import React from 'react'
import { renderWithProviders, userEvent, screen } from '@/__tests__/utils/test-helpers'
import { useAuth } from '@/hooks/use-auth'
import Navbar from './navbar'

jest.mock('@/hooks/use-auth')
jest.mock('@/components/ui/button', () => ({
  Button: ({ children, ...props }: any) => <button {...props}>{children}</button>,
}))
jest.mock('lucide-react', () => ({
  Menu: () => <span data-testid="menu-icon" />,
  X: () => <span data-testid="close-icon" />,
  LogOut: () => <span data-testid="logout-icon" />,
}))
jest.mock('next/link', () => ({
  __esModule: true,
  default: ({ children, href }: any) => <a href={href}>{children}</a>,
}))

describe('Navbar Component', () => {
  const mockLogout = jest.fn()

  beforeEach(() => {
    jest.clearAllMocks()
  })

  describe('Unauthenticated State', () => {
    beforeEach(() => {
      ;(useAuth as jest.Mock).mockReturnValue({
        user: null,
        logout: mockLogout,
      })
    })

    it('should render navbar with logo', () => {
      renderWithProviders(<Navbar />)
      expect(screen.getByText('Portfolio Host')).toBeInTheDocument()
    })

    it('should display login and signup buttons when not authenticated', () => {
      renderWithProviders(<Navbar />)
      expect(screen.getByRole('link', { name: /login/i })).toBeInTheDocument()
      expect(screen.getByRole('link', { name: /sign up/i })).toBeInTheDocument()
    })

    it('should display home link', () => {
      renderWithProviders(<Navbar />)
      const homeLinks = screen.getAllByText('Home')
      expect(homeLinks.length).toBeGreaterThan(0)
    })

    it('should have mobile menu button', () => {
      renderWithProviders(<Navbar />)
      const menuButton = screen.getByRole('button', { name: /toggle menu/i })
      expect(menuButton).toBeInTheDocument()
    })
  })

  describe('Authenticated State', () => {
    const mockUser = { id: 1, name: 'John Doe', email: 'john@example.com', created_at: '', updated_at: '' }

    beforeEach(() => {
      ;(useAuth as jest.Mock).mockReturnValue({
        user: mockUser,
        logout: mockLogout,
      })
    })

    it('should display logout button when authenticated', () => {
      renderWithProviders(<Navbar />)
      expect(screen.getByRole('button', { name: /logout/i })).toBeInTheDocument()
    })

    it('should display dashboard link when authenticated', () => {
      renderWithProviders(<Navbar />)
      expect(screen.getByText('Dashboard')).toBeInTheDocument()
    })

    it('should not display login or signup buttons when authenticated', () => {
      renderWithProviders(<Navbar />)
      const loginLinks = screen.queryAllByText(/login/i)
      const signupLinks = screen.queryAllByText(/sign up/i)
      // May exist in mobile menu but not visible in desktop
      expect(loginLinks.length + signupLinks.length).toBeLessThanOrEqual(0)
    })

    it('should call logout when logout button clicked', async () => {
      mockLogout.mockResolvedValueOnce(undefined)
      renderWithProviders(<Navbar />)

      const logoutButton = screen.getByRole('button', { name: /logout/i })
      await userEvent.click(logoutButton)

      expect(mockLogout).toHaveBeenCalled()
    })
  })

  describe('Mobile Menu', () => {
    beforeEach(() => {
      ;(useAuth as jest.Mock).mockReturnValue({
        user: null,
        logout: mockLogout,
      })
    })

    it('should show mobile menu toggle button', () => {
      renderWithProviders(<Navbar />)
      const menuButton = screen.getByRole('button', { name: /toggle menu/i })
      expect(menuButton).toHaveAttribute('aria-label', 'Toggle menu')
    })

    it('should open mobile menu when toggle button clicked', async () => {
      renderWithProviders(<Navbar />)
      const menuButton = screen.getByRole('button', { name: /toggle menu/i })

      expect(menuButton).toHaveAttribute('aria-expanded', 'false')

      await userEvent.click(menuButton)

      expect(menuButton).toHaveAttribute('aria-expanded', 'true')
    })

    it('should close mobile menu when toggle button clicked again', async () => {
      renderWithProviders(<Navbar />)
      const menuButton = screen.getByRole('button', { name: /toggle menu/i })

      await userEvent.click(menuButton)
      expect(menuButton).toHaveAttribute('aria-expanded', 'true')

      await userEvent.click(menuButton)
      expect(menuButton).toHaveAttribute('aria-expanded', 'false')
    })

    it('should display mobile menu items when open', async () => {
      renderWithProviders(<Navbar />)
      const menuButton = screen.getByRole('button', { name: /toggle menu/i })

      await userEvent.click(menuButton)

      // Mobile menu should show login and signup
      const links = screen.getAllByRole('link')
      expect(links.length).toBeGreaterThan(0)
    })

    it('should close mobile menu when link clicked', async () => {
      renderWithProviders(<Navbar />)
      const menuButton = screen.getByRole('button', { name: /toggle menu/i })

      await userEvent.click(menuButton)
      expect(menuButton).toHaveAttribute('aria-expanded', 'true')

      const homeLink = screen.getAllByText('Home')[0]
      await userEvent.click(homeLink)

      expect(menuButton).toHaveAttribute('aria-expanded', 'false')
    })

    it('should show mobile menu with authenticated user', async () => {
      const mockUser = { id: 1, name: 'John Doe', email: 'john@example.com', created_at: '', updated_at: '' }
      ;(useAuth as jest.Mock).mockReturnValue({
        user: mockUser,
        logout: mockLogout,
      })

      renderWithProviders(<Navbar />)
      const menuButton = screen.getByRole('button', { name: /toggle menu/i })

      await userEvent.click(menuButton)

      expect(screen.getByText('Dashboard')).toBeInTheDocument()
      expect(screen.getByRole('button', { name: /logout/i })).toBeInTheDocument()
    })
  })

  describe('Keyboard Navigation', () => {
    beforeEach(() => {
      ;(useAuth as jest.Mock).mockReturnValue({
        user: null,
        logout: mockLogout,
      })
    })

    it('should have accessible navbar links', () => {
      renderWithProviders(<Navbar />)

      const homeLinks = screen.getAllByText('Home')
      expect(homeLinks[0].closest('a')).toHaveAttribute('href', '/')

      const loginLinks = screen.getAllByText(/login/i)
      expect(loginLinks[0].closest('a')).toHaveAttribute('href', '/login')

      const signupLinks = screen.getAllByText(/sign up/i)
      expect(signupLinks[0].closest('a')).toHaveAttribute('href', '/register')
    })

    it('should have aria labels for interactive elements', () => {
      renderWithProviders(<Navbar />)

      const menuButton = screen.getByRole('button', { name: /toggle menu/i })
      expect(menuButton).toHaveAttribute('aria-label')
    })
  })

  describe('Logo Navigation', () => {
    beforeEach(() => {
      ;(useAuth as jest.Mock).mockReturnValue({
        user: null,
        logout: mockLogout,
      })
    })

    it('should have logo that links to home', () => {
      renderWithProviders(<Navbar />)
      const logoLink = screen.getByText('Portfolio Host').closest('a')
      expect(logoLink).toHaveAttribute('href', '/')
    })

    it('should have accessible logo link', () => {
      renderWithProviders(<Navbar />)
      const logoLink = screen.getByText('Portfolio Host').closest('a')
      expect(logoLink).toBeInTheDocument()
    })
  })
})
