5.4

using System;
using System.Collections.Generic;
using System.Linq;
using System.Text;
using System.Threading.Tasks;

namespace _3._3
{
    class Program
    {
        static void Main(string[] args)
        {
            Product[] sellerProducts = { new Product("Яблоко", 3, 15), new Product("Молоко", 6, 15), new Product("Хлеб", 5, 15), new Product("Пиво", 15, 15), new Product("Колбаса", 20, 15) };
            Product[] customerProducts = { new Product("Сигареты", 5)};

            Seller seller = new Seller(sellerProducts);
            Customer customer = new Customer(1000, customerProducts);

            bool mainMenu = true, sellerMenu, customerMenu;
            while (mainMenu == true)
            {
                Console.Clear();
                Console.WriteLine("Главное меню");
                Console.WriteLine("\n1. Продавец\n2. Покупатель\n3. Выход");
                Console.Write("\nВаш выбор: ");
                switch (Convert.ToInt32(Console.ReadLine()))
                {
                    case 1:
                        sellerMenu = true;
                        while (sellerMenu == true)
                        {
                            Console.Clear();
                            Console.WriteLine("Меню продавца");
                            Console.WriteLine("\n1. Показать товар\n2. Заполнить склад\n3. Назад");
                            Console.Write("\nВаш выбор: ");
                            switch (Convert.ToInt32(Console.ReadLine()))
                            {
                                case 1:
                                    Console.Clear();
                                    Console.WriteLine("У вас на витрине: ");
                                    seller.ShowAvailability();
                                    Console.ReadKey();
                                    break;
                                case 2:
                                    seller.FillShelf();
                                    ConsoleMessage("Витрины заполнены");
                                    Console.ReadKey();
                                    break;
                                case 3:
                                    sellerMenu = false;
                                    break;
                                default:
                                    ConsoleMessage("Такой пункт меню отсутствует");
                                    break;
                            }
                        }
                        break;
                    case 2:
                        customerMenu = true;
                        while (customerMenu == true)
                        {
                            Console.Clear();
                            Console.WriteLine("Меню покупателя");
                            Console.WriteLine("\nУ вас в кошельке: " + customer.Money + " монет");
                            Console.WriteLine("\n1. Купить товар\n2. Показать содержимое пакета\n3. Назад");
                            Console.Write("\nВаш выбор: ");
                            switch (Convert.ToInt32(Console.ReadLine()))
                            {
                                case 1:
                                    Console.Clear();
                                    Console.WriteLine("На витрине: ");
                                    seller.ShowAvailability();
                                    Console.Write("Название покупаемого продукта: ");
                                    string uiName = Console.ReadLine();
                                    Console.Write("Количество: ");
                                    int uiCount = Convert.ToInt32(Console.ReadLine());
                                    customer.BuyProduct(sellerProducts, uiName, uiCount);
                                    Console.ReadKey();
                                    break;
                                case 2:
                                    Console.Clear();
                                    Console.WriteLine("У вас в пакете: ");
                                    customer.ShowAvailability();
                                    Console.ReadKey();
                                    break;
                                case 3:
                                    customerMenu = false;
                                    break;
                                default:
                                    ConsoleMessage("Такой пункт меню отсутствует");
                                    break;
                            }
                        }
                        break;
                    case 3:
                        mainMenu = false;
                        break;
                    default:
                        ConsoleMessage("Такой пункт меню отсутствует");
                        break;
                }
            }
        }
        static void ConsoleMessage(string message)
        {
            Console.ForegroundColor = ConsoleColor.Red;
            Console.WriteLine(message);
            Console.ResetColor();
            Console.ReadKey();
        }
    }
    class Product
    {
        public string Name;
        public int Price;
        public int Count;
        public int CountOnPackage;
        public Product(string name, int price, int count)
        {
            Name = name;
            Price = price;
            Count = count;
        }
        public Product(string name, int countOnPackage)
        {
            Name = name;
            CountOnPackage = countOnPackage;
        }
    }
    class Seller
    {
        public Product[] ProductsOnShelf;
        public Seller(Product[] productsOnShelf)
        {
            ProductsOnShelf = productsOnShelf;
        }
        public void FillShelf()
        {
            foreach(Product product in ProductsOnShelf)
            {
                product.Count = 15;
            }
        }
        public void ShowAvailability()
        {
            foreach(Product product in ProductsOnShelf)
            {
                Console.WriteLine("\n" + product.Name + " - " + product.Price + " монет" + "\nКоличество: " + product.Count + " штук");
                Console.WriteLine("=============================");
            }
        }
    }
    class Customer
    {
        public int Money;

        public Product[] ProductsOnPackage;
        public Customer(int money, Product[] productsOnPackage)
        {
            Money = money;
            ProductsOnPackage = productsOnPackage;
        }
        public void BuyProduct(Product[] sellerProducts, string product, int countProd)
        {
            for(int i = 0; i < sellerProducts.Length; i++)
            {
                if(product == sellerProducts[i].Name && countProd <= sellerProducts[i].Count && Money >= (sellerProducts[i].Price * countProd))
                {
                    for (int j = 0; j < sellerProducts.Length; j++)
                    {
                        if (product == sellerProducts[j].Name)
                        {
                            Money -= (sellerProducts[j].Price * countProd);
                            sellerProducts[j].Count -= countProd;
                        }
                    }
                    Product newProduct = new Product(product, countProd);
                    Product[] tempBuyProducts = new Product[ProductsOnPackage.Length + 1];
                    for (int j = 0; j < ProductsOnPackage.Length; j++)
                    {
                        tempBuyProducts[j] = ProductsOnPackage[j];
                    }
                    tempBuyProducts[tempBuyProducts.Length - 1] = newProduct;
                    ProductsOnPackage = tempBuyProducts;
                    Console.ForegroundColor = ConsoleColor.Green;
                    Console.WriteLine("\nПокупка прошла успешно");
                    Console.ResetColor();
                }
                else if(product == sellerProducts[i].Name && countProd > sellerProducts[i].Count)
                {
                    Console.ForegroundColor = ConsoleColor.Red;
                    Console.WriteLine("\nНедостаточно продуктов");
                    Console.ResetColor();
                }
                else if (product == sellerProducts[i].Name && Money < (sellerProducts[i].Price * countProd))
                {
                    Console.ForegroundColor = ConsoleColor.Red;
                    Console.WriteLine("\nНедостаточно монет");
                    Console.ResetColor();
                }
            }
        }
        public void ShowAvailability()
        {
            foreach (Product product in ProductsOnPackage)
            {
                Console.WriteLine("\n" + product.Name + " - " + product.CountOnPackage + " штук");
                Console.WriteLine("=============================");
            }
        }
    }
}