import type { RequestHandler } from './$types';
import { json } from '@sveltejs/kit';
import { getPages, getPosts } from '$lib/cms';
import {
  filterHiddenPosts,
  sortPostsByDate,
  getPostImageUrl,
  postHref,
} from '$lib/blog-utils';
import { ensureTransformedImage } from '$lib/rusty-image';

export type SearchHit = {
  type: 'page' | 'post';
  slug: string;
  href: string;
  title: string;
  subtitle: string;
  excerpt: string;
  image: string | null;
  created: string | null;
  isEvent?: boolean;
  eventDate?: string | null;
};

function pageHref(p: { slug?: string; _slug?: string }): string {
  const raw = (p.slug ?? p._slug ?? '').replace(/^\//, '').trim();
  if (!raw || raw === 'home') return '/';
  return '/' + raw.split('/').filter(Boolean).map(encodeURIComponent).join('/') + '/';
}

export const GET: RequestHandler = async () => {
  let pages: Awaited<ReturnType<typeof getPages>> = [];
  let posts: Awaited<ReturnType<typeof getPosts>> = [];
  try {
    [pages, posts] = await Promise.all([
      getPages(),
      getPosts({ resolve: ['postImage'] }),
    ]);
  } catch {
    return json({ hits: [] satisfies SearchHit[] });
  }

  posts = filterHiddenPosts(sortPostsByDate(posts));

  const postHits: SearchHit[] = await Promise.all(
    posts.map(async (p) => {
      const raw = getPostImageUrl(p.postImage);
      let image: string | null = null;
      if (raw) {
        try {
          image = await ensureTransformedImage(raw, {
            width: 160,
            height: 106,
            fit: 'cover',
            format: 'webp',
          });
        } catch {
          /* optional */
        }
      }
      return {
        type: 'post',
        slug: p.slug ?? p._slug ?? '',
        href: postHref(p),
        title: p.headline ?? p.linkName ?? p._slug ?? '',
        subtitle: p.subheadline ?? '',
        excerpt: p.excerpt ?? '',
        image,
        created: p.created ?? null,
        isEvent: Boolean((p as { isEvent?: boolean }).isEvent),
        eventDate: (p as { eventDate?: string }).eventDate ?? null,
      };
    }),
  );

  const pageHits: SearchHit[] = pages
    .filter((p) => !(p as { hideFromSearch?: boolean }).hideFromSearch)
    .map((p) => ({
      type: 'page',
      slug: p.slug ?? p._slug ?? '',
      href: pageHref(p),
      title:
        (p as { headline?: string }).headline ??
        (p as { title?: string }).title ??
        p._slug ??
        '',
      subtitle: (p as { subheadline?: string }).subheadline ?? '',
      excerpt: (p as { excerpt?: string }).excerpt ?? '',
      image: null,
      created: (p as { created?: string }).created ?? null,
    }));

  return json(
    { hits: [...pageHits, ...postHits] satisfies SearchHit[] },
    { headers: { 'cache-control': 'public, max-age=60, s-maxage=60' } },
  );
};