import { act, cleanup, fireEvent, render, screen, waitFor } from '@testing-library/react';
import { afterEach, beforeEach, describe, expect, it, vi } from 'vitest';
import de from '@/messages/de.json';

/**
 * picture-frame-config-form.test — NEU (quick-260921-pi9). Texte aus der
 * echten de.json (Muster widget-settings-panel.test.tsx): Auswahlfelder,
 * Eintragsliste mit Vorschau/Unterschrift/Pfeilen/Entfernen, Upload-Kette,
 * https-Pruefung, Grenze 30.
 */
vi.mock('next-intl', async (importOriginal) => {
  // Echter ICU-Uebersetzer von next-intl auf der echten de.json: die
  // Intervall-Beschriftung nutzt `{n, plural, one {…} other {…}}`, ein
  // handgeschriebener `{n}`-Ersatz wuerde das Muster nicht verstehen.
  const actual = await importOriginal<typeof import('next-intl')>();
  const messages = (await import('@/messages/de.json')).default;
  return {
    useTranslations: (ns?: string) => actual.createTranslator({ locale: 'de', messages, namespace: ns }),
  };
});

const { uploadMock, deleteMock } = vi.hoisted(() => ({
  uploadMock: vi.fn(),
  deleteMock: vi.fn(),
}));
vi.mock('@/lib/dashboard-images-api', () => ({
  uploadDashboardImage: uploadMock,
  deleteDashboardImage: deleteMock,
  dashboardImageSrc: (id: string) => `/api-proxy/dashboard/images/${encodeURIComponent(id)}`,
}));

import { PictureFrameConfigForm } from './picture-frame-config-form';

const texts = (de as { widgets: { pictureFrame: Record<string, string> } }).widgets.pictureFrame;
const URL_A = 'https://bilder.example/a.jpg';

function renderForm(config: Record<string, unknown>) {
  const onChange = vi.fn();
  render(<PictureFrameConfigForm config={config} onChange={onChange} />);
  return { onChange };
}

beforeEach(() => {
  uploadMock.mockReset();
  deleteMock.mockReset();
  deleteMock.mockResolvedValue(undefined);
});

afterEach(() => {
  cleanup();
});

describe('PictureFrameConfigForm (quick-260921-pi9)', () => {
  it('Test 1: drei Auswahlfelder mit Vorgaben; jede Aenderung ruft onChange mit genau dem einen Feld', () => {
    const { onChange } = renderForm({});
    const fit = screen.getByLabelText(texts.fitLabel) as HTMLSelectElement;
    const interval = screen.getByLabelText(texts.intervalLabel) as HTMLSelectElement;
    const order = screen.getByLabelText(texts.orderLabel) as HTMLSelectElement;
    expect(fit.value).toBe('contain');
    expect(interval.value).toBe('30');
    expect(order.value).toBe('sequence');
    expect(Array.from(interval.options).map((o) => o.value)).toEqual([
      '0', '5', '10', '15', '30', '60', '120', '300', '600', '1800', '3600',
    ]);
    expect(Array.from(interval.options).map((o) => o.textContent)).toContain('Kein Wechsel');
    expect(Array.from(interval.options).map((o) => o.textContent)).toContain('5 Sekunden');
    expect(Array.from(interval.options).map((o) => o.textContent)).toContain('30 Minuten');
    expect(Array.from(interval.options).map((o) => o.textContent)).toContain('1 Minute');

    fireEvent.change(fit, { target: { value: 'cover' } });
    expect(onChange).toHaveBeenLastCalledWith({ fit: 'cover' });
    fireEvent.change(interval, { target: { value: '120' } });
    expect(onChange).toHaveBeenLastCalledWith({ intervalSeconds: 120 });
    fireEvent.change(order, { target: { value: 'random' } });
    expect(onChange).toHaveBeenLastCalledWith({ order: 'random' });
    expect(onChange).toHaveBeenCalledTimes(3);
  });

