export function money(v: number | string | null | undefined, opts?: { sign?: boolean }): string {
  const n = typeof v === "string" ? Number(v) : v ?? 0;
  if (n === null || Number.isNaN(n)) return "—";
  const f = n.toLocaleString("en-US", {
    style: "currency",
    currency: "USD",
    minimumFractionDigits: 2,
    maximumFractionDigits: 2,
  });
  if (opts?.sign && n > 0) return `+${f}`;
  return f;
}

export function pct(v: number | string | null | undefined, digits = 2): string {
  const n = typeof v === "string" ? Number(v) : v ?? 0;
  if (Number.isNaN(n)) return "—";
  return `${(n * 100).toFixed(digits)}%`;
}

export function num(v: number | string | null | undefined, digits = 2): string {
  const n = typeof v === "string" ? Number(v) : v ?? 0;
  if (Number.isNaN(n)) return "—";
  return n.toLocaleString("en-US", {
    minimumFractionDigits: digits,
    maximumFractionDigits: digits,
  });
}

export function timeAgo(iso: string): string {
  const t = new Date(iso).getTime();
  if (!t) return "—";
  const sec = Math.round((Date.now() - t) / 1000);
  if (sec < 60) return `${sec}s ago`;
  const min = Math.round(sec / 60);
  if (min < 60) return `${min}m ago`;
  const hr = Math.round(min / 60);
  if (hr < 24) return `${hr}h ago`;
  const day = Math.round(hr / 24);
  return `${day}d ago`;
}