import { parseJsonIfNeeded } from "../functionUtils";
import * as R from "ramda";

const setTrackType = R.curry(
  (
    type: QuickBrickPlayer.TrackType,
    track: Omit<QuickBrickPlayer.TextTrack, "trackType">
  ) => R.set(R.lensProp("trackType"), type)(track)
);

export const parseLanguageTracks = (
  nativeEvent:
    | QuickBrickPlayer.OnVideoLoadEvent["nativeEvent"]
    | QuickBrickPlayer.OnTracksChangeEvent["nativeEvent"]
): QuickBrickPlayer.TracksState => {
  const textTracks = R.compose(
    R.uniq,
    R.map(setTrackType("text")),
    parseJsonIfNeeded
  )(nativeEvent?.textTracks || []);

  const audioTracks = R.compose(
    R.uniq,
    R.map(setTrackType("audio")),
    parseJsonIfNeeded
  )(nativeEvent?.audioTracks || []);

  return {
    textTracks,
    audioTracks,
    // we are ok with it being undefined
    // @ts-ignore
    audioTrackId: audioTracks?.[nativeEvent?.selectedAudioTrack]?.id,
    // we are ok with it being undefined
    // @ts-ignore
    textTrackId: textTracks?.[nativeEvent?.selectedTextTrack]?.id,
  };
};