export function timeAgo(dateTimeStamp) {
  let result = "";
  let minute = 1000 * 60;      //把分，时，天，周，半个月，一个月用毫秒表示
  let hour = minute * 60;
  let day = hour * 24;
  let week = day * 7;
  let month = day * 30;
  let year = day * 365;
  let now = new Date().getTime();   //获取当前时间毫秒
  let defaultTime =dateTimeStamp 
  dateTimeStamp = dateTimeStamp.substring(0, 18);
  //必须把日期'-'转为'/'
  dateTimeStamp = dateTimeStamp.replace(/-/g, '/');

  let timestamp = new Date(dateTimeStamp).getTime();

  let diffValue = now - timestamp;//时间差

  if (diffValue < 0) {
    return result;
  }
  let minC = diffValue / minute;  //计算时间差的分，时，天，周，月
  let hourC = diffValue / hour;
  let dayC = diffValue / day;
  let weekC = diffValue / week;
  let monthC = diffValue / month;
  let yearC = diffValue / year;

  minC = parseInt(minC)
  hourC = parseInt(hourC)
  dayC = parseInt(dayC)
  weekC = parseInt(weekC)
  monthC = parseInt(monthC)
  yearC = parseInt(yearC)

  if (monthC > 12) {
    // result = " " + parseInt(yearC) + "年前"
	result=defaultTime
  } else if (monthC >= 1 && monthC < 12) {
    result = " " + parseInt(monthC) + "月前"
  } else if (weekC >= 1 && weekC <= 4) {
    result = " " + parseInt(weekC) + "周前"
  } else if (dayC >= 1 && dayC <= 6) {
    result = " " + parseInt(dayC) + "天前"
  } else if (hourC >= 1 && hourC <= 23) {
    result = " " + parseInt(hourC) + "小时前"
  } else if (minC >= 1 && minC <= 59) {
    result = " " + parseInt(minC) + "分钟前"
  } else if (diffValue >= 0 && diffValue <= minute) {
    result = "刚刚"
  }
  return result;
}