import { act, cleanup, render, screen } from '@testing-library/react';
import { afterEach, describe, expect, it, vi } from 'vitest';
import { DesktopDownloadLinks } from './desktop-download-links';

/**
 * desktop-download-links.test — Link-Block auf der Anmeldeseite (18-03).
 * next-intl-Mock nach dem Muster in widget-settings-panel.test.tsx
 * (de.json-gestuetzt), `@/lib/desktop` gemockt mit steuerbarem
 * `loadDesktopLatest`; `desktopDownloadUrl` wird echt durchgereicht.
 */
vi.mock('next-intl', async () => {
  const messages = (await import('@/messages/de.json')).default as Record<string, unknown>;
  const lookup = (path: string): string | undefined =>
    path.split('.').reduce<unknown>((o, k) => (o && typeof o === 'object' ? (o as any)[k] : undefined), messages) as
      | string
      | undefined;
  return {
    useTranslations:
      (ns?: string) =>
      (key: string, values?: Record<string, unknown>) => {
        const raw = lookup(ns ? `${ns}.${key}` : key) ?? key;
        return values ? raw.replace(/\{(\w+)\}/g, (_: string, n: string) => String(values[n] ?? '')) : raw;
      },
    useLocale: () => 'de',
  };
});

const { loadDesktopLatest } = vi.hoisted(() => ({ loadDesktopLatest: vi.fn() }));

vi.mock('@/lib/desktop', async (importOriginal) => {
  const actual = await importOriginal<typeof import('@/lib/desktop')>();
  return {
    ...actual,
    loadDesktopLatest,
  };
});

function clearDesktopCookie() {
  document.cookie = 'tessera_desktop=; expires=Thu, 01 Jan 1970 00:00:00 GMT; path=/';
}

afterEach(() => {
  cleanup();
  vi.clearAllMocks();
  clearDesktopCookie();
});

const windowsFile = {
  name: 'Tessera-Setup-1.1.0.exe',
  size: 6123456,
  sha256: 'x',
  url: '/desktop/download/windows',
};
const linuxFile = {
  name: 'Tessera-1.1.0.AppImage',
  size: 106461688,
  sha256: 'y',
  url: '/desktop/download/linux',
};

describe('DesktopDownloadLinks (18-03)', () => {
  it('Test 1 (keine Daten): rendert nichts, solange null zurueckkommt', async () => {
    loadDesktopLatest.mockResolvedValue(null);
    const { container } = render(<DesktopDownloadLinks />);
    await vi.waitFor(() => expect(loadDesktopLatest).toHaveBeenCalled());
    expect(container.firstChild).toBeNull();
  });

  it('Test 2 (beide Plattformen): Windows-Hauptlink, Linux-Kurzlink, Version', async () => {
    loadDesktopLatest.mockResolvedValue({
      version: '1.1.0',
      channel: 'beta',
      commit: 'abc1234',
      buildTime: 'x',
      files: { windows: windowsFile, linux: linuxFile },
    });
    render(<DesktopDownloadLinks />);

    const windowsLink = await screen.findByText('Desktop-App herunterladen (Windows)');
    expect(windowsLink.closest('a')).toHaveAttribute('href', 'http://localhost:3001/desktop/download/windows');

    const linuxLink = screen.getByText('Linux-Version');
    expect(linuxLink.closest('a')).toHaveAttribute('href', 'http://localhost:3001/desktop/download/linux');

    expect(screen.getByText('Version 1.1.0')).toBeInTheDocument();
  });

  it('Test 3 (nur Linux): genau ein Link mit dem Linux-Text', async () => {
    loadDesktopLatest.mockResolvedValue({
      version: '1.1.0',
      channel: 'beta',
      commit: 'abc1234',
      buildTime: 'x',
      files: { linux: linuxFile },
    });
    render(<DesktopDownloadLinks />);

    const linuxLink = await screen.findByText('Desktop-App herunterladen (Linux)');
    expect(linuxLink.closest('a')).toHaveAttribute('href', 'http://localhost:3001/desktop/download/linux');
    expect(screen.queryByText('Linux-Version')).not.toBeInTheDocument();
  });

  it('Test 4 (im Desktop-Client): rendert nichts und fragt /desktop/latest gar nicht erst an', async () => {
    document.cookie = 'tessera_desktop=1; path=/';
    loadDesktopLatest.mockResolvedValue({
      version: '1.1.0',
      channel: 'beta',
      commit: 'abc1234',
      buildTime: 'x',
      files: { windows: windowsFile, linux: linuxFile },
    });
    const { container } = render(<DesktopDownloadLinks />);
    await act(async () => {});
    expect(loadDesktopLatest).not.toHaveBeenCalled();
    expect(container.firstChild).toBeNull();
  });
});