shop.cs

using System;
using System.Collections.Generic;

namespace maaaa
{
    public class Item
    {
        public string Name { get; set; }
        public double Priec { get; set; }
        public int Index { get; set; }
    }


    public class Stock : Item
    {
        public int StockValue { get; set; }
        
        public void AddToStock(int numberOfItem)
        {
            StockValue += numberOfItem;
        }
        public bool RemoveFromStock(int numberOfItem)
        {
            if (StockValue >= numberOfItem)
            {
                StockValue -= numberOfItem;
                return true;
            }

            return false;
        }
    }


    public class Shop
    {
        private Dictionary <int, Stock> _stock = new Dictionary <int, Stock>();

        public Dictionary <int, Stock>  GetStockState()
        {                   
            return _stock;
        }

        public bool AddNewItem(Item product, int amount)
        {
            if(_stock.ContainsKey(product.Index)){
                return false;
            }

            int newKey = _stock.Count+1;

            Stock newItem = new Stock{
                StockValue = amount,
                Name = product.Name,
                Index = newKey,
                Priec = product.Priec
            };

            _stock.Add(newKey, newItem);
            return false;
        
        }

        public bool SellItem(Item product, int Amount)
        {
            return false;
        }

    }








}