using System;

using System.Collections.Generic;

using System.Linq;

using System.Text;

using System.Threading.Tasks;

​

namespace Car

{

    class Program

    {

        static void Main(string[] args)

        {

            //pre-define options

            var v8Option = new BaseCarOption()

            {

                OptionType = "V8 Engine",

                Price = 5000

            };

​

            var leatherSeatsOption = new BaseCarOption()

            {

                OptionType = "Leather Seats",

                Price = 500

            };

​

            var carWithOutOptionSpecificClasses = new Car

            {

                Year = 2020,

                Make = "Chevrolet",

                Model = "Corvette",

                BasePrice = 60000,

                Options = new List<BaseCarOption>

                {

                    v8Option,

                    leatherSeatsOption

                }

            };

​

            var lannasCorvette = new Car

            {

                Year = 2020,

                Make = "Chevrolet",

                Model = "Corvette",

                BasePrice = 60000,

                Options = new List<BaseCarOption>

                {

                    new V8Option(),

                    new LeatherSeatsOption()

                }

            };

​

            var stevesGrandCherokee = new Car

            {

                Year = 2019,

                Make = "Jeep",

                Model = "Grand Cherokee",

                BasePrice = 45000,

                Options = new List<BaseCarOption>

                {

                    new V6Option(),

                    new LeatherSeatsOption(),

                    new SunRoofOption()

                }

            };

​

            Console.WriteLine($"Lanna just bought a new {lannasCorvette.Year} {lannasCorvette.Make} {lannasCorvette.Model} and it costed her ${lannasCorvette.TotalPrice}");

​

            Console.WriteLine($"Here is another example without option specific classes\nLanna just bought a new {carWithOutOptionSpecificClasses.Year} {carWithOutOptionSpecificClasses.Make} {carWithOutOptionSpecificClasses.Model} and it costed her ${carWithOutOptionSpecificClasses.TotalPrice}");

​

            Console.Write($"Steve just bought a new {stevesGrandCherokee.Year} {stevesGrandCherokee.Make} {stevesGrandCherokee.Model} and it costed him ${stevesGrandCherokee.TotalPrice}");

        }

    }

​

    public class Car

    {

        public int Year { get; set; }

        public string Make { get; set; }

        public string Model { get; set; }

​

        public double BasePrice { get; set; }

​

        public double TotalPrice {

            get

            {

                return BasePrice + Options.Sum(x => x.Price);

            }

        }

        public List<BaseCarOption> Options { get; set; }

    }

​

    public class BaseCarOption

    {

        public string OptionType { get; set; }

​

        public double Price { get; set;}

    }

​

    public class V8Option : BaseCarOption

    {

        public V8Option()

        {

            OptionType = "V8 Engine";

            Price = 5000;

        }

    }

​

    public class V6Option : BaseCarOption

    {

        public V6Option()

        {

            OptionType = "V6 Engine";

            Price = 3000;

        }

    }

​

    public class SunRoofOption : BaseCarOption

    {

        public SunRoofOption()

        {

            OptionType = "Sun Roof";

            Price = 999;

        }

    }

​

    public class LeatherSeatsOption : BaseCarOption

    {

        public LeatherSeatsOption()

        {

            OptionType = "Leather Seats";

            Price = 500;

        }

    }

}

​