export function formatRelativeDate(iso: string): string {
  const date = new Date(iso);
  const now = new Date();
  const diffMs = now.getTime() - date.getTime();
  if (diffMs < 0) return "Today";
  const diffDays = Math.floor(diffMs / 86400000);
  if (diffDays === 0) return "Today";
  if (diffDays === 1) return "Yesterday";
  if (diffDays < 30) return `${diffDays}d ago`;
  const diffMonths = Math.floor(diffDays / 30);
  if (diffMonths < 12) return `${diffMonths}mo ago`;
  return date.toLocaleDateString();
}

const ABSOLUTE_FORMATTER = new Intl.DateTimeFormat(undefined, {
  year: "numeric",
  month: "short",
  day: "numeric",
  hour: "numeric",
  minute: "2-digit",
});

export function formatAbsoluteDate(iso: string): string {
  return ABSOLUTE_FORMATTER.format(new Date(iso));
}