/** 获取错误消息 */
export const getErrorMessage = (error: unknown, fallbackMessage: string) => {
  const fetchError = error as {
    data?: unknown;
    message?: string;
    response?: {
      _data?: unknown;
    };
  };

  const errorData = fetchError.data ?? fetchError.response?._data;

  if (typeof errorData === "string") {
    return errorData;
  }

  if (
    errorData &&
    typeof errorData === "object" &&
    "msg" in errorData &&
    typeof errorData.msg === "string"
  ) {
    return errorData.msg;
  }

  return fetchError.message || fallbackMessage;
};