'use client';

import { useEffect, useState } from 'react';
import { authApi, wishlistsApi } from '@/lib/api';

type Status = 'checking' | { kind: 'ok'; guestName: string } | 'denied';

export default function GuestGuard({ children }: { children: React.ReactNode }) {
  const [status, setStatus] = useState<Status>('checking');

  useEffect(() => {
    let cancelled = false;
    (async () => {
      const usr = new URL(window.location.href).searchParams.get('usr');
      try {
        if (usr) {
          await authApi.session({ usr });
        }
        const who = await authApi.whoami();
        if (cancelled) return;
        if (who.role === 'admin' || who.role === 'guest') {
          setStatus({ kind: 'ok', guestName: who.guest?.name ?? 'admin' });
        } else {
          const slug = window.location.pathname.split('/').filter(Boolean)[0];
          if (slug) {
            const wishlist = await wishlistsApi.getBySlug(slug);
            if (cancelled) return;
            if (wishlist.isPublic) {
              setStatus({ kind: 'ok', guestName: 'visitante' });
              return;
            }
          }
          setStatus('denied');
        }
      } catch {
        if (!cancelled) setStatus('denied');
      }
    })();
    return () => { cancelled = true; };
  }, []);

  if (status === 'checking') return <div className="min-h-screen flex items-center justify-center text-gray-500">Verificando convite…</div>;
  if (status === 'denied') return <div className="min-h-screen flex items-center justify-center text-center px-6">
    <div>
      <h1 className="text-2xl font-bold mb-2">Convite necessário</h1>
      <p className="text-gray-500">Esta lista é por convite. Use o link que recebeu.</p>
    </div>
  </div>;

  return <>{children}</>;
}