import { render, screen } from '@testing-library/react';
import { Breadcrumbs } from '../Breadcrumbs';
import { usePathname } from 'next/navigation';

// Mock Next.js navigation
jest.mock('next/navigation', () => ({
  usePathname: jest.fn(),
}));

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

  it('does not render on login page', () => {
    (usePathname as jest.Mock).mockReturnValue('/login');
    const { container } = render(<Breadcrumbs />);
    expect(container.firstChild).toBeNull();
  });

  it('does not render on verify-otp page', () => {
    (usePathname as jest.Mock).mockReturnValue('/verify-otp');
    const { container } = render(<Breadcrumbs />);
    expect(container.firstChild).toBeNull();
  });

  it('renders home icon link', () => {
    (usePathname as jest.Mock).mockReturnValue('/dashboard');
    render(<Breadcrumbs />);

    const homeLink = screen.getByLabelText('Home');
    expect(homeLink).toHaveAttribute('href', '/dashboard');
  });

  it('renders single breadcrumb for dashboard', () => {
    (usePathname as jest.Mock).mockReturnValue('/dashboard');
    render(<Breadcrumbs />);

    expect(screen.getByText('Dashboard')).toBeInTheDocument();
    expect(screen.getByText('Dashboard')).toHaveAttribute('aria-current', 'page');
  });

  it('renders breadcrumbs for nested route', () => {
    (usePathname as jest.Mock).mockReturnValue('/beneficiaries/123');
    render(<Breadcrumbs />);

    expect(screen.getByText('Loved Ones')).toBeInTheDocument();
    expect(screen.getByText('#123')).toBeInTheDocument();
  });

  it('renders breadcrumbs for deep nested route', () => {
    (usePathname as jest.Mock).mockReturnValue('/beneficiaries/123/sensors');
    render(<Breadcrumbs />);

    expect(screen.getByText('Loved Ones')).toBeInTheDocument();
    expect(screen.getByText('#123')).toBeInTheDocument();
    expect(screen.getByText('Sensors')).toBeInTheDocument();
  });

  it('renders proper mapped labels', () => {
    (usePathname as jest.Mock).mockReturnValue('/beneficiaries/123/subscription');
    render(<Breadcrumbs />);

    expect(screen.getByText('Loved Ones')).toBeInTheDocument();
    expect(screen.getByText('Subscription')).toBeInTheDocument();
  });

  it('capitalizes unknown segments', () => {
    (usePathname as jest.Mock).mockReturnValue('/unknown-route');
    render(<Breadcrumbs />);

    expect(screen.getByText('Unknown-route')).toBeInTheDocument();
  });

  it('marks last item as current page', () => {
    (usePathname as jest.Mock).mockReturnValue('/beneficiaries/123/sensors');
    render(<Breadcrumbs />);

    const currentPage = screen.getByText('Sensors');
    expect(currentPage).toHaveAttribute('aria-current', 'page');
  });

  it('makes intermediate items clickable', () => {
    (usePathname as jest.Mock).mockReturnValue('/beneficiaries/123/sensors');
    render(<Breadcrumbs />);

    const lovedOnesLink = screen.getByText('Loved Ones').closest('a');
    expect(lovedOnesLink).toHaveAttribute('href', '/beneficiaries');

    const idLink = screen.getByText('#123').closest('a');
    expect(idLink).toHaveAttribute('href', '/beneficiaries/123');
  });

  it('handles settings route', () => {
    (usePathname as jest.Mock).mockReturnValue('/settings');
    render(<Breadcrumbs />);

    expect(screen.getByText('Settings')).toBeInTheDocument();
  });

  it('handles profile route', () => {
    (usePathname as jest.Mock).mockReturnValue('/profile');
    render(<Breadcrumbs />);

    expect(screen.getByText('Profile')).toBeInTheDocument();
  });
});