import RSS from "rss";
import i18n from "./i18n.mjs";
import mime from "mime/lite";

const getRSS = (articles, baseUrl, lang, rssName) => {
  console.log(i18n[lang]["rss"]["title"]);

  const feed_url = encodeURI(
    `${baseUrl}rss${(rssName || "rss_full").includes("full") ? "" : "-main"}.xml`,
  );
  const rssFeed = new RSS({
    title: i18n[lang][rssName || "rss_full"]["title"],
    description: i18n[lang][rssName || "rss_full"]["description"],
    /*
    custom_namespaces: {
      visible_description: i18n[lang][rssName || "rss_full"]["description"],
    },
    */
    site_url: encodeURI("https://ache.one"),
    feed_url,
    canonical: feed_url,
    site_url: encodeURI(baseUrl),
    image_url: encodeURI(`${baseUrl}ache.png`),
    language: lang,
    pubDate: Date(),
    ttl: "1440",
  });

  for (const post of articles.slice(0, 10)) {
    const image_url =
      post.imageUrl[0] != "/" ? `/${post.imageUrl}` : post.imageUrl;

    if (!post.introDesc) {
      throw new Error(`Article intro is empty: ${post.title}`);
    }

    const item = {
      title: post.title,
      description: post.introDesc,
      image_url: encodeURI(image_url),
      url: encodeURI(`${baseUrl}${post.url.slice(1)}`),
      author: "ache",
      date: post.metaData.pubDateISO,
      categories: post.metaData.tags,
      /*
      custom_elements: [
        {
          image: [
            { url: image_url },
            { link: `${baseUrl}${post.url.slice(1)}` },
            { title: post.title },
          ],
        },
      ],
      */
    };

    if (post.imageSize) {
      item.enclosure = {
        url: encodeURI(`${baseUrl}${image_url}`),
        type: mime.getType(image_url),
        length: post.imageSize?.toString(),
      };
    }

    rssFeed.item(item);
  }
  const mainOnly = (rssName || "rss_full").includes("full") ? "" : "_main";

  return rssFeed
    .xml({ indent: false })
    .replace(
      /<\?xml version="1.0" encoding="UTF-8"\?>/g,
      `<?xml version="1.0" encoding="UTF-8"?>\n<?xml-stylesheet type="text/xsl" href="/${lang}/style${mainOnly}.xsl"?>\n`,
    )
    .replace(/xmlns:visible_description/, `visible_description`);
};

export default getRSS;