//获取系统的时间
var days = []
const formatNumber = n => {
  n = n.toString()
  return n[1] ? n : '0' + n
}
//当前时间-数组模式 年月日 时分秒
const nowDateTime = 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()
  const nowTime = [year, month, day].map(formatNumber).join('-') + ' ' + [hour, minute, second].map(formatNumber).join(':')//整合时间
  const time = {
    'year': year, 'month': month, 'day': day, 'hour': hour, 'minute': minute, 'second': second, 'nowTime': nowTime
  }
  return time
}
//当前时间-数组模式 年月日
const nowDate = date => {
  const year = date.getFullYear()
  const month = date.getMonth() + 1
  const day = date.getDate()
  return [year, month, day].map(formatNumber).join('-')

}
// 从 todate 开始计算 days 天的日期数组
function dateArry(todate,days) {
  var dateArry = [];
  for (var i = 0; i < days; i++) {
    var dateObj = dateLater(todate, i);
    dateArry.push(dateObj)
  }
  return dateArry;
}
function dateLater(dates, later) {
  let dateObj = {};
  let day_week = new Array('周日', '周一', '周二', '周三', '周四', '周五', '周六');
  let day_index = new Array(7, 1, 2, 3, 4, 5, 6);
  let date = new Date(dates);
  date.setDate(date.getDate() + later);
  let day = date.getDay();
  let yearDate = date.getFullYear();
  let month = ((date.getMonth() + 1) < 10 ? ("0" + (date.getMonth() + 1)) : date.getMonth() + 1);
  let dayFormate = (date.getDate() < 10 ? ("0" + date.getDate()) : date.getDate());
  days = days.concat(dayFormate)
  dateObj.date = yearDate + '-' + month + '-' + dayFormate;
  dateObj.week = day_week[day];
  dateObj.num = day_index[day];
  dateObj.day = days[day];
  
  return dateObj;
}
//往后/前推几天的日期
function delayDate(today, addDayCount) {
  var dd;
  if (today) {
    dd = new Date(today);
  } else {
    dd = new Date();
  }
  dd.setDate(dd.getDate() + addDayCount);//获取addDayCount天后的日期 
  var y = dd.getFullYear();
  var m = dd.getMonth() + 1;//获取当前月份的日期 
  var d = dd.getDate();
  if (m < 10) {
    m = '0' + m;
  };
  if (d < 10) {
    d = '0' + d;
  };
  var newDay = y + '-' + m + '-' + d
  return newDay;
}
//当前周的数组
function nowWeek(day) {
  var nowWeekArry = {}
    , nowDate = day //当前日期
    , num = dateArry(nowDate,1)[0].num //当前周几
    , monday = delayDate(nowDate, -(num - 1)) //本周一的 日期
    , sunday = delayDate(nowDate, 7 - num) //本周日的 日期
    , nowWeek = dateArry(monday,7) //本周列表
  console.log(num)
  nowWeekArry = {
    'nowDate': nowDate //当前日期
    , 'num': num //当前周几
    , 'nowWeek': nowWeek //本周列表
  }
  return nowWeekArry
}

//一周的几号重组
function weekData(weekData) {
  var weekData = weekData
  for (let i = 0; i < weekData.length; i++) {
    var day = weekData[i].date
    weekData[i].day = day.substr(8, 2)
  }
  return weekData;
}
//日期转整型
function date(date) {
  var a = parseInt(date.substr(0, 4) + date.substr(5, 2) + date.substr(8, 2))
  return a;
}
function toFix(value) {
  return value.toFixed(2) // 此处2为保留两位小数，保留几位小数，这里写几    
}
module.exports = {
  nowDateTime: nowDateTime //年月日 时分秒
  , nowDate: nowDate //年月日
  , dateArry: dateArry // 从 todate 开始计算 days 天的日期数组
  , delayDate: delayDate //往后/前推几天的日期
  , date: date  //日期转整型
  , weekData: weekData //一周的几号重组
  , nowWeek: nowWeek
  , toFix: toFix
  //,box: box
}