/*

* Copyright (c) 2009 Nokia Corporation and/or its subsidiary(-ies).

* All rights reserved.

* This component and the accompanying materials are made available

* under the terms of "Eclipse Public License v1.0"

* which accompanies this distribution, and is available

* at the URL "http://www.eclipse.org/legal/epl-v10.html".

*

* Initial Contributors:

* Nokia Corporation - initial contribution.

*

* Contributors:

*

* Description: Music Player engine.

*

*/

#ifndef MPENGINE_H

#define MPENGINE_H

#include <QObject>

#include "mpmpxcollectionviewdefs.h"

#include "mpmpxcommondefs.h"

#include "mpcommondefs.h"

class QStringList;

class MpMpxHarvesterFrameworkWrapper;

class MpSongScanner;

class MpMediaKeyHandler;

class MpMpxCollectionFrameworkWrapper;

class MpMpxPlaybackFrameworkWrapper;

class MpMpxCollectionData;

class MpPlaybackData;

class MpSongData;

class XQSharableFile;

class MpEngineFactory;

class MpAudioEffectsFrameworkWrapper;

class MpEqualizerFrameworkWrapper;

#if defined(BUILD_MPENGINE_LIB)

#define MPENGINE_EXPORT Q_DECL_EXPORT

#else

#define MPENGINE_EXPORT Q_DECL_IMPORT

#endif

class MPENGINE_EXPORT MpEngine : public QObject

{

    Q_OBJECT

    Q_PROPERTY(int activePreset READ activePreset)

    friend class MpEngineFactory;

public:

    enum EngineMode{

        StandAlone,

        Fetch,

        Embedded,

        MediaBrowsing

    };

private:

    enum UsbBlockingState {

        USB_NotConnected,          // Not connected

        USB_Connected,             // Connected in MTP mode but not synchronizing

        USB_Synchronizing          // Connected in MassStorage mode or MTP mode and synchronizing

    };

private:

    explicit MpEngine();

public:

    virtual ~MpEngine();

    // Harvester related

    bool verifyUsbBlocking( bool notify = false );

    void checkForSystemEvents();

    MpSongScanner *songScanner();

    // Collection related

    void openCollection( TCollectionContext context );

    void openCollectionItem( int index );

    void back();

    void findPlaylists( QStringList &playlists );

    void createPlaylist( QString &playlistName, QList<int> &selection, MpMpxCollectionData* collectionData = 0  );

    void saveToPlaylist( int playlistIndex, QList<int> &selection );

    void saveToCurrentPlaylist( QList<int> &selection, MpMpxCollectionData *collectionData );    

    void renamePlaylist( QString &newName, int index );

    void renamePlaylist( QString &newName );

    void deleteSongs( QList<int> &selection );

    void previewItem( int index );

    void openIsolatedCollection( TCollectionContext context );

    void releaseIsolatedCollection();

    void findAlbumSongs( int index );

    void playAlbumSongs( int albumIndex, int songIndex, MpMpxCollectionData* collectionData = 0 );

    MpMpxCollectionData *collectionData();

    // Playback related

    MpPlaybackData *playbackData();

    void shuffleAll();

    // Details related

    MpSongData *songData();

    // Audio Effects related

    int balance();

    bool loudness();

    // Equalizer related

    void applyPreset( int presetIndex );

    void disableEqualizer();

    int activePreset();

    QStringList presetNames();

    //Activity related

    void saveActivityData( QByteArray &data );

    void loadActivityData( const QByteArray &data );

signals:

    // Harvester related

    void libraryAboutToUpdate();

    void libraryUpdated();

    void usbBlocked( bool blocked );

    void unableToCotinueDueUSB();

    void usbSynchronizationStarted();

    void usbSynchronizationFinished();

    // Collection related

    void collectionPlaylistOpened();

    void aboutToAddSongs( int count );

    void playlistSaved( bool success );

    void deleteStarted(TCollectionContext context, int Count);

    void songsDeleted( bool success );

    void playlistsRenamed( bool success );

    void isolatedCollectionOpened( MpMpxCollectionData* collectionData );

    void containerContentsChanged();

    void restorePathFailed();

    // Equalizer related

    void equalizerReady();

public slots:

    // Harvester related

    void refreshLibrary( bool automaticRequest = false );

    void handleScanStarted();

    void handleScanEnded( int count, int error );

    void handleDiskEvent( MpxDiskEvents event );

    void handleUsbEvent( MpxUsbEvents event );

    // Collection related

    void reopenCollection();

    void reorderPlaylist( int playlistId, int songId, int originalOrdinal, int newOrdinal );

    void handleDeleteStarted( TCollectionContext context, int count );

    void handleDeleteEnded( bool success );

    void cancelCollectionRequest();

    // Playback related

    void playEmbedded( QString aFilename );

    void playEmbedded( const XQSharableFile&  file );

    void playPause();

    void stop();

    void skipForward();

    void startSeekForward();

    void stopSeeking();

    void skipBackward();

    void startSeekBackward();

    void setPosition( int position );

    void setShuffle( bool mode );

    void setRepeat( bool mode );

    // Audio Effects related

    void setBalance( int balance );

    void setLoudness( bool mode );

    // Equalizer related

    void handleEqualizerReady();

private:

    void initialize( TUid hostUid, EngineMode mode);

    // Harvester related

    void handleUsbMassStorageStartEvent();

    void handleUsbMassStorageEndEvent();

    void handleUsbMtpStartEvent();

    void handleUsbMtpEndEvent();

    void handleUsbMtpNotActive();

    void changeUsbBlockingState( UsbBlockingState state );

private:

    Q_DISABLE_COPY( MpEngine )

    // Harvesting related

    MpMpxHarvesterFrameworkWrapper       *mMpxHarvesterWrapper;  // Own

    MpSongScanner                        *mSongScanner;          // Own

    MpMediaKeyHandler                    *mMediaKeyHandler;      // Own

    // Collection related

    MpMpxCollectionFrameworkWrapper      *mMpxCollectionWrapper; //Own

    // Playback related

    MpMpxPlaybackFrameworkWrapper        *mMpxPlaybackWrapper; //Own

    // Audio Effects related

    MpAudioEffectsFrameworkWrapper       *mAudioEffectsWrapper; // Own

    // Equalizer related

    MpEqualizerFrameworkWrapper          *mEqualizerWrapper; // Own

    int                                  mCurrentPresetIndex;

    // General

    UsbBlockingState                     mUsbBlockingState;

    UsbBlockingState                     mPreviousUsbState;    

    TUid                                 mHostUid;

};

#endif // MPENGINE_H