Shop

using System;
using System.Collections.Generic;
using System.Text;

namespace Shop
{
    class Shop
    {
        //полета
        private Dictionary<string, Product> availableProducts;

        //методи
        public Shop()
        {
            availableProducts = new Dictionary<string, Product>();
        }

        public Dictionary<string, Product> AvailableProducts
        {
            get
            {
                return availableProducts;
            }

            set
            {
                availableProducts = value;
            }
        }

        //sell
        public void Sell(string code, double quantity)
        {
            if (availableProducts.ContainsKey(code))
            {
                //имам продукта
                Product product = availableProducts[code];
                if(product.Quantity >= quantity)
                {
                    //имаме количество
                    product.Quantity = product.Quantity - quantity;
                    availableProducts[code] = product;
                }
                else
                {
                    //нямаме количество
                    throw new Exception("Not enough quantity.");
                }
            }
            else
            {
                //нямам продукта
                throw new Exception("Not available product.");
            }
        }

        public void Add (string code, string name, double price, double quantity)
        {
            if (availableProducts.ContainsKey(code))
            {
                //имаме го вече
                Product product = new Product(name, code, price, quantity);
                availableProducts[code] = product;
            }
            else
            {
                //нямаме го и трябва да добавим нов продукт
                Product product = new Product(name, code, price, quantity);
                availableProducts.Add(code, product);
            }
        }

        public void Update (string code, double quantity)
        {
            if (availableProducts.ContainsKey(code))
            {
                //имам наличен продукта
                Product product = availableProducts[code];
                product.Quantity = product.Quantity + quantity;
                availableProducts[code] = product;

            }
            else
            {
                //нямам наличен продукта
                throw new Exception("Please add your product first!");
            }
        }

        public void Print()
        {
            foreach (var pair in availableProducts)
            {
                Product product = pair.Value;
                Console.WriteLine($"Product name: {product.Name}, Code: {product.Code}, " +
                    $"Price: {product.Price}, Quantity: {product.Quantity}");
            }
        }

        public double Calculate()
        {
            double sum = 0;

            foreach(var pair in availableProducts)
            {
                Product product = pair.Value;
                sum += product.Quantity * product.Price;
            }

            return sum;
        }


    }
}