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#include "player.h"

#include "playercontrols.h"

#include "playlistmodel.h"

#include "videowidget.h"

#include <qmediaservice.h>

#include <qmediaplaylist.h>

#include <QtGui>

Player::Player(QWidget *parent)

    : QWidget(parent)

    , videoWidget(0)

    , coverLabel(0)

    , slider(0)

    , colorDialog(0)

{

//! [create-objs]

    player = new QMediaPlayer(this);

    // owned by PlaylistModel

    playlist = new QMediaPlaylist();

    player->setPlaylist(playlist);

//! [create-objs]

    connect(player, SIGNAL(durationChanged(qint64)), SLOT(durationChanged(qint64)));

    connect(player, SIGNAL(positionChanged(qint64)), SLOT(positionChanged(qint64)));

    connect(player, SIGNAL(metaDataChanged()), SLOT(metaDataChanged()));

    connect(playlist, SIGNAL(currentIndexChanged(int)), SLOT(playlistPositionChanged(int)));

    connect(player, SIGNAL(mediaStatusChanged(QMediaPlayer::MediaStatus)),

            this, SLOT(statusChanged(QMediaPlayer::MediaStatus)));

    connect(player, SIGNAL(bufferStatusChanged(int)), this, SLOT(bufferingProgress(int)));

    connect(player, SIGNAL(error(QMediaPlayer::Error)), this, SLOT(displayErrorMessage()));

//! [2]

    videoWidget = new VideoWidget(this);

    player->setVideoOutput(videoWidget);

    playlistModel = new PlaylistModel(this);

    playlistModel->setPlaylist(playlist);

//! [2]

    playlistView = new QListView(this);

    playlistView->setModel(playlistModel);

    playlistView->setCurrentIndex(playlistModel->index(playlist->currentIndex(), 0));

    connect(playlistView, SIGNAL(activated(QModelIndex)), this, SLOT(jump(QModelIndex)));

    slider = new QSlider(Qt::Horizontal, this);

    slider->setRange(0, player->duration() / 1000);

    connect(slider, SIGNAL(sliderMoved(int)), this, SLOT(seek(int)));

    QPushButton *openButton = new QPushButton(tr("Open"), this);

    connect(openButton, SIGNAL(clicked()), this, SLOT(open()));

    PlayerControls *controls = new PlayerControls(this);

    controls->setState(player->state());

    controls->setVolume(player->volume());

    controls->setMuted(controls->isMuted());

    connect(controls, SIGNAL(play()), player, SLOT(play()));

    connect(controls, SIGNAL(pause()), player, SLOT(pause()));

    connect(controls, SIGNAL(stop()), player, SLOT(stop()));

    connect(controls, SIGNAL(next()), playlist, SLOT(next()));

    connect(controls, SIGNAL(previous()), this, SLOT(previousClicked()));

    connect(controls, SIGNAL(changeVolume(int)), player, SLOT(setVolume(int)));

    connect(controls, SIGNAL(changeMuting(bool)), player, SLOT(setMuted(bool)));

    connect(controls, SIGNAL(changeRate(qreal)), player, SLOT(setPlaybackRate(qreal)));

    connect(controls, SIGNAL(stop()), videoWidget, SLOT(update()));

    connect(player, SIGNAL(stateChanged(QMediaPlayer::State)),

            controls, SLOT(setState(QMediaPlayer::State)));

    connect(player, SIGNAL(volumeChanged(int)), controls, SLOT(setVolume(int)));

    connect(player, SIGNAL(mutedChanged(bool)), controls, SLOT(setMuted(bool)));

    QPushButton *fullScreenButton = new QPushButton(tr("FullScreen"), this);

    fullScreenButton->setCheckable(true);

    if (videoWidget != 0) {

        connect(fullScreenButton, SIGNAL(clicked(bool)), videoWidget, SLOT(setFullScreen(bool)));

        connect(videoWidget, SIGNAL(fullScreenChanged(bool)),

                fullScreenButton, SLOT(setChecked(bool)));

    } else {

        fullScreenButton->setEnabled(false);

