// Anonymous server-side transport. Expected HTTP/network failures are values;
// callers can keep the search form usable without falling back to sample data.
export function createPaperTransport(origin, requestUpstream = fetch) {
  return async function request(path) {
    let response;
    try {
      response = await requestUpstream(new URL(path, origin.replace(/\/$/, "") + "/"), {
        cache: "no-store", signal: AbortSignal.timeout(12000), redirect: "error",
      });
    } catch (error) {
      return { ok: false, status: error?.name === "TimeoutError" || error?.name === "AbortError" ? 504 : 503 };
    }
    if (!response.ok) return { ok: false, status: response.status };
    try { return { ok: true, data: await response.json() }; }
    catch { return { ok: false, status: 502 }; }
  };
}