import { redirect } from 'next/navigation';

const API_BASE =
  process.env.NEXT_PUBLIC_API_URL_INTERNAL || 'http://recipe-api:8080';

export async function fetchJson<T>(path: string, init?: RequestInit): Promise<T> {
  // Använd alltid relativ path i webbläsaren för att undvika mixed content
  const isServer = typeof window === 'undefined';
  const url = isServer
    ? (path.startsWith('http') ? path : `${API_BASE}${path}`)
    : path;

  // Dynamisk import så att auth-headers inte bundlas till klienten
  const authHeaders = isServer
    ? await (await import('./auth-headers')).getAuthHeaders()
    : {};

  const res = await fetch(url, {
    ...init,
    cache: 'no-store',
    headers: {
      'Content-Type': 'application/json',
      ...authHeaders,
      ...(init?.headers || {}),
    },
  });

  if (!res.ok) {
    if (res.status === 401 && isServer) {
      redirect('/login');
    }
    const text = await res.text();
    throw new Error(`API ${res.status}: ${text}`);
  }

  return res.json();
}

export { API_BASE };