Consider Scalability and Flexibility

Additional Floors and Spots:
- By using a ParkingFloor class that can be instantiated multiple times within a ParkingLot, you can easily scale the number of floors. Each floor can be initialized with varying numbers and types of ParkingSpots, allowing you to adjust the capacity as needed.
Flexible Spot Allocation:
- With individual ParkingSpot management, adding more spots or configuring different sizes/types is straightforward. You simply update the initialization parameters to reflect the desired count and types of spots per floor.
Tracking and Operations:
- You maintain a collection of ParkingSpot objects, allowing for efficient tracking and operations such as finding available spots and updating spot states. This helps to ensure quick operations even as more spots and vehicles are added.

Adding New Vehicle Types:
- If you decide to introduce new vehicle types, you can extend the existing Vehicle class or introduce new subclasses, such as Van or ElectricVehicle. This approach allows easy integration without altering the existing system structure significantly.
Enhanced Pricing Models:
- You can implement additional PricingStrategy classes to introduce new pricing models (e.g., weekend rates, progressive pricing, etc.). The system can then switch between strategies without needing to modify the core logic.
Reservation System:
- To implement a reservation system, you could add a reservation status to each ParkingSpot and maintain a list of upcoming reservations. This feature would involve extending your ParkingSpot management with methods to reserve and track reservations without changing the existing core functionality.
Advanced Spot Allocation:
- You can overlay more complex logic for spot allocation (e.g., priority for electric vehicles with charging stations) by adding algorithms to the ParkingFloor class. This can be achieved by refining findAvailableSpot() methods to incorporate new rules.
Multi-lot Management:
- If your organization manages multiple parking lots, a ParkingLotManager class could be introduced to handle collections of ParkingLot instances. This allows the system to scale to manage multiple facilities from a central framework.