/*
 * This file Copyright (C) Mnemosyne LLC
 *
 * This program is free software; you can redistribute it and/or modify
 * it under the terms of the GNU General Public License version 2
 * as published by the Free Software Foundation.
 *
 * http://www.gnu.org/licenses/old-licenses/gpl-2.0.html
 *
 * $Id$
 */

#ifndef TR_APP_SESSION_H
#define TR_APP_SESSION_H

#include <QObject>
#include <QSet>
#include <QBuffer>
#include <QFileInfoList>
#include <QNetworkAccessManager>
#include <QString>
#include <QUrl>

class QStringList;

class AddData;

#include <libtransmission/transmission.h>
#include <libtransmission/quark.h>

extern "C"
{
    struct evbuffer;
    struct tr_variant;
}

class Prefs;

class Session: public QObject
{
        Q_OBJECT

    public:
        Session( const char * configDir, Prefs& prefs );
        ~Session( );

    public:
        void stop( );
        void restart( );

    private:
        void start( );

    public:
        const QUrl& getRemoteUrl( ) const { return myUrl; }
        const struct tr_session_stats& getStats( ) const { return myStats; }
        const struct tr_session_stats& getCumulativeStats( ) const { return myCumulativeStats; }
        const QString& sessionVersion( ) const { return mySessionVersion; }

    public:
        int64_t blocklistSize( ) const { return myBlocklistSize; }
        void setBlocklistSize( int64_t i );
        void updateBlocklist( );
        void portTest( );
        void copyMagnetLinkToClipboard( int torrentId );

    public:

        /** returns true if the transmission session is being run inside this client */
        bool isServer( ) const;

        /** returns true if isServer() is true or if the remote address is the localhost */
        bool isLocal( ) const;

    private:
        void updateStats( struct tr_variant * args );
        void updateInfo( struct tr_variant * args );
        void parseResponse( const char * json, size_t len );
        static void localSessionCallback( tr_session *, struct evbuffer *, void * );

    public:
        void exec( const char * json );
        void exec( const struct tr_variant * request );

    public:
        int64_t getUniqueTag( ) { return nextUniqueTag++; }

    private:
        void sessionSet( const tr_quark key, const QVariant& variant );
        void pumpRequests( );
        void sendTorrentRequest( const char * request, const QSet<int>& torrentIds );
        static void updateStats( struct tr_variant * d, struct tr_session_stats * stats );
        void refreshTorrents( const QSet<int>& torrentIds );
        QNetworkAccessManager * networkAccessManager( );

    public:
        void torrentSet( const QSet<int>& ids, const tr_quark key, bool val );
        void torrentSet( const QSet<int>& ids, const tr_quark key, int val );
        void torrentSet( const QSet<int>& ids, const tr_quark key, double val );
        void torrentSet( const QSet<int>& ids, const tr_quark key, const QList<int>& val );
        void torrentSet( const QSet<int>& ids, const tr_quark key, const QStringList& val );
        void torrentSet( const QSet<int>& ids, const tr_quark key, const QPair<int,QString>& val);
        void torrentSetLocation( const QSet<int>& ids, const QString& path, bool doMove );


    public slots:
        void pauseTorrents( const QSet<int>& torrentIds = QSet<int>() );
        void startTorrents( const QSet<int>& torrentIds = QSet<int>() );
        void startTorrentsNow( const QSet<int>& torrentIds = QSet<int>() );
        void queueMoveTop( const QSet<int>& torrentIds = QSet<int>() );
        void queueMoveUp( const QSet<int>& torrentIds = QSet<int>() );
        void queueMoveDown( const QSet<int>& torrentIds = QSet<int>() );
        void queueMoveBottom( const QSet<int>& torrentIds = QSet<int>() );
        void refreshSessionInfo( );
        void refreshSessionStats( );
        void refreshActiveTorrents( );
        void refreshAllTorrents( );
        void initTorrents( const QSet<int>& ids = QSet<int>() );
        void addNewlyCreatedTorrent( const QString& filename, const QString& localPath );
        void addTorrent( const AddData& addme );
        void removeTorrents( const QSet<int>& torrentIds, bool deleteFiles=false );
        void verifyTorrents( const QSet<int>& torrentIds );
        void reannounceTorrents( const QSet<int>& torrentIds );
        void launchWebInterface( );
        void updatePref( int key );

        /** request a refresh for statistics, including the ones only used by the properties dialog, for a specific torrent */
        void refreshExtraStats( const QSet<int>& ids );

    private slots:
        void onFinished( QNetworkReply * reply );

    signals:
        void executed( int64_t tag, const QString& result, struct tr_variant * arguments );
        void sourceChanged( );
        void portTested( bool isOpen );
        void statsUpdated( );
        void sessionUpdated( );
        void blocklistUpdated( int );
        void torrentsUpdated( struct tr_variant * torrentList, bool completeList );
        void torrentsRemoved( struct tr_variant * torrentList );
        void dataReadProgress( );
        void dataSendProgress( );
        void httpAuthenticationRequired( );

    private:
        int64_t nextUniqueTag;
        int64_t myBlocklistSize;
        Prefs& myPrefs;
        tr_session * mySession;
        QString myConfigDir;
        QString mySessionId;
        QUrl myUrl;
        QNetworkAccessManager * myNAM;
        struct tr_session_stats myStats;
        struct tr_session_stats myCumulativeStats;
        QString mySessionVersion;
};

#endif