using System;
using System.Collections.Generic;
using System.Text;
using gr2lib.core.helpers;

namespace gr2lib.core.coretypes.implementation
{

    public interface ITexture
    {
        string FromFileName { get; set; }
        int TextureType { get; set; }
        int Width { get; set; }
        int Height { get; set; }
        int Encoding { get; set; }
        int SubFormat { get; set; }
        Layout Layout { get; set; }
        List<Image> Images { get; set; }
        IntPtr ExtendedData { get; set; }
    }

    public class Texture : ITexture
    {
        private string _FromFileName;
        private int _TextureType;
        private int _Width;
        private int _Height;
        private int _Encoding;
        private int _SubFormat;
        private Layout _Layout;
        private List<Image> _Images;
        private IntPtr _ExtendedData;

        public IntPtr NativePointer;

        public Texture()
        {
            this.FromFileName = "";
            this.TextureType = 0;
            this.Width = 0;
            this.Height = 0;
            this.Encoding = 0;
            this.SubFormat = 0;
            this.Layout = new Layout();
            this.Images = new List<Image>();
            this.ExtendedData = IntPtr.Zero;
            this.NativePointer = IntPtr.Zero;
        }

        internal static Texture ReadFromMemory(IntPtr pointer)
        {
            if (pointer == IntPtr.Zero) return null;
            native.Texture native = Helpers.ReadFromMemory<native.Texture>(pointer);
            Texture managed = ReadFromNative(native);
            managed.NativePointer = pointer;
            return managed;
        }

        internal static Texture ReadFromNative(native.Texture native)
        {
            Texture managed = new Texture();
            managed.FromFileName = native.FromFileName;
            managed.TextureType = native.TextureType;
            managed.Width = native.Width;
            managed.Height = native.Height;
            managed.Encoding = native.Encoding;
            managed.SubFormat = native.SubFormat;
            managed.Layout = Layout.ReadFromNative(native.Layout);
            IntPtr[] images = Helpers.ReadPtrArrayFromMemory<native.Image>(native.Images);
            int length = images.Length;
            managed.Images = new List<Image>(length);
            foreach (IntPtr ptr in images)
            {
                managed.Images.Add(new Image());
            }
            for (int i = 0; i < length; i++)
            {
                managed.Images[i] = Image.ReadFromMemory(images[i]);
            }
            managed.ExtendedData = native.ExtendedData;
            return managed;
        }

        #region ITexture Members
        public string FromFileName { get { return _FromFileName; } set { _FromFileName = value; } }
        public int TextureType { get { return _TextureType; } set { _TextureType = value; } }
        public int Width { get { return _Width; } set { _Width = value; } }
        public int Height { get { return _Height; } set { _Height = value; } }
        public int Encoding { get { return _Encoding; } set { _Encoding = value; } }
        public int SubFormat { get { return _SubFormat; } set { _SubFormat = value; } }
        public Layout Layout { get { return _Layout; } set { _Layout = value; } }
        public List<Image> Images { get { return _Images; } set { _Images = value; } }
        public IntPtr ExtendedData { get { return _ExtendedData; } set { _ExtendedData = value; } }
        #endregion
    }
}