export const stringify = (json) => {
  const urlEncode = (param, key, encode) => {
    if (param === null) return '';
    let paramStr = '';
    const t = typeof (param);
    if (t === 'string' || t === 'number' || t === 'boolean') {
      paramStr = `&${key}=${((encode === null || encode) ? encodeURIComponent(param) : param)}`;
    } else {
      for (const i in param) {
        if (i) {
          if (param[i] !== undefined && param[i] !== '' && !(param[i] && typeof param[i] === 'string' && /^\s+$/.test(param[i]))) {
            const k = key == null ? i : `${key}${(param instanceof Array ? `[${i}]` : `.${i}`)}`;
            paramStr += urlEncode(param[i], k, encode);
          }
        }
      }
    }
    return paramStr;
  };
  return urlEncode(json).substring(1);
}

export const parse = (url) => {
  let obj = {};// 创建一个Object
  let reg = /[?&][^?&]+=[^?&]+/g;// 正则匹配 ?&开始 =拼接  非?&结束  的参数
  let arr = url.match(reg);// match() 方法可在字符串内检索指定的值，或找到一个或多个正则表达式的匹配。
  // arr数组形式 ['?id=12345','&a=b']
  if (arr) {
    arr.forEach((item) => {
      /**
       * tempArr数组    ['id','12345']和['a','b']
      * 第一个是key，第二个是value
      * */
      let tempArr = item.substring(1).split('=');
      let key = decodeURIComponent(tempArr[0]);
      let val = decodeURIComponent(tempArr[1]);
      obj[key] = val;
    });
  }
  return obj;
}

export const getUUID = (len, radix) => {
  var chars = '0123456789ABCDEFGHIJKLMNOPQRSTUVWXYZabcdefghijklmnopqrstuvwxyz'.split('');
  var uuid = [], i;
  radix = radix || chars.length;

  if (len) {
    // Compact form
    for (i = 0; i < len; i++) uuid[i] = chars[0 | Math.random()*radix];
  } else {
    // rfc4122, version 4 form
    var r;

    // rfc4122 requires these characters
    uuid[8] = uuid[13] = uuid[18] = uuid[23] = '-';
    uuid[14] = '4';

    // Fill in random data.  At i==19 set the high bits of clock sequence as
    // per rfc4122, sec. 4.1.5
    for (i = 0; i < 36; i++) {
      if (!uuid[i]) {
        r = 0 | Math.random()*16;
        uuid[i] = chars[(i == 19) ? (r & 0x3) | 0x8 : r];
      }
    }
  }

  return uuid.join('');
}