using System;
using System.Collections.Generic;
using System.Drawing;
using System.Reflection;

internal class Program
{
    static void Main(string[] args)
    {
        Shop shop = new Shop();

        shop.Work();
    }
}

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

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

    public override string ToString()
    {
        return $"{Name}. Цена: {Price} руб.";
    }
}

public class Person
{
    protected List<Product> _products;

    public Person(int money, string role)
    {
        Money = money;
        Role = role;
    }

    public string Role { get; private set; }
    public int Money { get; protected set; }

    public void ShowInfo()
    {
        Console.WriteLine($"{Role}. Денег: {Money} руб.\n\nТовары: ");

        if (_products.Count > 0)
        {
            foreach (Product product in _products)
            {
                Console.WriteLine(product);
            }
        }
        else
        {
            Console.WriteLine("Пусто.");
        }

        Console.ReadKey();
    }
}

public class Seller : Person
{
    public Seller(int money, string role) : base(money, role)
    {
        _products = new List<Product>
        {
            new Product("Яблоко", 50),
            new Product("Банан", 40),
            new Product("Молоко", 80),
            new Product("Хлеб", 30),
            new Product("Сыр", 150),
            new Product("Колбаса", 200),
            new Product("Шоколад", 100),
            new Product("Кофе", 300),
            new Product("Чай", 120),
            new Product("Яйца", 90)
        };
    }

    public bool CanSell(out Product product, Buyer buyer)
    {
        product = SetProduct();

        if (buyer.CanAfford(product))
            return true;
        else return false;
    }

    public void AddMoney(int money)
    {
        Money += money;
    }

    private Product SetProduct()
    {
        Random random = new Random();

        return _products[random.Next(_products.Count)];
    }
}

public class Buyer : Person
{
    public Buyer(int money, string role) : base(money, role)
    {
        _products = new List<Product>();
    }

    public void Buy(Product product)
    {
        Money -= product.Price;

        _products.Add(product);
    }

    public bool CanAfford(Product product)
    {
        return Money >= product.Price;
    }
}

public class Shop
{
    private Seller _seller = new Seller(10000, "Продавец");
    private Buyer _buyer = new Buyer(1000, "Покупатель");

    public void Work()
    {
        const string CommandShowInfoSeller = "1";
        const string CommandSellInfoBuyer = "2";
        const string CommandConductSale = "3";
        const string CommandExit = "Exit";

        bool isRun = true;

        

        while (isRun)
        {

            Console.Clear();
            Console.WriteLine($"{CommandShowInfoSeller} - Информация о продавце.\n" +
            $"{CommandSellInfoBuyer} - Информация о покупателе.\n" +
            $"{CommandConductSale} - Провести продажу.\n" +
            $"{CommandExit} - Выход.");

            switch (Console.ReadLine())
            {
                case CommandShowInfoSeller:
                    ShowInfoSeller();
                    break;

                case CommandSellInfoBuyer:
                    ShowInfoBuyer();
                    break;

                case CommandConductSale:
                    ConductSale();
                    break;

                case CommandExit:
                    isRun = false;
                    break;

                default:
                    Console.WriteLine("Ошибка ввода");
                    Console.ReadKey();
                    break;
            }
        }

        Console.WriteLine("Программа завершена.");
        Console.ReadKey();
    }

    private void ConductSale()
    {
        if (_seller.CanSell(out Product product, _buyer))
        {
            _seller.AddMoney(product.Price);
            _buyer.Buy(product);

            Console.WriteLine($"{_buyer.Role} купил {product.Name}.");
            Console.ReadKey();
        }
        else
        {
            Console.WriteLine($"У {_buyer.Role} не достаточно денег.");
            Console.ReadKey();
        }
    }

    private void ShowInfoSeller()
    {
        _seller.ShowInfo();
    }

    private void ShowInfoBuyer()
    {
        _buyer.ShowInfo();
    }
}