/**
 * Shared elapsed-time formatting for tool results, widgets, and status lines.
 * Leaf module: no imports from other subagent modules.
 */

/** Compact human elapsed time from a seconds count: "42s", "3m 7s". */
export function formatElapsed(seconds: number): string {
  if (seconds < 60) return `${seconds}s`;
  const m = Math.floor(seconds / 60);
  const s = seconds % 60;
  return `${m}m ${s}s`;
}

/** Coarse human elapsed time from a millisecond duration: "42s", "3m", "1h 12m". */
export function formatElapsedDuration(ms: number): string {
  const totalSeconds = Math.max(0, Math.floor(ms / 1000));
  if (totalSeconds < 60) return `${totalSeconds}s`;

  const hours = Math.floor(totalSeconds / 3600);
  const minutes = Math.floor((totalSeconds % 3600) / 60);
  if (hours > 0) return `${hours}h ${minutes}m`;

  return `${minutes}m`;
}

/** Stopwatch-style elapsed time between two epoch millis: "03:07". */
export function formatElapsedMMSS(startTime: number, endTime = Date.now()): string {
  const seconds = Math.floor((endTime - startTime) / 1000);
  const m = Math.floor(seconds / 60);
  const s = seconds % 60;
  return `${String(m).padStart(2, "0")}:${String(s).padStart(2, "0")}`;
}