/*
 * Copyright (C) 2004-2013 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.actor.knownlist;

import java.util.ArrayList;
import java.util.Collection;
import java.util.Collections;
import java.util.Iterator;
import java.util.List;
import java.util.Map;

import javolution.util.FastList;
import javolution.util.FastMap;

import com.l2jserver.gameserver.model.L2Object;
import com.l2jserver.gameserver.model.actor.L2Character;
import com.l2jserver.gameserver.model.actor.L2Summon;
import com.l2jserver.gameserver.model.actor.instance.L2PcInstance;
import com.l2jserver.gameserver.util.Util;

public class CharKnownList extends ObjectKnownList
{
	private FastMap<Integer, L2PcInstance> _knownPlayers;
	private FastMap<Integer, L2Summon> _knownSummons;
	private FastMap<Integer, Integer> _knownRelations;
	
	public CharKnownList(L2Character activeChar)
	{
		super(activeChar);
	}
	
	@Override
	public boolean addKnownObject(L2Object object)
	{
		if (!super.addKnownObject(object))
		{
			return false;
		}
		else if (object.isPlayer())
		{
			getKnownPlayers().put(object.getObjectId(), object.getActingPlayer());
			getKnownRelations().put(object.getObjectId(), -1);
		}
		else if (object.isSummon())
		{
			getKnownSummons().put(object.getObjectId(), (L2Summon) object);
		}
		
		return true;
	}
	
	/**
	 * @param player The L2PcInstance to search in _knownPlayer
	 * @return {@code true} if the player is in _knownPlayer of the character, {@code false} otherwise
	 */
	public final boolean knowsThePlayer(L2PcInstance player)
	{
		return (getActiveChar() == player) || getKnownPlayers().containsKey(player.getObjectId());
	}
	
	/** Remove all L2Object from _knownObjects and _knownPlayer of the L2Character then cancel Attack or Cast and notify AI. */
	@Override
	public final void removeAllKnownObjects()
	{
		super.removeAllKnownObjects();
		getKnownPlayers().clear();
		getKnownRelations().clear();
		getKnownSummons().clear();
		
		final L2Character activeChar = getActiveChar();
		
		// Set _target of the L2Character to null
		// Cancel Attack or Cast
		activeChar.setTarget(null);
		
		// Cancel AI Task
		if (activeChar.hasAI())
		{
			//[JOJO]-------------------------------------------------
			// for ai.individual.Benom
			if (!activeChar.isDead() && activeChar.isVisible() && activeChar.getAI().getNextAction() != null)
			{
				return;
			}
			//-------------------------------------------------------
			activeChar.setAI(null);
		}
	}
	
	@Override
	protected boolean removeKnownObject(L2Object object, boolean forget)
	{
		if (!super.removeKnownObject(object, forget))
		{
			return false;
		}
		
		if (!forget) // on forget objects removed by iterator
		{
			if (object.isPlayer())
			{
				getKnownPlayers().remove(object.getObjectId());
				getKnownRelations().remove(object.getObjectId());
			}
			else if (object.isSummon())
			{
				getKnownSummons().remove(object.getObjectId());
			}
		}
		
		// If object is targeted by the L2Character, cancel Attack or Cast
		if (object == getActiveChar().getTarget())
		{
			getActiveChar().setTarget(null);
		}
		
		return true;
	}
	
	@Override
	public void forgetObjects(boolean fullCheck)
	{
		if (!fullCheck)
		{
			final Collection<L2PcInstance> plrs = getKnownPlayers().values();
			final Iterator<L2PcInstance> pIter = plrs.iterator();
			L2PcInstance player;
			while (pIter.hasNext())
			{
				player = pIter.next();
				if (player == null)
				{
					pIter.remove();
				}
				else if (!player.isVisible() || !Util.checkIfInShortRadius(getDistanceToForgetObject(player), getActiveObject(), player, true))
				{
					pIter.remove();
					removeKnownObject(player, true);
					getKnownRelations().remove(player.getObjectId());
					getKnownObjects().remove(player.getObjectId());
				}
			}
			
