Shop tempVer

using System;

namespace Clight_25_OOP_Shop
{
	class Program
	{
		static void Main(string[] args)
		{
			int numProductsInRow = 3;
			int step = 25;
			int ySecondRow = 12;
			int xSecondRow = 30;
			int yCheckMenu = 5;
			int yShowProducts = 8;
			int buyerWallet = 10000;

			Product tomato = new Product("Помидоры", 15, 250);
			Product cucumber = new Product("Огурцы", 15, 200);
			Product potato = new Product("Картофель", 20, 100);
			Product orange = new Product("Апельсин", 7, 350);
			Product aplle = new Product("Яблоки", 13, 150);
			Product kiwi = new Product("Киви", 5, 300);

			Shop vegetableShop = new Shop("Овощной", new Product[] { tomato, cucumber, potato, orange, kiwi, aplle }, 0);

			string name = "Покупатель";
			Buyer buyer = new Buyer(name, new Product[0], buyerWallet);

			while (true)
			{
				Console.CursorVisible = false;
				Console.WriteLine($"Добро пожаловать в магазин \"{vegetableShop.GetName()}\"\n\n");
				Console.WriteLine("Выберете действие:\n");
				Console.WriteLine("F1 - Зайти в магазин");
				Console.WriteLine("F2 - Посмотреть свои покупки");
				Console.WriteLine("F5 - Выйти");

				ConsoleKeyInfo key = Console.ReadKey();
				switch (key.Key)
				{
					case ConsoleKey.F1:

						bool inShop = true;
						while (inShop)
						{
							Console.Clear();
							Console.WriteLine("Выберете действие:\n");
							Console.WriteLine("F1 - Совершить покупку");
							Console.WriteLine("F5 - Назад");

							Console.SetCursorPosition(50, 0);
							Console.WriteLine($"Ваш кошелек: {buyer.GetWallet()}");

							Console.SetCursorPosition(0, ySecondRow - 2);
							Console.WriteLine("Прилавок магазина:\n");
							vegetableShop.ShowProducts(0, ySecondRow, numProductsInRow, step);

							Console.SetCursorPosition(2 * xSecondRow, ySecondRow - 2);
							Console.WriteLine("Ваши покупки:\n");
							buyer.ShowProducts(2 * xSecondRow, ySecondRow, numProductsInRow, step);

							ConsoleKeyInfo keyShop = Console.ReadKey();
							switch (keyShop.Key)
							{
								case ConsoleKey.F1:

									int currentCost;
									int userProduct = CheckUserInput(vegetableShop.GetProducts(), yCheckMenu);
									int userQuantity = CheckUserInput(vegetableShop.GetProducts(), yCheckMenu, userProduct, out currentCost);

									bool checkUserBuyPossible = CheckUserInput(vegetableShop.GetProducts(), yCheckMenu, userProduct, userQuantity, currentCost);

									if (checkUserBuyPossible)
									{
										bool goodShopingBuyer = false;
										bool goodShopingShop = false;
										Product[] currentPurchase = new Product[0];

										buyer.DoShoping(vegetableShop.GetProducts(), userProduct, userQuantity);
										vegetableShop.DoShoping(vegetableShop.GetProducts(), userProduct, userQuantity);

										if (goodShopingBuyer && goodShopingShop)
										{
											Console.WriteLine("Покупка успешно совершена.");
										}
										else
										{
											Console.WriteLine("Покупка не прошла");
										}
									}
									else
									{
										Console.SetCursorPosition(0, yCheckMenu + 1);
										Console.WriteLine($"У вас недостаточно средств для этой покупки. " +
											$"Не хватает {(vegetableShop.GetPrice(userProduct) * userQuantity) - buyer.GetWallet()} руб.");
										Console.ReadKey();
										Console.SetCursorPosition(0, yCheckMenu);
										Console.WriteLine("                                                     ");
										Console.WriteLine("                                                     ");
									}
									break;

								case ConsoleKey.F5:
									inShop = false;
									break;
							}
						}
						break;

					case ConsoleKey.F2:
						Console.SetCursorPosition(0, ySecondRow - 2);
						Console.WriteLine("Ваши покупки:\n");
						buyer.ShowProducts(0, ySecondRow, numProductsInRow, step);
						break;

					case ConsoleKey.F5:
						Console.WriteLine("\n\nПриходите еще!");
						Console.ReadKey();
						Environment.Exit(0);
						break;
				}
				Console.Clear();
			}
		}
		static int CheckUserInput(Product[] products, int yCheckMenu)
		{
			bool checkUserInput;
			bool checkInput = true;
			int input = 0;

			while (checkInput)
			{
				Console.SetCursorPosition(0, yCheckMenu);
				Console.Write($"Выберите номер продукта (1 - {products.Length}):");
				string userInput = Console.ReadLine();

				checkUserInput = Int32.TryParse(userInput, out int value);

				if (checkUserInput && value <= products.Length && value > 0)
				{
					input = value;
					checkInput = false;
				}
				else
				{
					Console.SetCursorPosition(0, yCheckMenu + 1);
					Console.WriteLine("Введите корректное число.");
					Console.ReadKey();
					Console.SetCursorPosition(0, yCheckMenu);
					Console.WriteLine("                                                     ");
					Console.WriteLine("                                                     ");
				}
			}
			return input;
		}
		static int CheckUserInput(Product[] products, int yCheckMenu, int num, out int currentCost)
		{
			bool checkUserInput;
			bool checkInput = true;
			int input = 0;

			while (checkInput)
			{
				Console.SetCursorPosition(0, yCheckMenu);
				Console.Write($"Выберите количество товара (1 - {products[num - 1]._quantity}):");
				string userInput = Console.ReadLine();

