#ifndef MUSICPLAYER_H
#define MUSICPLAYER_H

#include <QObject>
#include <QMediaPlayer>
#include <models/NavigationItemModel.h>

/**
 * @brief MusicPlayer providing interface to QML and Navigation
 */
class MusicPlayer : public QMediaPlayer
{
    Q_OBJECT

    Q_PROPERTY(QUrl pCoverImageSource READ getCoverImageSource NOTIFY coverImageSourceChanged)
    Q_PROPERTY(bool pHasNext READ hasNext NOTIFY hasNextChanged)
    Q_PROPERTY(bool pHasPrevious READ hasPrevious NOTIFY hasPreviousChanged)
    Q_PROPERTY(bool pIsPlaying READ isPlaying NOTIFY isPlayingChanged)
    Q_PROPERTY(double pProgress READ getProgress NOTIFY progressChanged)
    Q_PROPERTY(QString pMediaLength READ getMediaLength NOTIFY mediaLengthChanged)
    Q_PROPERTY(QString pTime READ getTime NOTIFY progressChanged)
    Q_PROPERTY(QString pMediaTitle READ getMediaTitle NOTIFY mediaTitleChanged)
    Q_PROPERTY(int pAudioVolume READ getAudioVolume WRITE setAudioVolume NOTIFY audioVolumeChanged)

signals:
    void navigateTo(NavigationItemModel *item);
    void coverImageSourceChanged();
    void hasPreviousChanged();
    void hasNextChanged();
    void isPlayingChanged();
    void progressChanged();
    void mediaLengthChanged();
    void mediaTitleChanged();
    void audioVolumeChanged(int newVolume);

public:
    MusicPlayer(QObject *parent = Q_NULLPTR);
    ~MusicPlayer() =default;

    void init(NavigationItemModel* item);

    /**
     * @brief Get path to media cover image.
     * @return Path to media cover image.
     */
    inline const QString& getCoverImageSource() const {return mCurrentItem->getImageSource();}


    bool isPlaying() const;
    bool hasNext() const;
    bool hasPrevious() const;

    /**
     * @brief Get audio volume. Range is in between 0 and 100
     * Relays info from QMediaPlayer::volume as Q_PROPERTY does seem to have
     * trouble accessing base class functions directly.
     */
    inline int getAudioVolume() const { return volume(); }
    /**
     * @brief Set audio volume.
     * @param newVolume value between 0 and 100 (audio level in percent)
     * Ensures that volume is inbetween 0 and 100. If this range is exceeded,
     * the volume is set to the lowest and highest allowed value, respectively.
     *
     * Relay info to QMediaPlayer::setVolume as Q_PROPERTY does seem to have
     * trouble accessing base class functions directly.
     *
     * @todo save to config file?
     */
    void setAudioVolume(int newVolume);

    double getProgress() const;

    QString getMediaTitle() const;
    QString getMediaLength();
    QString getTime();

public slots:
    void navigateBack();
    void playPause();
    void stopMusic();
    void playNext();
    void playPrevious();

    void onTimeChanged(int time);
    void onLengthChanged(int length);

private:
    void reset();
    void clearMediaList();
    void readMedia(const QString& path);
    QString timeToString(int time);


    bool mIsPlaying = false;
    bool mHasNext = false;
    bool mHasPrevious = false;
    int mCurrentMediaItemLength = 0;
    int mCurrentTime = 0;
    double mCurrentMediaItemProgress = 0;
    QString mMediaTitle = QString("");
    NavigationItemModel* mCurrentItem = nullptr;
};

#endif // MUSICPLAYER_H