/**
 * The YouTube route, for the player's tracklist.
 *
 * - `GET /api/youtube/playlist?list=` — public. Resolves a YouTube playlist id
 *   to its tracklist (titles and lengths).
 *
 * @module
 */

import { Router } from "@oak/oak";
import type { APIResponse } from "../../shared/api.ts";
import { resolveYouTubePlaylist } from "../remote/youtube-playlist.ts";
import type { YouTubePlaylist } from "../../shared/player.ts";

/** The router serving the endpoints the module doc lists. */
const youtubeRouter: Router = new Router();

// Public, like /api/bandcamp/tracks: it only reads a public page. The client
// treats any failure as "show the embed without a tracklist".
youtubeRouter.get("/api/youtube/playlist", async (ctx) => {
  const listId = ctx.request.url.searchParams.get("list") ?? "";
  const responseBody: APIResponse<YouTubePlaylist> = {
    success: true,
    data: await resolveYouTubePlaylist(listId),
  };

  ctx.response.headers.set("Cache-Control", "public, max-age=3600");
  ctx.response.body = responseBody;
});

export default youtubeRouter;