-- چند پیام‌رسان پشتیبانی — migrate از support_messenger + support_messenger_id

INSERT INTO `settings` (`key`, `value`, `title_fa`, `type`, `can_edit`, `is_active`, `description`, `created_at`, `updated_at`)
SELECT
  'support_messengers',
  '',
  'پیام‌رسان‌های پشتیبانی',
  'longtext',
  1,
  1,
  'JSON: [{"messenger":"bale","id":"username"}] — واتساپ: شماره با کد کشور',
  NOW(),
  NOW()
WHERE NOT EXISTS (SELECT 1 FROM `settings` WHERE `key` = 'support_messengers' LIMIT 1);

UPDATE `settings` AS sm
JOIN (
  SELECT
    TRIM(COALESCE(
      (SELECT `value` FROM `settings` WHERE `key` = 'support_messenger_id' LIMIT 1),
      ''
    )) AS legacy_id,
    TRIM(COALESCE(
      NULLIF((SELECT `value` FROM `settings` WHERE `key` = 'support_messenger' LIMIT 1), ''),
      'bale'
    )) AS legacy_type
) AS src
SET sm.`value` = CONCAT(
  '[{"messenger":"', REPLACE(src.legacy_type, '"', '\\"'), '","id":"', REPLACE(src.legacy_id, '"', '\\"'), '"}]'
)
WHERE sm.`key` = 'support_messengers'
  AND TRIM(COALESCE(sm.`value`, '')) = ''
  AND src.legacy_id <> '';