			final Collection<L2Summon> sums = getKnownSummons().values();
			final Iterator<L2Summon> sIter = sums.iterator();
			L2Summon summon;
			
			while (sIter.hasNext())
			{
				summon = sIter.next();
				if (summon == null)
				{
					sIter.remove();
				}
				else if (!summon.isVisible() || !Util.checkIfInShortRadius(getDistanceToForgetObject(summon), getActiveObject(), summon, true))
				{
					sIter.remove();
					removeKnownObject(summon, true);
					getKnownObjects().remove(summon.getObjectId());
				}
			}
			
			return;
		}
		// Go through knownObjects
		final Collection<L2Object> objs = getKnownObjects().values();
		final Iterator<L2Object> oIter = objs.iterator();
		L2Object object;
		while (oIter.hasNext())
		{
			object = oIter.next();
			if (object == null)
			{
				oIter.remove();
			}
			else if (!object.isVisible() || !Util.checkIfInShortRadius(getDistanceToForgetObject(object), getActiveObject(), object, true))
			{
				oIter.remove();
				removeKnownObject(object, true);
				
				if (object.isPlayer())
				{
					getKnownPlayers().remove(object.getObjectId());
					getKnownRelations().remove(object.getObjectId());
				}
				else if (object.isSummon())
				{
					getKnownSummons().remove(object.getObjectId());
				}
			}
		}
	}
	
	public L2Character getActiveChar()
	{
		return (L2Character) super.getActiveObject();
	}
	
	public Collection<L2Character> getKnownCharacters()
	{
		FastList<L2Character> result = null;
		
		final Collection<L2Object> objs = getKnownObjects().values();
		for (L2Object obj : objs)
		{
			if (obj instanceof L2Character)
			{
				if (result == null) result = new FastList<>();
				result.add((L2Character) obj);
			}
		}
		return result != null ? result : Collections.<L2Character>emptyList();
	}
	
	public Collection<L2Character> getKnownCharactersInRadius(long radius)
	{
		List<L2Character> result = null;
		
		final Collection<L2Object> objs = getKnownObjects().values();
		for (L2Object obj : objs)
		{
			if (obj instanceof L2Character)
			{
				if (Util.checkIfInRange((int) radius, getActiveChar(), obj, true))
				{
					if (result == null) result = new ArrayList<>();
					result.add((L2Character) obj);
				}
			}
		}
		
		return result != null ? result : Collections.<L2Character>emptyList();
	}
	
	public final Map<Integer, L2PcInstance> getKnownPlayers()
	{
		if (_knownPlayers == null)
		{
			_knownPlayers = new FastMap/*L2FastMap*/<Integer, L2PcInstance>().shared();
		}
		return _knownPlayers;
	}
	
	public final Map<Integer, Integer> getKnownRelations()
	{
		if (_knownRelations == null)
		{
			_knownRelations = new FastMap/*L2FastMap*/<Integer, Integer>().shared();
		}
		return _knownRelations;
	}
	
	public final Map<Integer, L2Summon> getKnownSummons()
	{
		if (_knownSummons == null)
		{
			_knownSummons = new FastMap/*L2FastMap*/<Integer, L2Summon>().shared();
		}
		return _knownSummons;
	}
	
	public final Collection<L2PcInstance> getKnownPlayersInRadius(long radius)
	{
		List<L2PcInstance> result = null;
		
		final Collection<L2PcInstance> plrs = getKnownPlayers().values();
		for (L2PcInstance player : plrs)
		{
			if (Util.checkIfInRange((int) radius, getActiveChar(), player, true))
			{
				if (result == null) result = new ArrayList<>();
				result.add(player);
			}
		}
		return result != null ? result : Collections.<L2PcInstance>emptyList();
	}
}
