import type { Quiz } from "@/lib/api";

export const KIND_LABEL: Record<Quiz["target_kind"], string> = {
  chapter: "Book chapter",
  lecture: "Lecture",
  conversation: "Conversation",
  standalone: "Stand-alone",
};

/** "1m 12s" / "8.4s" — response times read better than raw milliseconds. */
export function fmtMs(ms: number | null | undefined): string {
  if (ms == null) return "—";
  if (ms < 60_000) return `${(ms / 1000).toFixed(1)}s`;
  const m = Math.floor(ms / 60_000);
  const s = Math.round((ms % 60_000) / 1000);
  return `${m}m ${s}s`;
}