-- Add subscription_user_id column to order table (idempotent)
SET @col_exists = (SELECT COUNT(*) FROM INFORMATION_SCHEMA.COLUMNS WHERE TABLE_SCHEMA = DATABASE() AND TABLE_NAME = 'order' AND COLUMN_NAME = 'subscription_user_id');
SET @sql = IF(@col_exists = 0, 'ALTER TABLE `order` ADD COLUMN `subscription_user_id` bigint NOT NULL DEFAULT 0 COMMENT ''Target user ID for subscription (0=same as UserId)'' AFTER `user_id`', 'SELECT 1');
PREPARE stmt FROM @sql;
EXECUTE stmt;
DEALLOCATE PREPARE stmt;

-- Add app_account_token column to order table for Apple IAP (idempotent)
SET @col_exists2 = (SELECT COUNT(*) FROM INFORMATION_SCHEMA.COLUMNS WHERE TABLE_SCHEMA = DATABASE() AND TABLE_NAME = 'order' AND COLUMN_NAME = 'app_account_token');
SET @sql2 = IF(@col_exists2 = 0, 'ALTER TABLE `order` ADD COLUMN `app_account_token` varchar(36) DEFAULT NULL COMMENT ''Apple IAP App Account Token (UUID)'' AFTER `subscribe_token`', 'SELECT 1');
PREPARE stmt2 FROM @sql2;
EXECUTE stmt2;
DEALLOCATE PREPARE stmt2;