// 功能：独立创建用户设备分组表及产品归组字段，不迁移其他业务表；版本：1.0.0。
package main

// migrateDeviceGroups 创建分组资料并补充产品归组字段，重复执行不清空现有数据。
func migrateDeviceGroups() error {
	return migrateClientColumns([]string{
		`CREATE TABLE IF NOT EXISTS user_device_group (
   id bigserial PRIMARY KEY,
   identity varchar(36) NOT NULL UNIQUE,
   created_at timestamptz NOT NULL,
   updated_at timestamptz NOT NULL,
   deleted_at timestamptz,
   status integer NOT NULL DEFAULT 1 CHECK (status IN (1,3)),
   user_account_id bigint NOT NULL REFERENCES user_account(id),
   name varchar(32) NOT NULL,
   request_no varchar(36) NOT NULL,
   sort_no integer NOT NULL DEFAULT 0,
   UNIQUE(user_account_id, request_no)
  )`,
		`COMMENT ON TABLE user_device_group IS '用户本人设备展示分组；不授予设备控制、共享或物联网权限'`,
		`COMMENT ON COLUMN user_device_group.id IS '数据库自增内部主键'`,
		`COMMENT ON COLUMN user_device_group.identity IS '对外业务UUID标识'`,
		`COMMENT ON COLUMN user_device_group.created_at IS '分组创建时间'`,
		`COMMENT ON COLUMN user_device_group.updated_at IS '分组最后修改时间'`,
		`COMMENT ON COLUMN user_device_group.deleted_at IS '软删除时间；当前删除操作使用状态归档'`,
		`COMMENT ON COLUMN user_device_group.status IS '状态：1=启用，3=已归档'`,
		`COMMENT ON COLUMN user_device_group.user_account_id IS '分组所属用户内部主键，仅本人可读写'`,
		`COMMENT ON COLUMN user_device_group.name IS '用户自定义分组名称，最多32字'`,
		`COMMENT ON COLUMN user_device_group.request_no IS '客户端新增请求UUID，同一用户内唯一且归档后不复用'`,
		`COMMENT ON COLUMN user_device_group.sort_no IS '同一用户内显示顺序，数值越小越靠前'`,
		`CREATE UNIQUE INDEX IF NOT EXISTS idx_device_group_active_name ON user_device_group(user_account_id,name) WHERE status=1 AND deleted_at IS NULL`,
		`CREATE INDEX IF NOT EXISTS idx_device_group_user_sort ON user_device_group(user_account_id,status,sort_no,id)`,
		`ALTER TABLE product_info ADD COLUMN IF NOT EXISTS device_group_id bigint NOT NULL DEFAULT 0`,
		`COMMENT ON COLUMN product_info.device_group_id IS '当前用户设备分组内部主键；0表示未分组，产品归属变化时必须清空'`,
		`CREATE INDEX IF NOT EXISTS idx_product_device_group ON product_info(user_account_id,device_group_id) WHERE device_group_id <> 0`,
	})
}