/**
 * The Bandcamp route.
 *
 * @module
 */

import { Router } from "@oak/oak";
import type { APIResponse } from "../../shared/api.ts";
import { resolveBandcamp } from "../remote/bandcamp-streams.ts";
import type { Tralbum } from "../../shared/player.ts";

/**
 * The Bandcamp route, for the native player:
 *
 * - `GET /api/bandcamp/tracks?url=&force=` — public. Resolves a Bandcamp page
 *   to its streamable tracks, at play time; `force=1` bypasses the cache.
 */
const bandcampRouter: Router = new Router();

// Public: it only reads a public page and returns URLs the same page already
// hands any visitor. Errors are thrown as APIException and rendered by
// errorMiddleware; the client treats any failure as "fall back to the iframe
// embed".
bandcampRouter.get("/api/bandcamp/tracks", async (ctx) => {
  const url = ctx.request.url.searchParams.get("url") ?? "";
  const force = ctx.request.url.searchParams.get("force") === "1";

  const responseBody: APIResponse<Tralbum> = {
    success: true,
    data: await resolveBandcamp(url, { force }),
  };

  // Private: the signed URLs in the body are per-fetch, so they must not be
  // held in a shared cache. Well inside the 24h signature life either way.
  ctx.response.headers.set("Cache-Control", "private, max-age=3600");
  ctx.response.body = responseBody;
});

export default bandcampRouter;