import { describe, it, expect, beforeEach, jest } from '@jest/globals';
import { render, screen, fireEvent } from '@testing-library/react';
import '@testing-library/jest-dom';
import { MobileMenu } from './mobile-menu';

jest.mock('@/hooks/use-focus-trap', () => ({
  useFocusTrap: () => ({ current: null }),
}));

jest.mock('@/lib/site-config', () => ({
  useSiteConfig: () => ({
    mainNav: [
      { id: 'products', label: '产品', href: '/products', hasDropdown: true, dropdownKey: 'products' },
      { id: 'solutions', label: '解决方案', href: '/solutions', hasDropdown: true, dropdownKey: 'solutions' },
      { id: 'services', label: '服务', href: '/services' },
      { id: 'about', label: '关于我们', href: '/about' },
      { id: 'contact', label: '联系我们', href: '/contact' },
    ],
    megaDropdown: {
      products: [
        { id: 'erp', title: 'ERP 管理系统', description: '财务·采购·销售·库存·生产', href: '/products/erp' },
      ],
      solutions: [
        { id: 'manufacturing', title: '制造业', description: '智能制造·MES·质量管控', href: '/solutions/manufacturing' },
      ],
    },
  }),
  SiteConfigProvider: ({ children }: { children: React.ReactNode }) => <>{children}</>,
}));

jest.mock('@/lib/constants', () => ({
  NAVIGATION_V2: [
    { id: 'products', label: '产品', href: '/products', hasDropdown: true, dropdownKey: 'products' },
    { id: 'solutions', label: '解决方案', href: '/solutions', hasDropdown: true, dropdownKey: 'solutions' },
    { id: 'services', label: '服务', href: '/services' },
    { id: 'about', label: '关于我们', href: '/about' },
    { id: 'contact', label: '联系我们', href: '/contact' },
  ],
  MEGA_DROPDOWN_DATA: {
    products: [
      { id: 'erp', title: 'ERP 管理系统', description: '财务·采购·销售·库存·生产', href: '/products/erp' },
    ],
    solutions: [
      { id: 'manufacturing', title: '制造业', description: '智能制造·MES·质量管控', href: '/solutions/manufacturing' },
    ],
  },
}));

jest.mock('next/link', () => {
  const MockLink = ({ children, href, ...props }: { children: React.ReactNode; href: string; [key: string]: unknown }) => (
    <a href={href} {...props}>{children}</a>
  );
  MockLink.displayName = 'MockLink';
  return MockLink;
});

jest.mock('framer-motion', () => ({
  AnimatePresence: ({ children }: { children: React.ReactNode }) => <>{children}</>,
  motion: {
    div: ({ children, className, ...props }: { children: React.ReactNode; className?: string; [key: string]: unknown }) => (
      <div className={className} {...props}>{children}</div>
    ),
  },
}));

jest.mock('lucide-react', () => ({
  ChevronDown: () => <span data-testid="chevron-down" />,
  Menu: () => <span data-testid="menu-icon" />,
  X: () => <span data-testid="x-icon" />,
}));

jest.mock('@/components/ui/static-link', () => ({
  StaticLink: ({ children, href, ...props }: { children: React.ReactNode; href: string; [key: string]: unknown }) => (
    <a href={href} {...props}>{children}</a>
  ),
}));

jest.mock('@/lib/utils', () => ({
  cn: (...args: unknown[]) => args.filter(Boolean).join(' '),
}));

describe('MobileMenu', () => {
  beforeEach(() => {
    jest.clearAllMocks();
  });

  describe('Rendering', () => {
    it('should render menu button', () => {
      render(<MobileMenu />);
      expect(screen.getByRole('button', { name: '打开菜单' })).toBeInTheDocument();
    });

    it('should render menu icon when closed', () => {
      render(<MobileMenu />);
      const button = screen.getByRole('button');
      expect(button).toBeInTheDocument();
    });

    it('should not render menu panel when closed', () => {
      render(<MobileMenu />);
      expect(screen.queryByRole('navigation')).not.toBeInTheDocument();
    });
  });

