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

using Ninject;

namespace NinjectDemo
{
    class Program
    {
        static void Main(string[] args)
        {
            IKernel ninjectKernel = new StandardKernel();
            ninjectKernel.Bind<IValueCalculator>()
                .To<LinqValueCalculator>();
            ninjectKernel.Bind<IDiscountHelper>()
                .To<DefaultDiscountHelper>()
                .WithPropertyValue("DiscountSize", 50M);
            
            // get the interface implementation
            IValueCalculator calcImp1 = ninjectKernel.Get<IValueCalculator>();
            // create the instance of ShoppingCart and inject the dependency
            ShoppingCart cart = new ShoppingCart(calcImp1);
            // perform the calculation and write out the result
            Console.WriteLine("Total: {0:c}", cart.CalculateStockValue());
        }
    }

    public interface IDiscountHelper
    {
        decimal ApplyDiscount(decimal totalParam);
    }

    public class DefaultDiscountHelper : IDiscountHelper
    {
        private decimal discountRate;

        public DefaultDiscountHelper(decimal discountParam)
        {
            discountRate = discountParam;
        }
        
        public decimal ApplyDiscount(decimal totalParam)
        {
            return (totalParam - (discountRate / 100m * totalParam));
        }
    }
}