import { SITE_INTRO, SITE_TITLE, fetchIndexDocs, renderIndexSections, type IndexDoc } from '@/lib/llms'
import { freeEarlyAccess } from '@/lib/launch'
import { formatDate } from '@/lib/format'
import { lexicalToPlain } from '@/lib/lexical'

export const dynamic = 'force-dynamic'

export async function GET(): Promise<Response> {
  const early = freeEarlyAccess()
  // Public read path: the content field's read ACL already decides body
  // availability — with early access every published body passes; with billing
  // on, VIP bodies come back undefined and are listed members-only.
  const docs = await fetchIndexDocs(true) as (IndexDoc & { content?: unknown })[]

  const parts: string[] = [
    `# ${SITE_TITLE}`,
    '',
    `> ${SITE_INTRO}`,
    '',
    renderIndexSections(docs, !early),
    '---',
    '',
    '# الأدلة الكاملة',
    '',
  ]

  for (const doc of docs) {
    const vipOnly = !early && doc.access === 'vip'
    const suffix = vipOnly ? ' (دليل للأعضاء)' : ''
    parts.push(`## ${doc.title}${suffix}`, '')
    parts.push(`URL: /posts/${doc.slug}`, '')
    if (doc.dek) parts.push(doc.dek, '')
    if (doc.updatedAt && doc.publishedAt && doc.updatedAt !== doc.publishedAt) {
      parts.push(`حُدّث: ${formatDate(doc.updatedAt)}`, '')
    }
    if (vipOnly) {
      parts.push('هذا الدليل متاح للأعضاء فقط. العضوية: /subscription', '')
    } else if (typeof doc.content === 'object' && doc.content !== null) {
      parts.push(lexicalToPlain(doc.content), '')
    }
    parts.push('---', '')
  }

  return new Response(parts.join('\n'), { headers: { 'content-type': 'text/plain; charset=utf-8' } })
}