def create_default_config():
  return {
    'input': '/volume1/downloads/music',
    'output': '/volume1/docker/navidrome/music',
    'trash': '/volume1/docker/navidrome/trash',
    'schedule': {
      'enabled': True,
      'type': 'daily',
      'dayOfWeek': '1',
      'time': '02:00',
      'cron': '0 2 * * *'
    },
    'advancedStrategy': {
      'metadataFallback': True,
      'downloadAssets': True,
      'replaceLowQualityDuplicates': False
    },
    'notifications': {
      'dingtalkWebhook': '',
      'dingtalkSecret': '',
      'telegramBotToken': '',
      'telegramChatId': '',
      'emailSmtp': '',
      'emailUser': '',
      'emailPass': '',
      'emailTo': ''
    },
    'metadata': {
      'acoustidUrl': 'https://api.acoustid.org/v2',
      'acoustidClientKey': '',
      'musicbrainz': 'https://musicbrainz.org/ws/2/',
      'netease': 'http://localhost:3000',
      'qq': 'http://localhost:3300',
      'spotifyUrl': 'https://api.spotify.com/v1',
      'spotifyClientId': '',
      'spotifySecret': '',
      'discogsUrl': 'https://api.discogs.com',
      'discogsToken': '',
      'lastfmUrl': 'https://ws.audioscrobbler.com/2.0/',
      'lastfmKey': '',
      'geniusUrl': 'https://api.genius.com',
      'geniusToken': ''
    }
  }


def merge_config(partial_config):
  defaults = create_default_config()
  merged = defaults | {
    key: value for key, value in partial_config.items() if key in defaults
  }

  for nested_key in ('schedule', 'advancedStrategy', 'notifications', 'metadata'):
    nested_value = partial_config.get(nested_key, {})
    if isinstance(nested_value, dict):
      merged[nested_key] = defaults[nested_key] | nested_value

  return merged


def derive_task_state(config):
  return (
    'ready'
    if config['input'].strip() and config['output'].strip() and config['trash'].strip()
    else 'unconfigured'
  )