using System;
using System.Collections.Generic;

namespace Zamestitel
{

    public interface ICustomer
    {
        void Request();
    }
    class RealCustomer : ICustomer
    {
        private string firstname = "Denis";
        private string lastname = "Smirnov";
        private int age = 20;
        public string[] ShopList = new string[5] { "car", "bread", "milk", "moto", "lemon" };
        Queue<string> ShopBasket = new Queue<string>();

        private void AddToShopBasket()
        {
            string product = Console.ReadLine();
            while (product != "stop")
            {
                ShopBasket.Enqueue(product);
                product = Console.ReadLine();
            }
        }
        private void ShowShopBasket()
        {
            foreach( string list in ShopBasket)
            {
                Console.WriteLine(list);
            }
        }
        public void Request()
        {
            Console.WriteLine("1.Добавить в корзину товары");
            Console.WriteLine("2.Посмотреть корзину");
            Console.WriteLine("3.Личный кабинет");
            Console.WriteLine("4.Выйти");
            int number = Convert.ToInt32(Console.ReadLine());
            if (number == 1)
            {
                Console.WriteLine("Введите название товаров, которые вы хотите добавить в корзину(Для отмены введите stop)");
                AddToShopBasket();
                this.Request();
            }
            else if (number == 2)
            {
                Console.WriteLine("В корзине: ");
                ShowShopBasket();
                this.Request();
            }
            else if(number == 3)
            {
                Console.WriteLine(firstname);
                Console.WriteLine(lastname);
                Console.WriteLine(age);
                this.Request();
            }
            else if(number == 4)
            {
                Environment.Exit(0);
            }
        }

    }
    class ProxyCustomer : ICustomer
    {

        private RealCustomer _realCustomer;
        public string password = "test";
        public string[] ShopList = new string[5] { "car", "bread", "milk", "moto", "lemon" };

        private void ShowShopList()
        {
            for(int i = 0; i < 5; i++)
            {
                Console.WriteLine(ShopList[i]);
            }
        }
        private void Authenticate(string passwd)
        {
            if (password == passwd)
            {
                Console.WriteLine("Вы успешно зашли");
                this._realCustomer = new RealCustomer();
            }
            else Console.WriteLine("Повторите попытку");
        }
        public void Request()
        {
            if(this.CheckAcces())
            {
                this._realCustomer.Request();
            }
            else
            {
                Console.WriteLine("1.Посмотреть список товаров");
                Console.WriteLine("2.Авторизоваться");
                int number = Convert.ToInt32(Console.ReadLine());
                if(number == 1)
                {
                    ShowShopList();
                    Request();
                }
                if(number == 2)
                {
                    Console.WriteLine("Введите пароль");
                    string passwd = Console.ReadLine();
                    Authenticate(passwd);
                    Request();
                }
            }
        }
        public bool CheckAcces()
        {
            if (_realCustomer == null)
            {
                return false;
            }
            else return true;
        }
    }
    class Client
    {
        public void ClientCode(ICustomer customer)
        {
            customer.Request();
        }
    }


    class Program
    {
        static void Main(string[] args)
        {
            Client client = new Client();
            ProxyCustomer proxyCustomer = new ProxyCustomer();
            client.ClientCode(proxyCustomer);

        }
    }
}