// Ruft die Cron-Route alle 15 Minuten im Production-Prozess auf.
// Fehler werden nur geloggt; der nächste Intervall versucht es erneut.
let timer: ReturnType<typeof setInterval> | null = null;

export function startScheduler(baseUrl: string, intervalMs = 15 * 60 * 1000): () => void {
  if (timer) return stopScheduler;
  const secret = process.env.CRON_SECRET ?? "";
  const run = async () => {
    try {
      const res = await fetch(`${baseUrl}/api/cron/check`, {
        headers: { "x-cron-secret": secret },
      });
      if (!res.ok) console.error(`cron check failed: ${res.status}`);
    } catch (e) {
      console.error("cron check error", e);
    }
  };
  void run();
  timer = setInterval(() => void run(), intervalMs);
  return stopScheduler;
}

export function stopScheduler(): void {
  if (timer) {
    clearInterval(timer);
    timer = null;
  }
}

export function ensureSchedulerStarted(): void {
  if (process.env.NODE_ENV !== "production") return;
  if (timer) return;
  const baseUrl = process.env.APP_URL ?? `http://localhost:${process.env.PORT ?? 3000}`;
  startScheduler(baseUrl);
}