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 getQueryString = (url)=> {
  var queryParts = url.slice(url.indexOf("?") + 1).split('&');
    var params = queryParts.length > 0 ? {} : null;
    queryParts.map(function (item) {
      var a = item.split('=')
      params[a[0]] = a[1]
    })
    return params
} 

function timestampToTime(timestamp, type) {
  if (timestamp) {
    var date = new Date(timestamp * 1000);
  } else {
    var date = new Date();
  }
  var Y = date.getFullYear();
  var M = (date.getMonth() + 1 < 10 ? '0' + (date.getMonth() + 1) : date.getMonth() + 1);
  var D = formatNumber(date.getDate());
  var h = formatNumber(date.getHours());
  var m = formatNumber(date.getMinutes());
  var s = formatNumber(date.getSeconds());
  if (type) {
    if (type == '0') {
      return Y + '-' + M + '-' + D;
    } else if (type == '1') {
      return h + ":" + m;
    } else if (type == '2') {
      return Y + '年' + M + '月' + D + '日';
    } else if (type == '3') {
      return M + '月' + D + '日';
    } else if(type==='5'){
      return Y + '-' + M + '-' + D + ' ' + h + ":" + m + ":" + s;
    }else if(type==='6'){
      return M + '.' + D;
    }else {
      return Y + '.' + M + '.' + D;
    }
  } else {
    return Y + '-' + M + '-' + D + ' ' + h + ":" + m + ":" + s;
  }
}

const randomString = (len)  => {
  　　len = len || 32;
  　　var chars = 'ABCDEFGHJKMNPQRSTWXYZabcdefhijkmnprstwxyz2345678';    /****默认去掉了容易混淆的字符oOLl,9gq,Vv,Uu,I1****/
  　　var maxPos = chars.length;
  　　var pwd = '';
  　　for (let i = 0; i < len; i++) {
  　　　　pwd += chars.charAt(Math.floor(Math.random() * maxPos));
  　　}
  　　return pwd;
  }
  function sha1(s) {
    var data = new Uint8Array(encodeUTF8(s))
    var i, j, t;
    var l = ((data.length + 8) >>> 6 << 4) + 16, s = new Uint8Array(l << 2);
    s.set(new Uint8Array(data.buffer)), s = new Uint32Array(s.buffer);
    for (t = new DataView(s.buffer), i = 0; i < l; i++)s[i] = t.getUint32(i << 2);
    s[data.length >> 2] |= 0x80 << (24 - (data.length & 3) * 8);
    s[l - 1] = data.length << 3;
    var w = [], f = [
      function () { return m[1] & m[2] | ~m[1] & m[3]; },
      function () { return m[1] ^ m[2] ^ m[3]; },
      function () { return m[1] & m[2] | m[1] & m[3] | m[2] & m[3]; },
      function () { return m[1] ^ m[2] ^ m[3]; }
    ], rol = function (n, c) { return n << c | n >>> (32 - c); },
      k = [1518500249, 1859775393, -1894007588, -899497514],
      m = [1732584193, -271733879, null, null, -1009589776];
    m[2] = ~m[0], m[3] = ~m[1];
    for (i = 0; i < s.length; i += 16) {
      var o = m.slice(0);
      for (j = 0; j < 80; j++)
        w[j] = j < 16 ? s[i + j] : rol(w[j - 3] ^ w[j - 8] ^ w[j - 14] ^ w[j - 16], 1),
          t = rol(m[0], 5) + f[j / 20 | 0]() + m[4] + w[j] + k[j / 20 | 0] | 0,
          m[1] = rol(m[1], 30), m.pop(), m.unshift(t);
      for (j = 0; j < 5; j++)m[j] = m[j] + o[j] | 0;
    };
    t = new DataView(new Uint32Array(m).buffer);
    for (var i = 0; i < 5; i++)m[i] = t.getUint32(i << 2);

    var hex = Array.prototype.map.call(new Uint8Array(new Uint32Array(m).buffer), function (e) {
      return (e < 16 ? "0" : "") + e.toString(16);
    }).join("");
    return hex;
  }

  function encodeUTF8(s) {
    var i, r = [], c, x;
    for (i = 0; i < s.length; i++)
      if ((c = s.charCodeAt(i)) < 0x80) r.push(c);
      else if (c < 0x800) r.push(0xC0 + (c >> 6 & 0x1F), 0x80 + (c & 0x3F));
      else {
        if ((x = c ^ 0xD800) >> 10 == 0) //对四字节UTF-16转换为Unicode
          c = (x << 10) + (s.charCodeAt(++i) ^ 0xDC00) + 0x10000,
            r.push(0xF0 + (c >> 18 & 0x7), 0x80 + (c >> 12 & 0x3F));
        else r.push(0xE0 + (c >> 12 & 0xF));
        r.push(0x80 + (c >> 6 & 0x3F), 0x80 + (c & 0x3F));
      };
    return r;
  }
module.exports = {
  formatTime: formatTime,
  getQueryString: getQueryString,
  timestampToTime: timestampToTime,
  randomString: randomString,
  sha1: sha1
}