using System;
using System.Collections.Generic;
namespace Aiwaz.Contracts
{
    public struct VertexElement
    {
        public enum Format
        {
            Position,
            PositionT,
            Normal,
            Binormal,
            Tangent,
            Color,
            BlendWeight,
            BlendIndices,
            Texture2D,
            Texture3D,
            Texture4D,
            PointSize
        };

        public VertexElement(Format argFormat)
            : this(argFormat, 0)
        {

        }
        public VertexElement(Format argFormat, int argNameIndex)
        {
            NameIndex = argNameIndex;
            WellKnownFormat = argFormat;
            switch (argFormat)
            {
                case Format.PositionT:
                    {
                        SemanticName = "POSITIONT";
                        ElementFormat = SlimDX.DXGI.Format.R32G32B32A32_Float;
                        Size = 4 * sizeof(float);
                        break;
                    }
                case Format.Normal:
                    {
                        SemanticName = "NORMAL";
                        ElementFormat = SlimDX.DXGI.Format.R32G32B32_Float;
                        Size = 3 * sizeof(float);
                        break;
                    }
                case Format.Binormal:
                    {
                        SemanticName = "BINORMAL";
                        ElementFormat = SlimDX.DXGI.Format.R32G32B32_Float;
                        Size = 3 * sizeof(float);
                        break;
                    }
                case Format.Tangent:
                    {
                        SemanticName = "TANGENT";
                        ElementFormat = SlimDX.DXGI.Format.R32G32B32_Float;
                        Size = 3 * sizeof(float);
                        break;
                    }
                case Format.Color:
                    {
                        SemanticName = "COLOR";
                        ElementFormat = SlimDX.DXGI.Format.R8G8B8A8_UNorm;
                        Size = 4 * sizeof(byte);
                        break;
                    }
                case Format.BlendWeight:
                    {
                        SemanticName = "BLENDWEIGHT";
                        ElementFormat = SlimDX.DXGI.Format.R32G32B32A32_Float;
                        Size = 4 * sizeof(float);
                        break;
                    }
                case Format.BlendIndices:
                    {
                        SemanticName = "BLENDINDICES";
                        ElementFormat = SlimDX.DXGI.Format.R32G32B32A32_SInt;
                        Size = 4 * sizeof(int);
                        break;
                    }
                case Format.Texture2D:
                    {
                        SemanticName = "TEXCOORD";
                        ElementFormat = SlimDX.DXGI.Format.R32G32_Float;
                        Size = 2 * sizeof(float);
                        break;
                    }
                case Format.Texture3D:
                    {
                        SemanticName = "TEXCOORD";
                        ElementFormat = SlimDX.DXGI.Format.R32G32B32_Float;
                        Size = 3 * sizeof(float);
                        break;
                    }
                case Format.Texture4D:
                    {
                        SemanticName = "TEXCOORD";
                        ElementFormat = SlimDX.DXGI.Format.R32G32B32A32_Float;
                        Size = 4 * sizeof(float);
                        break;
                    }
                case Format.PointSize:
                    {
                        SemanticName = "PSIZE";
                        ElementFormat = SlimDX.DXGI.Format.R32_Float;
                        Size = 1 * sizeof(float);
                        break;
                    }
                case Format.Position:
                default:
                    {
                        SemanticName = "POSITION";
                        ElementFormat = SlimDX.DXGI.Format.R32G32B32_Float;
                        Size = 3 * sizeof(float);
                        break;
                    }
            }
        }

        public string SemanticName;
        public SlimDX.DXGI.Format ElementFormat;
        public Format WellKnownFormat;
        public int NameIndex;
        public int Size;
    };

    public interface IGeometryBuffer
    {
        void ConvertToAdjacency();
        void DeleteIndexData();
        void DeleteVertexData();

        int IndexBufferLength { get; }
        int IndexBufferOffset { get; set; }
        int IndexBufferUsableLength { get; set; }

        void SetIndexData(IEnumerable<uint> argIndexData, bool argNeedsDynamicAccess);
        void SetIndexData(int argIndexCount, SlimDX.DataStream argIndexData, bool argNeedsDynamicAccess);
        void SetVertexData<TVertex>(IEnumerable<TVertex> argVertexData, VertexElement[] argVertexElements, bool argNeedsDynamicAccess) where TVertex : struct;
        void SetVertexData(int argVertexCount, SlimDX.DataStream argVertexData, VertexElement[] argVertexElements, bool argNeedsDynamicAccess);

        SlimDX.DataStream MapIndexBufferRaw(SlimDX.Direct3D10.MapMode argAccessMode);
        uint[] MapIndexBuffer(SlimDX.Direct3D10.MapMode argAccessMode);
        SlimDX.DataStream MapVertexBufferRaw(SlimDX.Direct3D10.MapMode argAccessMode);
        TVertex[] MapVertexBuffer<TVertex>(SlimDX.Direct3D10.MapMode argAccessMode) where TVertex : struct;

        void UnmapIndexBuffer();
        void UnmapVertexBuffer();

        SlimDX.Direct3D10.PrimitiveTopology PrimitiveTopology { get; set; }

        int VertexBufferLength { get; }
        bool IsPickable { get; set; }
        IPickHull PickHull { get; }
    }
}