'use client';

import { useSession } from 'next-auth/react';
import useSWR from 'swr';
import { apiClient } from '@/services/api-client';
import type { UserResponse } from '@meshitrack/shared';

/**
 * Provides authentication state and user profile (including householdIds).
 *
 * The access token comes from the NextAuth session (Keycloak JWT).
 * Household membership is fetched from the API (`GET /users/me`) via SWR
 * so it is always fresh -- no stale JWT claims.
 */
export function useApi() {
  const { data: session, status } = useSession();

  // Set API client token synchronously so SWR fetches have credentials.
  if (session?.accessToken) {
    apiClient.accessToken = session.accessToken;
  }

  const shouldFetch = status === 'authenticated' && apiClient.hasToken;

  const {
    data: profile,
    mutate: refreshProfile,
    isLoading: profileLoading,
  } = useSWR<UserResponse>(shouldFetch ? 'user-profile' : null, () =>
    apiClient.get<UserResponse>('/users/me'),
  );

  return {
    householdId: profile?.householdIds?.[0] ?? null,
    householdIds: profile?.householdIds ?? [],
    isLoading: status === 'loading' || (shouldFetch && profileLoading),
    isAuthenticated: status === 'authenticated',
    profile: profile ?? null,
    refreshProfile,
  };
}