/*
 * This file is part of aion-unique <aion-unique.org>.
 *
 *  aion-unique 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.
 *
 *  aion-unique 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 aion-unique.  If not, see <http://www.gnu.org/licenses/>.
 */
package com.aionemu.gameserver.model.gameobjects.player;

import java.util.Collection;
import java.util.Comparator;
import java.util.Map;
import java.util.SortedSet;
import java.util.TreeSet;
import java.util.concurrent.ConcurrentHashMap;

import com.aionemu.gameserver.model.gameobjects.Letter;

/**
 * @author kosyachok
 * @modified Atracer
 */
public class Mailbox
{
	private Map<Integer, Letter>	mails	= new ConcurrentHashMap<Integer, Letter>();

	/**
	 * 
	 * @param letter
	 */
	public void putLetterToMailbox(Letter letter)
	{
		mails.put(letter.getObjectId(), letter);
	}

	/**
	 * Get all letters in mailbox (sorted according to time received)
	 * 
	 * @return
	 */
	public Collection<Letter> getLetters()
	{
		SortedSet<Letter> letters = new TreeSet<Letter>(new Comparator<Letter>(){

			@Override
			public int compare(Letter o1, Letter o2)
			{
				if(o1.getTimeStamp().getTime() > o2.getTimeStamp().getTime())
					return 1;
				if(o1.getTimeStamp().getTime() < o2.getTimeStamp().getTime())
					return -1;

				return o1.getObjectId() > o2.getObjectId() ? 1 : -1;
			}

		});
		
		for(Letter letter : mails.values())
		{
			letters.add(letter);
		}
		return letters;
	}

	/**
	 * Get letter with specified letter id
	 * 
	 * @param letterObjId
	 * @return
	 */
	public Letter getLetterFromMailbox(int letterObjId)
	{
		return mails.get(letterObjId);
	}

	/**
	 * Check whether mailbox contains empty letters
	 * 
	 * @return
	 */
	public boolean haveUnread()
	{
		for(Letter letter : mails.values())
		{
			if(letter.isUnread())
				return true;
		}

		return false;
	}

	/**
	 * 
	 * @return
	 */
	public int getFreeSlots()
	{
		return 65536 - mails.size();
	}
	
	/**
	 * 
	 * @return
	 */
	public boolean haveFreeSlots()
	{
		return mails.size() < 100;
	}

	/**
	 * @param letterId
	 */
	public void removeLetter(int letterId)
	{
		mails.remove(letterId);
	}

	/**
	 * Current size of mailbox
	 * 
	 * @return
	 */
	public int size()
	{
		return mails.size();
	}
}