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#include "qgstreamermetadataprovider.h"

#include "qgstreamerplayersession.h"

#include <QDebug>

#include <gst/gstversion.h>

struct QGstreamerMetaDataKeyLookup

{

    QtMediaServices::MetaData key;

    const char *token;

};

static const QGstreamerMetaDataKeyLookup qt_gstreamerMetaDataKeys[] =

{

    { QtMediaServices::Title, GST_TAG_TITLE },

    //{ QtMediaServices::SubTitle, 0 },

    //{ QtMediaServices::Author, 0 },

    { QtMediaServices::Comment, GST_TAG_COMMENT },

    { QtMediaServices::Description, GST_TAG_DESCRIPTION },

    //{ QtMediaServices::Category, 0 },

    { QtMediaServices::Genre, GST_TAG_GENRE },

    { QtMediaServices::Year, "year" },

    //{ QtMediaServices::UserRating, 0 },

    { QtMediaServices::Language, GST_TAG_LANGUAGE_CODE },

    { QtMediaServices::Publisher, GST_TAG_ORGANIZATION },

    { QtMediaServices::Copyright, GST_TAG_COPYRIGHT },

    //{ QtMediaServices::ParentalRating, 0 },

    //{ QtMediaServices::RatingOrganisation, 0 },

    // Media

    //{ QtMediaServices::Size, 0 },

    //{ QtMediaServices::MediaType, 0 },

    { QtMediaServices::Duration, GST_TAG_DURATION },

    // Audio

    { QtMediaServices::AudioBitRate, GST_TAG_BITRATE },

    { QtMediaServices::AudioCodec, GST_TAG_AUDIO_CODEC },

    //{ QtMediaServices::ChannelCount, 0 },

    //{ QtMediaServices::SampleRate, 0 },

    // Music

    { QtMediaServices::AlbumTitle, GST_TAG_ALBUM },

    { QtMediaServices::AlbumArtist,  GST_TAG_ARTIST},

    { QtMediaServices::ContributingArtist, GST_TAG_PERFORMER },

#if (GST_VERSION_MAJOR >= 0) && (GST_VERSION_MINOR >= 10) && (GST_VERSION_MICRO >= 19)

    { QtMediaServices::Composer, GST_TAG_COMPOSER },

#endif

    //{ QtMediaServices::Conductor, 0 },

    //{ QtMediaServices::Lyrics, 0 },

    //{ QtMediaServices::Mood, 0 },

    { QtMediaServices::TrackNumber, GST_TAG_TRACK_NUMBER },

    //{ QtMediaServices::CoverArtUrlSmall, 0 },

    //{ QtMediaServices::CoverArtUrlLarge, 0 },

    // Image/Video

    //{ QtMediaServices::Resolution, 0 },

    //{ QtMediaServices::PixelAspectRatio, 0 },

    // Video

    //{ QtMediaServices::VideoFrameRate, 0 },

    //{ QtMediaServices::VideoBitRate, 0 },

    { QtMediaServices::VideoCodec, GST_TAG_VIDEO_CODEC },

    //{ QtMediaServices::PosterUrl, 0 },

    // Movie

    //{ QtMediaServices::ChapterNumber, 0 },

    //{ QtMediaServices::Director, 0 },

    { QtMediaServices::LeadPerformer, GST_TAG_PERFORMER },

    //{ QtMediaServices::Writer, 0 },

    // Photos

    //{ QtMediaServices::CameraManufacturer, 0 },

    //{ QtMediaServices::CameraModel, 0 },

    //{ QtMediaServices::Event, 0 },

    //{ QtMediaServices::Subject, 0 }

};

QGstreamerMetaDataProvider::QGstreamerMetaDataProvider(QGstreamerPlayerSession *session, QObject *parent)

    :QMetaDataControl(parent), m_session(session)

{

    connect(m_session, SIGNAL(tagsChanged()), SLOT(updateTags()));

}

QGstreamerMetaDataProvider::~QGstreamerMetaDataProvider()

{

}

bool QGstreamerMetaDataProvider::isMetaDataAvailable() const

{

    return !m_session->tags().isEmpty();

}

bool QGstreamerMetaDataProvider::isWritable() const

{

    return false;

}

QVariant QGstreamerMetaDataProvider::metaData(QtMediaServices::MetaData key) const

{

    static const int count = sizeof(qt_gstreamerMetaDataKeys) / sizeof(QGstreamerMetaDataKeyLookup);

    for (int i = 0; i < count; ++i) {

        if (qt_gstreamerMetaDataKeys[i].key == key) {

            return m_session->tags().value(QByteArray(qt_gstreamerMetaDataKeys[i].token));

        }

    }

    return QVariant();

}

void QGstreamerMetaDataProvider::setMetaData(QtMediaServices::MetaData key, QVariant const &value)

{

    Q_UNUSED(key);

    Q_UNUSED(value);

}

QList<QtMediaServices::MetaData> QGstreamerMetaDataProvider::availableMetaData() const

{

    static QMap<QByteArray, QtMediaServices::MetaData> keysMap;

    if (keysMap.isEmpty()) {

        const int count = sizeof(qt_gstreamerMetaDataKeys) / sizeof(QGstreamerMetaDataKeyLookup);

        for (int i = 0; i < count; ++i) {

            keysMap[QByteArray(qt_gstreamerMetaDataKeys[i].token)] = qt_gstreamerMetaDataKeys[i].key;

        }

    }

    QList<QtMediaServices::MetaData> res;

    foreach (const QByteArray &key, m_session->tags().keys()) {

        QtMediaServices::MetaData tag = keysMap.value(key, QtMediaServices::MetaData(-1));

        if (tag != -1)

            res.append(tag);

    }

    return res;

}

QVariant QGstreamerMetaDataProvider::extendedMetaData(const QString &key) const

{

    return m_session->tags().value(key.toLatin1());

}

void QGstreamerMetaDataProvider::setExtendedMetaData(const QString &key, QVariant const &value)

{

    Q_UNUSED(key);

    Q_UNUSED(value);

}

QStringList QGstreamerMetaDataProvider::availableExtendedMetaData() const

{

    QStringList res;

    foreach (const QByteArray &key, m_session->tags().keys())

        res.append(QString(key));

    return res;

}

void QGstreamerMetaDataProvider::updateTags()

{

    emit metaDataChanged();

}