using System;
using System.Diagnostics;


namespace SpaceInvaders
{
    public abstract class Component : Visitor
    {
        //-------------------------------------------------------------------
        //  FIELDS
        //-------------------------------------------------------------------
        public enum Type
        {
            Leaf,
            Composite,
            Error
        }

        public Type type;
        public Component pParent;
        public Component pReverse;


        //-------------------------------------------------------------------
        //  CONSTRUCTION
        //-------------------------------------------------------------------

        public Component(Component.Type type)
        {
            this.type = type;
            this.pParent = null;
            this.pReverse = null;
        }


        //-------------------------------------------------------------------
        //  PUBLIC METHODS
        //-------------------------------------------------------------------

        public virtual void Ressurect()
        {
            this.pParent = null;
            this.pReverse = null;
        }


        //-------------------------------------------------------------------
        //  ABSTRACT  METHODS
        //-------------------------------------------------------------------

        public abstract void AddComponent(Component c);

        public abstract void RemoveComponent(Component c);

        public abstract void PrintComponent();

        public abstract void Move(float x, float y);


    } // end class

} // end namespace