// Small pure render helpers shared across swarm-ui pages. Not folded
// into `@hive/shared` — swarm-ui's formatting choices aren't a
// cross-package contract, and there's nothing here worth sharing.

// Relative age, coarsened to one unit ("5m ago"). Built on the native
// `Intl.RelativeTimeFormat` (no dependency needed — mara asked whether
// a lightweight package was warranted; the runtime already ships this)
// with `style: 'narrow'`, which produces the same "5s/5m/5h/5d ago"
// shape the dashboard package's hand-rolled equivalent does, verified
// against a real `Intl` call rather than assumed from the spec.
const RTF = new Intl.RelativeTimeFormat('en', { numeric: 'always', style: 'narrow' });

export function fmtAgo(ageSeconds: number): string {
  const age = Math.max(0, Math.floor(ageSeconds));
  if (age < 60) return RTF.format(-age, 'second');
  if (age < 3600) return RTF.format(-Math.floor(age / 60), 'minute');
  if (age < 86400) return RTF.format(-Math.floor(age / 3600), 'hour');
  return RTF.format(-Math.floor(age / 86400), 'day');
}