from __future__ import unicode_literals

import logging

from mopidy import backend

import pykka

from . import client
from . import library


logger = logging.getLogger(__name__)


class FunkwhaleBackend(pykka.ThreadingActor, backend.Backend):

    def __init__(self, config, audio):
        super(FunkwhaleBackend, self).__init__()
        self.config = config
        self.remote = client.FunkwhaleClient(config)
        self.library = library.FunkwhaleLibraryProvider(backend=self)
        self.playback = FunkwhalePlaybackProvider(audio=audio, backend=self)

        self.uri_schemes = ['funkwhale', 'fw']

    def on_start(self):
        username = self.remote.username
        if username is not None:
            logger.info('Logged in to Funkwhale as "%s" on "%s"', username, self.config['funkwhale']['url'])
        else:
            logger.info('Using "%s" anonymously', self.config['funkwhale']['url'])


class FunkwhalePlaybackProvider(backend.PlaybackProvider):
    def translate_uri(self, uri):
        _, id = library.parse_uri(uri)
        track = self.backend.remote.http_client.get_track(id)

        if track is None:
            return None
        url = track['listen_url']
        if url.startswith('/'):
            url = self.backend.config['funkwhale']['url'] + url
        return url