// View shaping for SSR payloads. Pages run API rows through these in
// useAsyncData's transform, so the serialized payload carries only what the
// page renders: no raw `content` source, no `translations`, and never an HTML
// body that failed the Journal gate.

import { gateJournalHtml } from './htmlGate.ts'
import type { JournalPost, JournalPostDetail } from './types.ts'

/** A post row as a list or card renders it: without body, source or translations. */
export function toListPost(post: JournalPost): JournalPost {
  return { ...post, content: null, content_html: null, translations: null }
}

/** A post page's data: the gated body, with `content_blocked` set when the gate refused it. */
export interface JournalPostView extends JournalPostDetail {
  content_blocked: boolean
}

/**
 * Formats an API timestamp as a long date for `language` (a BCP 47 tag such
 * as "pl-PL"). UTC on both server and browser, so hydration matches. Returns
 * "" for a missing or invalid value.
 */
export function formatJournalDate(iso: string | null | undefined, language: string): string {
  if (!iso) return ''
  const d = new Date(iso)
  if (Number.isNaN(d.getTime())) return ''
  try {
    return new Intl.DateTimeFormat(language || 'en', { dateStyle: 'long', timeZone: 'UTC' }).format(d)
  } catch {
    return new Intl.DateTimeFormat('en', { dateStyle: 'long', timeZone: 'UTC' }).format(d)
  }
}

export function toPostView(post: JournalPostDetail): JournalPostView {
  const gated = gateJournalHtml(post.content_html)
  return {
    ...post,
    content: null,
    translations: null,
    content_html: gated.html,
    content_blocked: !gated.safe,
    related_posts: (post.related_posts ?? []).map(toListPost),
  }
}