// Small fetch wrapper: non-2xx responses become HttpErrors carrying the
// status code so callers can branch on 401s; 2xx responses are parsed as JSON.

export class HttpError extends Error {
  readonly status: number;

  constructor(what: string, status: number, body: string) {
    super(`${what} failed: ${status}: ${body}`);
    this.status = status;
  }
}

export async function fetchJson<T>(
  what: string,
  url: string | URL,
  init?: RequestInit,
): Promise<T> {
  const resp = await fetch(url, {
    ...init,
    signal: init?.signal ?? AbortSignal.timeout(30_000),
  });
  if (!resp.ok) throw new HttpError(what, resp.status, await resp.text());
  return resp.json() as Promise<T>;
}