/**
 * Shared API helpers for ChronoMind web clients.
 *
 * Provides a common fetch wrapper with auth token injection.
 */

import { getBackendBaseURL } from './product-config';

export function getAccessToken(): string | null {
  if (typeof window === 'undefined') return null;
  return localStorage.getItem('chronomind_access_token');
}

export async function apiFetch<T>(path: string, opts?: RequestInit): Promise<T> {
  const token = getAccessToken();
  const res = await fetch(`${getBackendBaseURL()}${path}`, {
    ...opts,
    headers: {
      'Content-Type': 'application/json',
      ...(token ? { Authorization: `Bearer ${token}` } : {}),
      ...(opts?.headers ?? {}),
    },
  });
  if (!res.ok) {
    const body = await res.text().catch(() => '');
    throw new Error(`${res.status}: ${body}`);
  }
  return res.json() as Promise<T>;
}