export class TimeFormatter {
  static timeAgo(timestamp: Date | string): string {
    const date = typeof timestamp === 'string' ? new Date(timestamp) : timestamp;
    const diffMs = Date.now() - date.getTime();
    const diffMinutes = Math.floor(diffMs / 60000);
    if (diffMinutes < 1) return 'Just now';
    if (diffMinutes < 60) return `${diffMinutes} min ago`;
    const diffHours = Math.floor(diffMinutes / 60);
    if (diffHours < 24) return `${diffHours} h ago`;
    const diffDays = Math.floor(diffHours / 24);
    return `${diffDays} d ago`;
  }
}