export function formatResetCountdown(resetAtSeconds: number): string {
  const nowSeconds = Math.floor(Date.now() / 1000);
  const diffSeconds = resetAtSeconds - nowSeconds;

  if (diffSeconds <= 0) return "resetting now";
  if (diffSeconds < 60) return "resets in <1m";

  const hours = Math.floor(diffSeconds / 3600);
  const minutes = Math.floor((diffSeconds % 3600) / 60);

  if (hours > 0 && minutes > 0) return `resets in ${hours}h ${minutes}m`;
  if (hours > 0) return `resets in ${hours}h`;
  return `resets in ${minutes}m`;
}

export function formatResetCountdownISO(isoString: string): string {
  const resetAtSeconds = Math.floor(new Date(isoString).getTime() / 1000);
  return formatResetCountdown(resetAtSeconds);
}

export function windowLabel(limitWindowSeconds: number): string {
  if (limitWindowSeconds <= 3600) return "1h window";
  if (limitWindowSeconds <= 86400) return "24h window";
  return `${Math.round(limitWindowSeconds / 3600)}h window`;
}