import { type ClassValue, clsx } from "clsx";
import { twMerge } from "tailwind-merge";

export function cn(...inputs: ClassValue[]) {
  return twMerge(clsx(inputs));
}

export function formatDate(dateString: string | null | undefined) {
  if (!dateString) return "Never";
  return new Intl.DateTimeFormat("en-US", {
    month: "short",
    day: "numeric",
    hour: "numeric",
    minute: "numeric",
  }).format(new Date(dateString));
}

export function formatDuration(ms: number | null | undefined) {
  if (ms == null) return "-";
  if (ms < 1000) return `${ms}ms`;
  return `${(ms / 1000).toFixed(1)}s`;
}