/***************************************************************************
 *   Copyright 2005-2008 Last.fm Ltd.                                      *
 *                                                                         *
 *   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.,                                       *
 *   51 Franklin Street, Fifth Floor, Boston, MA  02110-1301, USA.         *
 ***************************************************************************/

#ifndef LASTFM_TUNER_H
#define LASTFM_TUNER_H

#include <lastfm/DllExportMacro.h>
#include <lastfm/radio/RadioStation.h>
#include <lastfm/types/Track.h>
#include <lastfm/ws/WsError.h>
#include <QList>
class QNetworkAccessManager;


namespace lastfm {
namespace legacy {

class LASTFM_RADIO_DLLEXPORT Tuner : public QObject
{
	Q_OBJECT
	
public:
	/** You need to have assigned Ws::* for this to work, creating the tuner
	  * automatically fetches the first 5 tracks for the station */
    explicit Tuner( const RadioStation&, const QString& password_md5 );

	QString stationName() const { return m_stationName; }
	
public slots:
    /** Will emit 5 tracks from tracks(), they have to played within an hour
	  * or the streamer will refuse to stream them. Also the previous five are
      * invalidated apart from the one that is currently playing, so sorry, you
      * can't build up big lists of tracks.
      *
      * I feel I must point out that asking the user which one they want to play
      * is also not allowed according to our terms and conditions, which you
      * already agreed to in order to get your API key. Sorry about that dude. 
      */
    void fetchFiveMoreTracks();

signals:
	void stationName( const QString& );
	void tracks( const QList<Track>& );
	
	/** We handle Ws::TryAgain up to 5 times, don't try again after that!
	  * Just tell the user to try again later */
	void error( Ws::Error );

private slots:
	void onHandshakeReturn();
    void onAdjustReturn();
	void onGetPlaylistReturn();

private:
	/** Tries again up to 5 times
	  * @returns true if we tried again, otherwise you should emit error */
	bool tryAgain();

    QNetworkAccessManager* m_nam;
	uint m_retry_counter;
    QString m_stationUrl;
	QString m_stationName;
    QByteArray m_session;
};

} //namespace legacy
} //namespace lastfm

#endif
