import { useForm } from 'react-hook-form';
import { fluentValidationResolver } from '@hookform/resolvers/fluentvalidation-ts';
import { Validator } from 'fluentvalidation-ts';

class FormDataValidator extends Validator<FormData> {
  constructor() {
    super();

    this.ruleFor('username')
      .notEmpty()
      .withMessage('username is a required field');
    this.ruleFor('password')
      .notEmpty()
      .withMessage('password is a required field');
  }
}

const App = () => {
  const { register, handleSubmit } = useForm({
    resolver: fluentValidationResolver(new FormDataValidator()),
  });

  return (
    <form onSubmit={handleSubmit((d) => console.log(d))}>
      <input {...register('username')} />
      {errors.username && <span role="alert">{errors.username.message}</span>}
      <input {...register('password')} />
      {errors.password && <span role="alert">{errors.password.message}</span>}
      <button type="submit">submit</button>
    </form>
  );
};