Unit_42

using System;
using System.Collections.Generic;

namespace Ijunior
{
    internal class Program
    {
        static void Main(string[] args)
        {
            Shop shop = new Shop();
            shop.Work();
        }
    }

    class Shop
    {
        private Seller _seller;
        private Сustomer _customer;

        public Shop()
        {
            _seller = new Seller();
            _customer = new Сustomer();
        }

        public void Work()
        {
            const string CommandShowSellerInfo = "1";
            const string CommandShowСustomerInfo = "2";
            const string CommandTrade = "3";
            const string CommandExit = "4";

            bool isWork = true;

            while (isWork)
            {
                Console.Write($"{CommandShowSellerInfo} - показать товары и баланс продавца" +
                    $"\n{CommandShowСustomerInfo} - показать товары и баланс покупателя" +
                    $"\n{CommandTrade} - купить товары" +
                    $"\n{CommandExit} - выйти из программы" +
                    $"\nВведите номер: ");

                switch (Console.ReadLine())
                {
                    case CommandShowSellerInfo:
                        _seller.ShowInfo();
                        break;

                    case CommandShowСustomerInfo:
                        _customer.ShowInfo();
                        break;

                    case CommandTrade:
                        Trade();
                        break;

                    case CommandExit:
                        isWork = false;
                        break;

                    default:
                        Console.WriteLine("Некорректный ввод");
                        break;
                }

                Console.ReadKey();
                Console.Clear();
            }
        }

        private void Trade()
        {
            _seller.ShowProducts();

            Console.Write("Введите товар для покупки: ");

            if (_seller.TryGetProduct(Console.ReadLine(), out Product product))
            {
                if (_customer.IsMoneyEnough(product.Price))
                {
                    _seller.SellProduct(product);
                    _customer.BuyProduct(product);
                    Console.WriteLine("Товар куплен");
                }
                else
                {
                    Console.WriteLine("У покупателя недостаточно денег");
                }
            }
            else
            {
                Console.WriteLine("Такого товара нет");
            }
        }
    }

    class Person
    {
        protected List<Product> Products;
        protected int Money;

        public void ShowInfo()
        {
            ShowBalance();
            Console.WriteLine();
            ShowProducts();
        }

        public void ShowProducts()
        {
            if (Products.Count > 0)
            {
                foreach (var product in Products)
                {
                    product.ShowInfo();
                }
            }
            else
            {
                Console.WriteLine("Список пуст");
            }
        }

        private void ShowBalance()
        {
            string separator = new string('-', 10);

            Console.WriteLine($"{separator} \nБаланс: {Money} \n{separator}");
        }
    }

    class Seller : Person
    {
        public Seller()
        {
            Money = 0;
            FillList();
        }

        public bool TryGetProduct(string name, out Product foundProduct)
        {
            foundProduct = null;

            foreach (var product in Products)
            {
                if (product.Name.ToLower() == name.ToLower())
                {
                    foundProduct = product;
                    return true;
                }
            }

            return false;
        }

        public void SellProduct(Product product)
        {
            Money += product.Price;
            Products.Remove(product);
        }

        private void FillList()
        {
            Products = new List<Product>();
            int minRandomNumber = 10;
            int maxRandomNumber = 100;

            List<string> names = new List<string>()
            { "яблоко", "банан", "груша", "манго", "слива",
              "помидор", "огурец", "кабачок", "редис", "картофель",
              "клубника", "голубика", "черника", "вишня", "ежевика"};

            for (int i = 0; i < names.Count; i++)
            {
                Products.Add(new Product(names[i], Utils.GetRandomNumber(minRandomNumber, maxRandomNumber)));
            }
        }
    }

    class Сustomer : Person
    {
        public Сustomer()
        {
            Products = new List<Product>();
            Money = GetRandomMoney();
        }

        public bool IsMoneyEnough(int price)
        {
            if (Money >= price)
                return true;

            return false;
        }

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

            if (product != null)
                Products.Add(product);

        }

        private int GetRandomMoney()
        {
            int minRandomNumber = 100;
            int maxRandomNumber = 500;

            return Utils.GetRandomNumber(minRandomNumber, maxRandomNumber);
        }
    }

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

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

        public void ShowInfo()
        {
            Console.WriteLine($"{Name} - {Price} рублей");
        }
    }

    class Utils
    {
        private static Random s_random = new Random();

        public static int GetRandomNumber(int minValue, int maxValue)
        {
            return s_random.Next(minValue, maxValue);
        }
    }
}