rights
 * to use, copy, modify, merge, publish, distribute, sublicense, and/or sell
 * copies of the Software, and to permit persons to whom the Software is
 * furnished to do so, subject to the following conditions:
 * 
 * The above copyright notice and this permission notice shall be
 * included in all copies or substantial portions of the Software.
 * 
 * THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR
 * IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,
 * FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL THE
 * AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER LIABILITY,
 * WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM, OUT OF OR
 * IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN THE SOFTWARE.
 */
package org.l2jmobius.gameserver.taskmanagers;

import java.util.Map;
import java.util.Map.Entry;
import java.util.concurrent.ConcurrentHashMap;

import org.l2jmobius.commons.threads.ThreadPool;
import org.l2jmobius.commons.util.Rnd;
import org.l2jmobius.gameserver.config.GeneralConfig;
import org.l2jmobius.gameserver.entity.actor.Npc;

/**
 * @author Mobius
 */
public class RandomAnimationTaskManager implements Runnable
{
	private static final Map<Npc, Long> PENDING_ANIMATIONS = new ConcurrentHashMap<>();
	private static boolean _working = false;
	
	protected RandomAnimationTaskManager()
	{
		ThreadPool.scheduleAtFixedRate(this, 0, 1000);
	}
	
	@Override
	public void run()
	{
		if (_working)
		{
			return;
		}
		
		_working = true;
		
		final long currentTime = System.currentTimeMillis();
		for (Entry<Npc, Long> entry : PENDING_ANIMATIONS.entrySet())
		{
			if (currentTime > entry.getValue().longValue())
			{
				final Npc npc = entry.getKey();
				if (npc.isInActiveRegion() && !npc.isDead() && !npc.isInCombat() && !npc.isMoving() && !npc.isStunned() && !npc.isSleeping() && !npc.isParalyzed())
				{
					npc.onRandomAnimation(Rnd.get(2, 3));
				}
				
				PENDING_ANIMATIONS.put(npc, currentTime + (Rnd.get((npc.isAttackable() ? GeneralConfig.MIN_MONSTER_ANIMATION : GeneralConfig.MIN_NPC_ANIMATION), (npc.isAttackable() ? GeneralConfig.MAX_MONSTER_ANIMATION : GeneralConfig.MAX_NPC_ANIMATION)) * 1000));
			}
		}
		
		_working = false;
	}
	
	public void add(Npc npc)
	{
		if (npc.hasRandomAnimation())
		{
			PENDING_ANIMATIONS.putIfAbsent(npc, System.currentTimeMillis() + (Rnd.get((npc.isAttackable() ? GeneralConfig.MIN_MONSTER_ANIMATION : GeneralConfig.MIN_NPC_ANIMATION), (npc.isAttackable() ? GeneralConfig.MAX_MONSTER_ANIMATION : GeneralConfig.MAX_NPC_ANIMATION)) * 1000));
		}
	}
	
	public void remove(Npc npc)
	{
		PENDING_ANIMATIONS.remove(npc);
	}
	
	public static RandomAnimationTaskManager getInstance()
	{
		return SingletonHolder.INSTANCE;
	}
	
	private static class SingletonHolder
	{
		protected static final RandomAnimationTaskManager INSTANCE = new RandomAnimationTaskManager();
	}
}
