export const MASKED = "••••••";
const KEY = "mercury.hideAmounts";

export function isHidden(): boolean {
  try { return localStorage.getItem(KEY) === "true"; } catch { return false; }
}
export function setHidden(b: boolean): void {
  try { localStorage.setItem(KEY, String(b)); } catch {}
}
function num(v: string | number): number {
  return typeof v === "number" ? v : parseFloat(v || "0") || 0;
}
export function grouped(v: string | number): string {
  return new Intl.NumberFormat("en-US", { maximumFractionDigits: 0 }).format(num(v));
}
export function tugrikRaw(v: string | number): string { return `${grouped(v)}₮`; }
export function tugrikShortRaw(v: string | number): string {
  const m = num(v) / 1_000_000;
  if (m >= 1) return `${m.toFixed(1).replace(".", ",")}сая₮`;
  return tugrikRaw(v);
}
export function tugrik(v: string | number): string { return isHidden() ? MASKED : tugrikRaw(v); }
export function tugrikShort(v: string | number): string { return isHidden() ? MASKED : tugrikShortRaw(v); }