using System;
using System.Diagnostics;

namespace SpaceInvaders
{
    public class Missile : Missiles
    {
        //-------------------------------------------------------------------
        //  FIELDS
        //-------------------------------------------------------------------

        public float delta;


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

        public Missile(Sprite.SpriteName spriteName, float x, float y)
            : base(GameObject.ObjectName.Missile, spriteName, x, y)
        {
            this.x = x;
            this.y = y;
            this.delta = 10.0f;

            this.pColObj.pCollisionSprite.SetColor(1.0f, 1.0f, 0.0f);

        }


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

        public void SetPosition(float x, float y)
        {
            this.x = x;
            this.y = y;
        }

        public void Resurrect(float x, float y)
        {
            this.x = x;
            this.y = y;
            this.delta = 8.0f;

            base.Ressurect();
            this.pColObj.pCollisionSprite.SetColor(1.0f, 1.0f, 0.0f);
        }

        public override void Update()
        {
            base.Update();
            this.y += delta;
        }

        public override void Remove()
        {
            //Debug.WriteLine("Removing: {0}", this.name);
            this.pColObj.pCollisionRect.Set(0.0f, 0.0f, 0.0f, 0.0f);
            base.Update();

            //update parent (root)
            GameObject pParent = (GameObject)this.pParent;
            pParent.Update();

            //remove it
            base.Remove();
        }


        //-------------------------------------------------------------------
        //  ACCEPT METHODS
        //-------------------------------------------------------------------

        public override void Accept(Visitor other)
        {
            other.Visit(this);
        }

        public override void Visit(AlienGrid alien)
        {
            //missile vs alien grid
            CollisionPair.CollidePair(this, (GameObject)ForwardIterator.GetChild(alien));
        }

        public override void Visit(AlienColumn alien)
        {
            //missile vs alien col
            CollisionPair.CollidePair(this, (GameObject)ForwardIterator.GetChild(alien));
        }

        public override void Visit(OctopusAlien alien)
        {
            //missile vs octopus alien
            CollisionPair pPair = CollisionPairMan.GetActivePair();
            Debug.Assert(pPair != null);

            pPair.SetCollision(this, alien);
            pPair.NotifyListeners();
        }

        public override void Visit(CrabAlien alien)
        {
            //missile vs crab alien
            CollisionPair pPair = CollisionPairMan.GetActivePair();
            Debug.Assert(pPair != null);

            pPair.SetCollision(this, alien);
            pPair.NotifyListeners();
        }

        public override void Visit(SquidAlien alien)
        {
            //missile vs squid alien
            CollisionPair pPair = CollisionPairMan.GetActivePair();
            Debug.Assert(pPair != null);

            pPair.SetCollision(this, alien);
            pPair.NotifyListeners();
        }


    }
}