/*
 * Created on 16-Dec-2005
 * Created by Paul Gardner
 * Copyright (C) 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 com.aelitis.azureus.plugins.extseed.impl.getright;

import java.net.URL;

import org.gudy.azureus2.core3.util.Debug;
import org.gudy.azureus2.plugins.peers.PeerManager;
import org.gudy.azureus2.plugins.peers.PeerReadRequest;
import org.gudy.azureus2.plugins.torrent.Torrent;

import com.aelitis.azureus.plugins.extseed.ExternalSeedException;
import com.aelitis.azureus.plugins.extseed.ExternalSeedPlugin;
import com.aelitis.azureus.plugins.extseed.impl.ExternalSeedReaderImpl;
import com.aelitis.azureus.plugins.extseed.util.ExternalSeedHTTPDownloader;

public class 
ExternalSeedReaderGetRight
	extends ExternalSeedReaderImpl
{
	private URL			url;
	private String		ip;
	private int			port;
	
	private ExternalSeedHTTPDownloader	http_downloader;
	
	protected
	ExternalSeedReaderGetRight(
		ExternalSeedPlugin 		_plugin,
		Torrent					_torrent,	
		URL						_url )
	{
		super( _plugin, _torrent );
		
		url		= _url;
		
		ip		= url.getHost();
		port	= url.getPort();
		
		if ( port == -1 ){
			
			port = url.getDefaultPort();
		}
		
		http_downloader  = new ExternalSeedHTTPDownloader( url, getUserAgent());
		
	}
	
	public String
	getName()
	{
		return( "GR: " + url );
	}
	
	public String
	getIP()
	{
		return( ip );
	}
	
	public int
	getPort()
	{
		return( port );
	}
	
	protected boolean
	readyToActivate(
		PeerManager	peer_manager )
	{
		int	fail_count = getFailureCount();
		
		if ( fail_count > 0 ){
			
			int	delay	= 30000;
			
			for (int i=1;i<fail_count;i++){
				
				delay += delay;
				
				if ( delay > 30*60*1000 ){
					
					break;
				}
			}
			
			long	now = getSystemTime();
			
			long	last_fail = getLastFailTime();
			
			if ( last_fail < now && now - last_fail < delay ){
				
				return( false );
			}
		}
		
		try{
			float availability = peer_manager.getDownload().getStats().getAvailability();
			
			if ( availability < 1.0 ){
				
				log( getName() + ": activating as availability is poor" );
				
				return( true );
			}
		}catch( Throwable e ){
			
			Debug.printStackTrace(e);
		}
		
		return( false );		
	}
	
	protected boolean
	readyToDeactivate(
		PeerManager	peer_manager )
	{
		try{
			float availability = peer_manager.getDownload().getStats().getAvailability();
			
			if ( availability >= 2.0 ){
				
				log( getName() + ": deactivating as availability is good" );
				
				return( true );
			}
		}catch( Throwable e ){
			
			Debug.printStackTrace(e);
		}
		
		return( false );
	}
	

	
	protected byte[]
	readData(
		PeerReadRequest	request )
	
		throws ExternalSeedException
	{
		return( http_downloader.downloadRange( 
						request.getPieceNumber() * getTorrent().getPieceSize() + request.getOffset(), 
						request.getLength()));
	}
}