#
# Aura Engine (https://gitlab.servus.at/aura/engine)
#
# Copyright (C) 2017-now() - The Aura Engine Team.
#
# This program is free software: you can redistribute it and/or modify
# it under the terms of the GNU Affero General Public License as published by
# the Free Software Foundation, either version 3 of the License, or
# (at your option) any later version.
#
# This program is distributed in the hope that it will be useful,
# but WITHOUT ANY WARRANTY; without even the implied warranty of
# MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
# GNU Affero General Public License for more details.
#
# You should have received a copy of the GNU Affero General Public License
# along with this program.  If not, see <http://www.gnu.org/licenses/>.

# Called when some new metadata info is available
def on_metadata_notification(meta) =
  # FIXME For some reason stream channels do not pass the `source` property in meta
  channel_name = meta["source"]
  source_type = eval_source_type(channel_name)

  log(
    level=5,
    label="metadata",
    "Raw metadata before POST:\n\n #{meta}\n\n"
  )

  show_name = ref(list.assoc(default="", "show_name", meta))
  show_id = ref(list.assoc(default="", "show_id", meta))
  timeslot_id = list.assoc(default="-1", "timeslot_id", meta)
  playlist_id = list.assoc(default="-1", "playlist_id", meta)
  playlist_track_num = list.assoc(default="", "playlist_item", meta)
  track_start = list.assoc(default=meta["track_start"], "on_air", meta)
  track_duration = get_meta_track_duration(meta)
  track_type = eval_track_type(meta["track_type"], meta["source"])
  track_artist = list.assoc(default=meta["track_artist"], "artist", meta)
  track_album = list.assoc(default=meta["track_album"], "album", meta)
  track_title = list.assoc(default=meta["track_title"], "title", meta)

  if
    source_type == "fallback"
  then
    log(
      level=3,
      label="metadata",
      "Detected FALLBACK channel `#{channel_name}` playing (Show ID: #{fallback_show_id()})"
    )
    show_name := fallback_show_name()
    show_id := fallback_show_id()
  end

  playlog =
    [
      ("show_id", show_id()),
      ("show_name", show_name()),
      ("timeslot_id", timeslot_id),
      ("playlist_id", playlist_id),
      ("track_type", track_type),
      ("track_start", track_start),
      ("track_duration", "#{track_duration}"),
      ("track_title", track_title),
      ("track_album", track_album),
      ("track_artist", track_artist),
      ("track_num", playlist_track_num),
      ("log_source", engine_id)
    ]
  if
    playlog["show_id"] == ""
  then
    log(
      level=3,
      label="metadata",
      "Skip posting playlog because of missing show ID!"
    )
  else
    post_playlog(engine_api_playlog, playlog)
  end
end