function getDay (day,haveHours){
  //day为0表示今天的日期   -1为昨天   haveHours存在表示要时分秒 haveHours:true,false
  var today = new Date();
  var targetday_milliseconds=today.getTime() + 1000*60*60*24*day;
  today.setTime(targetday_milliseconds); //注意，这行是关键代码
  var tYear = today.getFullYear();
  var tMonth = today.getMonth();
  var tDate = today.getDate();
  var hours = today.getHours();
  var minutes = today.getMinutes(); //分
  var seconds = today.getSeconds(); //秒
  tMonth = doHandleMonth(tMonth + 1);
  tDate = doHandleMonth(tDate);
  if(haveHours){
    if(day == 0){
      return {
          'now':tYear+"-"+tMonth+"-"+tDate+' ' + hours + ':' + minutes + ':' + seconds,
          'zero':tYear+"-"+tMonth+"-"+tDate+' ' + '00:00:00'
      }
    }else{
        return tYear+"-"+tMonth+"-"+tDate+' ' + hours + ':' + minutes + ':' + seconds
    }
  }else{
      return tYear+"-"+tMonth+"-"+tDate
  }
  
  function doHandleMonth(month){
    var m = month;
    if(month.toString().length == 1){
    m = "0" + month;
    }
    return m;
  }
}
function NumberHandle (value,numberDigit) {//数值小数点处理 ①5997；②8.1w；③2489kw；④4.2亿  且保留一位小数
  if(typeof value === 'number' && !isNaN(value)){
    //判断是否是数值类型
    if((value >= 10000 && value < 10000000) || (value <= -10000 && value > -10000000)){
      return hasDot(value/10000,numberDigit) + 'w'
    }else if((value >= 10000000 && value < 100000000) || (value <= -10000000 && value > -100000000)){
      return hasDot(value/10000000,numberDigit) + 'kw'
    }else if(value >= 100000000 || value <= -100000000){
      return hasDot(value/100000000,numberDigit) + '亿'
    }else{
      return value
    }
  }else{
    return false
  }
}
function hasDot(num,numberDigit){
  //有小数点就保留一个小数，没有就直接返回 ,默认保留1位小数
  var digit = 1;
  if(numberDigit){
    digit = numberDigit
  }
  return (num + '').indexOf('.') != -1 ? num.toFixed(digit) : num;
}
module.exports = {
  getDay: getDay,
  NumberHandle: NumberHandle
}