const RETENTION_DAYS = 30;

module.exports = function createActivityOrphanCleanup(db) {
  async function deleteFromDB(id, user) {
    const now = new Date();
    const nowIso = now.toISOString();

    const rec = await db('activities')
      .where({ id, user })
      .first();

    if (!rec) return false;

    // Primo rilevamento: soft delete.
    if (!rec.deleted_at) {
      await db('activities')
        .where({ id, user })
        .update({
          deleted_at: nowIso,
          updated_at: nowIso,
        });

      console.log(`🟡 Soft delete attività orfana: ${id}`);
      return true;
    }

    // Hard delete solo dopo il periodo di retention.
    const deletedAt = new Date(rec.deleted_at);
    const ageMs = now.getTime() - deletedAt.getTime();
    const retentionMs = RETENTION_DAYS * 24 * 60 * 60 * 1000;

    if (!Number.isFinite(deletedAt.getTime()) || ageMs <= retentionMs) {
      console.log(`🟡 Attività in retention: ${id}`);
      return true;
    }

    await db.transaction(async (trx) => {
      await trx('activities')
        .where({ id, user })
        .del();

      await trx('deleted_hard_activities')
        .insert({
          id,
          user,
          deleted_at: nowIso,
        })
        .onConflict('id')
        .merge();
    });

    console.log(`🔴 Hard delete attività orfana: ${id}`);
    return true;
  }

  return { deleteFromDB };
};