-- Rollback: re-deduct commission for users with pending (status=0) withdrawals.
-- This re-applies the OLD behaviour where commission is deducted on application.
-- Only run this if you are rolling back to the old code; do NOT run against
-- the new code or commission will be double-deducted on approval.

UPDATE `user` u
JOIN (
    SELECT user_id, COALESCE(SUM(amount), 0) AS pending_total
    FROM withdrawals
    WHERE status = 0
    GROUP BY user_id
) p ON u.id = p.user_id
SET u.commission = u.commission - p.pending_total
WHERE p.pending_total > 0;

-- Remove the migration log entries written by the up migration.
DELETE FROM system_log
WHERE type = 3
  AND content LIKE '%migration: refund pending withdrawal commission (HIF-22)%';
