/*
 * Created on 14-Feb-2005
 * Created by Paul Gardner
 * Copyright (C) 2004, 2005, 2006 Aelitis, All Rights Reserved.
 *
 * 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 2
 * 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, write to the Free Software
 * Foundation, Inc., 59 Temple Place - Suite 330, Boston, MA  02111-1307, USA.
 * 
 * AELITIS, SAS au capital de 46,603.30 euros
 * 8 Allee Lenotre, La Grille Royale, 78600 Le Mesnil le Roi, France.
 *
 */

package org.gudy.azureus2.core3.tracker.client.impl.dht;

import java.util.*;
import java.net.URL;

import org.gudy.azureus2.core3.torrent.TOTorrent;
import org.gudy.azureus2.core3.torrent.TOTorrentException;
import org.gudy.azureus2.core3.tracker.client.TRTrackerAnnouncer;
import org.gudy.azureus2.core3.tracker.client.TRTrackerScraperResponse;
import org.gudy.azureus2.core3.tracker.client.impl.TRTrackerScraperImpl;
import org.gudy.azureus2.core3.tracker.client.impl.TRTrackerScraperResponseImpl;
import org.gudy.azureus2.core3.util.AEMonitor;
import org.gudy.azureus2.core3.util.Debug;
import org.gudy.azureus2.plugins.download.DownloadScrapeResult;

/**
 * @author parg
 *
 */

public class 
TRTrackerDHTScraperImpl 
{
	protected static TRTrackerDHTScraperImpl	singleton;
	protected static AEMonitor 					class_mon 	= new AEMonitor( "TRTrackerDHTScraper" );

	private TRTrackerScraperImpl		scraper;

	private Map		responses = new HashMap();
	
	public static TRTrackerDHTScraperImpl
	create(
		TRTrackerScraperImpl	_scraper )
	{
		try{
			class_mon.enter();
		
			if ( singleton == null ){
			
				singleton =  new TRTrackerDHTScraperImpl( _scraper );
			}
			
			return( singleton );
			
		}finally{
			
			class_mon.exit();
		}
	}
	
	protected
	TRTrackerDHTScraperImpl(
		TRTrackerScraperImpl	_scraper )
	{
		scraper	= _scraper;
	}
	
	public void
	setScrape(
		TOTorrent				torrent,
		URL						url,
		DownloadScrapeResult	result )
	{
		if ( torrent != null && result != null){
			
			try{
				TRTrackerScraperResponseImpl resp = 
					new TRTrackerDHTScraperResponseImpl( torrent.getHashWrapper(), result.getURL());
							
				resp.setSeedsPeers( result.getSeedCount(), result.getNonSeedCount());
				
				resp.setScrapeStartTime( result.getScrapeStartTime());
				
				resp.setNextScrapeStartTime( result.getNextScrapeStartTime());
				
				resp.setStatus( 
						result.getResponseType()==DownloadScrapeResult.RT_SUCCESS?
								TRTrackerScraperResponse.ST_ONLINE:
								TRTrackerScraperResponse.ST_ERROR,
						result.getStatus()); 
			
				responses.put( torrent.getHashWrapper(), resp );
				
				scraper.scrapeReceived( resp );
				
			}catch( TOTorrentException e ){
				
				Debug.printStackTrace(e);
			}
		}
	}
	
	public TRTrackerScraperResponse
	scrape(
		TOTorrent		torrent,
		URL				target_url,
		boolean			force )
	{
		if ( torrent != null ){

			try{
				return((TRTrackerScraperResponse)responses.get( torrent.getHashWrapper()));
				
			}catch( TOTorrentException e ){
				
				Debug.printStackTrace(e);
			}
		}
		
		return( null );
	}
	
	public TRTrackerScraperResponse
	scrape(
		TRTrackerAnnouncer	tracker_client )
	{
		TOTorrent	torrent = tracker_client.getTorrent();
		
		if ( torrent != null ){

			try{
				return((TRTrackerScraperResponse)responses.get( torrent.getHashWrapper()));
				
			}catch( TOTorrentException e ){
				
				Debug.printStackTrace(e);
			}
		}
		
		return( null );	
	}
	
	public void
	remove(
		TOTorrent		torrent )
	{
		try{
			responses.remove( torrent.getHashWrapper());
			
		}catch( TOTorrentException e ){
			
			Debug.printStackTrace(e);
		}
	}
}