facade C# example

Program.cs

class SkiRent // аренда снаряжения
{
    public double RentBoots(int feetSize, int skierLevel) // ботинки
    {
        double price = 159.99;
        // if (feetSize < 40) price -= 20; // скидка для детей
        return price;
    }

    public double RentHelmet(int headSize, int skierLevel) // шлем
    {
        return 120;
    }

    public double RentSki(int weight, int skierLevel) // лыжи
    {
        return 180;
    }

    public double RentSkiPoles(int height) // лыжные палки
    {
        return 50;
    }
}

// https://bukovel24.com/ru/skipass
class SkiResortTicketSystem // покупка билетов
{
    public double BuyOneDayTicket()
    {
        return 1100;
    }

    public double BuyTwoDaysTicket()
    {
        return 2050;
    }

    public double BuyThreeDaysTicket()
    {
        return 2900;
    }

    public double BuyFourDaysTicket()
    {
        return 3800;
    }

    public double BuyFiveDaysTicket()
    {
        return 4600;
    }

    public double BuySixDaysTicket()
    {
        return 5150;
    }

    public double BuySevenDaysTicket()
    {
        return 5800;
    }
}

// https://bukovel24.com/uk/hotels
class HotelBookingSystem // заказ гостиницы
{
    public double BookRoom(int roomQuality)
    {
        switch (roomQuality)
        {
            case 3:
                return 5670 / 2;
            case 4:
                return 9240 / 2;
            case 5:
                return 41500 / 2;
            default:
                throw new ArgumentException("roomQuality should be in range [3;5]");
        }
    }
}

class SkiResortFacade // реализация паттерна "фасад"
{
    private SkiRent skiRent;
    private SkiResortTicketSystem ticketSystem;
    private HotelBookingSystem bookingSystem;

    public SkiResortFacade()
    {
        skiRent = new SkiRent();
        ticketSystem = new SkiResortTicketSystem();
        bookingSystem = new HotelBookingSystem();
    }

    public double HaveAVeryVeryNiceTime(int height, int weight, int feetSize, int skierLevel, int roomQuality)
    {
        double skiPrice = skiRent.RentSki(weight, skierLevel);
        double skiBootsPrice = skiRent.RentBoots(feetSize, skierLevel);
        double polesPrice = skiRent.RentSkiPoles(height);
        double skiPassPrice = ticketSystem.BuySevenDaysTicket();
        double hotelPrice = bookingSystem.BookRoom(roomQuality);

        return skiPrice + skiBootsPrice + polesPrice + skiPassPrice + hotelPrice;
    }

    public double HaveALittleFunWithYourOwnEquipmentAndTent()
    {
        double skiPassPrice = ticketSystem.BuyOneDayTicket();
        return 0 + 0 + 0 + skiPassPrice + 0;
    }
}

class Program
{
    static void Main()
    {
        SkiResortFacade facade = new SkiResortFacade();
        double vacationPrice = facade.HaveAVeryVeryNiceTime(177, 80, 43, 0, 5);
        // double vacationPrice = facade.HaveAVeryVeryNiceTime(177, 80, 43, 0, 4);
        // double vacationPrice = facade.HaveAVeryVeryNiceTime(177, 80, 43, 0, 3);
        // double vacationPrice = facade.HaveALittleFunWithYourOwnEquipmentAndTent();
        Console.WriteLine("Price: " + vacationPrice);
    }
}