import manifest from '../localization/ROUTE_MANIFEST_v1.0.json';
type Locale = 'en' | 'fr' | 'ar';
export function localizedPath(routeId: string, locale: Locale): string {
  const route = manifest.routes.find((item) => item.id === routeId);
  if (!route) throw new Error(`Unknown route: ${routeId}`);
  const slug = route.slugs[locale];
  return slug ? `/${locale}/${slug}` : `/${locale}`;
}
export function hreflangLinks(origin: string, routeId: string) {
  const alternates = manifest.locales.map((locale) => ({
    rel: 'alternate',
    hreflang: locale,
    href: new URL(localizedPath(routeId, locale as Locale), origin).href,
  }));
  alternates.push({
    rel: 'alternate',
    hreflang: 'x-default',
    href: new URL(localizedPath(routeId, 'en'), origin).href,
  });
  return alternates;
}
