import type { ArticleSummary, Category, Paginated } from '#shared/types/blog'

interface RawArticleSummary {
  id: string
  title: string
  slug: string
  publishedAt: string
  cover: string
  coverAlt: string | null
  expand?: { category?: Category }
}

function toSummary(raw: RawArticleSummary): ArticleSummary {
  return {
    title: raw.title,
    slug: raw.slug,
    publishedAt: raw.publishedAt,
    cover: toMediaImage('articles', raw.id, raw.cover, raw.coverAlt),
    category: raw.expand?.category ?? null,
  }
}

export default defineEventHandler(async (event): Promise<Paginated<ArticleSummary>> => {
  const query = getQuery(event)
  const page = pageParam(query.page)
  const category = typeof query.category === 'string' ? query.category : null

  const filter = category
    ? `&filter=${encodeURIComponent(`category.slug = ${quote(category)}`)}`
    : ''

  const response = await pbFetch<PbList<RawArticleSummary>>(
    `/api/collections/articles/records?fields=${ARTICLE_SUMMARY_FIELDS}&expand=category&sort=-publishedAt&${pagination(page)}${filter}`
  )

  return {
    items: response.items.map(toSummary),
    page: response.page,
    pageCount: response.totalPages,
    total: response.totalItems,
  }
})