// The ItemList node of a listing page (index, category, tag, author; D-43):
// the posts shown, added to the page's one JSON-LD @graph through
// vue-seo-layer's useSchemaNode, so the page still has one JSON-LD script.
// The URLs are absolute on the CMS's site URL when the page has a resolve
// answer, else on the request's origin.

import type { JournalPageMeta, JournalPost } from '../utils/types.ts'
import { journalItemList, journalSiteOrigin } from '../utils/seo.ts'

export function useJournalItemList(posts: () => readonly JournalPost[] | null | undefined, meta: () => JournalPageMeta | null | undefined): void {
  const answer = useSeoAnswer()
  const route = useRoute()
  const links = useJournalLinks()
  const request = useRequestURL()
  useSchemaNode(() => {
    const a = answer.value?.action === 'ok' ? answer.value : null
    const origin = journalSiteOrigin(a?.url, request.origin)
    const pageUrl = a?.url && /^https?:\/\//i.test(a.url) ? a.url : `${origin}${route.fullPath}`
    const m = meta()
    const first = m ? (Math.max(1, m.current_page) - 1) * Math.max(1, m.per_page) + 1 : 1
    return journalItemList(pageUrl, origin, (posts() ?? []).map((p) => links.postLink(p.slug)), first)
  })
}