/*
 * 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 com.l2jmobius.gameserver;

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

import com.l2jmobius.Config;
import com.l2jmobius.gameserver.enums.ItemLocation;
import com.l2jmobius.gameserver.instancemanager.ItemsOnGroundManager;
import com.l2jmobius.gameserver.model.L2World;
import com.l2jmobius.gameserver.model.items.instance.L2ItemInstance;

public final class ItemsAutoDestroy
{
	private final Map<Integer, L2ItemInstance> _items = new ConcurrentHashMap<>();
	
	protected ItemsAutoDestroy()
	{
		ThreadPoolManager.getInstance().scheduleGeneralAtFixedRate(this::removeItems, 5000, 5000);
	}
	
	public static ItemsAutoDestroy getInstance()
	{
		return SingletonHolder._instance;
	}
	
	public synchronized void addItem(L2ItemInstance item)
	{
		item.setDropTime(System.currentTimeMillis());
		_items.put(item.getObjectId(), item);
	}
	
	public synchronized void removeItems()
	{
		final long curtime = System.currentTimeMillis();
		for (L2ItemInstance item : _items.values())
		{
			if (item == null)
			{
				continue;
			}
			
			if ((item.getDropTime() == 0) || (item.getItemLocation() != ItemLocation.VOID))
			{
				_items.remove(item.getObjectId());
			}
			else if (item.getItem().getAutoDestroyTime() > 0)
			{
				if ((curtime - item.getDropTime()) > item.getItem().getAutoDestroyTime())
				{
					L2World.getInstance().removeVisibleObject(item, item.getWorldRegion());
					L2World.getInstance().removeObject(item);
					_items.remove(item.getObjectId());
					if (Config.SAVE_DROPPED_ITEM)
					{
						ItemsOnGroundManager.getInstance().removeObject(item);
					}
				}
			}
			else if (item.getItem().hasExImmediateEffect() && ((curtime - item.getDropTime()) > Config.HERB_AUTO_DESTROY_TIME))
			{
				L2World.getInstance().removeVisibleObject(item, item.getWorldRegion());
				L2World.getInstance().removeObject(item);
				_items.remove(item.getObjectId());
				if (Config.SAVE_DROPPED_ITEM)
				{
					ItemsOnGroundManager.getInstance().removeObject(item);
				}
			}
			else if ((curtime - item.getDropTime()) > ((Config.AUTODESTROY_ITEM_AFTER == 0) ? 3600000 : Config.AUTODESTROY_ITEM_AFTER * 1000))
			{
				L2World.getInstance().removeVisibleObject(item, item.getWorldRegion());
				L2World.getInstance().removeObject(item);
				_items.remove(item.getObjectId());
				if (Config.SAVE_DROPPED_ITEM)
				{
					ItemsOnGroundManager.getInstance().removeObject(item);
				}
			}
		}
	}
	
	private static class SingletonHolder
	{
		protected static final ItemsAutoDestroy _instance = new ItemsAutoDestroy();
	}
}