const qs = require('qs');
const $ = require("jquery");
var Promise = require('./rePromise');
//重写assign方法
if (typeof Object.assign != 'function') {
  Object.assign = function(target) {
    'use strict';
    if (target == null) {
      throw new TypeError('Cannot convert undefined or null to object');
    }
 
    target = Object(target);
    for (var index = 1; index < arguments.length; index++) {
      var source = arguments[index];
      if (source != null) {
        for (var key in source) {
          if (Object.prototype.hasOwnProperty.call(source, key)) {
            target[key] = source[key];
          }
        }
      }
    }
    return target;
  };
}
const config = {
  pushInner:'/api/data/push/push',
  calculate:'/api/data/calc/calculate',
  disclaimer: '/api/data/disclaimerInformation/getDisclaimerInformations',
  information: '/api/data/conceptDetail/getConceptDetail',
  pushScale: '/api/data/push/pushScale',
  pushTreatment: '/api/data/push/pushTreatment',
  getSysSetInfoDatas: '/api/data/sysSet/getSysSetInfoDatas',
  getMr: '/api/data/mr/getMr'
}
const imageUrlPrefix = 'http://192.168.2.241:82';
const getUrlArgObject = function(parm) {  
  var query = window.location.search;
  var args = qs.parse(query.substr(1));
  return args[parm];//返回对象  
} 
const post = function(url,data){
  return new Promise((resolve,reject)=>{
    $.ajax({
      method:'post',
      url:url,
      data:JSON.stringify(data),
      contentType:"application/json; charset=UTF-8",
      beforeSend :function(xmlHttp){
        xmlHttp.setRequestHeader("If-Modified-Since","0");
        xmlHttp.setRequestHeader("Cache-Control","no-cache");
      },
      success:function(res){
        resolve({data:res});
      },
      error:function(error){
        reject(error);
      },
    });
  });
}
const newinConf = {
  width: '600',   //窗口的文档显示区的宽度。以像素计。
  height: '600',  //窗口文档显示区的高度。以像素计。
  left: '0',  //窗口的 x 坐标。以像素计。
  top: '0',    //窗口的 y 坐标。以像素计。
  openMode: "_blank"  //每次都是新窗口打开为_blank,打开同一窗口填写任意字符串
}

const newWindowLocation = `width=${newinConf.width}, height=${newinConf.height}, left=${newinConf.left}, top=${newinConf.top} scrollbars=yes`
const openNewWin = function(url) {
  window.open(url, newinConf.openMode, newWindowLocation)
}

//判断浏览器是否为Ie8
const isIe8 = function(){
  var DEFAULT_VERSION = 8.0;
  var ua = navigator.userAgent.toLowerCase();
  var isIE = ua.indexOf("msie")>-1;
  var safariVersion;
  if(isIE){
  safariVersion =  ua.match(/msie ([\d.]+)/)[1];
  } 
  if(safariVersion <= DEFAULT_VERSION ) {
    return true
  } 
}

const throttle =  function(fn, threshhold) {
  var timeout
  var start = new Date;
  var threshhold = threshhold || 160
  return function () {
 
  var context = this, args = arguments, curr = new Date() - 0
  
  clearTimeout(timeout)//总是干掉事件回调
  if(curr - start >= threshhold){ 
      // console.log("now", curr, curr - start)//注意这里相减的结果，都差不多是160左右
      fn.apply(context, args) //只执行一部分方法，这些方法是在某个时间段内执行一次
      start = curr
  }else{
  //让方法在脱离事件后也能执行一次
      timeout = setTimeout(function(){
         fn.apply(context, args) 
      }, threshhold);
     }
   }
 }

module.exports = {
  config,
  post,
  getUrlArgObject,
  imageUrlPrefix,
  throttle,
  openNewWin,
  isIe8
}