using System;

using System.Collections.Generic;

using System.Text;

namespace DecoratorExample

{

    class Program

    {

        static void Main(string[] args)

        {

            Weapon w = new Rifle();

            w.ShowInfo();

            Enhance enhancedWeapon = new Enhance(w);

            enhancedWeapon.EnhanceAmmo();

            enhancedWeapon.ShowInfo();

            Wear wornWeapon = new Wear(w);

            wornWeapon.WearByRate(0.8);

            wornWeapon.ShowInfo();

        }

    }

    abstract class Weapon

    {

        private double ammo;

        public double Ammo

        {

            get { return ammo; }

            set { ammo = value; }

        }

        private double attack;

        public double Attack

        {

            get { return attack; }

            set { attack = value; }

        }

        private double speed;

        public double Speed

        {

            get { return speed; }

            set { speed = value; }

        }

        private string name;

        public string Name

        {

            get { return name; }

            set { name = value; }

        }

        public abstract void ShowInfo();

    }

    class Rifle : Weapon

    {

        public Rifle()

        {

            this.Ammo = 100;

            this.Attack = 10;

            this.Speed = 5;

            this.Name = "Rifle";

        }

        public override void ShowInfo()

        {

            Console.WriteLine(string.Format("ammo\t{0}", Ammo));

            Console.WriteLine(string.Format("attack\t{0}", Attack));

            Console.WriteLine(string.Format("speed\t{0}", Speed));

            Console.WriteLine(string.Format("name\t{0}",  Name));

        }

    }

    abstract class Decorator : Weapon

    {

        protected Weapon w;

        public Decorator(Weapon w)

        {

            this.w = w;

        }

        public override void ShowInfo()

        {

            w.ShowInfo();

        }

    }

    class Enhance : Decorator

    {

        public Enhance(Weapon w) : base(w) { }

        public void EnhanceAmmo()

        {

            w.Ammo += 20;

            Console.WriteLine(">>>>>>>>>>>>Enhanced");

        }

    }

    class Wear : Decorator

    {

        public Wear(Weapon w) : base(w) { }

        public void WearByRate(double rate)

        {

            w.Speed = w.Speed * rate;

            w.Attack = w.Attack * rate;

            Console.WriteLine(">>>>>>>>>>>>Worn");

        }

    }

}