-- fix_missing_total_referrals_column.sql
--
-- مشکل: php artisan migrate می‌گوید Nothing to migrate
-- ولی register خطای Unknown column 'total_referrals' می‌دهد.
--
-- علت: baseline_migrations.sql این migration را در جدول migrations ثبت کرده
--       بدون اینکه ALTER TABLE واقعاً اجرا شود.
--
-- راه‌حل ترجیحی (بدون SQL دستی):
--   git pull
--   php artisan migrate
--   (migration: 2026_06_25_000001_ensure_total_referrals_column_on_customers_table.php)
--
-- فقط اگر migrate در دسترس نیست، این فایل را مستقیم روی MySQL اجرا کنید:
--   mysql -u USER -p DATABASE_NAME < database/sql/fix_missing_total_referrals_column.sql

START TRANSACTION;

SET @db = DATABASE();

-- 1) ستون را اضافه کن (اگر نبود)
SET @sql = IF(
    (SELECT COUNT(*) FROM information_schema.COLUMNS
        WHERE TABLE_SCHEMA = @db AND TABLE_NAME = 'customers' AND COLUMN_NAME = 'total_referrals') = 0,
    IF(
        (SELECT COUNT(*) FROM information_schema.COLUMNS
            WHERE TABLE_SCHEMA = @db AND TABLE_NAME = 'customers' AND COLUMN_NAME = 'referral_to_id') > 0,
        'ALTER TABLE `customers` ADD COLUMN `total_referrals` INT UNSIGNED NOT NULL DEFAULT 0 AFTER `referral_to_id`',
        'ALTER TABLE `customers` ADD COLUMN `total_referrals` INT UNSIGNED NOT NULL DEFAULT 0'
    ),
    'SELECT ''total_referrals already exists'' AS info'
);
PREPARE stmt FROM @sql;
EXECUTE stmt;
DEALLOCATE PREPARE stmt;

-- 2) شمارنده معرف‌ها را با داده واقعی هم‌تراز کن
UPDATE `customers` AS c
SET c.`total_referrals` = (
    SELECT COUNT(*)
    FROM (
        SELECT `id`
        FROM `customers`
        WHERE `referral_to_id` = c.`referral_id`
          AND `deleted_at` IS NULL
    ) AS r
)
WHERE c.`referral_id` IS NOT NULL
  AND TRIM(c.`referral_id`) <> '';

COMMIT;

-- 3) تأیید
SELECT
    CASE
        WHEN COUNT(*) > 0 THEN 'OK: total_referrals exists'
        ELSE 'ERROR: column still missing'
    END AS status
FROM information_schema.COLUMNS
WHERE TABLE_SCHEMA = DATABASE()
  AND TABLE_NAME = 'customers'
  AND COLUMN_NAME = 'total_referrals';