function publicWebBase(): string {
  const fromEnv =
    (typeof import.meta.env.VITE_PUBLIC_WEB_BASE === "string" && import.meta.env.VITE_PUBLIC_WEB_BASE.trim()) ||
    (typeof import.meta.env.VITE_EVENTBUZZ_PUBLIC_URL === "string" && import.meta.env.VITE_EVENTBUZZ_PUBLIC_URL.trim());
  if (fromEnv) return fromEnv.replace(/\/+$/, "");

  // Dashboard (5173) is not the public web app; avoid using its origin for microsite links.
  if (import.meta.env.DEV) return "http://localhost:5175";

  return (typeof window !== "undefined" ? window.location.origin : "").replace(/\/+$/, "");
}

export function micrositePublicPageUrl(folder: string): string | null {
  const base = (import.meta.env.VITE_MICROSITE_PUBLIC_BASE as string | undefined)?.replace(/\/+$/, "");
  if (!base || !folder.trim()) return null;
  const slug = folder.replace(/^\/+|\/+$/g, "");
  return `${base}/${slug}/index.html`;
}

export function defaultMicrositePageUrl(eventId: string): string | null {
  const base = publicWebBase();
  if (!base || !eventId.trim()) return null;
  return `${base}/event/${eventId}`;
}