function formatTime(time) {
	if (typeof time !== 'number' || time < 0) {
		return time
	}

	var hour = parseInt(time / 3600)
	time = time % 3600
	var minute = parseInt(time / 60)
	time = time % 60
	var second = time

	return ([hour, minute, second]).map(function(n) {
		n = n.toString()
		return n[1] ? n : '0' + n
	}).join(':')
}

function formatLocation(longitude, latitude) {
	if (typeof longitude === 'string' && typeof latitude === 'string') {
		longitude = parseFloat(longitude)
		latitude = parseFloat(latitude)
	}

	longitude = longitude.toFixed(2)
	latitude = latitude.toFixed(2)

	return {
		longitude: longitude.toString().split('.'),
		latitude: latitude.toString().split('.')
	}
}
var dateUtils = {
	UNITS: {
		'年': 31557600000,
		'月': 2629800000,
		'天': 86400000,
		'小时': 3600000,
		'分钟': 60000,
		'秒': 1000
	},
	humanize: function(milliseconds) {
		var humanize = '';
		for (var key in this.UNITS) {
			if (milliseconds >= this.UNITS[key]) {
				humanize = Math.floor(milliseconds / this.UNITS[key]) + key + '前';
				break;
			}
		}
		return humanize || '刚刚';
	},
	format: function(dateStr) {
		var date = this.parse(dateStr)
		var diff = Date.now() - date.getTime();
		if (diff < this.UNITS['天']) {
			return this.humanize(diff);
		}
		var _format = function(number) {
			return (number < 10 ? ('0' + number) : number);
		};
		return date.getFullYear() + '/' + _format(date.getMonth() + 1) + '/' + _format(date.getDate()) + '-' +
			_format(date.getHours()) + ':' + _format(date.getMinutes());
	},
	parse: function(str) { //将"yyyy-mm-dd HH:MM:ss"格式的字符串，转化为一个Date对象
		var a = str.split(/[^0-9]/);
		return new Date(a[0], a[1] - 1, a[2], a[3], a[4], a[5]);
	}
};

//获取日期的今天，明天，后天 -1是昨天，0是今天，1是后一天
function getDateStr(today, addDayCount) {
	let date;
	if (today) {
		date = new Date(today);
	} else {
		date = new Date();
	}
	date.setDate(date.getDate() + addDayCount); //获取AddDayCount天后的日期 
	let y = date.getFullYear();
	let m = date.getMonth() + 1; //获取当前月份的日期 
	let d = date.getDate();
	if (m < 10) {
		m = '0' + m;
	};
	if (d < 10) {
		d = '0' + d;
	};
	console.log(y + "-" + m + "-" + d)
	return y + "-" + m + "-" + d;
}
//非空校验
const checkNotEmpty = (str) => {
	return typeof(str) !== 'undefined' && str !== null && str !== '' ? true : false
}
// 获取日期
function getDay(d, num) {
  const date = new Date(new Date(d).setDate(new Date(d).getDate() + num))
  const year = date.getFullYear()
  const month = (date.getMonth() + 1 + "").padStart(2, "0")
  const day = (date.getDate() + "").padStart(2, "0")
  return `${year}-${month}-${day}`
}

// 是否是闰年
function isLeap(year){
return (year % 4 == 0 && year % 100 != 0) || year % 400 == 0
}

// 返回去年日期
function lastYearDate(d) {
  const date = new Date(d)
  const year = date.getFullYear()
  const month = date.getMonth() + 1
  const day = date.getDate()
  const lastYear = year - 1
  const thisYearisLeap = isLeap(year)
  const lastYearIsLeap = isLeap(lastYear)
  // 特殊情况：去年是否是闰年 或 今年是闰年且为12月31日
  if (lastYearIsLeap || (thisYearisLeap && month == 12 && day == 31)) return getDay(d, -366)
  return getDay(d, -365)
}

export {
	formatTime,
	formatLocation,
	getDateStr,
	dateUtils,
	checkNotEmpty,
	lastYearDate
}