"use client";

import { useEffect, useState } from "react";
import { goToAdminLogin } from "@/lib/admin-auth";

/**
 * This app has no login form: signing in happens once, on admin.nachklang.art,
 * for every Nachklang app. Copied from nachklang-feedback.
 *
 * The route exists as a forwarder so proxy.ts has a stable path on this origin
 * to send signed-out visitors to, rather than building an external URL inside
 * the proxy.
 */
export default function AdminLoginPage() {
  // Read from the URL directly rather than with useSearchParams(): this page is
  // prerendered, and useSearchParams() opts the whole route into client-side
  // rendering unless it sits inside a <Suspense> boundary.
  const [redirect] = useState(() =>
    typeof window === "undefined" ? null : new URLSearchParams(window.location.search).get("redirect"),
  );

  useEffect(() => {
    // Passed straight through; the admin app validates it against its own
    // origin allow-list, and a second check here could only drift from that.
    goToAdminLogin(redirect || "/admin");
  }, [redirect]);

  return (
    <div className="flex min-h-screen flex-col items-center justify-center px-6 text-center">
      <p className="text-sm text-muted-foreground">Weiterleitung zur Nachklang-Anmeldung …</p>
    </div>
  );
}