import { SENT_STALE_MS, type VoiceRecord } from './record';

export interface Located {
  path: string;
  record: VoiceRecord;
}

const time = (iso?: string) => (iso ? Date.parse(iso) : NaN);

// Отсутствующее или испорченное время — не повод зависнуть навсегда.
export function isStaleSent(r: VoiceRecord, now: Date): boolean {
  if (r.status !== 'sent') return false;
  const t = time(r.sentAt);
  return Number.isNaN(t) || now.getTime() - t > SENT_STALE_MS;
}

export function due(items: readonly Located[], now: Date, deviceId: string): Located[] {
  return items
    .filter(({ record: r }) => {
      if (r.device !== deviceId) return false;
      if (r.status === 'saved') return true;
      if (r.status !== 'retry') return false;
      const t = time(r.nextAttempt);
      return Number.isNaN(t) || t <= now.getTime();
    })
    .sort((a, b) => (a.record.id < b.record.id ? -1 : a.record.id > b.record.id ? 1 : 0));
}

export function staleOwn(items: readonly Located[], now: Date, deviceId: string): Located[] {
  return items.filter(({ record: r }) => r.device === deviceId && isStaleSent(r, now));
}

export function claimable(items: readonly Located[], now: Date, deviceId: string): Located[] {
  return items.filter(
    ({ record: r }) =>
      r.device !== deviceId && (r.status === 'saved' || r.status === 'retry' || isStaleSent(r, now)),
  );
}