namespace DesignPatterns.Builder
{
    class Program
    {
        static void Main(string[] args)
        {
            PenDirector director = new PenDirector();
            Pen ballpointpen = director.ConstructPen(new BallpointPenBuilder());
            Pen brushpen = director.ConstructPen(new BrushPenBuilder());
        }
    }

    /// <summary>
    /// 創建抽象產品類 -- 筆 
    /// </summary>
    public abstract class Pen
    {
        /**筆芯**/
        private string _cartridge;
        /**外殼**/
        private string _shell;

        public string GetCartridge()
        {
            return _cartridge;
        }
        public void SetCartridge(string cartridge)
        {
            this._cartridge = cartridge;
        }
        public string GetShell()
        {
            return _shell;
        }
        public void SetShell(string shell)
        {
            this._shell = shell;
        }
    }
    public interface IPenBuilder
    {
        /**
         * 生產筆芯
         */
        void BuildCartridge();
        /**
         * 生產外殼
         */
        void BuildShell();
        /**
         * 組裝筆
         */
        Pen BuildPen();
    }


    /// <summary>
    /// 具體產品類 -- 圓珠筆
    /// </summary>
    public class BallpointPen : Pen
    {

        public BallpointPen()
        {
            Console.WriteLine("生產組裝圓珠筆");
        }
    }
    /// <summary>
    /// 具體產品類 -- 畫筆
    /// </summary>
    public class BrushPen : Pen
    {

        public BrushPen()
        {
            Console.WriteLine("生產組裝畫筆");
        }
    }

    /// <summary>
    /// 建造者（具體）  -- 圓珠筆builder
    /// </summary>
    public class BallpointPenBuilder : IPenBuilder
    {

        Pen _pen;

        public BallpointPenBuilder()
        {
            _pen = new BallpointPen();
        }


        public void BuildCartridge()
        {
            _pen.SetCartridge("圓珠筆筆芯");
        }


        public void BuildShell()
        {
            _pen.SetShell("圓珠筆外殼");
        }


        public Pen BuildPen()
        {
            return _pen;
        }

    }


    /// <summary>
    /// 建造者（具體）  -- 畫筆builder
    /// </summary>
    public class BrushPenBuilder : IPenBuilder
    {

        Pen _pen;

        public BrushPenBuilder()
        {
            _pen = new BrushPen();
        }


        public void BuildCartridge()
        {
            _pen.SetCartridge("畫筆筆芯");
        }


        public void BuildShell()
        {
            _pen.SetShell("畫筆外殼");
        }


        public Pen BuildPen()
        {
            return _pen;
        }

    }

    /// <summary>
    /// 導演類  Director
    /// </summary>
    public class PenDirector
    { 
        public Pen ConstructPen(IPenBuilder penBuilder)
        {
            //生產筆芯
            penBuilder.BuildCartridge();
            //生產外殼
            penBuilder.BuildShell();
            //組裝筆
            return penBuilder.BuildPen();
        }
    }
}