State

export interface FormValidationResult<E> {
  formValue: FormValue;
  formErrors: FieldErrorsMap<E>;
}

export type FormSubmission<V> = Action<
  [event: SubmitEvent],
  FormValidationResult<AnyFormValueValidatorError<V>>,
  unknown
>;

export type FieldsValidation<V> = Action<
  [config: Config, value: FieldValue],
  FieldError<AnyFieldValueValidatorError<V>>[],
  unknown
>;

export interface FormState<T, V extends Validator> {
  readonly context: FormContext;
  readonly submission: FormSubmission<V>;
  readonly fieldsValidation: FieldsValidation<V>;
  /**
   * An accessor that maintains form state consistency:
   *
   * - A snapshot of the form state is returned on access
   * - Default values from JSON Schema are taken into account during assignment
   *
   * You can gain direct access to the internal state by hacking types:
   *
   * `(form.context as FormInternalContext<typeof validator>).value`
   */
  value: T | undefined;
  isSubmitted: boolean;
  isChanged: boolean;
  errors: FieldErrorsMap<PossibleError<V>>;
  submit(e: SubmitEvent): void;
  reset(e: Event): void;
}