import db from '@adonisjs/lucid/services/db'

/** Noted releases taken per transaction. */
const BATCH = 2000

/**
 * Release completeness (D24) for releases whose files or par2 listing
 * changed: triggers only note them in release_dirty (a release can be noted
 * thousands of times between sweeps), and gc:scheduler recomputes each
 * noted release once every RELEASE_COMPLETE_INTERVAL_MS (LOG.md 2026-10-06 (6)).
 */
class ReleaseCompleteness {
  /** Recomputes all noted releases; returns how many distinct releases were checked. */
  async sweep(): Promise<number> {
    let checked = 0
    for (;;) {
      const done = await db.transaction(async (trx) => {
        // Taken and recomputed in one transaction: a failure leaves the notes for the next sweep.
        const { rows } = await trx.rawQuery(
          `DELETE FROM release_dirty WHERE ctid = ANY(ARRAY(SELECT ctid FROM release_dirty LIMIT ?)) RETURNING release_id`,
          [BATCH]
        )
        const ids: number[] = [...new Set<number>(rows.map((row: { release_id: string }) => Number(row.release_id)))]
        if (ids.length > 0) {
          await trx.rawQuery(`SELECT recompute_release_complete(id) FROM unnest(?::bigint[]) AS id`, [ids])
        }
        checked += ids.length
        return rows.length < BATCH
      })
      if (done) return checked
    }
  }
}

export default new ReleaseCompleteness()