import type { Metadata } from 'next';
import { Suspense } from 'react';
import type { PhotoGallery, Photo } from '@/lib/api';
import GalleryClient from './GalleryClient';

const photoApiUrl = process.env.PHOTO_API_URL || 'http://localhost:3003';

interface PageProps {
  params: { slug: string };
}

// Public galleries render server-side (SEO + fast first paint); link and
// ticket galleries return null here and are fetched client-side with the
// viewer's token / share token.
async function getPublicGallery(
  slug: string
): Promise<{ gallery: PhotoGallery; photos: Photo[] } | null> {
  try {
    const res = await fetch(
      `${photoApiUrl}/api/photos/public/galleries/${encodeURIComponent(slug)}`,
      { next: { revalidate: 300 } }
    );
    if (!res.ok) return null;
    return await res.json();
  } catch {
    return null;
  }
}

export async function generateMetadata({ params }: PageProps): Promise<Metadata> {
  const data = await getPublicGallery(params.slug);
  if (!data) {
    return { title: 'Photo Gallery', robots: { index: false } };
  }
  return {
    title: `${data.gallery.title} – Photos`,
    description:
      data.gallery.description ||
      `Photos from ${data.gallery.title}, a Spanglish language exchange event in Asunción.`,
  };
}

export default async function GalleryPage({ params }: PageProps) {
  const initial = await getPublicGallery(params.slug);
  return (
    // Suspense boundary required by useSearchParams() in the client child.
    <Suspense>
      <GalleryClient slug={params.slug} initial={initial} />
    </Suspense>
  );
}