/**
 * API configuration for ir-studio.
 * Supports configurable VITE_API_URL for production deployments where frontend
 * and backend are hosted on separate domains or subpaths.
 */

// If VITE_API_URL is provided (e.g. "https://api.ir-studio.org" or "http://backend:8000"),
// use it without trailing slash. Otherwise default to "" for same-origin relative URLs.
const rawApiUrl = (import.meta.env.VITE_API_URL as string | undefined)?.trim() || '';
export const API_BASE_URL = rawApiUrl.replace(/\/+$/, '');

/**
 * Returns a fully qualified or relative URL for a given API endpoint.
 *
 * Example:
 * apiUrl('/api/health') => "/api/health" (default) or "https://api.my-domain.com/api/health"
 */
export function apiUrl(endpoint: string): string {
  const cleanEndpoint = endpoint.startsWith('/') ? endpoint : `/${endpoint}`;
  return `${API_BASE_URL}${cleanEndpoint}`;
}