  it('Test 2: Liste zeigt je Eintrag Vorschau (no-referrer, Upload ueber Proxy-Pfad); kaputte Vorschau wird zu "Bild nicht verfügbar"', () => {
    renderForm({
      images: [
        { kind: 'url', url: URL_A },
        { kind: 'upload', imageId: 'img-1' },
      ],
    });
    const previews = screen.getAllByTestId('picture-frame-preview') as HTMLImageElement[];
    expect(previews).toHaveLength(2);
    expect(previews[0].getAttribute('src')).toBe(URL_A);
    expect(previews[0].getAttribute('referrerpolicy')).toBe('no-referrer');
    expect(previews[1].getAttribute('src')).toBe('/api-proxy/dashboard/images/img-1');

    fireEvent.error(previews[0]);
    expect(screen.getAllByTestId('picture-frame-preview')).toHaveLength(1);
    expect(screen.getByText(texts.unavailable)).toBeInTheDocument();
  });

  it('Test 3: Unterschrift — Entwurf im Feld, Uebernahme bei Blur/Enter mit dem GANZEN images-Array; unveraendert -> kein Aufruf', () => {
    const { onChange } = renderForm({
      images: [
        { kind: 'url', url: URL_A, caption: 'Alt' },
        { kind: 'upload', imageId: 'img-1' },
      ],
    });
    const inputs = screen.getAllByLabelText(texts.captionPlaceholder) as HTMLInputElement[];
    expect(inputs[0].value).toBe('Alt');
    expect(inputs[1].value).toBe('');

    fireEvent.change(inputs[1], { target: { value: 'Neu' } });
    expect(onChange).not.toHaveBeenCalled();
    fireEvent.keyDown(inputs[1], { key: 'Enter' });
    expect(onChange).toHaveBeenCalledWith({
      images: [
        { kind: 'url', url: URL_A, caption: 'Alt' },
        { kind: 'upload', imageId: 'img-1', caption: 'Neu' },
      ],
    });

    // Leer machen entfernt die Unterschrift, Blur uebernimmt
    fireEvent.change(inputs[0], { target: { value: '  ' } });
    fireEvent.blur(inputs[0]);
    expect(onChange).toHaveBeenLastCalledWith({
      images: [
        { kind: 'url', url: URL_A },
        { kind: 'upload', imageId: 'img-1' },
      ],
    });

    // Unveraendert: kein weiterer Aufruf
    const calls = onChange.mock.calls.length;
    fireEvent.blur(inputs[1]);
    expect(onChange).toHaveBeenCalledTimes(calls);
  });

  it('Test 4: Pfeile — oberster ohne "hoch", unterster ohne "runter"; Bewegen sendet das ganze Array in neuer Reihenfolge', () => {
    const { onChange } = renderForm({
      images: [
        { kind: 'url', url: URL_A },
        { kind: 'upload', imageId: 'img-1' },
        { kind: 'upload', imageId: 'img-2' },
      ],
    });
    const ups = screen.getAllByRole('button', { name: texts.moveUpButton }) as HTMLButtonElement[];
    const downs = screen.getAllByRole('button', { name: texts.moveDownButton }) as HTMLButtonElement[];
    expect(ups[0].disabled).toBe(true);
    expect(ups[1].disabled).toBe(false);
    expect(downs[2].disabled).toBe(true);
    expect(downs[1].disabled).toBe(false);

    fireEvent.click(downs[0]);
    expect(onChange).toHaveBeenLastCalledWith({
      images: [
        { kind: 'upload', imageId: 'img-1' },
        { kind: 'url', url: URL_A },
        { kind: 'upload', imageId: 'img-2' },
      ],
    });
    fireEvent.click(ups[2]);
    expect(onChange).toHaveBeenLastCalledWith({
      images: [
        { kind: 'url', url: URL_A },
        { kind: 'upload', imageId: 'img-2' },
        { kind: 'upload', imageId: 'img-1' },
      ],
    });
  });

  it('Test 5: Entfernen eines Upload-Eintrags ruft deleteDashboardImage (Fehler verschluckt) UND onChange mit dem verkuerzten Array; URL-Eintrag ohne Serveraufruf', async () => {
    deleteMock.mockRejectedValue(new Error('weg'));
    const { onChange } = renderForm({
      images: [
        { kind: 'upload', imageId: 'img-1' },
        { kind: 'url', url: URL_A },
      ],
    });
    const removes = screen.getAllByRole('button', { name: texts.removeButton });