    }

    QPushButton *colorButton = new QPushButton(tr("Color Options..."), this);

    if (videoWidget)

        connect(colorButton, SIGNAL(clicked()), this, SLOT(showColorDialog()));

    else

        colorButton->setEnabled(false);

    QBoxLayout *displayLayout = new QHBoxLayout;

    if (videoWidget)

        displayLayout->addWidget(videoWidget, 2);

    else

        displayLayout->addWidget(coverLabel, 2);

    displayLayout->addWidget(playlistView);

    QBoxLayout *controlLayout = new QHBoxLayout;

    controlLayout->setMargin(0);

    controlLayout->addWidget(openButton);

    controlLayout->addStretch(1);

    controlLayout->addWidget(controls);

    controlLayout->addStretch(1);

    controlLayout->addWidget(fullScreenButton);

    controlLayout->addWidget(colorButton);

    QBoxLayout *layout = new QVBoxLayout;

    layout->addLayout(displayLayout);

    layout->addWidget(slider);

    layout->addLayout(controlLayout);

    setLayout(layout);

    if (!player->isAvailable()) {

        QMessageBox::warning(this, tr("Service not available"),

                             tr("The QMediaPlayer object does not have a valid service.\n"\

                                "Please check the media service plugins are installed."));

        controls->setEnabled(false);

        playlistView->setEnabled(false);

        openButton->setEnabled(false);

        colorButton->setEnabled(false);

        fullScreenButton->setEnabled(false);

    }

    metaDataChanged();

    QStringList arguments = qApp->arguments();

    arguments.removeAt(0);

    addToPlaylist(arguments);

}

Player::~Player()

{

}

void Player::open()

{

    QStringList fileNames = QFileDialog::getOpenFileNames();

    addToPlaylist(fileNames);

}

void Player::addToPlaylist(const QStringList& fileNames)

{

    foreach (QString const &argument, fileNames) {

        QFileInfo fileInfo(argument);

        if (fileInfo.exists()) {

            QUrl url = QUrl::fromLocalFile(fileInfo.absoluteFilePath());

            if (fileInfo.suffix().toLower() == QLatin1String("m3u")) {

                playlist->load(url);

            } else

                playlist->addMedia(url);

        } else {

            QUrl url(argument);

            if (url.isValid()) {

                playlist->addMedia(url);

            }

        }

    }

}

void Player::durationChanged(qint64 duration)

{

    slider->setMaximum(duration / 1000);

}

void Player::positionChanged(qint64 progress)

{

    if (!slider->isSliderDown()) {

        slider->setValue(progress / 1000);

    }

}

void Player::metaDataChanged()

{

    //qDebug() << "update metadata" << player->metaData(QtMultimediaKit::Title).toString();

    if (player->isMetaDataAvailable()) {

        setTrackInfo(QString("%1 - %2")

                .arg(player->metaData(QtMultimediaKit::AlbumArtist).toString())

                .arg(player->metaData(QtMultimediaKit::Title).toString()));

        if (coverLabel) {

            QUrl url = player->metaData(QtMultimediaKit::CoverArtUrlLarge).value<QUrl>();

            coverLabel->setPixmap(!url.isEmpty()

                    ? QPixmap(url.toString())

                    : QPixmap());

        }

    }

}

void Player::previousClicked()

{

    // Go to previous track if we are within the first 5 seconds of playback

    // Otherwise, seek to the beginning.

    if(player->position() <= 5000)

        playlist->previous();

    else

        player->setPosition(0);

}

void Player::jump(const QModelIndex &index)

{

    if (index.isValid()) {

        playlist->setCurrentIndex(index.row());

        player->play();

    }

}

void Player::playlistPositionChanged(int currentItem)

{

    playlistView->setCurrentIndex(playlistModel->index(currentItem, 0));

}

void Player::seek(int seconds)

{

    player->setPosition(seconds * 1000);

}

void Player::statusChanged(QMediaPlayer::MediaStatus status)

{

    handleCursor(status);

