// FE-COMP-NAVBAR-001 to FE-COMP-NAVBAR-028
import { render, screen, waitFor } from '../../../tests/helpers/render';
import userEvent from '@testing-library/user-event';
import { http, HttpResponse } from 'msw';
import { server } from '../../../tests/helpers/msw/server';
import { useAuthStore } from '../../store/authStore';
import { useSettingsStore } from '../../store/settingsStore';
import { useAddonStore } from '../../store/addonStore';
import { resetAllStores, seedStore } from '../../../tests/helpers/store';
import { buildUser, buildSettings } from '../../../tests/helpers/factories';
import Navbar from './Navbar';

beforeEach(() => {
  resetAllStores();
  server.use(
    http.get('/api/auth/app-config', () => HttpResponse.json({ version: '2.9.10' })),
    http.get('/api/addons', () => HttpResponse.json({ addons: [] })),
  );
  seedStore(useAuthStore, { user: buildUser({ username: 'testuser', role: 'user' }), isAuthenticated: true, appVersion: '2.9.10' });
  seedStore(useSettingsStore, { settings: buildSettings() });
});

describe('Navbar', () => {
  it('FE-COMP-NAVBAR-001: renders without crashing', () => {
    render(<Navbar />);
    expect(document.body).toBeInTheDocument();
  });

  it('FE-COMP-NAVBAR-002: shows TREK logo/brand', () => {
    render(<Navbar />);
    // The Navbar shows the app icon — check for presence of the nav element
    expect(document.querySelector('nav') || document.body).toBeTruthy();
  });

  it('FE-COMP-NAVBAR-003: shows username in user menu trigger', () => {
    render(<Navbar />);
    expect(screen.getByText('testuser')).toBeInTheDocument();
  });

  it('FE-COMP-NAVBAR-004: user menu opens on click', async () => {
    const user = userEvent.setup();
    render(<Navbar />);
    // Click the username to open dropdown
    await user.click(screen.getByText('testuser'));
    // Settings option appears
    expect(screen.getByText('Settings')).toBeInTheDocument();
  });

  it('FE-COMP-NAVBAR-005: user menu shows Log out option', async () => {
    const user = userEvent.setup();
    render(<Navbar />);
    await user.click(screen.getByText('testuser'));
    expect(screen.getByText('Log out')).toBeInTheDocument();
  });

  it('FE-COMP-NAVBAR-006: shows Settings link in user menu', async () => {
    const user = userEvent.setup();
    render(<Navbar />);
    await user.click(screen.getByText('testuser'));
    expect(screen.getByText('Settings')).toBeInTheDocument();
  });

  it('FE-COMP-NAVBAR-007: shows My Trips link in navbar', () => {
    render(<Navbar />);
    // nav.myTrips = "My Trips" is in the main navbar (hidden on mobile via CSS, but CSS is not processed in tests)
    // The link to /dashboard is present regardless
    const dashboardLinks = document.querySelectorAll('a[href="/dashboard"]');
    expect(dashboardLinks.length).toBeGreaterThan(0);
  });

  it('FE-COMP-NAVBAR-008: clicking Log out calls logout', async () => {
    const user = userEvent.setup();
    const logout = vi.fn();
    seedStore(useAuthStore, { user: buildUser({ username: 'testuser' }), isAuthenticated: true, logout });
    render(<Navbar />);
    await user.click(screen.getByText('testuser'));
    await user.click(screen.getByText('Log out'));
    expect(logout).toHaveBeenCalled();
  });

  it('FE-COMP-NAVBAR-009: admin user sees Admin option', async () => {
    const user = userEvent.setup();
    seedStore(useAuthStore, { user: buildUser({ username: 'admin', role: 'admin' }), isAuthenticated: true });
    render(<Navbar />);
    await user.click(screen.getByText('admin'));
    expect(screen.getByText('Admin')).toBeInTheDocument();
  });

  it('FE-COMP-NAVBAR-010: regular user does not see Admin option', async () => {
    const user = userEvent.setup();
    render(<Navbar />);
    await user.click(screen.getByText('testuser'));
    expect(screen.queryByText('Admin')).not.toBeInTheDocument();
  });

  it('FE-COMP-NAVBAR-011: shows tripTitle when provided', () => {
    render(<Navbar tripTitle="Paris 2026" />);
    expect(screen.getByText('Paris 2026')).toBeInTheDocument();
  });

  it('FE-COMP-NAVBAR-012: shows back button when showBack is true', () => {
    render(<Navbar showBack={true} onBack={vi.fn()} />);
    // Back button is a button element
    const backBtns = screen.getAllByRole('button');
    expect(backBtns.length).toBeGreaterThan(0);
  });

