-- 入口模块地区管理 - 数据迁移脚本
-- 将 areas 字段从字符串数组转换为对象数组，支持启用/禁用状态

-- 1. 添加备份列
ALTER TABLE entry_modules ADD COLUMN IF NOT EXISTS areas_backup JSONB;

-- 2. 备份原数据
UPDATE entry_modules SET areas_backup = areas WHERE areas IS NOT NULL;

-- 3. 转换数据格式
UPDATE entry_modules
SET areas = (
  SELECT jsonb_agg(
    jsonb_build_object(
      'area', area_name,
      'enabled', true,
      'sort_order', row_number
    ) ORDER BY row_number
  )
  FROM (
    SELECT area_name, ROW_NUMBER() OVER () as row_number
    FROM jsonb_array_elements_text(areas) AS area_name
  ) AS numbered_areas
)
WHERE areas IS NOT NULL AND jsonb_typeof(areas) = 'array';

-- 4. 添加注释
COMMENT ON COLUMN entry_modules.areas IS '地区配置: [{"area": "地区名", "enabled": true/false, "sort_order": 排序号}]';

-- 5. 查看迁移结果
SELECT id, name, areas_backup AS old_format, areas AS new_format
FROM entry_modules WHERE areas IS NOT NULL;

-- 回滚（如需要）：
-- UPDATE entry_modules SET areas = areas_backup WHERE areas_backup IS NOT NULL;
-- ALTER TABLE entry_modules DROP COLUMN areas_backup;