const validator = {
  get(target, name) {
    // eslint-disable-next-line no-prototype-builtins
    if (!target.hasOwnProperty(name)) {
      throw new Error(`"${name}" value does not exist in the enum`);
    } else if (typeof target[name] === 'object' && target[name] != null) {
      return new Proxy(target[name], validator);
    } else {
      return target[name];
    }
  },
  set(target, name, value) {
    throw new Error('Cannot add a new value to the enum');
  }
};

export function Enum(baseEnum) {
  return new Proxy(baseEnum, validator);
}