ДЗ Супермаркет

using System;
using System.Collections.Generic;

namespace CSLight
{
    internal class Program
    {
        static void Main(string[] args)
        {
            Supermarket shop = new Supermarket();
            shop.ServeQueue();
        }
    }

    class Supermarket
    {
        private Queue<Buyer> _buyers = new Queue<Buyer>();
        private List<Product> _products = new List<Product>();

        private int _money = 0;

        public Supermarket()
        {
            InitProducts();
            InitBuyers();
        }

        private void InitProducts()
        {
            int maxProductPrice = 100;
            int minProductPrice = 10;
            _products.Add(new Product("Product1", UserUtils.GetRandomNumber(minProductPrice, maxProductPrice)));
            _products.Add(new Product("Product2", UserUtils.GetRandomNumber(minProductPrice, maxProductPrice)));
            _products.Add(new Product("Product3", UserUtils.GetRandomNumber(minProductPrice, maxProductPrice)));
            _products.Add(new Product("Product4", UserUtils.GetRandomNumber(minProductPrice, maxProductPrice)));
            _products.Add(new Product("Product5", UserUtils.GetRandomNumber(minProductPrice, maxProductPrice)));
            _products.Add(new Product("Product6", UserUtils.GetRandomNumber(minProductPrice, maxProductPrice)));
            _products.Add(new Product("Product7", UserUtils.GetRandomNumber(minProductPrice, maxProductPrice)));
            _products.Add(new Product("Product8", UserUtils.GetRandomNumber(minProductPrice, maxProductPrice)));
            _products.Add(new Product("Product9", UserUtils.GetRandomNumber(minProductPrice, maxProductPrice)));
            _products.Add(new Product("Product10", UserUtils.GetRandomNumber(minProductPrice, maxProductPrice)));
        }

        public void ServeQueue()
        {
            while (_buyers.Count > 0)
            {
                Trade();
            }

            Console.WriteLine("Очередь закончилась");
        }

        private void InitBuyers()
        {
            int minBuyers = 7;
            int maxBuyers = 20;
            int buyers = UserUtils.GetRandomNumber(minBuyers, maxBuyers);

            for (int i = 0; i < buyers; i++)
            {
                _buyers.Enqueue(CreateBuyer());
            }
        }

        private Buyer CreateBuyer()
        {
            Buyer buyer = new Buyer();

            for (int i = 0; i < buyer.ProductsNeededCout; i++)
            {
                int productId = UserUtils.GetRandomNumber(0, _products.Count - 1);
                buyer.AddProductToBasket(_products[productId]);
            }

            return buyer;
        }

        private void Trade()
        {
            bool isTrading = true;
            Buyer buyer = _buyers.Dequeue();

            Console.WriteLine($"В очереди еще {_buyers.Count} человек");

            while (isTrading)
            {
                Console.WriteLine($"У покупателя {buyer.Money} денег");
                Console.WriteLine("Его корзина:");
                buyer.ShowProductsInBasket();
                Console.WriteLine($"Общая стоимость {buyer.CalculateTotalPrice()}");

                if (buyer.TryPayProducts())
                {
                    buyer.ExchangeProductFromBasketToInventory();
                    _money += buyer.CalculateTotalPrice();
                    isTrading = false;
                }
                else
                {
                    buyer.RemoveRandomProduct();
                }

                Console.ReadKey();
            }

            if (buyer.GetProductsInInventoryCount() == 0)
            {
                Console.WriteLine("У покупателя не хватло денег ни на что");
            }

            Console.WriteLine("Покупатель ушел");
        }
    }

    class Buyer
    {
        private List<Product> _basket = new List<Product>();
        private List<Product> _inventory = new List<Product>();

        private int _minProductsNeededCount = 1;
        private int _maxProductsNeededCount = 10;

        public Buyer()
        {
            int maxPossibleMoney = 350;
            int minPossibleMoney = 10;
            Money = UserUtils.GetRandomNumber(minPossibleMoney, maxPossibleMoney);

            ProductsNeededCout = UserUtils.GetRandomNumber(_minProductsNeededCount, _maxProductsNeededCount);
        }

        public int Money { get; private set; }

        public int ProductsNeededCout { get; private set; }

        public void RemoveRandomProduct()
        {
            if (_basket.Count > 0)
            {
                _basket.RemoveAt(UserUtils.GetRandomNumber(0, _basket.Count - 2));
            }
            else
            {
                _basket.Clear();
            }
        }

        public void ShowProductsInBasket()
        {
            foreach (Product product in _basket)
            {
                Console.WriteLine($"{product.Name} - {product.Price}");
            }
        }

        public bool TryPayProducts()
        {
            if (CalculateTotalPrice() > Money)
            {
                return false;
            }
            else
            {
                Money -= CalculateTotalPrice();
                return true;
            }
        }

        public void ExchangeProductFromBasketToInventory()
        {
            Product tempProduct;

            foreach (Product product in _basket)
            {
                tempProduct = product;
                _inventory.Add(tempProduct);
            }

            _basket.Clear();
            Console.WriteLine(_inventory.Count);
        }

        public int GetProductsInInventoryCount()
        {
            return _inventory.Count;
        }

        public void AddProductToBasket(Product product)
        {
            _basket.Add(product);
        }

        public int CalculateTotalPrice()
        {
            int totalPrice = 0;

            foreach (Product product in _basket)
            {
                totalPrice += product.Price;
            }

            return totalPrice;
        }
    }

    class Product
    {
        public Product(string name, int price)
        {
            Name = name;
            Price = price;
        }

        public string Name { get; private set; }
        public int Price { get; private set; }
    }

    class UserUtils
    {
        private static Random s_random = new Random();

        public static int GetRandomNumber(int minValue, int maxValue)
        {
            return s_random.Next(minValue, maxValue + 1);
        }
    }
}