#pragma once
#include "Resource.h"

struct PrimitiveTopology
{
	enum Enumeration
	{
		Undefined = 0,
		PointList = 1,
		LineList = 2,
		LineStrip = 3,
		TriangleList = 4,
		TriangleStrip = 5,

		LineListAdjacency = 10,
		LineStripAdjacency = 11,
		TriangleListAdjacency = 12,
		TriangleStripAdjacency = 13
	};
};


struct VertexElement
{
	enum Enumeration
	{
		Position,
		PositionT,
		Normal,
		Binormal,
		Tangent,
		Color,
		BlendWeight,
		BlendIndices,
		Texture2D,
		Texture3D,
		Texture4D,
		PointSize
	};

	VertexElement(Enumeration argElement, uint32 argNameIndex = 0)
		: m_NameIndex(argNameIndex)
		, m_WellKnownFormat(argElement)
	{
		switch (argElement)
		{
		case PositionT:
			{
				m_SemanticName = "POSITIONT";
				m_ElementFormat = DataFormat::R32G32B32A32_Float;
				m_Size = 4 * sizeof(float);
				break;
			}
		case Normal:
			{
				m_SemanticName = "NORMAL";
				m_ElementFormat = DataFormat::R32G32B32_Float;
				m_Size = 3 * sizeof(float);
				break;
			}
		case Binormal:
			{
				m_SemanticName = "BINORMAL";
				m_ElementFormat = DataFormat::R32G32B32_Float;
				m_Size = 3 * sizeof(float);
				break;
			}
		case Tangent:
			{
				m_SemanticName = "TANGENT";
				m_ElementFormat = DataFormat::R32G32B32_Float;
				m_Size = 3 * sizeof(float);
				break;
			}
		case Color:
			{
				m_SemanticName = "COLOR";
				m_ElementFormat = DataFormat::R8G8B8A8_UnsignedNormalized;
				m_Size = 4 * sizeof(unsigned char);
				break;
			}
		case BlendWeight:
			{
				m_SemanticName = "BLENDWEIGHT";
				m_ElementFormat = DataFormat::R32G32B32A32_Float;
				m_Size = 4 * sizeof(float);
				break;
			}
		case BlendIndices:
			{
				m_SemanticName = "BLENDINDICES";
				m_ElementFormat = DataFormat::R32G32B32A32_SignedInteger;
				m_Size = 4 * sizeof(int);
				break;
			}
		case Texture2D:
			{
				m_SemanticName = "TEXCOORD";
				m_ElementFormat = DataFormat::R32G32_Float;
				m_Size = 2 * sizeof(float);
				break;
			}
		case Texture3D:
			{
				m_SemanticName = "TEXCOORD";
				m_ElementFormat = DataFormat::R32G32B32_Float;
				m_Size = 3 * sizeof(float);
				break;
			}
		case Texture4D:
			{
				m_SemanticName = "TEXCOORD";
				m_ElementFormat = DataFormat::R32G32B32A32_Float;
				m_Size = 4 * sizeof(float);
				break;
			}
		case PointSize:
			{
				m_SemanticName = "PSIZE";
				m_ElementFormat = DataFormat::R32_Float;
				m_Size = 1 * sizeof(float);
				break;
			}
		case Position:
		default:
			{
				m_SemanticName = "POSITION";
				m_ElementFormat = DataFormat::R32G32B32_Float;
				m_Size = 3 * sizeof(float);
				break;
			}
		}
	}

	string8 m_SemanticName;
	DataFormat::Enumeration m_ElementFormat;
	Enumeration m_WellKnownFormat;
	uint32 m_NameIndex;
	uint32 m_Size;
};


struct __declspec(novtable) IGeometryBuffer
{
	virtual ~IGeometryBuffer() {}
	virtual void SetVertexData(uint32 argVertexCount, uint32 argVertexElementSize, void* a_VertexData_, const std::vector<VertexElement>& argVertexElements, bool argNeedsDynamicAccess) = 0;
	virtual void DeleteVertexData() = 0;
	virtual void SetIndexData(uint32 argIndexCount, uint32* aui_IndexData_, bool argNeedsDynamicAccess) = 0;
	virtual void DeleteIndexData() = 0;

	virtual void* MapVertexBuffer(DataAccessMode::Enumeration argAccessMode) = 0;
	virtual void UnmapVertexBuffer() = 0;

	virtual uint32* MapIndexBuffer(DataAccessMode::Enumeration argAccessMode) = 0;
	virtual void UnmapIndexBuffer() = 0;

	virtual uint32 get_IndexBufferOffset() const = 0;
	virtual void set_IndexBufferOffset(uint32 argValue) = 0;
	virtual uint32 get_IndexBufferUsableLength() const = 0;
	virtual void set_IndexBufferUsableLength(uint32 argValue) = 0;

	virtual uint32 get_IndexBufferLength() const = 0;
	virtual uint32 get_VertexBufferLength() const = 0;

	//virtual ICollisionHull get_CollisionHull() const = 0;
	virtual PrimitiveTopology::Enumeration get_PrimitiveTopology() const = 0;
	virtual void set_PrimitiveTopology(PrimitiveTopology::Enumeration argValue) = 0;

	virtual void ConvertToAdjacency() = 0;
};