export const SUPPORTED_LOCALES = ["sr", "en", "de", "fr"] as const;
export type Locale = (typeof SUPPORTED_LOCALES)[number];

export const DEFAULT_LOCALE: Locale = "sr";

export const LOCALE_COOKIE = "NEXT_LOCALE";

export const LOCALE_CONFIG: Record<Locale, { label: string; flag: string; saleorLocale: string }> = {
  sr: { label: "Srpski", flag: "🇷🇸", saleorLocale: "SR" },
  en: { label: "English", flag: "🇬🇧", saleorLocale: "EN" },
  de: { label: "Deutsch", flag: "🇩🇪", saleorLocale: "EN" },
  fr: { label: "Français", flag: "🇫🇷", saleorLocale: "EN" },
};

export function isValidLocale(locale: string): locale is Locale {
  return SUPPORTED_LOCALES.includes(locale as Locale);
}

export function getSaleorLocale(locale: Locale): string {
  return LOCALE_CONFIG[locale].saleorLocale;
}

export function getLocaleFromPath(pathname: string): string {
  const pattern = SUPPORTED_LOCALES.join("|");
  const match = pathname.match(new RegExp(`^\\/(${pattern})`));
  return match ? match[1] : DEFAULT_LOCALE;
}

export function getPathWithoutLocale(pathname: string): string {
  const pattern = SUPPORTED_LOCALES.join("|");
  return pathname.replace(new RegExp(`^\\/(${pattern})`), "") || "/";
}

export function buildLocalePath(locale: Locale, path: string): string {
  const pathPart = path === "/" ? "" : path;
  return `/${locale}${pathPart}`;
}