import { Feed } from 'feed';
import parseMarkdown from '../src/parseMarkdown.js';
import fetch from 'node-fetch';

export default async function ({ app, route, res }) {
    if (!process.server || route.path !== '/blog.atom') {
        return;
    }

    const posts = await (await fetch(`${process.env.BASE_URL}/api/blog`)).json();

    const feed = new Feed({
        title: `${app.$t('title')} • ${app.$t('links.blog')}`,
        description: app.$t('description'),
        id: process.env.BASE_URL,
        link: `${process.env.BASE_URL}/blog.atom`,
        language: app.$config.locale,
        image: `${process.env.BASE_URL}/icon.png`,
        favicon: `${process.env.BASE_URL}/icon.png`,
        updated: new Date(posts[0].date),
    });

    for (const post of posts) {
        const parsed = await parseMarkdown(
            (await import(`../locale/${app.$config.locale}/blog/${post.slug}.md`)).default,
            app.$translator,
        );

        feed.addItem({
            title: post.title,
            id: `${process.env.BASE_URL}/${app.$config.links.blogRoute}/${post.slug}`,
            link: `${process.env.BASE_URL}/${app.$config.links.blogRoute}/${post.slug}`,
            description: parsed.intro,
            content: parsed.content,
            author: post.authors.map((author) => ({
                name: author,
                link: author.startsWith('@') ? `${process.env.BASE_URL}/${author}` : undefined,
            })),
            date: new Date(post.date),
            image: post.hero ? `${process.env.BASE_URL}${post.hero}` : undefined,
        });
    }


    res.setHeader('Content-Type', 'application/rss+xml; charset=utf-8');
    res.end(feed.atom1());

    return new Promise(() => {}); // halt execution
}