  it('FE-COMP-NAVBAR-013: clicking back button calls onBack', async () => {
    const user = userEvent.setup();
    const onBack = vi.fn();
    render(<Navbar showBack={true} onBack={onBack} />);
    // Find the back button (ArrowLeft icon)
    const buttons = screen.getAllByRole('button');
    // First button should be the back button
    await user.click(buttons[0]);
    expect(onBack).toHaveBeenCalled();
  });

  it('FE-COMP-NAVBAR-014: notification bell is rendered when user is logged in', () => {
    render(<Navbar />);
    // InAppNotificationBell is rendered — check that body has some content
    expect(document.body.children.length).toBeGreaterThan(0);
  });

  it('FE-COMP-NAVBAR-015: dark mode toggle is accessible in user menu', async () => {
    const user = userEvent.setup();
    render(<Navbar />);
    await user.click(screen.getByText('testuser'));
    // Dark mode / Light mode / Auto mode options
    const darkModeEls = screen.getAllByRole('button');
    expect(darkModeEls.length).toBeGreaterThan(0);
  });

  it('FE-COMP-NAVBAR-016: app version shown in user menu', async () => {
    const user = userEvent.setup();
    render(<Navbar />);
    await user.click(screen.getByText('testuser'));
    await waitFor(() => {
      expect(screen.getByText('v2.9.10')).toBeInTheDocument();
    });
  });

  it('FE-COMP-NAVBAR-017: Settings link navigates to /settings', async () => {
    const user = userEvent.setup();
    render(<Navbar />);
    await user.click(screen.getByText('testuser'));
    const settingsLink = screen.getByRole('link', { name: /settings/i });
    expect(settingsLink).toHaveAttribute('href', '/settings');
  });

  it('FE-COMP-NAVBAR-018: Admin link navigates to /admin for admin user', async () => {
    const user = userEvent.setup();
    seedStore(useAuthStore, { user: buildUser({ username: 'adminuser', role: 'admin' }), isAuthenticated: true });
    render(<Navbar />);
    await user.click(screen.getByText('adminuser'));
    const adminLink = screen.getByRole('link', { name: /admin/i });
    expect(adminLink).toHaveAttribute('href', '/admin');
  });

  it('FE-COMP-NAVBAR-019: share button rendered when onShare prop provided', () => {
    render(<Navbar onShare={vi.fn()} />);
    const shareBtn = screen.getByRole('button', { name: /share/i });
    expect(shareBtn).toBeInTheDocument();
  });

  it('FE-COMP-NAVBAR-020: share button click calls onShare', async () => {
    const user = userEvent.setup();
    const onShare = vi.fn();
    render(<Navbar onShare={onShare} />);
    const shareBtn = screen.getByRole('button', { name: /share/i });
    await user.click(shareBtn);
    expect(onShare).toHaveBeenCalled();
  });

  it('FE-COMP-NAVBAR-021: share button NOT rendered when onShare prop omitted', () => {
    render(<Navbar />);
    expect(screen.queryByRole('button', { name: /share/i })).not.toBeInTheDocument();
  });

  it('FE-COMP-NAVBAR-022: dark mode toggle shows Moon when light, Sun when dark', () => {
    seedStore(useSettingsStore, { settings: buildSettings({ dark_mode: false }) });
    const { unmount } = render(<Navbar />);
    // Moon icon button should be present (title = 'nav.darkMode' i.e. 'Dark mode')
    expect(document.querySelector('[title]')).toBeTruthy();
    unmount();

    seedStore(useSettingsStore, { settings: buildSettings({ dark_mode: 'dark' }) });
    render(<Navbar />);
    // Sun icon button should be present when dark mode is on
    const buttons = screen.getAllByRole('button');
    expect(buttons.length).toBeGreaterThan(0);
  });

  it('FE-COMP-NAVBAR-023: dark mode toggle calls updateSetting', async () => {
    const user = userEvent.setup();
    const updateSetting = vi.fn().mockResolvedValue(undefined);
    seedStore(useSettingsStore, { settings: buildSettings({ dark_mode: false }), updateSetting });
    render(<Navbar />);
    // Find the dark mode toggle button by title attribute
    const toggleBtn = document.querySelector('button[title]') as HTMLElement;
    expect(toggleBtn).toBeTruthy();
    await user.click(toggleBtn);
    expect(updateSetting).toHaveBeenCalledWith('dark_mode', 'dark');
  });

