superMarket

using Microsoft.VisualBasic.CompilerServices;
using System;
using System.Collections.Generic;
using System.Linq;


namespace Supermarket
{
    class Program
    {
        static void Main(string[] args)
        {
            Random rand = new Random();
            Shop shop = new Shop(0);
            shop.GetProducts();

            Client client1 = new Client(rand.Next(300, 1000));
            Client client2 = new Client(rand.Next(300, 1000));
            Client client3 = new Client(rand.Next(300, 1000));
            Client client4 = new Client(rand.Next(300, 1000));
            Client client5 = new Client(rand.Next(300, 1000));

            client1.PutIntoCart(shop.GetRandomItem(), shop.GetRandomItem());
            client2.PutIntoCart(shop.GetRandomItem(), shop.GetRandomItem());
            client3.PutIntoCart(shop.GetRandomItem(), shop.GetRandomItem());
            client4.PutIntoCart(shop.GetRandomItem(), shop.GetRandomItem());
            client5.PutIntoCart(shop.GetRandomItem(), shop.GetRandomItem());

            shop.GetInLine(client1);
            shop.GetInLine(client2);
            shop.GetInLine(client3);
            shop.GetInLine(client4);
            shop.GetInLine(client5);
            shop.Work();
        }
    }

    class Shop
    {
        public int Money { get; private set; }
        private List<Product> _products = new List<Product>();
        private Queue<Client> _queueLine = new Queue<Client>();

        public Shop(int money)
        {
            Money = money;
            List<Product> _products = new List<Product>();
            Queue<Client> _queue = new Queue<Client>();
        }

        public void Work()
        {
            while (_queueLine.Count != 0)
            {
                var currentClient = _queueLine.Dequeue();
                bool isPaid = false;
                while (isPaid == false)
                {
                    if (currentClient.SumUpPrice() <= currentClient.Money)
                    {
                        currentClient.Pay(currentClient.SumUpPrice());
                        Money += currentClient.SumUpPrice();
                        Console.WriteLine("Клиент обслужен!");
                        Console.WriteLine("Денег у магазина: " + Money);
                        isPaid = true;
                    }
                    else
                    {
                        Console.WriteLine("Пришлось кое-что выкинуть...");
                        currentClient.ThrowAway();
                    }
                }
            }
        }

        public void GetProducts()
        {
            _products.Add(new Product("Milk", 55));
            _products.Add(new Product("Bread", 45));
            _products.Add(new Product("Caviar", 340));
            _products.Add(new Product("Potatoe", 30));
            _products.Add(new Product("Cereals", 200));
        }

        public Product GetRandomItem()
        {
            Random rand = new Random();
            return _products[rand.Next(0, 5)];
        }

        public void GetInLine(Client client)
        {
            _queueLine.Enqueue(client);
        }
    }

    class Client
    {
        public int Money { get; private set; }

        private List<Product> _cart = new List<Product>();

        public Client(int money)
        {
            Money = money;
            List<Product> _cart = new List<Product>();
        }

        public void PutIntoCart(Product product1, Product product2)
        {
            _cart.Add(product1);
            _cart.Add(product2);
        }

        public int SumUpPrice()
        {
            int sum = 0;
            foreach (var item in _cart)
            {
                sum += item.Price;
            }
            return sum;
        }

        public void Pay(int totalPrice)
        {
            Money -= totalPrice;
        }

        public void ThrowAway()
        {
            Random rand = new Random();
            _cart.RemoveAt(rand.Next(0, 1));
        }
    }

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

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