export function cleanOptionLabel(value: string | null | undefined) {
  return String(value || "")
    .replace(/[\u0000-\u001F\u007F-\u009F\u200B-\u200D\uFEFF]/g, "")
    .replace(/\s+/g, " ")
    .trim();
}

export function normalizeOptionKey(value: string | null | undefined) {
  return cleanOptionLabel(value)
    .normalize("NFD")
    .replace(/[\u0300-\u036f]/g, "")
    .toLowerCase()
    .replace(/[^\p{L}\p{N}]+/gu, " ")
    .trim();
}

export function canonicalOptionLabel(value: string | null | undefined) {
  const cleanValue = cleanOptionLabel(value);
  const key = normalizeOptionKey(cleanValue);

  if (key === "republica dominicana") return "Republica Dominicana";

  return cleanValue;
}

export function dedupeOptions(values: Array<string | null | undefined>) {
  const unique = new Map<string, string>();

  for (const value of values) {
    const cleanValue = canonicalOptionLabel(value);
    if (!cleanValue) continue;

    const key = normalizeOptionKey(cleanValue);
    if (!key) continue;

    if (!unique.has(key)) {
      unique.set(key, cleanValue);
    }
  }

  return Array.from(unique.values());
}

export function ensureOption(options: string[], value: string | null | undefined) {
  const uniqueOptions = dedupeOptions(options);
  const current = canonicalOptionLabel(value);

  if (!current) return uniqueOptions;

  const currentKey = normalizeOptionKey(current);
  const exists = uniqueOptions.some((option) => normalizeOptionKey(option) === currentKey);

  return exists ? uniqueOptions : [current, ...uniqueOptions];
}