//success成功之前拦截器 在这里 自定义异常拦截
$.ajaxSetup({
    beforeSend: function(xhr, options) {
        var originalSuccess = options.success
        options.success = function(data, textStatus, jqXhr) {
			data = modifyResponseData(data);
			success(data,textStatus, jqXhr);
            originalSuccess.apply(this, arguments)
        }
    }
})
// 请求发送之前的拦截器
$(document).ajaxSend(function (event, xhr, settings) {
	//修改请求参数
  	xhr.setRequestHeader('Authorization', localStorage.getItem("tokens"));

  var modifiedRequestData = modifyRequestData(settings);
  settings.data = modifiedRequestData;
});
// 响应成功后的拦截器
$(document).ajaxSuccess(function (event, xhr, settings, data) {
	 data = modifyResponseData(data);
	let  modifiedResponseData=data;
  settings.data = modifiedResponseData;
  return data;
});

// 请求失败后的拦截器
$(document).ajaxError(function (event, xhr, settings, error) {
		error(event, xhr, settings, error);
});

// 修改请求数据的函数
function modifyRequestData(settings) {
	  var requestData = settings.data;
	  var modifiedData = requestData;
	if(settings.headers){
		if(settings.headers['decrypt']=='decrypt'){
			return modifiedData;
		}
	}
	if(settings.type=='POST'){
		if(settings.contentType.indexOf('multipart/form-data')!=-1){
			return modifiedData;
		}else if(settings.contentType.indexOf('application/x-www-form-urlencoded')!=-1){
			var requestData = settings.data;
			var modifiedData = requestData;
			modifiedData=decodeURIComponent(modifiedData);
			if(!modifiedData){
				modifiedData="123";
			}else{
				modifiedData=modifiedData.replaceAll("+-+"," - ");
				modifiedData=modifiedData.replaceAll("+~+"," ~ ");
			}
			modifiedData=sm2Encrypt(modifiedData);
			return "formData="+modifiedData;
		}
	}
		//默认加密
	 let url=getUrlParam(settings.url);
	 settings.url=url;
	 if(modifiedData){
		 modifiedData=modifiedData.replaceAll("+"," ");
	 }
     modifiedData=decodeURIComponent(modifiedData);
     modifiedData= sm2Encrypt(modifiedData);
  return modifiedData;
}
// 修改响应数据的函数
function modifyResponseData(responseData) {
  // 在这里对响应数据进行修改
  if(responseData.decrypt){
		responseData = sm2Decrypt(responseData.data);
  }else{
	  if(typeof(responseData.data)=='undefined'){
		  return responseData;
	  }
  	responseData=responseData.data;
  }
  if(typeof(responseData)=='object'){
	  return responseData;
  }
  if(typeof(responseData)=='string'){
	  var responseData = JSON.parse(responseData);
	  var modifiedData = responseData;
	  return modifiedData;
  }
  return responseData;
}

// url后面路径解析加密
function  getUrlParam (url) {
   var arrObj = url.split("?");
   if (arrObj.length > 1) {
	   if(arrObj[1]){
	   		 arrObj[1]=arrObj[1].replaceAll("+"," ");
	   }
	   
		return   arrObj[0]+"?"+  sm2Encrypt(arrObj[1]);
      } else {
        return url;
   }
}
function removePadding2(decrypted) {
    const lastByte = decrypted.charCodeAt(decrypted.length - 1);
    if (lastByte <= 16) {
        for (let i = decrypted.length - lastByte; i < decrypted.length; i++) {
            if (decrypted.charCodeAt(i) !== lastByte) {
                return decrypted; // 如果填充不正确，返回原始字符串
            }
        }
        return decrypted.slice(0, -lastByte);
    }
    return decrypted;
}