ООП-7

using System;
using System.Collections.Generic;

namespace Homework7
{
    class Program
    {
        static void Main(string[] args)
        {
            Supermarket supermarket = new Supermarket();
            supermarket.ServeCustomers();
        }
    }
    class Product
    {
        public string Label { get; private set; }
        public int Price { get; private set; }

        public Product(string label, int price)
        {
            Label = label;
            Price = price;
        }
    }

    class Customer
    {
        private List<Product> _basket;
        private int _money;

        public Customer(List<Product> basket, int money)
        {
            _basket = basket;
            _money = money;
        }

        public void LayOutProducts()
        {
            int sum = CalculateSum();
            bool enoughMoney = sum < _money;

            if (enoughMoney == true)
            {
                Console.WriteLine($"У поситителя {_money} денег. Его покупка на {sum} и он ее оплачивает");
            }
            else
            {
                int tempSum = sum;
                Console.WriteLine($"У поситителя {_money} денег. Его покупка на {sum}. Ему не хватает {sum - _money}");
                RemoveProducts(sum);
                sum = CalculateSum();
                Console.WriteLine($"Поситителю пришлось оставить товаров на {tempSum - sum}");
            }

            Pay(sum);
            Console.WriteLine($"У поситителя осталось {_money} денег.");

        }

        public int CalculateSum()
        {
            int sum = 0;

            foreach (var product in _basket)
            {
                sum += product.Price;
            }

            return sum;
        }

        private void RemoveProducts(int sum)
        {
            Random random = new Random();

            while (sum >= _money)
            {
                int randomIndex = random.Next(0, _basket.Count);

                sum -= _basket[randomIndex].Price;
                _basket.RemoveAt(randomIndex);
            }
        }

        private void Pay(int sum)
        {
            _money -= sum;
        }
    }

    class Supermarket
    {
        List<Product> _products;
        List<Customer> _customers;

        public Supermarket()
        {
            _products = new List<Product>
         {
                new Product("a",20),
                new Product("b",40),
                new Product("c",60),
                new Product("d",80),
                new Product("e",100),
                new Product("f",120),
         };

            _customers = new List<Customer>
         {
                new Customer(new List<Product>{_products[0],_products[1],_products[0]},79),
                new Customer(new List<Product>{_products[2],_products[3],_products[5]},265),
                new Customer(new List<Product>{_products[2],_products[3],_products[5]},255),
                new Customer(new List<Product>{_products[0],_products[3],_products[5]},210),
         };
        }
        public void ServeCustomers()
        {
            foreach (var customer in _customers)
            {
                customer.LayOutProducts();
                Console.ReadKey();
                Console.Clear();
            }
        }
    }

}