/**
 * Created by Administrator on 2017/9/22.
 */
// 引用axios
var axios = require('axios');
var qs = require('qs');

axios.interceptors.request.use((config)=>{
  if(config && config.method == "post" && config.url.indexOf("filemanager")==-1)
{
  if(config.data) {
    config.data = filter_param(config.data);
  }
  config.data = qs.stringify(config.data);
  config.headers["Content-Type"]="application/x-www-form-urlencoded";
}
else if(config && config.method == "get" && config.url.indexOf("filemanager")==-1)
{
  if(config.data) {
    config.data = filter_param(config.data);
  }
}
return config;
})

// 引用superagent
//自定义判断元素类型
function toType(obj)
{
  return ({}).toString.call(obj).match(/\s([a-zA-Z]+)/)[1].toLowerCase();
}

// 参数过滤函数
function filter_param(o)
{
  for(var key in o)
  {
    if(o[key]==null)
      delete o[key];
    if(toType(o[key])=="string")
    {
      o[key] = o[key].trim();
      if(o[key].length==0)
      {
        delete o[key];
      }
    }
  }
  return o;
}

function initData(params)
{
  var formMap = new URLSearchParams();
  for(var key in params){
    formMap.append(key, params[key]);
  }
  return formMap;
}

/*
 接口处理函数
 */
function _api_req(rootUrl,method,url,params,headers,callback1,callback2,errCallback)
{
  if(process.env.NODE_ENV === 'production')
  {
    rootUrl = "/";
  }
  return axios({
      method:method,
      url:url,
      data:method == "POST" || method == "PUT" ? params:null,
      params:method === "GET" || method ==="DELETE" ? params:null,
      baseURL: rootUrl,
      withCredentials: false,
      headers:headers,
      onUploadProgress:function(progressEvent){ //原生获取上传进度的事件
        if(progressEvent.lengthComputable){
          //属性lengthComputable主要表明总共需要完成的工作量和已经完成的工作是否可以被测量
          //如果lengthComputable为false，就获取不到progressEvent.total和progressEvent.loaded
          if(callback1)
          {
            callback1(progressEvent);
          }
        }
      },
    }).then(res =>{
      callback2(res.data);
},error =>{
  errCallback(error);
})
}

export default {
  get:function(root,url,params,headers,callback1,callback2,errCallback){
    root = root!=null ? root:"";
    return _api_req(root,"GET","/"+url,params,headers,callback1,callback2,errCallback);
  },
  put:function(root,url,params,headers,callback1,callback2,errCallback)
  {
    root = root!=null ? root:"";
    return _api_req(root,"PUT","/"+url,params,headers,callback1,callback2,errCallback);
  },
  post:function(root,url,params,headers,callback1,callback2,errCallback)
  {
    root = root!=null ? root:"";
    return _api_req(root,"POST","/"+url,params,headers,callback1,callback2,errCallback);
  },
  delete:function(root,url,params,headers,callback1,callback2,errCallback)
  {
    root = root!=null ? root:"";
    return _api_req(root,"DELETE","/"+url,params,headers,callback1,callback2,errCallback);
  }

}