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

jest.mock('next/navigation', () => ({
  usePathname: () => '/',
  useSearchParams: () => new URLSearchParams(),
}));

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

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

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

  describe('Rendering', () => {
    it('should render tab bar', () => {
      render(<MobileTabBar />);
      const nav = screen.getByRole('navigation');
      expect(nav).toBeInTheDocument();
    });

    it('should render all tabs', () => {
      render(<MobileTabBar />);
      expect(screen.getByText('首页')).toBeInTheDocument();
      expect(screen.getByText('服务')).toBeInTheDocument();
      expect(screen.getByText('产品')).toBeInTheDocument();
      expect(screen.getByText('关于')).toBeInTheDocument();
      expect(screen.getByText('联系')).toBeInTheDocument();
    });

    it('should render tab icons', () => {
      render(<MobileTabBar />);
      const icons = document.querySelectorAll('svg');
      expect(icons.length).toBeGreaterThan(0);
    });
  });

  describe('Active State', () => {
    it('should highlight active tab', () => {
      render(<MobileTabBar />);
      const homeTab = screen.getByText('首页').closest('a');
      expect(homeTab).toBeInTheDocument();
    });

    it('should show active indicator', () => {
      render(<MobileTabBar />);
      const activeIndicator = document.querySelector('.bg-\\[var\\(--color-brand-primary\\)\\]');
      expect(activeIndicator).toBeInTheDocument();
    });
  });

  describe('Navigation Links', () => {
    it('should have correct href for home', () => {
      render(<MobileTabBar />);
      const homeLink = screen.getByText('首页').closest('a');
      expect(homeLink).toHaveAttribute('href', '/');
    });

    it('should have correct href for services', () => {
      render(<MobileTabBar />);
      const servicesLink = screen.getByText('服务').closest('a');
      expect(servicesLink).toHaveAttribute('href', '/services');
    });

    it('should have correct href for products', () => {
      render(<MobileTabBar />);
      const productsLink = screen.getByText('产品').closest('a');
      expect(productsLink).toHaveAttribute('href', '/products');
    });

    it('should have correct href for about', () => {
      render(<MobileTabBar />);
      const aboutLink = screen.getByText('关于').closest('a');
      expect(aboutLink).toHaveAttribute('href', '/about');
    });

    it('should have correct href for contact', () => {
      render(<MobileTabBar />);
      const contactLink = screen.getByText('联系').closest('a');
      expect(contactLink).toHaveAttribute('href', '/contact');
    });
  });

  describe('Accessibility', () => {
    it('should have navigation role', () => {
      render(<MobileTabBar />);
      const nav = screen.getByRole('navigation');
      expect(nav).toBeInTheDocument();
    });

    it('should have accessible tab labels', () => {
      render(<MobileTabBar />);
      const tabs = screen.getAllByRole('link');
      expect(tabs.length).toBe(5);
    });
  });

  describe('Styling', () => {
    it('should have fixed positioning', () => {
      render(<MobileTabBar />);
      const nav = screen.getByRole('navigation');
      expect(nav).toHaveClass('fixed');
      expect(nav).toHaveClass('bottom-0');
    });

    it('should have responsive visibility', () => {
      render(<MobileTabBar />);
      const nav = screen.getByRole('navigation');
      expect(nav).toHaveClass('md:hidden');
    });

    it('should have backdrop blur', () => {
      render(<MobileTabBar />);
      const nav = screen.getByRole('navigation');
      expect(nav).toHaveClass('backdrop-blur-xl');
    });

    it('should have proper height', () => {
      render(<MobileTabBar />);
      const nav = screen.getByRole('navigation');
      const heightDiv = nav.querySelector('.h-16');
      expect(heightDiv).toBeInTheDocument();
    });
  });
});