export const useAuth = () => {
  const tokenCookie = useCookie('token')
  const authMessageCookie = useCookie('authMessage')
  const router = useRouter()
  const config = useRuntimeConfig()
  
  const isLoggedIn = () => {
    if (!import.meta.client) return false
    const token = localStorage.getItem('token')
    const tenantId = localStorage.getItem('tenantId')
    return !!(token && tenantId)
  }

  const logout = async () => {
    if (import.meta.client) {
      // Call backend logout endpoint
      try {
        const token = localStorage.getItem('token')
        const tenantId = localStorage.getItem('tenantId')
        
        if (token) {
          await fetch(`${config.public.apiBaseUrl}/api/auth/logout`, {
            method: 'POST',
            headers: {
              'Authorization': `Bearer ${token}`,
              ...(tenantId && { 'x-tenant-id': tenantId }),
            },
          })
        }
      } catch (error) {
        console.error('Logout error:', error)
      }
      
      // Clear local storage
      localStorage.removeItem('token')
      localStorage.removeItem('tenantId')
      localStorage.removeItem('user')
      
      // Clear cookie for server-side check
      tokenCookie.value = null
      
      // Set flash message for login page
      authMessageCookie.value = 'Logged out successfully'
      
      // Redirect to login page
      router.push('/login')
    }
  }

  const getUser = () => {
    if (!import.meta.client) return null
    const userStr = localStorage.getItem('user')
    return userStr ? JSON.parse(userStr) : null
  }

  return {
    isLoggedIn,
    logout,
    getUser,
  }
}