using System;

using System.IO;

using System.Text;

        public class Program

    {

​

​

        public static void Main()

        {

            Customer[] objCustomer = new Customer[2];

            FillData(objCustomer);

            new PrintOrders().PrintOrder(objCustomer);

​

        }

​

​

        public static void FillData(Customer[] objCustomer)

        {

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​

            //First Customer

            objCustomer[0] = new Customer("Salma", "habib");

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            objCustomer[0].CustomerOrder[0] = new Order(new Motocycle(2, "ATK 450 Enduro 2008", 48, 25, 40), 4200, 1);

​

​

​

            objCustomer[1] = new Customer("Jo", "Je");

​

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            objCustomer[1].CustomerOrder[0] = new Order(new Automobiles(2, "BMW R1 1500 2015", 50, 20, 40, 70), 5200, 1);

​

​

        }

​

    }

​

    public class Customer 

    {

        public Customer(string fName, string lName)

        {

            CustommerFirstName1 = fName;

            CustomerLastName1 = lName;

​

        }

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        public string CustommerFirstName1 { get; set; }

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        public string CustomerLastName1 { get; set; }

​

        public Order[] CustomerOrder = new Order[3];

    }

    public class Order

    {

        public Order(IVehicle iv, decimal price, int qty)

        {

            OrderDesc = iv;

            OrderPrice = price;

            OrderQty = qty;

​

        }

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        public IVehicle OrderDesc { get; set; }

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        public decimal OrderPrice { get; set; }

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        public int OrderQty { get; set; }

    }

    public interface IVehicle

    {

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        int NumOfWheels { get; set; }

        string Description { get; set; }

        double HoursePower { get; set; }

        double CargoCapacity { get; set; }

​

​

    }

    class Motocycle : IVehicle

    {

        public Motocycle(int numOfWheel, string des, double hpower, double radius, double height)

        {

            _numOfWheels = numOfWheel;

            _description = des;

            _hoursePower = hpower;

            Radius = radius;

            Height = height;

​

        }

        const double Pi = 3.141592653589793238462643;

        int _numOfWheels;

​

        int IVehicle.NumOfWheels

        {

            get { return _numOfWheels; }

            set { _numOfWheels = value; }

        }

​

        string _description;

        string IVehicle.Description

        {

            get { return _description; }

            set { _description = value; }

        }

​

        double _hoursePower;

        double IVehicle.HoursePower

        {

            get { return _hoursePower; }

            set { _hoursePower = value; }

        }

​

        public double Radius { get; set; }

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        public double Height { get; set; }

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        private double _cargoCapacity;

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        public double CargoCapacity

        {

            get { return (Pi * (Radius * Radius) * Height) * 2; }

            set { _cargoCapacity = value; }

        }

​

​

​

​

​

    }

    class Automobiles : IVehicle

    {

        public Automobiles(int numOfWheel, string des, double hpower, double width, double height, double length)

        {

            _numOfWheels = numOfWheel;

            _description = des;

            _hoursePower = hpower;

            Width = width;

            Height = height;

            Length = length;

​

        }

        int _numOfWheels;

​

        int IVehicle.NumOfWheels

        {

            get { return _numOfWheels; }

            set { _numOfWheels = value; }

        }

​

        string _description;

        string IVehicle.Description

        {

            get { return _description; }

            set { _description = value; }

        }

​

        double _hoursePower;

        double IVehicle.HoursePower

        {

            get { return _hoursePower; }

            set { _hoursePower = value; }

        }

​

        public double Width { get; set; }

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        public double Length { get; set; }

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        public double Height { get; set; }

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        private double _cargoCapacity;

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        public double CargoCapacity

        {

            get { return (Length * Width * Height); }

            set { _cargoCapacity = value; }

        }

​

​

​

​

​

    }

    interface IPrintOrders

    {

        void PrintOrder(Customer[] cust);

    }

​

    public class PrintOrders : IPrintOrders

    {

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        public void PrintOrder(Customer[] cust)

        {

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​

​

            StringBuilder sb = new StringBuilder();

            foreach (var custItem in cust)

            {

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                sb.AppendLine($"Customer Name :{custItem.CustommerFirstName1} {custItem.CustomerLastName1}");

                sb.AppendLine(" Orders : ");

                foreach (var item in custItem.CustomerOrder)

                {

                    if (item != null)

                    {

                        sb.AppendLine($"Description : {item.OrderDesc.Description}");

                        sb.AppendLine($"Cargo Capacity : {item.OrderDesc.CargoCapacity:F1}");

                        sb.AppendLine($"\t\t\t{item.OrderPrice:C} - {item.OrderQty}  ");

                    }

                }

​

            }

            WriteONFile(sb);

​

​

​

        }

​

        public void writeOnConsole(StringBuilder sb)

        {

            Console.Write(sb);

        }

​

        public void WriteONFile(StringBuilder sb)

        {

            string wantedPath = Path.GetDirectoryName(Path.GetDirectoryName(System.IO.Directory.GetCurrentDirectory())) +

                                $"\\Output{DateTime.Now.ToString(("yyyyMMddhhmmss"))}.txt";

            FileStream fs1 = new FileStream(wantedPath, FileMode.OpenOrCreate, FileAccess.Write);

​

            using (StreamWriter sw = new StreamWriter(fs1))

            {

                sw.Write(sb);

            }

        }

    }