    // handle status message

    switch (status) {

    case QMediaPlayer::UnknownMediaStatus:

    case QMediaPlayer::NoMedia:

    case QMediaPlayer::LoadedMedia:

    case QMediaPlayer::BufferingMedia:

    case QMediaPlayer::BufferedMedia:

        setStatusInfo(QString());

        break;

    case QMediaPlayer::LoadingMedia:

        setStatusInfo(tr("Loading..."));

        break;

    case QMediaPlayer::StalledMedia:

        setStatusInfo(tr("Media Stalled"));

        break;

    case QMediaPlayer::EndOfMedia:

        QApplication::alert(this);

        break;

    case QMediaPlayer::InvalidMedia:

        displayErrorMessage();

        break;

    }

}

void Player::handleCursor(QMediaPlayer::MediaStatus status)

{

#ifndef QT_NO_CURSOR

    if( status == QMediaPlayer::LoadingMedia ||

        status == QMediaPlayer::BufferingMedia ||

        status == QMediaPlayer::StalledMedia)

        setCursor(QCursor(Qt::BusyCursor));

    else

        unsetCursor();

#endif

}

void Player::bufferingProgress(int progress)

{

    setStatusInfo(tr("Buffering %4%").arg(progress));

}

void Player::setTrackInfo(const QString &info)

{

    trackInfo = info;

    if (!statusInfo.isEmpty())

        setWindowTitle(QString("%1 | %2").arg(trackInfo).arg(statusInfo));

    else

        setWindowTitle(trackInfo);

}

void Player::setStatusInfo(const QString &info)

{

    statusInfo = info;

    if (!statusInfo.isEmpty())

        setWindowTitle(QString("%1 | %2").arg(trackInfo).arg(statusInfo));

    else

        setWindowTitle(trackInfo);

}

void Player::displayErrorMessage()

{

    setStatusInfo(player->errorString());

}

void Player::showColorDialog()

{

    if (!colorDialog) {

        QSlider *brightnessSlider = new QSlider(Qt::Horizontal);

        brightnessSlider->setRange(-100, 100);

        brightnessSlider->setValue(videoWidget->brightness());

        connect(brightnessSlider, SIGNAL(sliderMoved(int)), videoWidget, SLOT(setBrightness(int)));

        connect(videoWidget, SIGNAL(brightnessChanged(int)), brightnessSlider, SLOT(setValue(int)));

        QSlider *contrastSlider = new QSlider(Qt::Horizontal);

        contrastSlider->setRange(-100, 100);

        contrastSlider->setValue(videoWidget->contrast());

        connect(contrastSlider, SIGNAL(sliderMoved(int)), videoWidget, SLOT(setContrast(int)));

        connect(videoWidget, SIGNAL(contrastChanged(int)), contrastSlider, SLOT(setValue(int)));

        QSlider *hueSlider = new QSlider(Qt::Horizontal);

        hueSlider->setRange(-100, 100);

        hueSlider->setValue(videoWidget->hue());

        connect(hueSlider, SIGNAL(sliderMoved(int)), videoWidget, SLOT(setHue(int)));

        connect(videoWidget, SIGNAL(hueChanged(int)), hueSlider, SLOT(setValue(int)));

        QSlider *saturationSlider = new QSlider(Qt::Horizontal);

        saturationSlider->setRange(-100, 100);

        saturationSlider->setValue(videoWidget->saturation());

        connect(saturationSlider, SIGNAL(sliderMoved(int)), videoWidget, SLOT(setSaturation(int)));

        connect(videoWidget, SIGNAL(saturationChanged(int)), saturationSlider, SLOT(setValue(int)));

        QFormLayout *layout = new QFormLayout;

        layout->addRow(tr("Brightness"), brightnessSlider);

        layout->addRow(tr("Contrast"), contrastSlider);

        layout->addRow(tr("Hue"), hueSlider);

        layout->addRow(tr("Saturation"), saturationSlider);

        colorDialog = new QDialog(this);

        colorDialog->setWindowTitle(tr("Color Options"));

        colorDialog->setLayout(layout);

    }

    colorDialog->show();

}