import ics from 'ics';

export const albumReleasesCalendar = (collection) => {
  const collectionData = collection.getAll()[0];
  const { data } = collectionData;
  const {
    albumReleases: { all },
    globals: { url }
  } = data;

  if (!all || all.length === 0) return '';

  const events = all
    .map((album) => {
      const date = new Date(album.release_date);

      if (isNaN(date.getTime())) return null;

      const albumUrl = album.url?.includes('http') ? album.url : `${url}${album.url}`;
      const artistUrl = album.artist.url?.includes('http')
        ? album.artust.url
        : `${url}${album.artist.url}`;

      return {
        start: [date.getFullYear(), date.getMonth() + 1, date.getDate()],
        startInputType: 'local',
        startOutputType: 'local',
        title: `Release: ${album.artist.name} - ${album.title}`,
        description: `Check out this new album release: ${albumUrl}. Read more about ${album.artist.name} at ${artistUrl}`,
        url: albumUrl,
        uid: `${album.release_timestamp}-${album.artist.name}-${album.title}`
      };
    })
    .filter((event) => event !== null);

  const { error, value } = ics.createEvents(events, {
    calName: 'Album releases calendar • coryd.dev'
  });

  if (error) {
    console.error('Error creating events: ', error);
    return '';
  }

  return value;
};