#include "player.h"

// Public
Player::Player(QObject *parent) : QObject(parent),
    player(this), output(this), manager(this)
{
    QObject::connect(&this->player, &QMediaPlayer::mediaStatusChanged, this, [this] () {
        emit this->hasVideoChanged();
        emit this->loadingChanged();
    });

    QObject::connect(&this->player, &QMediaPlayer::playbackStateChanged, this, [this] () {
        emit this->playingChanged();
    });

    QObject::connect(&this->output, &QAudioOutput::volumeChanged, this, [this] () {
        emit this->volumeChanged();
    });

    this->output.setVolume(0.2);
    this->player.setAudioOutput(&this->output);

    qDebug("Player::Player(): Constructed");
}

Player::~Player()
{
    qDebug("Player::~Player(): Destructed");
}

bool Player::hasVideo() const
{
    return this->player.isAvailable();
}

bool Player::loading() const
{
    return this->player.mediaStatus() == QMediaPlayer::LoadingMedia || this->player.mediaStatus() == QMediaPlayer::BufferingMedia;
}

bool Player::failed() const
{
    return this->m_failed;
}

bool Player::playing() const
{
    return this->player.playbackState() == QMediaPlayer::PlayingState;
}

float Player::volume() const
{
    return this->output.volume();
}

void Player::setVolume(float newVolume)
{
    this->output.setVolume(newVolume);
}

// Public slots
void Player::loadVideo(QString id)
{
    if (this->hasVideo())
    {
        this->unloadVideo();
    }
    QNetworkReply* reply = this->manager.get(QNetworkRequest(QUrl("https://youvideo.nonamesoft.xyz/youvideo/video/" + id)));

    QEventLoop loop(this);
    QObject::connect(reply, SIGNAL(finished()), &loop, SLOT(quit()));
    loop.exec();

    if (reply->error() != QNetworkReply::NoError)
    {
        qDebug() << "Player::loadVideo(): Video " << id << " doesn't exist!\n";
        delete reply;
        return;
    }

    const QJsonDocument data = QJsonDocument::fromJson(reply->readAll());

    this->player.setSource(QUrl("https://youvideo.nonamesoft.xyz/youvideo/api/videofile/with_extension/" + id + data ["extension"].toString()));

    emit this->hasVideoChanged();
    emit this->loadingChanged();
    this->m_failed = false;
    emit this->failedChanged();

    qDebug() << "Player::loadVideo(): Loaded video https://youvideo.nonamesoft.xyz/youvideo/api/videofile/with_extension/" + id + data ["extension"].toString();

    delete reply;
}

void Player::unloadVideo() {
    qDebug("Player::unloadVideo(): Video unloaded");
    this->player.setSource(QUrl(""));
    this->player.stop();
    this->m_failed = false;

    emit this->hasVideoChanged();
    emit this->failedChanged();
    emit this->loadingChanged();
    emit this->playingChanged();
}

void Player::play()
{
    qDebug() << "Player::play(): Can't play video?" << this->hasVideo() << this->loading();
    if (!this->hasVideo() || this->loading())
    {
        return;
    }    
    this->player.play();
}

void Player::pause()
{
    qDebug() << "Player::pause(): Can't pause video?" << (!this->hasVideo() || this->loading());
    if (!this->hasVideo() || this->loading())
    {
        return;
    }
    this->player.pause();
}

void Player::stop()
{
    qDebug() << "Player::stop(): Can't stop video?" << (!this->hasVideo() || this->loading());
    if (!this->hasVideo() || this->loading())
    {
        return;
    }
    this->player.stop();
    this->unloadVideo();
}