export interface InspectionOccupant {
  occupancyId: number;
  inspectionStatus?: 'present' | 'absent' | null;
}

export function getInitialPresentOccupancyIds(
  occupants: InspectionOccupant[],
  submitted: boolean,
): number[] {
  if (!submitted) return [];
  return occupants
    .filter((occupant) => occupant.inspectionStatus === 'present')
    .map((occupant) => occupant.occupancyId);
}

export function togglePresentOccupancy(
  currentIds: number[],
  occupancyId: number,
  present: boolean,
): number[] {
  const next = new Set(currentIds);
  if (present) next.add(occupancyId);
  else next.delete(occupancyId);
  return [...next];
}