var numToArray = function (num) {
  var arr = [];
  for (var i = 0; i < num; i++) {
    arr[i] = i;
  }
  return arr;
}

var formatNumber = function (n) {
  n = n.toString()
  return n[1] ? n : '0' + n
}

/**
 * 时间戳格式化时间
 */
var formatTime = function (datetime) {
  if (!datetime) return '';
  var date = getDate(datetime * 1000);
  var year = date.getFullYear()
  var month = date.getMonth() + 1
  var day = date.getDate()
  var hour = date.getHours()
  var minute = date.getMinutes()
  var second = date.getSeconds()

  return year + '-' + formatNumber(month) + '-' + formatNumber(day) + ' ' + formatNumber(hour) + ':' + formatNumber(minute) + ':' + formatNumber(second);
}
/**
 * 时间戳格式化时间 不带秒
 */
var formatTimeNoSecond = function (datetime) {
  if (!datetime) return '';
  var date = getDate(datetime * 1000);
  var year = date.getFullYear()
  var month = date.getMonth() + 1
  var day = date.getDate()
  var hour = date.getHours()
  var minute = date.getMinutes()
  var second = date.getSeconds()

  return year + '-' + formatNumber(month) + '-' + formatNumber(day) + ' ' + formatNumber(hour) + ':' + formatNumber(minute);
}

// 时间戳格式化 返回日期
var formatGetDate = function (datetime) {
  var date = getDate(datetime * 1000);
  var year = date.getFullYear()
  var month = date.getMonth() + 1
  var day = date.getDate()

  return year + '-' + formatNumber(month) + '-' + formatNumber(day);
}

/**
 * 隐藏字符串 多余字符使用*替代
 */
var maskStr = function (str, replace, len) {
  if (typeof str != 'string')
    return '';
  if(str.length < len) return str;
  return str.substring(0, len) + replace + replace + replace;
}

/**
 * 将字符串分割成数组
 */
var splitx = function (str, splitstr) {
  if (typeof str != 'string')
    return [];
  return str.split(splitstr);
}

var toFixed = function(num, n) {
  return Math.floor(num * Math.pow(10, n)) / Math.pow(10, n)
}

var showMoney = function(m) {
  var _n = m / 1000
  if(_n <=1 ) {
    return m
  }
  if (_n > 1 && _n < 10) {
    return _n.toFixed(1) + '千'
  }
  _n = m / 10000
  return _n.toFixed(1) + '万'
}

function formatSeconds(value) {
  var theTime = parseInt(value);// 需要转换的时间秒 
  var theTime1 = 0;// 分 
  var theTime2 = 0;// 小时 
  var theTime3 = 0;// 天
  if (theTime === 0) return [parseInt(theTime), "sec", 'S'];
  if (theTime > 60) {
    theTime1 = parseInt(theTime / 60);
    theTime = parseInt(theTime % 60);
    if (theTime1 > 60) {
      theTime2 = parseInt(theTime1 / 60);
      theTime1 = parseInt(theTime1 % 60);
      if (theTime2 > 24) {
        //大于24小时
        theTime3 = parseInt(theTime2 / 24);
        theTime2 = parseInt(theTime2 % 24);
      }
    }
  }
  var result = ['', ''];
  if (theTime > 0) {
    result = [parseInt(theTime) , "sec", 'S'];
  }
  if (theTime1 > 0) {
    result = [parseInt(theTime1), "min", 'M'].concat(result);
  }
  if (theTime2 > 0) {
    result = [parseInt(theTime2), "hour", 'H'].concat(result);
  }
  if (theTime3 > 0) {
    result = [parseInt(theTime3), "day", 'D'].concat(result);
  }
  return result;
}

var formatHourSeconds = function (time) {
  var sec = parseInt(time % 60);
  var min = parseInt(parseInt(time / 60) % 60);
  var hour = parseInt(parseInt(time / 60) / 60);

  return formatNumber(hour) + ':' + formatNumber(min) + ':' + formatNumber(sec);
}

var filterHalf = function (l) {
  return l.filter(function (p, i) { return i % 2 == 1});
}

var max = function (arr) {
  // return [...arr].sort(function (a, b) { return b - a })[0];
  
  //return arr.sort(function (a, b) { return b - a })[0];
  
	return arr.reduce(function(max, current) {
		return current > max ? current : max;
	}, -Infinity);
}

var min = function (arr) {
  // return [...arr].sort(function (a, b) { return a - b })[0];
 // return arr.sort(function (a, b) { return a - b })[0];
	return arr.reduce(function(min, current) {
		return current < min ? current : min;
	}, Infinity);
}


var getOption = function (option, value) {
  return option.filter(function (p, i) { return p.value == value })[0]
}

var getOptionIndex = function (option, value) {
  var i
  for (i = 0; i < option.length; i++) {
    if (option[i].value == value) {
      return i
    }
  }
}

module.exports = {
  numToArray: numToArray,
  formatTime: formatTime,
  formatGetDate: formatGetDate,
  maskStr: maskStr,
  splitx: splitx,
  toFixed: toFixed,
  showMoney: showMoney,
  formatSeconds: formatSeconds,
  formatHourSeconds: formatHourSeconds,
  filterHalf: filterHalf,
  max: max,
  min: min,
  getOption: getOption,
  getOptionIndex: getOptionIndex,
  formatTimeNoSecond:formatTimeNoSecond
}