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();
}
}