const formatTime = 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()

	return [year, month, day].map(formatNumber).join('/') + ' ' + [hour, minute, second].map(formatNumber).join(':')
}
const formatNumber = n => {
	n = n.toString()
	return n[1] ? n : '0' + n
}

const formatDate = 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()

	return [year, month, day].map(formatNumber).join('/')
}

//计算相差天数
const datedifference = (sDate1, sDate2) => { //sDate1和sDate2是2006-12-18格式 
	var dateSpan,
		tempDate,
		iDays;
	sDate1 = Date.parse(sDate1.replace(/-/g, '/'));
	sDate2 = Date.parse(sDate2.replace(/-/g, '/'));
	dateSpan = sDate2 - sDate1;
	dateSpan = Math.abs(dateSpan);
	iDays = Math.floor(dateSpan / (24 * 3600 * 1000));
	return iDays
};

const getDays = (date1, date2) => {
	const dateTime = 1000 * 60 * 60 * 24; //每一天的毫秒数
	const minusDays = Math.floor(((date2.getTime() - date1.getTime()) / dateTime));//计算出两个日期的天数差
	return Math.abs(minusDays);
}

/**
 * [dateAddDays 从某个日期增加n天后的日期]
 * @param  {[string]} dateStr  [日期字符串]
 * @param  {[int]} dayCount [增加的天数]
 * @return {[string]}[增加n天后的日期字符串]
 */
const dateAddDays = (dateStr, dayCount) => {
	var tempDate = new Date(dateStr.replace(/-/g, "/"));//把日期字符串转换成日期格式
	var resultDate = new Date((tempDate / 1000 + (86400 * dayCount)) * 1000);//增加n天后的日期
	var resultDateStr = resultDate.getFullYear() + "-" + (resultDate.getMonth() + 1) + "-" + (resultDate.getDate());//将日期转化为字符串格式
	return resultDateStr;
}


/**
 * 根据newDate 来获取加的日期
 */
const addDaysFromNewDate = (tempDate, dayCount) => {
	var resultDate = new Date((tempDate / 1000 + (86400 * dayCount)) * 1000);//增加n天后的日期
	//    var resultDateStr=resultDate.getFullYear()+"/"+(resultDate.getMonth()+1)+"/"+(resultDate.getDate());//将日期转化为字符串格式
	// return resultDateStr;

	const year = resultDate.getFullYear();
	const month = resultDate.getMonth() + 1;
	const day = resultDate.getDate();

	return [year, month, day].map(formatNumber).join('/')

}

const getWeightDate = date => {
	var timearr = date.replace(" ", ":").replace(/\:/g, "-").split("-");
	var timestr = "" + timearr[1] + "/" + timearr[2]
	return timestr
}




const dateAddDate = (dateStr, dayCount) => {
	var tempDate = new Date(dateStr.replace(/-/g, "/"));//把日期字符串转换成日期格式
	var resultDate = new Date((tempDate / 1000 + (86400 * dayCount)) * 1000);//增加n天后的日期

	const year = resultDate.getFullYear()
	const month = resultDate.getMonth() + 1
	const day = resultDate.getDate()

	const hour = resultDate.getHours()
	const minute = resultDate.getMinutes()
	const second = resultDate.getSeconds()
	//将日期转化为字符串格式
	return [year, month, day].map(formatNumber).join('/') + ' ' + [hour, minute, second].map(formatNumber).join(':');
}


const addDayTranMillisecond = (dateStr, dayCount) => {
	var tempDate = new Date(dateStr.replace(/-/g, "/"));//把日期字符串转换成日期格式
	var resultDate = new Date((tempDate / 1000 + (86400 * dayCount)) * 1000);//增加n天后的日期
	//将日期转化为字符串格式
	return resultDate.getTime();
}

//计算剩余时间
const remainDayAndHour = (sDate1, currentDate) => { //sDate1和sDate2是2006-12-18格式 
	var dateSpan,
		tempDate,
		iDays;
	sDate1 = Date.parse(sDate1.replace(/-/g, '/'));
	currentDate = Date.parse(currentDate.replace(/-/g, '/'));
	dateSpan = currentDate - sDate1;
	// console.log(dateSpan);

	if (dateSpan < 0) {
		dateSpan = Math.abs(dateSpan);
		iDays = Math.floor(dateSpan / (24 * 3600 * 1000));
		//  计算小时数
		var hours = Math.floor(dateSpan / (60 * 60 * 1000));
		// console.log(iDays,hours);
		return [iDays, hours];
	} else {
		return [0, 0];
	}
};

export default {
	formatTime,
	formatDate,
	datedifference,
	getDays,
	dateAddDays,
	addDaysFromNewDate,
	getWeightDate,

	dateAddDate,
	remainDayAndHour,

	addDayTranMillisecond
}