/**
 * Created by Administrator on 2017/9/22.
 */
// 引用axios
var axios = require('axios');
var qs = require('qs');
// 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,success,fail)
{
  if(params) {
    params = filter_param(params);
  }
  axios({
    method:method,
    url:url,
    data:method == "POST" || method == "PUT" ? initData(params):null,
    params:method === "GET" || method ==="DELETE" ? params:null,
    baseURL: rootUrl,
    withCredentials: false,
    header:{"Content-type":"application/x-www-form-urlencoded"}
  })
  .then(function(res){
      if (res.data) {
        if (success) {
          success(res.data)
        }
      } else {
        if (fail) {
          fail (res.data)
        } else {
          window.alert('error: ' + JSON.stringify(res.data))
        }
      }
    })
    .catch(function (err) {
      let res = err.response
      if (err) {
        window.alert('api error, HTTP CODE: ' + res.status)
        return
      }
    })
}

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

}