import { type Locale, WORD_GRID_LOCALES } from "./locales";

export const wordPackAvailable = (locale: Locale) => WORD_GRID_LOCALES.includes(locale);
export const WORD_PACK_VERSION = "2026-09-1";
export function normalizePackWord(value: unknown, locale: Locale = "en") {
  const input = String(value ?? "").trim();
  if (locale === "en") return input.toUpperCase();
  // Spanish Ñ is a separate letter; acute accents remain optional for tracing.
  const protectedInput = locale === "es" ? input.normalize("NFC").replace(/ñ/gi, "\u0001") : input;
  const normalized = locale === "de"
    ? protectedInput.normalize("NFC").replace(/ß/gi, "ss")
    : protectedInput.normalize("NFD").replace(/\p{M}/gu, "").replace(/œ/gi, "oe").replace(/æ/gi, "ae");
  return normalized.replaceAll("\u0001", "ñ").toLocaleUpperCase(locale);
}
export function packTileLetters(value: unknown, locale: Locale = "en") {
  const tile = locale === "en" ? String(value ?? "").toUpperCase() : normalizePackWord(value, locale);
  if (locale === "en") return tile === "Q" || tile === "QU" ? "QU" : /^[A-Z]$/.test(tile) ? tile : "";
  if (!wordPackAvailable(locale)) return "";
  return (locale === "es" ? /^[A-ZÑ]$/ : locale === "de" ? /^(?:[A-ZÄÖÜ]|SS)$/ : /^[A-Z]$/).test(tile) ? tile : "";
}