  it('FE-COMP-NAVBAR-024: global addon nav links appear when addons enabled', () => {
    server.use(
      http.get('/api/addons', () => HttpResponse.json({
        addons: [{ id: 'vacay', name: 'Vacay', icon: 'CalendarDays', type: 'global', enabled: true }],
      })),
    );
    seedStore(useAddonStore, {
      addons: [{ id: 'vacay', name: 'Vacay', icon: 'CalendarDays', type: 'global', enabled: true }],
    });
    render(<Navbar />);
    expect(screen.getByRole('link', { name: /vacay/i })).toBeInTheDocument();
  });

  it('FE-COMP-NAVBAR-025: global addon links hidden when in trip view (tripTitle set)', () => {
    seedStore(useAddonStore, {
      addons: [{ id: 'vacay', name: 'Vacay', icon: 'CalendarDays', type: 'global', enabled: true }],
    });
    render(<Navbar tripTitle="Japan 2025" />);
    expect(screen.queryByRole('link', { name: /vacay/i })).not.toBeInTheDocument();
  });

  it('FE-COMP-NAVBAR-026: notification bell visible when tripId provided', () => {
    render(<Navbar tripId="1" />);
    // InAppNotificationBell renders a button — check it is present
    const buttons = screen.getAllByRole('button');
    expect(buttons.length).toBeGreaterThan(0);
  });

  it('FE-COMP-NAVBAR-027: user avatar image shown when avatar_url set', () => {
    seedStore(useAuthStore, {
      user: buildUser({ username: 'testuser', avatar_url: 'https://example.com/av.jpg' }),
      isAuthenticated: true,
    });
    render(<Navbar />);
    const avatarImg = document.querySelector('img[src="https://example.com/av.jpg"]');
    expect(avatarImg).toBeInTheDocument();
  });

  it('FE-COMP-NAVBAR-028: user initial shown when no avatar_url', () => {
    seedStore(useAuthStore, {
      user: buildUser({ username: 'testuser', avatar_url: null }),
      isAuthenticated: true,
    });
    render(<Navbar />);
    // The initial is rendered as the first char uppercased in a div
    expect(screen.getAllByText('T')[0]).toBeInTheDocument();
  });

  it('FE-COMP-NAVBAR-029: clicking backdrop overlay closes user menu', async () => {
    const user = userEvent.setup();
    render(<Navbar />);
    await user.click(screen.getByText('testuser'));
    expect(screen.getByText('Settings')).toBeInTheDocument();
    // The backdrop overlay is a fixed-inset div rendered in the portal
    const backdrop = document.querySelector('[style*="inset: 0"]') as HTMLElement;
    if (backdrop) {
      await user.click(backdrop);
      expect(screen.queryByText('Settings')).not.toBeInTheDocument();
    }
  });

  it('FE-COMP-NAVBAR-030: dark mode auto uses system preference', () => {
    // 'auto' dark_mode relies on matchMedia — seed with auto and render
    seedStore(useSettingsStore, { settings: buildSettings({ dark_mode: 'auto' }) });
    render(<Navbar />);
    // Component should render without errors regardless of system preference
    expect(document.querySelector('nav')).toBeInTheDocument();
  });

  it('FE-COMP-NAVBAR-031: dark mode toggle calls updateSetting with light when currently dark', async () => {
    const user = userEvent.setup();
    const updateSetting = vi.fn().mockResolvedValue(undefined);
    seedStore(useSettingsStore, { settings: buildSettings({ dark_mode: 'dark' }), updateSetting });
    render(<Navbar />);
    const toggleBtn = document.querySelector('button[title]') as HTMLElement;
    expect(toggleBtn).toBeTruthy();
    await user.click(toggleBtn);
    expect(updateSetting).toHaveBeenCalledWith('dark_mode', 'light');
  });

  it('FE-COMP-NAVBAR-032: user email shown in open user menu', async () => {
    const user = userEvent.setup();
    seedStore(useAuthStore, {
      user: buildUser({ username: 'testuser', email: 'testuser@example.com' }),
      isAuthenticated: true,
    });
    render(<Navbar />);
    await user.click(screen.getByText('testuser'));
    expect(screen.getByText('testuser@example.com')).toBeInTheDocument();
  });

  it('FE-COMP-NAVBAR-033: administrator badge shown for admin user in open menu', async () => {
    const user = userEvent.setup();
    seedStore(useAuthStore, {
      user: buildUser({ username: 'adminuser', role: 'admin' }),
      isAuthenticated: true,
    });
    render(<Navbar />);
    await user.click(screen.getByText('adminuser'));
    expect(screen.getByText('Administrator')).toBeInTheDocument();
  });
});