-- 企业微信获客助手：公开 JS 浮窗配置。
-- 新安装环境已包含在 add_first_visit_wecom_promotion.sql，无需重复执行本文件。

SET @widget_column_exists = (
  SELECT COUNT(*)
  FROM `information_schema`.`COLUMNS`
  WHERE `TABLE_SCHEMA` = DATABASE()
    AND `TABLE_NAME` = 'zyt_qywx_promotion_pool'
    AND `COLUMN_NAME` = 'widget_config_json'
);

SET @widget_upgrade_sql = IF(
  @widget_column_exists = 0,
  'ALTER TABLE `zyt_qywx_promotion_pool` ADD COLUMN `widget_config_json` text NULL COMMENT ''公开浮窗配置 JSON v1'' AFTER `fallback_url`',
  'SELECT ''widget_config_json already exists'' AS `migration_status`'
);

PREPARE widget_upgrade_statement FROM @widget_upgrade_sql;
EXECUTE widget_upgrade_statement;
DEALLOCATE PREPARE widget_upgrade_statement;