export function formatGB(gb: number): string {
  if (gb >= 1000) return `${(gb / 1000).toFixed(2)} TB`;
  return `${gb.toFixed(1)} GB`;
}

export function formatHours(h: number): string {
  if (h >= 1000) return `${(h / 1000).toFixed(1)}k h`;
  return `${h.toFixed(0)}h`;
}

export function timeAgo(iso: string | null | undefined): string {
  if (!iso) return "Never";
  const diff = Date.now() - new Date(iso).getTime();
  const mins = Math.floor(diff / 60_000);
  if (mins < 1) return "just now";
  if (mins < 60) return `${mins}m ago`;
  const hrs = Math.floor(mins / 60);
  if (hrs < 24) return `${hrs}h ago`;
  const days = Math.floor(hrs / 24);
  if (days < 30) return `${days}d ago`;
  return new Date(iso).toLocaleDateString(undefined, { month: "short", year: "numeric" });
}

export function unixTimeAgo(ts: number | null): string {
  if (ts === null) return "Never";
  return timeAgo(new Date(ts * 1000).toISOString());
}