    fireEvent.click(removes[0]);
    expect(deleteMock).toHaveBeenCalledWith('img-1');
    expect(onChange).toHaveBeenLastCalledWith({ images: [{ kind: 'url', url: URL_A }] });
    await act(async () => {
      await Promise.resolve();
    });

    fireEvent.click(removes[1]);
    expect(deleteMock).toHaveBeenCalledTimes(1);
    expect(onChange).toHaveBeenLastCalledWith({ images: [{ kind: 'upload', imageId: 'img-1' }] });
  });

  it('Test 6: Webadresse — http:// zeigt role=alert und ruft onChange nicht; https ruft onChange mit angehaengtem URL-Eintrag', () => {
    const { onChange } = renderForm({ images: [{ kind: 'upload', imageId: 'img-1' }] });
    const input = screen.getByLabelText(texts.urlAddButton) as HTMLInputElement;
    const button = screen.getByRole('button', { name: texts.urlAddButton });

    fireEvent.change(input, { target: { value: 'http://bilder.example/a.jpg' } });
    fireEvent.click(button);
    expect(screen.getByRole('alert')).toHaveTextContent(texts.urlInvalid);
    expect(onChange).not.toHaveBeenCalled();

    fireEvent.change(input, { target: { value: URL_A } });
    expect(screen.queryByRole('alert')).not.toBeInTheDocument();
    fireEvent.keyDown(input, { key: 'Enter' });
    expect(onChange).toHaveBeenCalledWith({
      images: [
        { kind: 'upload', imageId: 'img-1' },
        { kind: 'url', url: URL_A },
      ],
    });
    expect(input.value).toBe('');
  });

  it('Test 7: Datei waehlen ruft uploadDashboardImage(file) und danach onChange mit neuem Upload-Eintrag (Kennung aus der Antwort)', async () => {
    uploadMock.mockResolvedValue({ id: 'neu-42', originalName: 'a.png', mimeType: 'image/png', size: 3 });
    const { onChange } = renderForm({ images: [{ kind: 'url', url: URL_A }] });
    const file = new File([new Uint8Array([1, 2, 3])], 'a.png', { type: 'image/png' });
    const input = screen.getByTestId('picture-frame-file-input') as HTMLInputElement;

    await act(async () => {
      fireEvent.change(input, { target: { files: [file] } });
    });

    expect(uploadMock).toHaveBeenCalledWith(file);
    await waitFor(() =>
      expect(onChange).toHaveBeenCalledWith({
        images: [
          { kind: 'url', url: URL_A },
          { kind: 'upload', imageId: 'neu-42' },
        ],
      }),
    );
    expect(screen.queryByRole('alert')).not.toBeInTheDocument();
  });

  it('Test 8: wirft der Upload, erscheint seine Meldung als role=alert und onChange bleibt aus', async () => {
    uploadMock.mockRejectedValue(new Error('Nur Bilder im Format PNG, JPEG, GIF oder WebP sind erlaubt.'));
    const { onChange } = renderForm({});
    const input = screen.getByTestId('picture-frame-file-input') as HTMLInputElement;

    await act(async () => {
      fireEvent.change(input, { target: { files: [new File([1], 'x.png')] } });
    });

    await waitFor(() =>
      expect(screen.getByRole('alert')).toHaveTextContent(
        'Nur Bilder im Format PNG, JPEG, GIF oder WebP sind erlaubt.',
      ),
    );
    expect(onChange).not.toHaveBeenCalled();
  });

  it('Test 9: bei 30 Eintraegen ist "Bild hochladen" deaktiviert, der Hinweis limitReached steht, Webadresse ebenfalls gesperrt', () => {
    const images = Array.from({ length: 30 }, (_, i) => ({ kind: 'upload', imageId: `img-${i}` }));
    renderForm({ images });
    const upload = screen.getByRole('button', { name: texts.uploadButton }) as HTMLButtonElement;
    expect(upload.disabled).toBe(true);
    expect(screen.getByTestId('picture-frame-limit')).toHaveTextContent(texts.limitReached);
    expect((screen.getByRole('button', { name: texts.urlAddButton }) as HTMLButtonElement).disabled).toBe(true);
    expect(screen.getAllByTestId('picture-frame-entry')).toHaveLength(30);
  });
});