using System;

  using System.Diagnostics;

  using System.IO;

  using System.Threading;

  namespace BuilderPattern {

    //  Builder Pattern    D-J Miller and Judith Bishop Sept 2007

    // Abstract Factory : Builder Implementation

    interface IBuilder<Brand>

      where Brand : IBrand {

      IBag CreateBag();

    }

    // Abstract Factory now the Builder

    class Builder<Brand> : IBuilder<Brand>

      where Brand : IBrand, new() {

      Brand myBrand;

      public Builder() {

        myBrand = new Brand();

      }

      public IBag CreateBag() {

        return myBrand.CreateBag();

      }

    }

    // Product 1

    interface IBag {

      string Properties { get; set; }

    }

    // Concrete Product 1

    class Bag :IBag {

      public string Properties { get; set; }

    }

    // Directors

    interface IBrand {

      IBag CreateBag();

    }

    class Gucci : IBrand {

      public IBag CreateBag() {

        Bag b = new Bag();

        Program.DoWork("Cut Leather", 250);

        Program.DoWork("Sew leather", 1000);

        b.Properties += "Leather";

        Program.DoWork("Create Lining", 500);

        Program.DoWork("Attach Lining", 1000);

        b.Properties += " lined";

        Program.DoWork("Add Label", 250);

        b.Properties += " with label";

        return b;

      }

    }

    class Poochy : IBrand {

      public IBag CreateBag() {

        Bag b = new Bag();

        Program.DoWork("Hire cheap labour", 200);

        Program.DoWork("Cut Plastic", 125);

        Program.DoWork("Sew Plastic", 500);

        b.Properties += "Plastic";

        Program.DoWork("Add Label", 100);

        b.Properties += " with label";

        return b;

      }

    }

    class Client<Brand>

      where Brand : IBrand, new() {

        

      public void ClientMain() { //IFactory<Brand> factory)

        IBuilder<Brand> factory = new Builder<Brand>();

        DateTime date = DateTime.Now;

        Console.WriteLine("I want to buy a bag!");

        IBag bag = factory.CreateBag();

        Console.WriteLine("I got my Bag which took " + DateTime.Now.Subtract(date).TotalSeconds * 5 + " days");

        Console.WriteLine("  with the following properties " + bag.Properties+"\n");

      }

    }

    static class Program {

    

      static void Main() {

        // Call Client twice

        new Client<Poochy>().ClientMain();

        new Client<Gucci>().ClientMain();

      }

      public static void DoWork(string workitem, int time) {

        Console.Write("" + workitem + ": 0%");

        Thread.Sleep(time);

        Console.Write("....25%");

        Thread.Sleep(time);

        Console.Write("....50%");

        Thread.Sleep(time);

        Console.WriteLine("....100%");

      }

    }

  }

/*Output

I want to buy a bag!

Hire cheap labour: 0%....25%....50%....100%

Cut Plastic: 0%....25%....50%....100%

Sew Plastic: 0%....25%....50%....100%

Add Label: 0%....25%....50%....100%

I got my Bag which took 14.02016 days

  with the following properties Plastic with label

I want to buy a bag!

Cut Leather: 0%....25%....50%....100%

Sew leather: 0%....25%....50%....100%

Create Lining: 0%....25%....50%....100%

Attach Lining: 0%....25%....50%....100%

Add Label: 0%....25%....50%....100%

I got my Bag which took 45.0648 days

  with the following properties Leather lined with label

*/