using System;
using System.Diagnostics;


namespace SpaceInvaders
{
    public class RemoveBombObserver : CollisionObserver
    {
        //-------------------------------------------------------------------
        //  FIELDS
        //-------------------------------------------------------------------

        private GameObject pBomb;
        Random rand = new Random();

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

        public RemoveBombObserver() : base()
        {
            this.pBomb = null;
        }

        public RemoveBombObserver(RemoveBombObserver b) : base()
        {
            Debug.Assert(b.pBomb != null);
            this.pBomb = b.pBomb;
        }


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

        public override void Notify()
        {
            //Debug.WriteLine("Remove Bomb: {0} {1}", this.pSubject.pObjA, this.pSubject.pObjB);
            this.pBomb = (Bomb)this.pSubject.pObjB;
         
            //Debug.WriteLine("Delete Bomb: {0}", pBomb);
            if(pBomb.isDead == false)
            {
                pBomb.isDead = true;

                RemoveBombObserver pObserver = new RemoveBombObserver(this);
                DelayObjectMan.AttachDelay(pObserver);
            }
        }

        public override void Execute()
        {
            //game obj deletes it
            this.pBomb.Remove();

            TimerEventMan.AddEvent(TimerEvent.EventName.AnimateBombDrop, new AnimateBombDrop(), GenRandTime(0.1f, 1.0f));
        }

        float GenRandTime(float min, float max)
        {
            double d = rand.NextDouble();
            double dout = d * (max - min) + min;
            return (float)dout;
        }

    } // end class

} // end namespace