/*
 * 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 net.sf.l2j.gameserver;

import java.io.File;
import java.io.FileReader;
import java.io.FileWriter;
import java.io.IOException;
import java.io.LineNumberReader;
import java.util.Date;
import java.util.List;
import java.util.StringTokenizer;
import java.util.logging.Level;
import java.util.logging.Logger;

import javolution.text.TextBuilder;
import javolution.util.FastList;
import net.sf.l2j.Config;
import net.sf.l2j.gameserver.cache.HtmCache;
import net.sf.l2j.gameserver.clientpackets.Say2;
import net.sf.l2j.gameserver.model.L2World;
import net.sf.l2j.gameserver.model.actor.instance.L2PcInstance;
import net.sf.l2j.gameserver.network.SystemMessageId;
import net.sf.l2j.gameserver.script.DateRange;
import net.sf.l2j.gameserver.serverpackets.CreatureSay;
import net.sf.l2j.gameserver.serverpackets.NpcHtmlMessage;
import net.sf.l2j.gameserver.serverpackets.SystemMessage;

/**
 * This class ...
 *
 * @version $Revision: 1.5.2.1.2.7 $ $Date: 2005/03/29 23:15:14 $
 */
public class Announcements
{
	private static Logger _log = Logger.getLogger(Announcements.class.getName());

	private static Announcements _instance;
	private List<String> _announcements = new FastList<String>();
	private List<List<Object>> _eventAnnouncements = new FastList<List<Object>>();

	public Announcements()
	{
		loadAnnouncements();
	}

	public static Announcements getInstance()
	{
		if (_instance == null)
		{
			_instance = new Announcements();
		}

		return _instance;
	}


	public void loadAnnouncements()
	{
		_announcements.clear();
		File file = new File(Config.DATAPACK_ROOT, "data/announcements.txt");
		if (file.exists())
		{
			readFromDisk(file);
		}
		else
		{
			_log.config("data/announcements.txt doesn't exist");
		}
	}

	public void showAnnouncements(L2PcInstance activeChar)
	{
		for (int i = 0; i < _announcements.size(); i++)
		{
			CreatureSay cs = new CreatureSay(0, Say2.ANNOUNCEMENT, activeChar.getName(), _announcements.get(i));
			activeChar.sendPacket(cs);
		}

		for (int i = 0; i < _eventAnnouncements.size(); i++)
		{
		    List<Object> entry   = _eventAnnouncements.get(i);

            DateRange validDateRange  = (DateRange)entry.get(0);
            String[] msg              = (String[])entry.get(1);
		    Date currentDate          = new Date();

		    if (!validDateRange.isValid() || validDateRange.isWithinRange(currentDate))
		    {
                SystemMessage sm = new SystemMessage(SystemMessageId.S1_S2);
                for (int j=0; j<msg.length; j++)
                {
                    sm.addString(msg[j]);
                }
                activeChar.sendPacket(sm);
		    }

		}
	}

	public void addEventAnnouncement(DateRange validDateRange, String[] msg)
	{
	    List<Object> entry = new FastList<Object>();
	    entry.add(validDateRange);
	    entry.add(msg);
	    _eventAnnouncements.add(entry);
	}

	public void listAnnouncements(L2PcInstance activeChar)
	{
        String content = HtmCache.getInstance().getHtmForce("data/html/admin/announce.htm");
        NpcHtmlMessage adminReply = new NpcHtmlMessage(5);
        adminReply.setHtml(content);
        TextBuilder replyMSG = new TextBuilder("<br>");
		for (int i = 0; i < _announcements.size(); i++)
		{
			replyMSG.append("<table width=260><tr><td width=220>" + _announcements.get(i) + "</td><td width=40>");
			replyMSG.append("<button value=\"Delete\" action=\"bypass -h admin_del_announcement " + i + "\" width=60 height=15 back=\"sek.cbui94\" fore=\"sek.cbui92\"></td></tr></table>");
		}
        adminReply.replace("%announces%", replyMSG.toString());
		activeChar.sendPacket(adminReply);
	}

	public void addAnnouncement(String text)
	{
		_announcements.add(text);
		saveToDisk();
	}

	public void delAnnouncement(int line)
	{
		_announcements.remove(line);
		saveToDisk();
	}

	private void readFromDisk(File file)
	{
		LineNumberReader lnr = null;
		try
		{
			int i=0;
			String line = null;
			lnr = new LineNumberReader(new FileReader(file));
			while ( (line = lnr.readLine()) != null)
			{
				StringTokenizer st = new StringTokenizer(line,"\n\r");
				if (st.hasMoreTokens())
				{
					String announcement = st.nextToken();
					_announcements.add(announcement);

					i++;
				}
			}

			_log.config("Announcements: Loaded " + i + " Announcements.");
		}
		catch (IOException e1)
		{
			_log.log(Level.SEVERE, "Error reading announcements", e1);
		}
		finally
		{
			try
			{
				lnr.close();
			}
			catch (Exception e2)
			{
				// nothing
			}
		}
	}

	private void saveToDisk()
	{
		File file = new File("data/announcements.txt");
		FileWriter save = null;

		try
		{
			save = new FileWriter(file);
			for (int i = 0; i < _announcements.size(); i++)
			{
				save.write(_announcements.get(i));
				save.write("\r\n");
			}
			save.flush();
			save.close();
			save = null;
		}
		catch (IOException e)
		{
			_log.warning("saving the announcements file has failed: " + e);
		}
	}

	public void announceToAll(String text) {
		CreatureSay cs = new CreatureSay(0, Say2.ANNOUNCEMENT, "", text);

		for (L2PcInstance player : L2World.getInstance().getAllPlayers())
		{
			player.sendPacket(cs);
		}
	}
	public void announceToAll(SystemMessage sm) {

		for (L2PcInstance player : L2World.getInstance().getAllPlayers())
		{
			player.sendPacket(sm);
		}
	}

	// Method fo handling announcements from admin
	public void handleAnnounce(String command, int lengthToTrim)
	{
		try
		{
			// Announce string to everyone on server
			String text = command.substring(lengthToTrim);
			Announcements.getInstance().announceToAll(text);
		}

		// No body cares!
		catch (StringIndexOutOfBoundsException e)
		{
			// empty message.. ignore
		}
	}
}