const API_BASE = (import.meta.env.VITE_API_BASE_URL ?? '') + '/api';

async function request(path, options = {}) {
  const hasBody = options.body !== undefined;
  const res = await fetch(`${API_BASE}${path}`, {
    credentials: 'include',
    headers: {
      ...(hasBody ? { 'Content-Type': 'application/json' } : {}),
      ...(options.headers ?? {}),
    },
    ...options,
  });
  if (!res.ok) {
    const err = await res.json().catch(() => ({ error: 'Unknown error' }));
    throw new Error(err.error || `HTTP ${res.status}`);
  }
  return res.json();
}

export const api = {
  // Cars
  getCars: () => request('/cars'),
  createCar: (data) => request('/cars', { method: 'POST', body: JSON.stringify(data) }),
  updateCar: (id, data) => request(`/cars/${id}`, { method: 'PUT', body: JSON.stringify(data) }),
  deleteCar: (id) => request(`/cars/${id}`, { method: 'DELETE' }),
  reorderCars: (ids) => request('/cars/reorder', { method: 'PUT', body: JSON.stringify({ ids }) }),

  // Reservations
  getReservations: () => request('/reservations'),
  createReservation: (data) => request('/reservations', { method: 'POST', body: JSON.stringify(data) }),
  updateReservation: (id, data) => request(`/reservations/${id}`, { method: 'PUT', body: JSON.stringify(data) }),
  deleteReservation: (id) => request(`/reservations/${id}`, { method: 'DELETE' }),
};