using System;
using System.Collections.Generic;
using System.Linq;
using System.Text;
using System.Threading.Tasks;

namespace Automat
{
    class Program
    {
        public static float givingChange(float priceOfPotion, float userMoney)
        {
            float rest = 0;
            rest = userMoney - priceOfPotion;
            return rest;
        }
        static void Main()
        {
            Fanta newFanta = new Fanta();
            CocaCola newCocaCola = new CocaCola();
            Sprite newSprite = new Sprite();
            while (true)
            {
                Console.WriteLine("Witaj! Wybierz napój, który chcesz kupić!");
                Console.WriteLine("Wcisnij 1 jeśli ma być to Fanta.");
                Console.WriteLine("Wcisnij 2 jeśli ma być to CocaCola.");
                Console.WriteLine("Wciśnij 3 jeśli ma być to Sprite.");
                Console.WriteLine("Wciśnij 4, by zakończyć!");
                int choice = int.Parse(Console.ReadLine());
                Console.WriteLine();
                while (true)
                {
                    if (choice == 1)
                    {
                        Console.Write("Wybrano Fantę. Wrzuć monetę: ");
                        float userMoney = float.Parse(Console.ReadLine());
                        Console.WriteLine("Wrzucono: " + userMoney + ".");
                        Console.WriteLine();
                        if (newFanta.CountOfPotion > 0)
                        {
                            if (userMoney >= newFanta.Price)
                            {
                                Console.WriteLine("Odbierz produkt!");
                                newFanta.CountOfPotion -= 1;
                                Console.WriteLine();
                                if (userMoney > newFanta.Price)
                                {
                                    Console.WriteLine("Reszta to: "+givingChange(newFanta.Price, userMoney)+"zł.");
                                    Console.WriteLine();
                                    break;
                                }
                                else
                                {
                                    break;
                                }
                            }
                            else
                            {
                                Console.WriteLine("Wrzucono za mało pieniędzy!");
                                Console.WriteLine();
                                break;
                            }
                        }
                        else
                        {
                            Console.WriteLine("Brak produktu.");
                            Console.WriteLine("Wydaje reszte: "+givingChange(newFanta.Price, userMoney)+"zł.");
                            Console.WriteLine();
                            break;
                        }
                    }
                    else if (choice == 2)
                    {
                        Console.Write("Wybrano CocaCole. Wrzuć monetę: ");
                        float userMoney = float.Parse(Console.ReadLine());
                        Console.WriteLine("Wrzucono: " + userMoney + ".");
                        Console.WriteLine();
                        if (newCocaCola.CountOfPotion > 0)
                        {
                            if (userMoney >= newCocaCola.Price)
                            {
                                Console.WriteLine("Odbierz produkt!");
                                newCocaCola.CountOfPotion -= 1;
                                Console.WriteLine();
                                if (userMoney > newCocaCola.Price)
                                {
                                    Console.WriteLine("Reszta to: "+givingChange(newCocaCola.Price, userMoney)+"zł.");
                                    Console.WriteLine();
                                    break;
                                }
                                else
                                {
                                    break;
                                }
                            }
                            else
                            {
                                Console.WriteLine("Wrzucono za mało pieniędzy!");
                                Console.WriteLine();
                                break;
                            }
                        }
                        else
                        {
                            Console.WriteLine("Brak produktu.");
                            Console.WriteLine("Wydaje reszte: "+givingChange(newSprite.Price, userMoney)+"zł.");
                            Console.WriteLine();
                            break;
                        }
                    }
                    else if (choice == 3)
                    {
                        Console.Write("Wybrano Sprite. Wrzuć monetę: ");
                        float userMoney = float.Parse(Console.ReadLine());
                        Console.WriteLine("Wrzucono: " + userMoney + ".");
                        Console.WriteLine();
                        if (newSprite.CountOfPotion > 0)
                        {
                            if (userMoney >= newSprite.Price)
                            {
                                Console.WriteLine("Odbierz produkt!");
                                newSprite.CountOfPotion -= 1;
                                Console.WriteLine();

                                if (userMoney > newSprite.Price)
                                {
                                    Console.WriteLine("Reszta to: "+givingChange(newSprite.Price, userMoney)+"zł.");
                                    Console.WriteLine();
                                    break;
                                }
                                else
                                {
                                    break;
                                }
                            }
                            else
                            {
                                Console.WriteLine("Wrzucono za mało pieniędzy!");
                                Console.WriteLine();
                                break;
                            }
                        }
                        else
                        {
                            Console.WriteLine("Brak produktu.");
                            Console.WriteLine("Wydaje reszte: "+givingChange(newSprite.Price, userMoney)+"zł.");
                            Console.WriteLine();
                            break;
                        }
                    }
                    else if (choice == 4)
                    {
                        System.Environment.Exit(1);
                    }
                    else
                    {
                        Console.WriteLine("Nie ma takiego wyboru.");
                        Console.WriteLine();
                        break;
                    }
                }
            }
        }
    }

    class Fanta
    {
        int countOfPotion;
        public int CountOfPotion
        {
            get { return countOfPotion; }
            set { countOfPotion = value; }
        }
        float price;
        public float Price
        {
            get { return price; }
            set { price = value; }
        }

        public Fanta()
        {
            countOfPotion = 3;
            price = 3.0f;
        }
    }
    class CocaCola
    {
        int countOfPotion;
        public int CountOfPotion
        {
            get { return countOfPotion; }
            set { countOfPotion = value; }
        }
        float price;
        public float Price
        {
            get { return price; }
            set { price = value; }
        }
        public CocaCola()
        {
            countOfPotion = 3;
            price = 2.50f;
        }
    }
    class Sprite
    {
        int countOfPotion;
        public int CountOfPotion
        {
            get { return countOfPotion; }
            set { countOfPotion = value; }
        }
        float price;
        public float Price
        {
            get { return price; }
            set { price = value; }
        }
        public Sprite()
        {
            countOfPotion = 3;
            price = 3.50f;
        }
    }
}