import { Metadata } from 'next';
import { PublicLayout } from '@/components/layout/public/public-layout';
import { createHelpers } from '@/lib/trpc/server';
import { PostOrderEnum } from '@/config/enums';
import { HydrationBoundary, dehydrate } from '@tanstack/react-query';
import EmneList from './_components/emne-list';
import EmneHeader from './_components/emne-header';
import { adaptTopicToContentData } from '@/lib/meta-tags';
import { buildMetadataFromContent, generateMetaTags } from '@/lib/meta-tags/server';

type Props = {
  params: Promise<{ slug: string }>;
};

export async function generateMetadata({ params }: Props): Promise<Metadata> {
  const { slug } = await params;

  const helpers = await createHelpers();
  const tag = await helpers.tags.get.fetch({ slug });

  if (!tag) {
    return {
      title: `${slug?.replace(/-/g, ' ')} | Magasinet KBH`,
      description: 'Topic page on Magasinet KBH'
    };
  }

  const contentData = adaptTopicToContentData({
    name: tag.name,
    slug: tag.slug
  });

  return await buildMetadataFromContent(contentData);
}

export default async function EmnePage({ params }: Props) {
  const { slug } = await params;
  const helpers = await createHelpers();

  const [tag] = await Promise.all([
    helpers.tags.get.fetch({ slug }),
    helpers.posts.list.prefetch({
      with: ['project', 'tags', 'review', 'primaryTag', 'author', 'vision'],
      tagSlug: slug,
      limit: 8,
      orderBy: PostOrderEnum.PUBLISHED_AT
    }),
    helpers.posts.count.prefetch({
      tagSlug: slug
    })
  ]);

  const contentData = tag ? adaptTopicToContentData({ name: tag.name, slug: tag.slug }) : null;
  const { jsonLd } = contentData ? await generateMetaTags(contentData) : { jsonLd: undefined };

  return (
    <PublicLayout>
      {jsonLd && (
        <script
          type="application/ld+json"
          dangerouslySetInnerHTML={{
            __html: JSON.stringify(jsonLd).replace(/</g, '\\u003c')
          }}
        />
      )}
      <HydrationBoundary state={dehydrate(helpers.queryClient)}>
        <EmneHeader slug={slug} />
        <EmneList slug={slug} />
      </HydrationBoundary>
    </PublicLayout>
  );
}