class Audio(object):
    '''Audio Facade.

    Used for recording audio.
    Use method `start` to start record and `stop` for stop recording.
    To hear what you have just recorded, use method `play`.

    `status` will tell you about current job of the Audio.

    Default path for recording is set in platform implementation.

    .. note::
        On Android the `RECORD_AUDIO` permission is needed.
    '''

    state = 'ready'
    _file_path = ''

    def __init__(self, file_path):
        super(Audio, self).__init__()
        self._file_path = file_path

    def start(self):
        '''Start record.'''
        self._start()
        self.state = 'recording'

    def _start(self):
        raise NotImplementedError()

    def stop(self):
        '''Stop record.'''
        self._stop()
        self.state = 'ready'

    def _stop(self):
        raise NotImplementedError()

    def play(self):
        '''Play current recording.'''
        self._play()
        self.state = 'playing'

    def _play(self):
        raise NotImplementedError()

    @property
    def file_path(self):
        return self._file_path

    @file_path.setter
    def file_path(self, location):
        '''Location of the recording.'''
        assert isinstance(location, (basestring, unicode)), \
            'Location must be string or unicode'
        self._file_path = location