using System;
using System.Collections.Generic;
using System.Linq;

public abstract class Vehicle
{
    public int ID { get; private set; }
    public string Brand { get; private set; }
    public string Model { get; private set; }
    public bool IsRented { get; private set; }

    protected Vehicle(int id, string brand, string model)
    {
        ID = id;
        Brand = brand;
        Model = model;
        IsRented = false;
    }

    public void RentVehicle()
    {
        if (!IsRented)
        {
            IsRented = true;
            Console.WriteLine($"Vehicle {ID} has been rented.");
        }
        else
        {
            Console.WriteLine($"Vehicle {ID} is already rented.");
        }
    }

    public void ReturnVehicle()
    {
        if (IsRented)
        {
            IsRented = false;
            Console.WriteLine($"Vehicle {ID} has been returned.");
        }
        else
        {
            Console.WriteLine($"Vehicle {ID} is not currently rented.");
        }
    }

    public abstract void DisplayInfo();
}

public class Car : Vehicle
{
    public int NumberOfDoors { get; private set; }

    public Car(int id, string brand, string model, int numberOfDoors)
        : base(id, brand, model)
    {
        NumberOfDoors = numberOfDoors;
    }

    public override void DisplayInfo()
    {
        Console.WriteLine($"Car ID: {ID}, Brand: {Brand}, Model: {Model}, Doors: {NumberOfDoors}, Rented: {IsRented}");
    }
}

public class Truck : Vehicle
{
    public int LoadCapacity { get; private set; }

    public Truck(int id, string brand, string model, int loadCapacity)
        : base(id, brand, model)
    {
        LoadCapacity = loadCapacity;
    }

    public override void DisplayInfo()
    {
        Console.WriteLine($"Truck ID: {ID}, Brand: {Brand}, Model: {Model}, Load Capacity: {LoadCapacity}kg, Rented: {IsRented}");
    }
}

public class Motorcycle : Vehicle
{
    public bool HasSideCar { get; private set; }

    public Motorcycle(int id, string brand, string model, bool hasSideCar)
        : base(id, brand, model)
    {
        HasSideCar = hasSideCar;
    }

    public override void DisplayInfo()
    {
        Console.WriteLine($"Motorcycle ID: {ID}, Brand: {Brand}, Model: {Model}, Sidecar: {HasSideCar}, Rented: {IsRented}");
    }
}

public static class VehicleUtils
{
    public static double CalculateFine(int daysLate)
    {
        double dailyFine = 50.0; // فرض غرامة يومية
        return daysLate * dailyFine;
    }

    public static void DisplayRentalPolicy()
    {
        Console.WriteLine("Rental Policy: Late returns will incur a daily fine of $50.");
    }
}

public class VehicleOffice
{
    private List<Vehicle> vehicles = new List<Vehicle>();

    public void AddVehicle(Vehicle vehicle)
    {
        vehicles.Add(vehicle);
    }

    public void DisplayAllVehicles()
    {
        foreach (var vehicle in vehicles)
        {
            vehicle.DisplayInfo();
        }
    }

    public Vehicle SearchVehicleById(int id)
    {
        return vehicles.FirstOrDefault(v => v.ID == id);
    }
}

class Program
{
    static void Main(string[] args)
    {
        VehicleOffice office = new VehicleOffice();

        // Adding Vehicles
        office.AddVehicle(new Car(1, "Toyota", "Corolla", 4));
        office.AddVehicle(new Truck(2, "Ford", "F-150", 1000));
        office.AddVehicle(new Motorcycle(3, "Harley-Davidson", "Street 750", false));

        // Display all vehicles
        Console.WriteLine("All Vehicles:");
        office.DisplayAllVehicles();

        // Search for a vehicle and rent it
        Console.WriteLine("\nSearching for Vehicle with ID 1:");
        Vehicle vehicle = office.SearchVehicleById(1);
        if (vehicle != null)
        {
            vehicle.RentVehicle();
            vehicle.DisplayInfo();
            
            // Returning the vehicle
                        vehicle.ReturnVehicle();
            vehicle.DisplayInfo();
        }
        else
        {
            Console.WriteLine("Vehicle not found.");
        }

        // Display rental policy
        VehicleUtils.DisplayRentalPolicy();
        
        // Example of calculating fine
        int daysLate = 3; // عدد الأيام المتأخرة
        double fine = VehicleUtils.CalculateFine(daysLate);
        Console.WriteLine($"Total fine for {daysLate} days late: ${fine}");
    }
}