// 时间日期格式化
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
}

// 几天前时间转换
function getDateDiff(dateTimeStamp) {
	var result;
	var minute = 1000 * 60;
	var hour = minute * 60;
	var day = hour * 24;
	var halfamonth = day * 15;
	var month = day * 30;
	var now = new Date().getTime();
	var diffValue = now - dateTimeStamp;
	if (diffValue < 0) {
		return;
	}
	// 数值补0方法
	var zero = function(value) {
		if (value < 10) {
			return '0' + value;
		}
		return value;
	};
	var date = new Date(dateTimeStamp);
	// 今年时间
	var CurrentDateTime = zero(date.getMonth() + 1) + '月' + zero(date.getDate()) + '日';
	// 过了一年时间显示
	var dateTimeed = date.getFullYear() + '年' + zero(date.getMonth() + 1) + '月' + zero(date.getDate()) + '日';
	// console.log('---------------')
	// console.log(minute)
	// console.log(hour)
	// console.log(day)
	// console.log(halfamonth)
	// console.log(month)
	// console.log(now)
	// console.log(diffValue)
	// console.log('-----------------')
	var monthC = diffValue / month;
	var weekC = diffValue / (7 * day);
	var dayC = diffValue / day;
	var hourC = diffValue / hour;
	var minC = diffValue / minute;
	// console.log('。。。。。。。。')
	// console.log(monthC)
	// console.log(weekC)
	// console.log(dayC)
	// console.log(hourC)
	// console.log(minC)
	// console.log('。。。。。。。。。')
	if(monthC > 12){
		result = dateTimeed;
	} else if (weekC >= 1) {
		result = "" + parseInt(weekC) + "周前";
	} else if (dayC >= 1 && dayC < 2) {
		result = '昨天';
	}else if (dayC >= 2 && dayC < 3) {
		result = '前天';
	} else if (dayC > 3) {
		result = CurrentDateTime;
	}  else if (hourC >= 1) {
		result = "" + parseInt(hourC) + "小时前";
	} else if (minC >= 1) {
		result = "" + parseInt(minC) + "分钟前";
	} else {
		result = "刚刚";
	}

	return result;
};
function formatDate(dateTime, formatStr) {
  var converted = Date.parse(dateTime)
  var thisDateTime = new Date(converted)
  if (thisDateTime) {
    let str = formatStr
    const Week = ['日', '一', '二', '三', '四', '五', '六']

    str = str.replace(/yyyy|YYYY/, thisDateTime.getFullYear())
    str = str.replace(/yy|YY/, (thisDateTime.getYear() % 100) > 9 ? (thisDateTime.getYear() % 100).toString() : '0' + (thisDateTime.getYear() % 100))

    str = str.replace(/MM/, (thisDateTime.getMonth() + 1) > 9 ? (thisDateTime.getMonth() + 1).toString() : '0' + (thisDateTime.getMonth() + 1))
    str = str.replace(/M/g, thisDateTime.getMonth())

    str = str.replace(/w|W/g, Week[thisDateTime.getDay()])

    str = str.replace(/dd|DD/, thisDateTime.getDate() > 9 ? thisDateTime.getDate().toString() : '0' + thisDateTime.getDate())
    str = str.replace(/d|D/g, thisDateTime.getDate())

    str = str.replace(/hh|HH/, thisDateTime.getHours() > 9 ? thisDateTime.getHours().toString() : '0' + thisDateTime.getHours())
    str = str.replace(/h|H/g, thisDateTime.getHours())
    str = str.replace(/mm/, thisDateTime.getMinutes() > 9 ? thisDateTime.getMinutes().toString() : '0' + thisDateTime.getMinutes())
    str = str.replace(/m/g, thisDateTime.getMinutes())

    str = str.replace(/ss|SS/, thisDateTime.getSeconds() > 9 ? thisDateTime.getSeconds().toString() : '0' + thisDateTime.getSeconds())
    str = str.replace(/s|S/g, thisDateTime.getSeconds())

    return str
  } else { return formatStr }
}
module.exports = {
	formatTime,
	getDateDiff,
	formatDate
}