  describe('Opening Menu', () => {
    it('should open menu when button clicked', () => {
      render(<MobileMenu />);
      const button = screen.getByRole('button', { name: '打开菜单' });
      fireEvent.click(button);
      
      expect(screen.getByRole('navigation')).toBeInTheDocument();
    });

    it('should change button label when open', () => {
      render(<MobileMenu />);
      const button = screen.getByRole('button', { name: '打开菜单' });
      fireEvent.click(button);
      
      expect(screen.getByRole('button', { name: '关闭菜单' })).toBeInTheDocument();
    });

    it('should render navigation items', () => {
      render(<MobileMenu />);
      const button = screen.getByRole('button', { name: '打开菜单' });
      fireEvent.click(button);
      
      expect(screen.getByText('产品')).toBeInTheDocument();
      expect(screen.getByText('服务')).toBeInTheDocument();
    });
  });

  describe('Closing Menu', () => {
    it('should close menu when button clicked again', () => {
      render(<MobileMenu />);
      const button = screen.getByRole('button', { name: '打开菜单' });
      fireEvent.click(button);
      
      const closeButton = screen.getByRole('button', { name: '关闭菜单' });
      fireEvent.click(closeButton);
      
      expect(screen.queryByRole('navigation')).not.toBeInTheDocument();
    });

    it('should close menu when overlay clicked', () => {
      render(<MobileMenu />);
      const button = screen.getByRole('button', { name: '打开菜单' });
      fireEvent.click(button);
      
      const overlay = document.querySelector('.fixed.inset-0');
      if (overlay) {
        fireEvent.click(overlay);
      }
      
      expect(screen.queryByRole('navigation')).not.toBeInTheDocument();
    });
  });

  describe('Keyboard Navigation', () => {
    it('should open menu with Enter key', () => {
      render(<MobileMenu />);
      const button = screen.getByRole('button', { name: '打开菜单' });
      fireEvent.click(button);
      
      expect(screen.getByRole('navigation')).toBeInTheDocument();
    });

    it('should open menu with Space key', () => {
      render(<MobileMenu />);
      const button = screen.getByRole('button', { name: '打开菜单' });
      fireEvent.click(button);
      
      expect(screen.getByRole('navigation')).toBeInTheDocument();
    });

    it('should close menu with Escape key', () => {
      render(<MobileMenu />);
      const button = screen.getByRole('button', { name: '打开菜单' });
      fireEvent.click(button);
      
      fireEvent.keyDown(button, { key: 'Escape' });
      
      expect(screen.queryByRole('navigation')).not.toBeInTheDocument();
    });
  });

  describe('Accessibility', () => {
    it('should have aria-expanded attribute', () => {
      render(<MobileMenu />);
      const button = screen.getByRole('button');
      expect(button).toHaveAttribute('aria-expanded', 'false');
    });

    it('should update aria-expanded when open', () => {
      render(<MobileMenu />);
      const button = screen.getByRole('button', { name: '打开菜单' });
      fireEvent.click(button);
      
      expect(button).toHaveAttribute('aria-expanded', 'true');
    });

    it('should have aria-controls attribute', () => {
      render(<MobileMenu />);
      const button = screen.getByRole('button');
      expect(button).toHaveAttribute('aria-controls', 'mobile-menu-panel');
    });

    it('should have navigation role', () => {
      render(<MobileMenu />);
      const button = screen.getByRole('button', { name: '打开菜单' });
      fireEvent.click(button);
      
      const nav = screen.getByRole('navigation');
      expect(nav).toHaveAttribute('aria-label', '移动端导航');
    });
  });

  describe('Styling', () => {
    it('should have responsive visibility', () => {
      const { container } = render(<MobileMenu />);
      const wrapper = container.firstChild as HTMLElement;
      expect(wrapper).toHaveClass('lg:hidden');
    });

    it('should apply custom className', () => {
      const { container } = render(<MobileMenu className="custom-class" />);
      const wrapper = container.firstChild as HTMLElement;
      expect(wrapper).toHaveClass('custom-class');
    });
  });
});