				checkUserInput = Int32.TryParse(userInput, out int value);

				if (checkUserInput && value <= products[num - 1]._quantity && value > 0)
				{
					input = value;
					checkInput = false;
				}
				else
				{
					Console.SetCursorPosition(0, yCheckMenu + 1);
					Console.WriteLine("Введите корректное число.");
					Console.ReadKey();
					Console.SetCursorPosition(0, yCheckMenu);
					Console.WriteLine("                                                     ");
					Console.WriteLine("                                                     ");
				}
			}
			currentCost = products[num - 1]._price * input;
			return input;
		}

		static bool CheckUserInput(Product[] products, int yCheckMenu, int num, int quantity, int currentWallet)
		{
			bool checkUserInput;

			if (currentWallet >= quantity * products[num - 1]._price)
			{
				currentWallet = quantity * products[num - 1]._price;
				checkUserInput = true;
				return checkUserInput;
			}
			else
			{
				checkUserInput = false;
				return checkUserInput;
			}
		}
	}


	interface IShoping
	{
		bool DoShoping(Product[] products, int num, int quantity);
	}

	class Dealer
	{
		protected string _name;
		protected Product[] _products;

		public Dealer(string name, Product[] products)
		{
			_name = name;
			_products = products;
		}

		public void ShowProducts(int x, int y, int numProductsInRow, int step)
		{
			int j = 0;
			int z = 0;
			for (int i = 0; i < _products.Length; i++)
			{
				if (i > 0)
				{
					j++;

					if (j == numProductsInRow)
					{
						j = 0;
						z++;
					}
				}

				Console.SetCursorPosition(x + (z * step), y + (j * 4));
				Console.Write((i + 1) + " ");
				_products[i].ShowProduct(2 + x + (z * step), y + (j * 4));
			}
		}

		public string GetName()
		{
			return _name;
		}

		public int GetQuantity()
		{
			return _products.Length;
		}

		public Product[] GetProducts()
		{
			return _products;
		}

		public int GetPrice(int num)
		{
			int currentPrice = _products[num - 1]._price;
			return currentPrice;
		}

	}
	class Shop : Dealer, IShoping
	{
		protected int _income;

		public Shop(string name, Product[] products, int income) : base(name, products)
		{
			_income = income;
		}

		public bool DoShoping(Product[] products, int num, int quantity)
		{
			bool goodShoping;

			if (_products[num - 1]._quantity > quantity)
			{
				_income += _products[num - 1]._price * quantity;
				_products[num - 1].SubstractQuantity(quantity);

				goodShoping = true;
				return goodShoping;
			}
			else if (_products[num - 1]._quantity == quantity)
			{
				_income += _products[num - 1]._price * quantity;

				Product[] currentProducts = new Product[_products.Length - 1];
				for (int i = 0; i < num - 1; i++)
				{
					currentProducts[i] = _products[i];
				}
				for (int i = num - 1; i < currentProducts.Length; i++)
				{
					currentProducts[i] = _products[i + 1];
				}
				_products = currentProducts;

				goodShoping = true;
				return goodShoping;
			}
			else
			{
				goodShoping = false;
				return goodShoping;
			}
		}
	}

	class Buyer : Dealer, IShoping
	{
		protected int _wallet;

		public Buyer(string name, Product[] products, int wallet) : base(name, products)
		{
			_wallet = wallet;
		}


		public bool DoShoping(Product[] products, int num, int quantity)
		{
			if (_products.Length == 0)
			{

			}
			bool goodShoping = false;
			int j = 0;
			int currentNum = 0;

			for (int i = 0; i < _products.Length; i++)
			{
				if (products[num - 1]._name == _products[i]._name)
				{
					j++;
					currentNum = i;
				}
			}
			if (j > 0)
			{
				_products[currentNum].AddQuantity(quantity);
				_wallet = products[num - 1]._price * quantity;
				goodShoping = true;
			}
			else if (_products.Length == 0)
			{
				Product buyProduct = products[num - 1];
				Product[] currentProducts = new Product[] { products[num - 1] };
				_products = currentProducts;
				_wallet -= buyProduct._price * quantity;
				goodShoping = true;
			}
			else
			{
				Product buyProduct = products[num - 1];
				Product[] currentProducts = new Product[_products.Length + 1];

				for (int i = 0; i < _products.Length; i++)
				{
					currentProducts[i] = _products[i];
				}

				buyProduct.SetQuantity(quantity);
				currentProducts[currentProducts.Length - 1] = buyProduct;
				_products = currentProducts;
				_wallet -= buyProduct._price * quantity;
				goodShoping = true;
			}
			return goodShoping;
		}
		public int GetWallet()
		{
			return _wallet;
		}
	}


	class Product
	{
		public string _name { get; protected set; }
		public int _price { get; protected set; }
		public int _quantity { get; protected set; }

		public Product(string name, int quantity, int price)
		{
			_name = name;
			_price = price;
			_quantity = quantity;
		}

		public void SetQuantity(int quantity)
		{
			_quantity = quantity;
		}
		public void AddQuantity(int quantity)
		{
			_quantity += quantity;
		}
		public void SubstractQuantity(int quantity)
		{
			_quantity -= quantity;
		}

		public void ShowProduct(int x, int y)
		{
			Console.SetCursorPosition(x, y);
			Console.Write($"{_name}");
			Console.SetCursorPosition(x, y + 1);
			Console.Write($"Кол-во: {_quantity} кг");
			Console.SetCursorPosition(x, y + 2);
			Console.Write($"Цена: {_price} руб.");
		}
	}
}