import rss, { type RSSFeedItem } from "@astrojs/rss";
import { getCollection } from "astro:content";
import type { APIContext, APIRoute } from "astro";
import { Blog } from "../lib/collection/schemas.ts";
import { getFirstAuthorEmail } from "../lib/collection/helpers.ts";
import { env } from "../lib/environment.ts";

const { PUBLIC_SITE_TITLE, PUBLIC_SITE_DESCRIPTION, PUBLIC_SITE_URL } = env;

export const GET: APIRoute = async (context: APIContext): Promise<Response> => {
  const posts = await getCollection("blog");
  return rss({
    title: PUBLIC_SITE_TITLE,
    description: PUBLIC_SITE_DESCRIPTION,
    site: context.site ?? PUBLIC_SITE_URL,
    items: await Promise.all(posts.map(async (post): Promise<RSSFeedItem> => {
      const { id, rendered } = post;
      const blog = Blog.parse(post.data);

      const { title, dateUpdated, dateCreated } = blog;
      return {
        description: "description" in blog ? blog.description : undefined,
        title,
        author: await getFirstAuthorEmail(post),
        content: rendered?.html,
        pubDate: dateUpdated ?? dateCreated,
        categories: "keywords" in blog ? blog.keywords : undefined,
        link: `/blog/read/${id}/`,
      };
    })),
  });
};