#!/usr/bin/env node
/**
 * Lit chaque slides/<slug>/meta.json, écrit presentations.json, index featured, liste + fiches.
 * Retire les fiches portal obsolètes.
 *
 * TALKS_ROOT (optionnel) : racine du dépôt — tests.
 */
import fs from 'node:fs'
import path from 'node:path'
import { fileURLToPath } from 'node:url'
import { sitePath } from './site-base.mjs'
import {
  readAllMeta,
  generateListPageMarkdown,
  generateDetailPageMarkdown,
  patchIndexFeaturedContent,
} from './presentation-contracts.mjs'

const __dirname = path.dirname(fileURLToPath(import.meta.url))
const root = process.env.TALKS_ROOT ? path.resolve(process.env.TALKS_ROOT) : path.resolve(__dirname, '..')
const slidesRoot = path.join(root, 'slides')
const portalData = path.join(root, 'portal', '.vitepress', 'data')
const presentationsDir = path.join(root, 'portal', 'presentations')

function pruneStalePresentationDirs(items) {
  const keep = new Set(items.map((p) => p.slug))
  if (!fs.existsSync(presentationsDir)) return
  for (const d of fs.readdirSync(presentationsDir, { withFileTypes: true })) {
    if (!d.isDirectory()) continue
    if (!keep.has(d.name)) {
      fs.rmSync(path.join(presentationsDir, d.name), { recursive: true, force: true })
      console.warn(`[sync] fiche retirée (plus de slides/${d.name}/): presentations/${d.name}/`)
    }
  }
}

function main() {
  const items = readAllMeta(slidesRoot)
  fs.mkdirSync(portalData, { recursive: true })
  fs.writeFileSync(path.join(portalData, 'presentations.json'), JSON.stringify(items, null, 2), 'utf8')

  const indexPath = path.join(root, 'portal', 'index.md')
  if (fs.existsSync(indexPath)) {
    const raw = fs.readFileSync(indexPath, 'utf8')
    const { ok, content } = patchIndexFeaturedContent(raw, items, sitePath)
    if (!ok) {
      console.warn('[sync] marqueurs FEATURED_START / FEATURED_END absents ou invalides dans portal/index.md')
    } else {
      fs.writeFileSync(indexPath, content, 'utf8')
    }
  }

  fs.mkdirSync(presentationsDir, { recursive: true })
  fs.writeFileSync(path.join(presentationsDir, 'index.md'), generateListPageMarkdown(items, sitePath), 'utf8')

  for (const p of items) {
    const dir = path.join(presentationsDir, p.slug)
    fs.mkdirSync(dir, { recursive: true })
    fs.writeFileSync(path.join(dir, 'index.md'), generateDetailPageMarkdown(p, sitePath), 'utf8')
  }

  pruneStalePresentationDirs(items)

  console.log(`[sync] ${items.length} présentation(s) — portal mis à jour`)
}

main()