/**
 * Format a date as a human-friendly relative time string
 * Examples: "just now", "5m ago", "2h ago", "3d ago", "Jan 15"
 */
export function formatTimeAgo(date: Date): string {
  const now = new Date();
  const diffMs = now.getTime() - date.getTime();
  const diffSec = Math.floor(diffMs / 1000);
  const diffMin = Math.floor(diffSec / 60);
  const diffHour = Math.floor(diffMin / 60);
  const diffDay = Math.floor(diffHour / 24);

  if (diffSec < 10) {
    return "just now";
  }

  if (diffMin < 1) {
    return `${diffSec}s ago`;
  }

  if (diffHour < 1) {
    return `${diffMin}m ago`;
  }

  if (diffDay < 1) {
    return `${diffHour}h ago`;
  }

  if (diffDay < 7) {
    return `${diffDay}d ago`;
  }

  // For older dates, show abbreviated month and day
  const month = date.toLocaleDateString("en-US", { month: "short" });
  const day = date.getDate();
  return `${month} ${day}`;
}