import { locales, type AppLocale } from "@/i18n/locales";

export function getBaseUrl(): string {
  const raw =
    process.env.NEXT_PUBLIC_BASE_URL ||
    process.env.NEXTAUTH_URL || // fallback if ever added
    "http://localhost:3000";
  return raw.replace(/\/+$/, "");
}

export function toAbsoluteUrl(path: string): string {
  const base = getBaseUrl();
  const normalized = path.startsWith("/") ? path : `/${path}`;
  return `${base}${normalized}`;
}

export function getLanguageAlternates(opts: {
  /** Path without locale prefix, e.g. "/projects" or "/projects/my-slug" or "" */
  pathWithoutLocale: string;
}): Record<AppLocale, string> {
  const path = opts.pathWithoutLocale === "" ? "" : `/${opts.pathWithoutLocale}`.replace(/\/{2,}/g, "/");
  const normalizedPath = path === "/" ? "" : path;

  return locales.reduce((acc, l) => {
    const url = toAbsoluteUrl(`/${l}${normalizedPath}`);
    acc[l] = url;
    return acc;
  }, {} as Record<AppLocale, string>);
}