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

/** Hours a complete provisional release stays open for its window's continuation before it is settled here. */
export const SETTLE_COMPLETE_HOURS = 6

/**
 * Provisional releases (REBUILD.md, "Voyager 3: window indexing", 2): a release the window hadn't closed on at a
 * lease's end is written with `settled_at` null, for the window's continuation to finish. A continuation may
 * never come (the range-lease path of the first run left 109k such rows, LOG.md (118); a group's next lease is
 * hours away), and the catalog shows the release as still collecting. A complete one — every file its counter
 * announced found — can't gain a counted file any more, so once it has been quiet for SETTLE_COMPLETE_HOURS it is
 * settled here, as the finish would: `settled_at` set (the judge's trigger fires on it), its waiting probe
 * candidates made claimable. Incomplete ones keep waiting: the continuation adds their files.
 */
class Settler {
  async settleComplete(quietHours = SETTLE_COMPLETE_HOURS): Promise<number> {
    return db.transaction(async (trx) => {
      const { rows } = await trx.rawQuery(
        `UPDATE releases SET settled_at = now()
         WHERE settled_at IS NULL AND complete
           AND first_seen_at < now() - make_interval(hours => ?) AND last_posted_at < now() - make_interval(hours => ?)
         RETURNING id`,
        [quietHours, quietHours]
      )
      if (rows.length > 0)
        await trx.rawQuery(
          `UPDATE probe_candidates pc SET ready = true, unreadable = NOT r.readable FROM releases r
           WHERE pc.release_id = ANY(?::bigint[]) AND r.id = pc.release_id AND pc.status = 'waiting' AND NOT pc.ready`,
          [rows.map((r: { id: string }) => Number(r.id))]
        )
      return rows.length
    })
  }
}

export default new Settler()