/**
 * Row health: operational | degraded | down
 * @module classify
 */

/**
 * @param {{
 *   min?: number,
 *   available?: number,
 *   running?: number,
 *   paused?: number,
 *   managed?: boolean,
 *   instances?: Array<{ pid?: number|null, paused?: boolean, healthy?: boolean }>
 * }} sv
 * @returns {'operational'|'degraded'|'down'}
 */
export function classifyService(sv) {
  const min = sv.min ?? 0;
  const available = sv.available ?? 0;
  const running = sv.running ?? 0;
  const paused = sv.paused ?? 0;
  const inst = sv.instances || [];
  const unhealthy = inst.filter((i) => i.pid && i.healthy === false && !i.paused).length;

  if (min === 0 && running === 0) return 'operational';
  if (available === 0 && min > 0) return 'down';
  if (available >= min && paused === 0 && unhealthy === 0) return 'operational';
  return 'degraded';
}