import { render, screen } from '@testing-library/react';
import userEvent from '@testing-library/user-event';
import type { NavItem } from '../model/types';
import { MobileNav } from './MobileNav';

vi.mock('next/navigation', () => ({ usePathname: vi.fn(() => '/') }));

const ITEMS: NavItem[] = [
  { id: 'intro', label: 'Intro', number: '01' },
  { id: 'bio', label: 'Bio', number: '02' },
];

describe('MobileNav', () => {
  describe('rendering', () => {
    it('renders title "allmy.work"', () => {
      render(<MobileNav items={ITEMS} />);
      expect(screen.getByText('allmy.work')).toBeInTheDocument();
    });

    it('renders toggle button with text "Menu" initially', () => {
      render(<MobileNav items={ITEMS} />);
      expect(screen.getByRole('button', { name: 'Menu' })).toBeInTheDocument();
    });

    it('menu items are hidden initially', () => {
      render(<MobileNav items={ITEMS} />);
      expect(screen.queryByRole('link', { name: /intro/i })).not.toBeInTheDocument();
    });
  });

  describe('navigation items', () => {
    it('shows items as links with correct hrefs when open', async () => {
      render(<MobileNav items={ITEMS} />);
      await userEvent.click(screen.getByRole('button', { name: 'Menu' }));
      expect(screen.getByRole('link', { name: /01.*Intro/i })).toHaveAttribute('href', '/intro');
      expect(screen.getByRole('link', { name: /02.*Bio/i })).toHaveAttribute('href', '/bio');
    });
  });

  describe('interactions', () => {
    it('click toggle shows links and changes label to "Close"', async () => {
      render(<MobileNav items={ITEMS} />);
      await userEvent.click(screen.getByRole('button', { name: 'Menu' }));
      expect(screen.getByRole('button', { name: 'Close' })).toBeInTheDocument();
      expect(screen.getByText('Intro')).toBeInTheDocument();
    });

    it('closes menu when pathname changes', async () => {
      const { usePathname } = await import('next/navigation');
      vi.mocked(usePathname).mockReturnValue('/');
      const { rerender } = render(<MobileNav items={ITEMS} />);
      await userEvent.click(screen.getByRole('button', { name: 'Menu' }));
      expect(screen.getByRole('button', { name: 'Close' })).toBeInTheDocument();

      vi.mocked(usePathname).mockReturnValue('/bio');
      rerender(<MobileNav items={ITEMS} />);

      expect(screen.getByRole('button', { name: 'Menu' })).toBeInTheDocument();
      expect(screen.queryByRole('button', { name: 'Close' })).not.toBeInTheDocument();
    });
  });
});
