import { useMutation, useQuery, useQueryClient } from '@tanstack/react-query'
import { apiFetch, apiPost } from '../lib/api'
import type { SessionResponse } from '../types'

export function useSession() {
  return useQuery({
    queryKey: ['session'],
    queryFn: () => apiFetch<SessionResponse>('/api/v1/session'),
    staleTime: 60_000,
  })
}

export function useLogout() {
  const queryClient = useQueryClient()
  return useMutation({
    mutationFn: () => apiPost('/api/v1/auth/logout'),
    // Full reload rather than just invalidating the session query — clears
    // any in-memory query cache holding data from the now-logged-out user,
    // and re-runs App.tsx's session check from a clean slate.
    onSuccess: () => {
      queryClient.clear()
      window.location.assign('/')
    },
  })
}