type Image = {
  number?: number;
  episode?: number;
  img: string;
  title: string;
  description: string;
};

type Episode = {
  number: number;
  img?: string;
  title?: string;
  description?: string;
};

type ProviderEpisodes = {
  episodes: Episode[];
};

async function appendMetaToEpisodes(
  episodesData: ProviderEpisodes[],
  images: Image[]
): Promise<ProviderEpisodes[]> {
  // Create a dictionary for faster lookup of images based on episode number
  const episodeImages: { [key: number]: Image } = {};
  images.forEach((image) => {
    image.episode && (episodeImages[image.episode] = image);
    image.number && (episodeImages[image.number] = image);
  });

  // Iterate through each provider's episodes data
  for (const providerEpisodes of episodesData) {
    // Iterate through each episode in the provider's episodes data
    for (const episode of providerEpisodes.episodes) {
      // Get the episode number
      const episodeNumber = episode.number;

      // Check if there is an image available for this episode number
      if (episodeImages[episodeNumber]) {
        // Append the image URL to the episode data
        episode.img = episodeImages[episodeNumber].img;
        episode.title = episodeImages[episodeNumber].title;
        episode.description = episodeImages[episodeNumber].description;
      }
    }
  }

  return episodesData;
}

export default appendMetaToEpisodes;