package info.ejava.examples.ejb.ejbjpa.bl;
   
   import java.util.List;
   
   import info.ejava.examples.ejb.ejbjpa.bo.Floor;
   import info.ejava.examples.ejb.ejbjpa.bo.Guest;
   import info.ejava.examples.ejb.ejbjpa.bo.Room;
   import info.ejava.examples.ejb.ejbjpa.dao.HotelDAO;
   
  public class HotelMgmtImpl implements HotelMgmt {
      private HotelDAO dao;
      
      public void setHotelDao(HotelDAO dao) {
          this.dao = dao;
      }
  
      @Override
      public Room getRoom(int number) {
          return dao.getRoom(number);
      }
  
      @Override
      public Floor getFloor(int level) {
          return dao.getFloor(level);
      }
  
      @Override
      public List<Floor> getFloors(int offset, int limit) {
          return dao.getFloors(offset, limit);
      }
      
      @Override
      public List<Room> getAvailableRooms(Integer level, int offset, int limit) {
          return dao.getAvailableRooms(level, offset, limit);
      }
      
      @Override
      public Guest checkIn(Guest guest, Room room) throws RoomUnavailableExcepton {
          if (room==null) {
              throw new RoomUnavailableExcepton("no room supplied");
          }
          
          Room hotelRoom = dao.getRoom(room.getNumber());
          if (hotelRoom==null) {
              throw new RoomUnavailableExcepton(String.format("room [%d] does not exist", room.getNumber()));
          }
          
          if (hotelRoom.getOccupant()!=null) {
              throw new RoomUnavailableExcepton(String.format("room is occupied by %s", hotelRoom.getOccupant()));
          }
          
          dao.addGuest(guest);
          hotelRoom.setOccupant(guest);
          return guest;
      }
      
      @Override
      public int checkout(Guest guest) {
          Room room=dao.findRoomByGuest(guest);
          if (room!=null) {
              room.setOccupant(null);
              return 1;
          }
          return 0;
      }
  }