const formatTime = date => {
  const year = date.getFullYear()
  const month = date.getMonth() + 1
  const day = date.getDate()
  const hour = date.getHours()
  const minute = date.getMinutes()
  const second = date.getSeconds()

  return `${[year, month, day].map(formatNumber).join('/')} ${[hour, minute, second].map(formatNumber).join(':')}`
}

const formatNumber = n => {
  n = n.toString()
  return n[1] ? n : `0${n}`
}

const urlToObj = function(url) {
  let obj = {}
  let str = url.slice(url.indexOf('?') + 1)
  let arr = str.split('&')
  for(let i = 0 ; i < arr.length ; i ++) {
    let arr_temp = arr[i].split('=')
    obj[arr_temp[0]] = arr_temp[1]
  }
  return obj
}

const removeCss = function(content) {
  let reg=/(style|class)="[^"]+"/gi;
  let img=/<img[^>]+>/gi;
  let res;
  if(img.test(content))
  {
    res = content.match(img);
  for(let i=0;i<res.length;i++){
        console.log(res[i].replace(reg,""));
        content=content.replace(res[i],res[i].replace(reg,""));
      }
  }
  // (/\<img/gi, '<img style="max-width:100%;height:auto;display:block;"')
  return content.replace(/\<img/gi, '<img class="richImg"  ');
}

const getPrePage = function(content) {
  let pages=getCurrentPages()
  return pages[pages.length-1]
}

const objToParam = function(param) {
  if (Object.prototype.toString.call(param) !== '[object Object]') {
    return '';
  }
  let queryParam = '';
  for (let key in param) {
    if (param.hasOwnProperty(key)) {
      let value = param[key];
      queryParam += toQueryPair(key, value);
    }
  }
  return queryParam;
}


let callBackList = [];
let timer_;

/**
 * 开启定时器
*/
const startTimer = function() {
  if(!timer_) {
    timer_ = setInterval(() => {
      if(callBackList.length == 0) {
        console.log('倒计时结束 关闭定时器');
        clearInterval(timer_);
        timer_ = null;
      }
      callBackList.forEach((item,index) => {
        item.currentTime--
        var h = parseInt(item.currentTime / 3600); //小时
        var m = parseInt(item.currentTime / 60 % 60);    //分钟
        var s = parseInt(item.currentTime  % 60);        //当前的秒
        let obj = {
          h,m,s,
          currentTime:item.currentTime
        }
        item.fn(obj);
        if(item.currentTime <= 0) {
          callBackList.splice(index,1);
        }
      });
    }, 1000);
  }
}

const addTime = function(callback,currentTime) {
  if(currentTime) {
    callBackList.push({fn: callback,currentTime});
    console.log('第'+callBackList.length+'个倒计时开启');
    if(!timer_) {
      startTimer()
    }
  }
}

const removeTime = function(fn) {
  for( var i = 0 ; i < callBackList.length ; i ++) {
    let item = callBackList[i];
    if(item.fn == fn) {
      console.log('清除倒计时~');
      callBackList.splice(i,1);
    }
  }
}

function toQueryPair(key, value) {
  if (typeof value == 'undefined') {
    return `${key}=&`;
  }
  return `${key}=${value}&`;
}

module.exports = {
  formatTime,
  urlToObj,
  removeCss,
  getPrePage,
  objToParam,
  addTime,
  removeTime
}