import rss from '@astrojs/rss';
import { getCollection } from 'astro:content';
import { site } from '../site.config';

export async function GET(context: { site?: URL }) {
  const [stories, briefings, episodes] = await Promise.all([
    getCollection('stories', ({ data }) => !data.draft),
    getCollection('briefings', ({ data }) => !data.draft),
    getCollection('episodes', ({ data }) => !data.draft),
  ]);

  const items = [
    ...stories.map((entry) => ({
      title: entry.data.title,
      description: entry.data.description,
      pubDate: entry.data.published,
      link: `/stories/${entry.id}`,
      editorialOrder: entry.data.editorialOrder,
    })),
    ...briefings.map((entry) => ({
      title: entry.data.title,
      description: entry.data.description,
      pubDate: entry.data.published,
      link: `/briefing/${entry.id}`,
      editorialOrder: 1_000,
    })),
    ...episodes.map((entry) => ({
      title: entry.data.title,
      description: entry.data.description,
      pubDate: entry.data.published,
      link: `/podcast/${entry.id}`,
      editorialOrder: 1_000,
    })),
  ]
    .sort((a, b) => b.pubDate.valueOf() - a.pubDate.valueOf() || a.editorialOrder - b.editorialOrder)
    .map(({ editorialOrder: _editorialOrder, ...item }) => item);

  return rss({
    title: `${site.title} ${site.qualifier}`,
    description: site.description,
    site: context.site ?? new URL('https://example.com'),
    items,
    customData: '<language>en-gb</language>',
  });
}