import { describe, it, expect, jest, beforeEach, afterEach } from '@jest/globals';
import { render, screen, fireEvent, waitFor } from '@testing-library/react';
import '@testing-library/jest-dom';

const mockPush = jest.fn();
const mockReplace = jest.fn();

jest.mock('next/navigation', () => ({
  usePathname: jest.fn(() => '/'),
  useSearchParams: jest.fn(() => new URLSearchParams()),
  useRouter: jest.fn(() => ({
    push: mockPush,
    replace: mockReplace,
  })),
}));

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

jest.mock('next/image', () => {
  const MockImage = ({ src, alt, width, height, className, ...props }: { src: string; alt: string; width: number; height: number; className?: string; [key: string]: unknown }) => (
    <img src={src} alt={alt} width={width} height={height} className={className} {...props} />
  );
  MockImage.displayName = 'MockImage';
  return MockImage;
});

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

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

jest.mock('@/components/ui/button', () => {
  const MockButton = ({ children, className, ...props }: { children: React.ReactNode; className?: string; [key: string]: unknown }) => (
    <button className={className} {...props}>
      {children}
    </button>
  );
  MockButton.displayName = 'MockButton';
  return { Button: MockButton };
});

jest.mock('@/lib/site-config', () => ({
  useSiteConfig: () => ({
    name: '四川睿新致远科技有限公司',
    shortName: '睿新致遠',
    displayName: '睿新致远',
    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' },
        { id: 'crm', title: 'CRM 客户管理', description: '线索·商机·合同·服务', href: '/products/crm' },
      ],
      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', () => ({
  COMPANY_INFO: {
    name: '四川睿新致远科技有限公司',
    shortName: '睿新致遠',
    displayName: '睿新致远',
  },
  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' },
      { id: 'crm', title: 'CRM 客户管理', description: '线索·商机·合同·服务', href: '/products/crm' },
    ],
    solutions: [
      { id: 'manufacturing', title: '制造业', description: '智能制造·MES·质量管控', href: '/solutions/manufacturing' },
    ],
  },
}));

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

jest.mock('@/components/layout/mega-dropdown', () => ({
  MegaDropdown: ({ label, groups }: { label: string; groups?: Array<{ id: string; title: string; description: string; href: string }> }) => (
    <div data-testid="mega-dropdown">
      <span>{label}</span>
      {(groups ?? []).map(item => (
        <a key={item.id} href={item.href}>{item.title}</a>
      ))}
    </div>
  ),
}));

import { Header } from './header';

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

  afterEach(() => {
    jest.clearAllMocks();
  });

  describe('Rendering', () => {
    it('should render header component', () => {
      render(<Header />);
      expect(screen.getByRole('banner')).toBeInTheDocument();
    });

    it('should render logo', () => {
      render(<Header />);
      const logo = screen.getByAltText('四川睿新致远科技有限公司');
      expect(logo).toBeInTheDocument();
    });

    it('should render desktop navigation', () => {
      render(<Header />);
      expect(screen.getByTestId('desktop-navigation')).toBeInTheDocument();
    });

    it('should render navigation items', () => {
      render(<Header />);
      expect(screen.getByText('产品')).toBeInTheDocument();
      expect(screen.getByText('解决方案')).toBeInTheDocument();
      expect(screen.getByText('服务')).toBeInTheDocument();
      expect(screen.getByText('关于我们')).toBeInTheDocument();
      expect(screen.getByText('联系我们')).toBeInTheDocument();
    });

    it('should render consult button', () => {
      render(<Header />);
      expect(screen.getByTestId('consult-button')).toBeInTheDocument();
    });

    it('should render mobile menu button', () => {
      render(<Header />);
      expect(screen.getByTestId('mobile-menu-button')).toBeInTheDocument();
    });
  });

  describe('Mobile Menu', () => {
    it('should toggle mobile menu on button click', async () => {
      render(<Header />);
      const menuButton = screen.getByTestId('mobile-menu-button');
      
      expect(screen.queryByTestId('mobile-navigation')).not.toBeInTheDocument();
      
      fireEvent.click(menuButton);
      
      await waitFor(() => {
        expect(screen.getByTestId('mobile-navigation')).toBeInTheDocument();
      });
      
      fireEvent.click(menuButton);
      
      await waitFor(() => {
        expect(screen.queryByTestId('mobile-navigation')).not.toBeInTheDocument();
      });
    });

    it('should show X icon when menu is open', async () => {
      render(<Header />);
      const menuButton = screen.getByTestId('mobile-menu-button');
      
      fireEvent.click(menuButton);
      
      await waitFor(() => {
        expect(screen.getByTestId('x-icon')).toBeInTheDocument();
      });
    });

    it('should show Menu icon when menu is closed', () => {
      render(<Header />);
      expect(screen.getByTestId('menu-icon')).toBeInTheDocument();
    });
  });

  describe('Accessibility', () => {
    it('should have proper ARIA attributes on menu button', () => {
      render(<Header />);
      const menuButton = screen.getByTestId('mobile-menu-button');
      
      expect(menuButton).toHaveAttribute('aria-expanded', 'false');
      expect(menuButton).toHaveAttribute('aria-controls', 'mobile-menu');
      expect(menuButton).toHaveAttribute('aria-label', '打开菜单');
    });

    it('should update aria-expanded when menu is toggled', async () => {
      render(<Header />);
      const menuButton = screen.getByTestId('mobile-menu-button');
      
      fireEvent.click(menuButton);
      
      await waitFor(() => {
        expect(menuButton).toHaveAttribute('aria-expanded', 'true');
        expect(menuButton).toHaveAttribute('aria-label', '关闭菜单');
      });
    });

    it('should not double-toggle menu on Enter or Space keydown', () => {
      render(<Header />);
      const menuButton = screen.getByTestId('mobile-menu-button');

      // Enter/Space 由原生 button 的 click 处理，keydown 不应再次 toggle
      fireEvent.keyDown(menuButton, { key: 'Enter' });
      expect(screen.queryByTestId('mobile-navigation')).not.toBeInTheDocument();

      fireEvent.keyDown(menuButton, { key: ' ' });
      expect(screen.queryByTestId('mobile-navigation')).not.toBeInTheDocument();
    });

    it('should have proper navigation role', () => {
      render(<Header />);
      const nav = screen.getByTestId('desktop-navigation');
      expect(nav).toHaveAttribute('role', 'navigation');
    });
  });

  describe('Navigation', () => {
    it('should have correct href for navigation items', () => {
      render(<Header />);
      const contactLink = screen.getByText('联系我们').closest('a');
      const serviceLink = screen.getByText('服务').closest('a');
      
      expect(contactLink).toHaveAttribute('href', '/contact');
      expect(serviceLink).toHaveAttribute('href', '/services');
    });
  });
});