function NoToChinese(num) {  
  num = String(num)
  var chnNumChar = ["零","一","二","三","四","五","六","七","八","九","十"];
  if(num == 0){  
    return chnNumChar[0];  
  }     
  let tmp = ''
  for (let i = 0; i < num.length; i++) {
    let ele = num.charAt(i)
    tmp += chnNumChar[ele]
  }
   
  return tmp;  
}  

function randomWord (randomFlag, min, max) {
  let str = ''
  let range = min
  let arr = ['0', '1', '2', '3', '4', '5', '6', '7', '8', '9', 'a', 'b', 'c', 'd', 'e', 'f', 'g', 'h', 'i', 'j', 'k', 'l', 'm', 'n', 'o', 'p', 'q', 'r', 's', 't', 'u', 'v', 'w', 'x', 'y', 'z', 'A', 'B', 'C', 'D', 'E', 'F', 'G', 'H', 'I', 'J', 'K', 'L', 'M', 'N', 'O', 'P', 'Q', 'R', 'S', 'T', 'U', 'V', 'W', 'X', 'Y', 'Z']
  // 随机产生
  if (randomFlag) {
    range = Math.round(Math.random() * (max - min)) + min
  }
  for (var i = 0; i < range; i++) {
    let pos = Math.round(Math.random() * (arr.length - 1))
    str += arr[pos]
  }
  return str
}

module.exports = {
  formatDate: function(time) {
    var weekArr = ["日", "一", "二", "三", "四", "五", "六"];
    var date = new Date(time);
    var year = date.getFullYear();
    var month = date.getMonth() + 1;
    var day = date.getDate();
    var week = "星期" + weekArr[date.getDay()];
    if (window.innerWidth < 1700) {
      return (
        year +
        "年" +
        (String(month).length > 1 ? month : "0" + month) +
        "月" +
        (String(day).length > 1 ? day : "0" + day) +
        "日" +
        "<br/>" +
        week
      );
    }
    return (
      year +
      "年" +
      (String(month).length > 1 ? month : "0" + month) +
      "月" +
      (String(day).length > 1 ? day : "0" + day) +
      "日" +
      " " +
      week
    );
  },
  smoothscrollpos: function(domName) {
    if (domName == "/") {
      return window.scrollTo(0, 0);
    }
    let smoothscroll = () => {
      let dom = document.getElementById(domName);
      // window.scrollTo({
      //   top:dom.offsetTop - 100,
      //   left:0,
      //   behavior: "smooth"
      // })
      dom && window.scrollTo(0, dom.offsetTop - 120);
    };
    smoothscroll();
  },
  
  formatTime: function(time, fan = false) {
    let t1 = time.split(" ")[0].split("-");
    if (fan) {
      t1 = t1.map((item) => {
        let t = NoToChinese(item);
        return t;
      });
    }
    return t1;
  },
  encodeStr: function (str, strv = '') {
    const NUM = 2
    const front = randomWord(false, 8)
    const middle = randomWord(false, 8)
    const end = randomWord(false, 8)

    let str1 = str.substring(0, NUM)
    let str2 = str.substring(NUM)

    if (strv) {
      let strv1 = strv.substring(0, NUM)
      let strv2 = strv.substring(NUM)
      return [front + str2 + middle + str1 + end, front + strv2 + middle + strv1 + end]
    }

    return front + str2 + middle + str1 + end
  }
};