Basic_Task25

using System;
using System.Collections.Generic;

namespace Basic_Task25
{
    class Program
    {
        static string mainMenu = "Меню.\n" +
            "1. Показать товар продавца\n" +
            "2. Посмотреть свои вещи\n" +
            "3. Купить товар\n" +
            "0. Выход\n";
        static void Main(string[] args)
        {
            Trader trader = new Trader();
            Player player = new Player();
            while (true)
            {
                Console.Clear();
                switch (ReadInt(mainMenu))
                {
                    case 1:
                        Console.Clear();
                        trader.ShowProducts();
                        Console.ReadKey();
                        break;
                    case 2:
                        Console.Clear();
                        player.Show();
                        Console.ReadKey();
                        break;
                    case 3:
                        Console.Clear();
                        trader.ShowProducts();
                        int number = -1;

                        while (number < 1 || number > trader.Products.Count)
                        {
                            number = ReadInt("Введите номер товара: ");
                            Console.Clear();
                            if (number < 1 || number > trader.Products.Count)
                            {
                                Console.WriteLine("Введено неверный номер товара");
                            }
                        }

                        if (!player.BuyProduct(trader.SellProduct(number)))
                        {
                            Console.WriteLine("У вас недостаточно монет");
                            Console.ReadKey();
                        }
                        break;
                    case 0:
                        return;
                }
            }
        }

        static int ReadInt(string menu)
        {
            int output = 0;
            string input;

            while (true)
            {
                Console.Write(menu);
                input = Console.ReadLine();
                Console.Clear();

                if (int.TryParse(input, out output))
                {
                    return output;
                }
                else
                {
                    Console.WriteLine("Введено не число, попробуйте еще!");
                }
            }
        }
    }

    class Player
    {
        public List<Product> Products { get; }
        private int Money { get; set; }

        public Player()
        {
            Products = new List<Product>();
            Money = 100;
        }

        public void Show()
        {
            Console.WriteLine($"Монет - {Money}");
            for (int i = 0; i < Products.Count; i++)
            {
                Console.WriteLine($"{i + 1}. {Products[i].Name} - {Products[i].Cost} монет");
            }
        }

        public bool BuyProduct(Product product)
        {
            if (product.Cost <= Money)
            {
                Products.Add(product);
                Money -= product.Cost;
                return true;
            } else
            {
                return false;
            }
        }
    }

    class Trader
    {
        public List<Product> Products { get; }

        public Trader()
        {
            Products = new List<Product>();

            Products.Add(new Product("Золотой медальон", 50));
            Products.Add(new Product("Самоцвет", 75));
            Products.Add(new Product("Железный меч", 20));
            Products.Add(new Product("Паек", 1));
            Products.Add(new Product("Плащ", 10));
        }

        public void ShowProducts()
        {
            for (int i = 0; i < Products.Count; i++)
            {
                Console.WriteLine($"{i + 1}. {Products[i].Name} - {Products[i].Cost} монет");
            }
        }

        public Product SellProduct(int number)
        {
            Product product = Products[number - 1];
            Products.RemoveAt(number - 1);
            return product;
        }
    }

    class Product
    {
        public string Name { get; set; }
        public int Cost { get; set; }

        public Product(string name, int cost)
        {
            Name = name;
            Cost = cost;
        }
    }
}