const firstWordToUpper = function (str) {
  return str.substr(0,1).toLocaleUpperCase() + str.substr(1);
};

const firstWordToLower = function (str,type?) {
  return str.substr(0,1).toLocaleLowerCase() + str.substr(1);
};

// 路径转驼峰写法
const pathToCamelCase = function (path, firstLower:boolean = false) {
  var parts = path ? path.split('/') : [];

  var output = '';
  for (var i = 0, n = parts.length; i < n; i++) {
    var part = parts[i];
    output = output + firstWordToUpper(part);
  }

  // 首字母是否小写(默认为大写)
  return firstLower ? firstWordToLower(output, 'lower') : output;
};

/**
 * 将旧式类似/home/index/123转化为HomeIndexPage
 * @param path 路由配置里的路径
 */
const pathToPageName = function (path: string, suffix:string = 'Page'):string{
  // 隔离/:id类似的情况
  let tempArr = path ? path.split('/:') : [];
  if(tempArr.length > 1) tempArr.pop(); // 移除/:XX后的字符
  path = tempArr.join('');

  tempArr = path.split('?'); // 移除查询字符串
  if(tempArr.length > 1) tempArr.pop();
  path = tempArr.join('');

  if(path.indexOf('/') >-1 ) {
    return pathToCamelCase(path) + suffix;
  }else if(path.indexOf(suffix) === -1){
    return path + suffix;
  }else{
    return path;
  }
}

export {
  firstWordToUpper,
  firstWordToLower,
  pathToCamelCase,
  pathToPageName
};