let getFormatDate = function (value) {
  if (value === undefined || value === "") {
    return '';
  }
  let str = value;
  if (parseInt(value) < 10) {
    str = '0' + value;
  }
  return str;
}
let getNowDate = function () {
  let d = new Date();
  let year = d.getFullYear();
  let month = d.getMonth() + 1;
  let day = d.getDate();
  return year + '-' + getFormatDate(month) + '-' + getFormatDate(day);
}
export function getAge(startDateStr, endDateStr) {
  //计算两个日期相差多少年
  endDateStr = endDateStr||getNowDate()
  let startDate = new Date(startDateStr);
  let endDate = new Date(endDateStr);
  let yearNum = endDate.getFullYear() - startDate.getFullYear()-1;
  //获取两个日期（月+日）部分
  let sStr = startDateStr.substring(5, 10);
  let eStr = getNowDate().substring(5, 10);
  //判断两个日期大小
  //判断是否过生日
  if (new Date(sStr) <= new Date(eStr)) {
    return yearNum + 1;
  }
  else {
    return yearNum;
  }
}

export function timeTrans({
  time,
  format
}) {
  let timer = time || new Date();
  let date = new Date(timer);
  let obj = {
    Y: '',
    M: '',
    D: '',
    h: '',
    m: '',
    s: ''
  }
  obj.Y = date.getFullYear();
  obj.M = date.getMonth() + 1;
  obj.M = obj.M < 10 ? "0" + obj.M : obj.M;
  obj.D = date.getDate();
  obj.D = obj.D < 10 ? "0" + obj.D : obj.D;
  obj.h = date.getHours();
  obj.h = obj.h < 10 ? "0" + obj.h : obj.h;
  obj.m = date.getMinutes();
  obj.m = obj.m < 10 ? "0" + obj.m : obj.m;
  obj.s = date.getSeconds();
  obj.s = obj.s < 10 ? "0" + obj.s : obj.s;
  if (format) {
    let str = '';
    for (let index in format) {
      str += `${obj[format[index]] || format[index]}`;
    }
    return str;
  } else {
    return `${obj.Y}-${obj.M}-${obj.D}`
  }
}


(function(doc, win) {
	var docEl = doc.documentElement,
		resizeEvt = 'orientationchange' in window ? 'orientationchange' : 'resize',
		recalc = function() {
			var clientWidth = docEl.clientWidth;
			var fontSize = 20;
			docEl.style.fontSize = fontSize + 'px';
			var docStyles = getComputedStyle(docEl);
			var realFontSize = parseFloat(docStyles.fontSize);
			var scale = realFontSize / fontSize;
			console.log("realFontSize: " + realFontSize + ", scale: " + scale);
			fontSize = clientWidth / 667 * 20;
			if (isIphoneX()) fontSize = 19;
			fontSize = fontSize / scale;
			docEl.style.fontSize = fontSize + 'px';
		};
	// Abort if browser does not support addEventListener
	if (!doc.addEventListener) return;
	win.addEventListener(resizeEvt, recalc, false);
	doc.addEventListener('DOMContentLoaded', recalc, false);

	// iphoneX判断
	function isIphoneX() {
		return /iphone/gi.test(navigator.userAgent) && (win.screen.height == 812 && win.screen.width == 375)
	}

})(document, window);