/**
 * Backfill `readingMinutes` on every post from its body (L-07).
 * No schema change — safe to re-run any time.
 *
 * Usage: cd web && npx tsx scripts/backfill-reading-minutes.ts
 */
import { getPayload } from 'payload'
import configPromise from '@payload-config'
import { countLexicalWords } from '../src/lib/lexical'
import { READING_WORDS_PER_MINUTE } from '../src/lib/launch'

const payload = await getPayload({ config: configPromise })

const { docs } = await payload.find({
  collection: 'posts',
  limit: 500,
  depth: 0,
  overrideAccess: true,
})

let updated = 0
for (const post of docs) {
  const words = countLexicalWords(post.content)
  const readingMinutes = Math.max(1, Math.round(words / READING_WORDS_PER_MINUTE))
  if (readingMinutes !== post.readingMinutes) {
    await payload.update({
      collection: 'posts',
      id: post.id,
      data: { readingMinutes },
      overrideAccess: true,
      context: { systemBackfill: true },
    })
    payload.logger.info(`backfill: ${post.slug} ${post.readingMinutes} → ${readingMinutes} (${words} words)`)
    updated += 1
  }
}

payload.logger.info(`backfill complete: ${docs.length} scanned, ${updated} updated`)
// Postgres pool keeps the loop alive — release it so the script exits.
await payload.db.destroy?.()