using System;
using System.Diagnostics;

namespace SpaceInvaders
{
    public class SpriteBatch : DLink
    {
        //-------------------------------------------------------------------
        //  FIELDS
        //-------------------------------------------------------------------

        public enum BatchName
        {
            Aliens,
            UFO,
            Ships,

            Boxes,
            BumpBox,
            Shields,

            Walls,
            Bumpers,

            Bombs,
            Missles,

            Text_UI,
            Text_Attract1,
            Text_Attract2,

            Uninitialized
        }

        public SpriteBatch.BatchName name;

        private SpriteNodeMan poSpriteNodeMan;
        private bool toggle;
        private int priority;


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

        public SpriteBatch() : base()
        {
            this.name = BatchName.Uninitialized;
            this.priority = 0;
            this.toggle = true;
            
            this.poSpriteNodeMan = new SpriteNodeMan();
            Debug.Assert(this.poSpriteNodeMan != null);
        }


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

        public void SetBatch(SpriteBatch.BatchName name, int priority, int numReserve = 3, int growReserve = 2)
        {
            //set batch name & priority
            this.name = name;
            this.priority = priority;

            //set asso sprite node
            this.poSpriteNodeMan.SetSpriteNode(name, numReserve, growReserve);
        }

        public SpriteNodeMan GetSpriteNodeMan()
        {
            return this.poSpriteNodeMan;
        }

        public void SetToggle(bool status)
        {
            this.toggle = status;
        }

        public bool GetToggle()
        {
            return this.toggle;
        }

        public SpriteNode AttachBatch(GameObject pObject)
        {
            Debug.Assert(pObject != null);
            SpriteNode pNode = this.poSpriteNodeMan.AttachSpriteNode(pObject.pProxy);
            
            //initialize batch node
            pNode.SetSpriteNode(pObject.pProxy, this.poSpriteNodeMan);

            //back pointer
            this.poSpriteNodeMan.SetSpriteBatch(this);

            return pNode;
        }

        public SpriteNode AttachBatch(SpriteBase pBase)
        {
            SpriteNode pNode = this.poSpriteNodeMan.AttachSpriteNode(pBase);
            pNode.SetSpriteNode(pBase, this.poSpriteNodeMan);

            this.poSpriteNodeMan.SetSpriteBatch(this);

            return pNode;
        }

       
        //-------------------------------------------------------------------
        //  OVERRIDE METHODS
        //-------------------------------------------------------------------

        //compare batches same by name
        public override bool Compare(Node pNode)
        {
            //check incoming node
            Debug.Assert(pNode != null);

            SpriteBatch pBatch2 = (SpriteBatch)pNode;
            if(this.name == pBatch2.name)
            {
                return true;
            }

            return false;
        }

        public override bool ComparePriority(Node pNode)
        {
            //check incoming
            Debug.Assert(pNode != null);

            SpriteBatch pBatch2 = (SpriteBatch)pNode;
            if(this.priority <= pBatch2.priority)
            {
                return true;
            }

            return false;
        }

        public override object GetName()
        {
            return this.name;
        }

        public override void Reset()
        {
            this.Clear();
        }

        public override void PrintStats()
        {
            Debug.WriteLine("Name: {0} --> {1}", this.name, this.GetHashCode());
            Debug.WriteLine("Priority: {0}", this.priority);

            base.PrintStats();
        }


        //-------------------------------------------------------------------
        //  PRIVATE METHODS
        //-------------------------------------------------------------------

        private void Clear()
        {
            this.name = BatchName.Uninitialized;
            this.priority = 0;
        }


    } //end class

} //end namespace