import { render, screen, within } from '@testing-library/react';
import { afterEach, describe, expect, it, vi } from 'vitest';
import { QueryClient, QueryClientProvider } from '@tanstack/react-query';
import App from './App';
import { clearToken, setToken } from './lib/auth-storage';

// Stub the network layer so stub screens render without real requests.
vi.mock('./lib/api', async () => {
  const actual = await vi.importActual<typeof import('./lib/api')>('./lib/api');
  return {
    ...actual,
    apiFetch: vi.fn().mockResolvedValue([]),
  };
});

function renderApp() {
  const queryClient = new QueryClient({ defaultOptions: { queries: { retry: false } } });
  return render(
    <QueryClientProvider client={queryClient}>
      <App />
    </QueryClientProvider>,
  );
}

describe('App', () => {
  afterEach(() => {
    clearToken();
  });

  it('shows the login screen when there is no token', () => {
    clearToken();
    renderApp();
    expect(screen.getByText('E-mailadres')).toBeInTheDocument();
    expect(screen.getByRole('button', { name: 'Inloggen' })).toBeInTheDocument();
  });

  it('shows the tab bar when a token is present', () => {
    setToken('tok');
    renderApp();
    const tabbar = within(screen.getByRole('navigation'));
    expect(tabbar.getByText('Stopwatch')).toBeInTheDocument();
    expect(tabbar.getByText('Geschiedenis')).toBeInTheDocument();
    expect(tabbar.getByText('Account')).toBeInTheDocument();
  });

  it('lifecycle: unauthenticated renders Login (no nav); authenticated renders Stopwatch under the tab bar', () => {
    // No token -> the Login screen, and no tab bar navigation.
    clearToken();
    const { unmount } = renderApp();
    expect(screen.getByText('E-mailadres')).toBeInTheDocument();
    expect(screen.queryByRole('navigation')).not.toBeInTheDocument();
    unmount();

    // Token present -> the Stopwatch screen is mounted at "/" beside the tab bar.
    setToken('tok');
    renderApp();
    expect(screen.getByText('Type zool')).toBeInTheDocument();
    expect(within(screen.getByRole('navigation')).getByText('Stopwatch')).toBeInTheDocument();
    expect(screen.queryByText('E-mailadres')).not.toBeInTheDocument();
  });
});