/**
 * Base URL for API requests.
 * In development, point to the Go backend directly (e.g., http://localhost:8080).
 * In production, use the relative /api path so nginx proxies to the backend.
 */
const API_BASE = import.meta.env.VITE_API_BASE_URL || '/api';

/**
 * Wrapper around fetch for calling the backend API.
 *
 * @param {string} path - API path, e.g., `/users` or `/objects/123`.
 * @param {RequestInit} [options={}] - fetch options.
 * @returns {Promise<any>} Parsed JSON response.
 * @throws {Error} On non-OK responses.
 */
export async function apiFetch(path, options = {}) {
	const url = `${API_BASE}${path}`;

	const config = {
		...options,
		headers: {
			'Content-Type': 'application/json',
			...options.headers
		}
	};

	if (config.body && typeof config.body === 'object' && !(config.body instanceof FormData)) {
		config.body = JSON.stringify(config.body);
	}

	const response = await fetch(url, config);

	if (!response.ok) {
		const text = await response.text();
		throw new Error(text || `HTTP ${response.status}`);
	}

	return response.json();
}