// The frontend->backend address is deliberately NOT a backend-stored setting
// (see project-structure.md "Frontend → backend address"). It's read here from:
//   1. a deploy-time env var (VITE_BACKEND_URL), or
//   2. a value saved in the browser via the connection setup screen, or
//   3. a localhost fallback for local dev against the mock backend.

const STORAGE_KEY = 'homefeed:backendUrl';
const DEFAULT_URL = 'http://localhost:4000';

export function getBackendUrl(): string {
	if (typeof localStorage !== 'undefined') {
		const stored = localStorage.getItem(STORAGE_KEY);
		if (stored) return stored;
	}
	return import.meta.env.VITE_BACKEND_URL || DEFAULT_URL;
}

export function setBackendUrl(url: string) {
	if (typeof localStorage !== 'undefined') {
		localStorage.setItem(STORAGE_KEY, url);
	}
}