//获取本日
function getDate(dates) {
	var dd = new Date();
	var n = dates || 0;
	dd.setDate(dd.getDate() + n);
	var y = dd.getFullYear();
	var m = dd.getMonth() + 1;
	var d = dd.getDate();
	m = m < 10 ? "0" + m : m;
	d = d < 10 ? "0" + d : d;
	var day = y + "-" + m + "-" + d;
	return day;
}
// 获取本周日期
function getMonday(type, dates) {
	var now = new Date();
	var nowTime = now.getTime();

	var day = now.getDay();

	var longTime = 24 * 60 * 60 * 1000;

	var n = longTime * 7 * (dates || 0);

	if (type == "s") {
		var dd = nowTime - (day - 1) * longTime + n;
	};
	if (type == "e") {
		var dd = nowTime + (7 - day) * longTime + n;
	};
	dd = new Date(dd);
	var y = dd.getFullYear();
	var m = dd.getMonth() + 1;
	var d = dd.getDate();
	m = m < 10 ? "0" + m : m;
	d = d < 10 ? "0" + d : d;
	var day = y + "-" + m + "-" + d;
	return day;
}
// 获取本月日期
function getMonth(type, months) {
	var d = new Date();
	var year = d.getFullYear();
	var month = d.getMonth() + 1;

	if (Math.abs(months) > 12) {
		months = months % 12;
	};
	// console.log(months)
	if (months != 0) {
		if (month + months > 12) {
			year++;
			month = (month + months) % 12;
		} else if (month + months < 1) {
			year--;
			month = 12 + month + months;
		} else {
			month = month + months;
		};
	};

	month = month < 10 ? "0" + month : month;

	var date = d.getDate();
	var firstday = year + "-" + month + "-" + "01";
	var lastday = "";
	if (month == "01" || month == "03" || month == "05" || month == "07" || month == "08" || month == "10" ||
		month == "12") {
		lastday = year + "-" + month + "-" + 31;
	} else if (month == "02") {
		if ((year % 4 == 0 && year % 100 != 0) || (year % 100 == 0 && year % 400 == 0)) {
			lastday = year + "-" + month + "-" + 29;
		} else {
			lastday = year + "-" + month + "-" + 28;
		};
	} else {
		lastday = year + "-" + month + "-" + 30;
	};
	var day = "";
	if (type == "s") {
		day = firstday;
	} else {
		day = lastday;
	};
	return day;
}
// 获取本年日期
function getYear(type, dates) {
	var dd = new Date();
	var n = dates || 0;
	var year = dd.getFullYear() + Number(n);
	if (type == "s") {
		var day = year + "-01-01";
	};
	if (type == "e") {
		var day = year + "-12-31";
	};
	if (!type) {
		var day = year + "-01-01/" + year + "-12-31";
	};
	return day;
}


function num(str, num) {
	var res = parseFloat(Number(str))
	var x = String(str).indexOf(".") + 1; //判断是不是小数
	if (x > 0) {
		var len = str.toString().split(".")[1].length
		res = parseFloat(res.toFixed(num))
	}
	return res;
}

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('.')
	}
}
// 组装请求参数 接收接口的参数名
function reparam(e){
	var eid  = uni.getStorageSync('userinfo').eid
	var param = {
		class:"business_requ",
		eid:eid,
		data:{
			verno:"1.0",
			eid:eid,
			...e
		}
	}
	return param
}

// 经纬度转换成三角函数中度分表形式。
function rad(d) {
	return d * Math.PI / 180.0; 
}
// 根据经纬度计算距离，参数分别为第一点的纬度，经度；第二点的纬度，经度
function getDistance(lat1, lng1, lat2, lng2) {

	var radLat1 = rad(lat1);
	var radLat2 = rad(lat2);
	var a = radLat1 - radLat2;
	var b = rad(lng1) - rad(lng2);
	var s = 2 * Math.asin(Math.sqrt(Math.pow(Math.sin(a / 2), 2) +
		 Math.cos(radLat1) * Math.cos(radLat2) * Math.pow(Math.sin(b / 2), 2)));
	s = s * 6378.137; // EARTH_RADIUS;
	s = Math.round(s * 10000) / 10000; //输出为公里

	var distance = s;
	var distance_str = "";
	
	if (parseInt(distance) >= 1) {
		 distance_str = distance.toFixed(1) + "公里";
	} else {
		 distance_str = distance * 1000 + "米";
	}
	// s=s.toFixed(4);
	var mi = s * 1000
	var res = {}
	res.m = distance_str
	res.k = mi.toFixed();
	// console.info('lyj 距离是', s);//千米
	// console.info('lyj 距离是', distance_str);
	
	return res;
}


module.exports = {
	getDate: getDate,
	getMonday: getMonday,
	getMonth: getMonth,
	getYear: getYear,
	num: num,
	formatLocation: formatLocation,
	reparam: reparam,
	getDistance:getDistance,
}