import mpv

class Player:
    def __init__(self):
        self._player = mpv.MPV()
        self._player.loop = "inf"
        self._playingStateCallback = self._dummyCallback
        self._volumeCallback = self._dummyCallback
        self._player.observe_property("pause", lambda name, value: self._playingStateCallback())
        self._player.observe_property("volume", lambda name, value: self._volumeCallback())

    def _dummyCallback(self):
        pass

    def play(self):
        self._player.pause = False

    def pause(self):
        self._player.pause = True

    def isPlaying(self):
        return not self._player.pause

    def setPlaybackRate(self, rate):
        self._player.speed = rate

    def getPlaybackRate(self):
        return self._player.speed

    def setPlaybackPosition(self, position):
        self._player.percent_pos = int(position * 100)

    def getPlaybackPosition(self):
        return float(self._player.percent_pos or 0.0) / 100.0

    def setPlaybackVolume(self, volume):
        self._player.volume = int(volume * 100)

    def getPlaybackVolume(self):
        return float(self._player.volume) / 100.0

    def setCurrentSong(self, path):
        self.pause()
        self._player.play(str(path))

    def setPlayingStateChangedCallback(self, callback):
        self._playingStateCallback = callback

    def setPlaybackVolumeChangedCallback(self, callback):
        self._volumeCallback = callback