import { Label, requestRender, type TextField, ui } from '../../ui';

/**
 * What a form that can be refused shows about its last attempt – the sign-in screen and the
 * password dialog: the warning line under the fields, and whether an answer is still awaited.
 */
export class FormStatus {
  readonly message = new Label('', { style: 'warning' });
  private waiting = false;

  /** `onChange` redoes what the form shows of it: its button while waiting, its layout after a message. */
  constructor(private readonly onChange: (busy: boolean) => void) {}

  get busy(): boolean {
    return this.waiting;
  }

  /** What the check scripts read. */
  info(): { message: string; busy: boolean } {
    return { message: this.message.text, busy: this.waiting };
  }

  say(message: string): void {
    this.message.setText(message);
    this.changed();
  }

  setBusy(busy: boolean): void {
    this.waiting = busy;
    this.changed();
  }

  private changed(): void {
    this.onChange(this.waiting);
    requestRender();
  }
}

/**
 * Puts the caret back into a field after a refused attempt. A field blurs itself once its Enter
 * has been handled, and that happens after this call returns – so the focus has to be set again
 * behind it, or the next thing typed goes nowhere.
 */
export function refocus(field: TextField): void {
  queueMicrotask(() => ui().focus.focus(field));
}