using System;
using System.Diagnostics;


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

        public enum TextureName
        {
            Aliens,
            Shield,

            Consolas20pt,
            Consolas36pt,

            HotPink,
            Null_Texture,
            Uninitialized
        }

        public Texture.TextureName name;
        private readonly Azul.Texture poAzulTexture;


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

        public Texture()
        {
            //create and load texture
            this.poAzulTexture = new Azul.Texture();   //LTN: owned by texture
            Debug.Assert(this.poAzulTexture != null);

            this.name = TextureName.Uninitialized;
        }


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

        public void SetTexture(TextureName name, string filename)
        {
            Debug.Assert(filename != null);
            Debug.Assert(this.poAzulTexture != null);

            this.poAzulTexture.Set(filename, Azul.Texture_Filter.NEAREST, Azul.Texture_Filter.NEAREST);
            this.name = name;
        }

        public Azul.Texture GetAzulTexture()
        {
            return this.poAzulTexture;
        }

        public override bool Compare(Node pNode)
        {
            //cant compare null
            Debug.Assert(pNode != null);

            Texture pTexture = (Texture)pNode;
            if(this.name == pTexture.name)
            {
                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("     Azul Texture: {0}", this.poAzulTexture.GetHashCode());

            base.PrintStats();
        }


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

        private void Clear()
        {
            //check texture isn't null
            Debug.Assert(this.poAzulTexture != null);

            this.poAzulTexture.Set("HotPink.tga", Azul.Texture_Filter.NEAREST, Azul.Texture_Filter.NEAREST);
            this.name = TextureName.Uninitialized;
        }


    } //end class

} // end namespace