ДЗ: Магазин

gistfile1.txt

using System;
using System.Collections;
using System.Collections.Generic;
using System.ComponentModel;
using System.Diagnostics.Contracts;
using System.Reflection;
using System.Runtime.CompilerServices;
using System.Security.Cryptography;
using static System.Reflection.Metadata.BlobBuilder;

namespace store
{
    internal class Program
    {
        static void Main(string[] args)
        {
            Buyer buyer = new Buyer("Артур", 1500, new List<string> { "Сыр", "Армия клонов", "Машина", "Хлеб", "Мясо", "Луноход" });

            Seller seller = new Seller("Иван", 30, new List<Commodity>{
                new Commodity("Курица", 240, "Куриное феле 1 килограмм"),
                new Commodity("Хлеб", 60, "Батон 200 грамм"),
                new Commodity("Книга", 840, "\"Мёртвые души\" том 2"),
                new Commodity("Мясо", 400, "Стэйки, 500 грамм"),
                new Commodity("Машина", 8800, "Игрушка на радиоуправлении"),
                new Commodity("Сыр", 475, "Голландский (контрабанда)")
            });

            buyer.ShowMoney();
            seller.ShowMoney();

            seller.ShowCommodities();

            buyer.ShowShoppingList();

            seller.Sell(buyer);

            buyer.ShowCommodities();

            buyer.ShowMoney();
            seller.ShowMoney();
        }
    }

    class Person
    {
        protected int _money;

        protected List<Commodity> _commodities;

        public Person(string name, List<Commodity> commodity, int money)
        {
            _commodities = commodity;

            Name = name;

            if (money < 0)
            {
                _money = 0;
            }
            else
            {
                _money = money;
            }
        }

        public Person(string name, int money)
        {
            _commodities = new List<Commodity>();

            Name = name;

            _money = money;
        }

        public string Name { get; private set; }

        public void ShowMoney()
        {
            Console.WriteLine($"{Name} обладает суммой в {_money} денег");
        }

        public virtual void ShowCommodities()
        {
            Console.WriteLine($"Вот что имеет {Name}\n");
        }

        protected void ShowSeparator()
        {
            Console.WriteLine("\n" + new String('-', 40) + "\n");
        }
    }

    class Seller : Person
    {
        public Seller(string name, int money, List<Commodity> commodity) : base(name, commodity, money) { }

        public void Sell(Buyer buyer)
        {
            foreach (String product in buyer.ShoppingList)
            {
                if (FindProduct(product, out int indexProduct))
                {
                    if (buyer.CheckSolvency(_commodities[indexProduct].Price))
                    {
                        _money += buyer.Buy(_commodities[indexProduct]);

                        _commodities.RemoveAt(indexProduct);
                    }
                }
            }

        }

        public override void ShowCommodities()
        {
            Console.WriteLine("\nОбратите внимание на прилавок");

            ShowSeparator();

            foreach (Commodity comodity in _commodities)
                Console.WriteLine($"{comodity.Name} - {comodity.Price} денег");

            ShowSeparator();
        }

        private bool FindProduct(string product, out int indexProduct)
        {
            indexProduct = 0;

            for (int index = 0; index < _commodities.Count; index++)
            {
                if (_commodities[index].Name == product)
                {
                    Console.WriteLine($"- {product} стоит {_commodities[index].Price} денег");

                    indexProduct = index;

                    return true;
                }
            }

            Console.WriteLine($"- {product} сейчас отсутствует, но скоро будет привоз\n");

            return false;
        }
    }

    class Buyer : Person
    {
        private int _moneyToPay;

        public Buyer(string name, int money, List<string> shoppingList) : base(name, money)
        {
            ShoppingList = shoppingList;

            _moneyToPay = 0;
        }

        public List<string> ShoppingList { get; private set; }

        public void ShowShoppingList()
        {
            Console.Write($"\n{Name} Хочет приобрести:\n| ");

            foreach (String purchase in ShoppingList)
            {
                Console.Write(" " + purchase + " |");
            }
            Console.WriteLine("\n");
        }

        public int Buy(Commodity commodity)
        {
            _money -= _moneyToPay;

            _commodities.Add(commodity);

            return _moneyToPay;
        }

        public bool CheckSolvency(int price)
        {
            if (price >= 0 && _money > price)
            {
                Console.WriteLine("- Мне по карману, упакуйте пожалуйста\n");

                _moneyToPay = price;

                return true;
            }

            Console.WriteLine("- Это очень дорого..\n");

            _moneyToPay = 0;

            return false;
        }

        public override void ShowCommodities()
        {
            base.ShowCommodities();

            ShowSeparator();

            foreach (Commodity comodity in _commodities)
                Console.WriteLine($"{comodity.Name} - {comodity.Description}");

            ShowSeparator();
        }

    }

    class Commodity
    {
        public Commodity(string name, int price, string description)
        {
            Name = name;
            Price = price;
            Description = description;
        }

        public int Price { get; private set; }

        public string Name { get; private set; }
        public string Description { get; private set; }
    }
}