#pragma once
#include <string>
#include <sstream>
#include <fbxsdk.h>
#include <DirectXMath.h>

inline std::wstring getNodeId(FbxNode* node) {
	auto nId = node->GetUniqueID();
	std::wstringstream strstream;
	strstream << nId;
	auto name = node->GetName();
	if (name) {
		strstream << L"_" << name;
	}
	return strstream.str();
}

const double Euler2Rad = 3.141592653589793238462 / 180;

inline FbxMatrix GetGeometryTransformation(FbxNode* inNode)
{
	if (!inNode)
	{
		throw std::exception("Null for mesh geometry");
	}

	const FbxVector4 lT = inNode->GetGeometricTranslation(FbxNode::eSourcePivot);
	const FbxVector4 lR = inNode->GetGeometricRotation(FbxNode::eSourcePivot);
	const FbxVector4 lS = inNode->GetGeometricScaling(FbxNode::eSourcePivot);

	return FbxMatrix(lT, lR, lS);
}

inline FbxMatrix ConvertToBabylonCoordinateSystem(const FbxMatrix& origin){
	FbxVector4 trans;
	FbxQuaternion rot;
	FbxVector4 shearing;
	FbxVector4 scaling;
	double sign;
	origin.GetElements(trans, rot, shearing, scaling, sign);
	trans[2] = -trans[2]; // This negate Z of Translation Component of the matrix
	rot[0] = -rot[0];
	rot[1] = -rot[1];
	return FbxMatrix (trans, rot, scaling);
}
//
//inline FbxAMatrix CalculateGlobalTransform(FbxNode* pNode, const FbxTime& time = FBXSDK_TIME_INFINITE)
//{
//	FbxAMatrix lTranlationM, lScalingM, lScalingPivotM, lScalingOffsetM, lRotationOffsetM, lRotationPivotM, \
//		lPreRotationM, lRotationM, lPostRotationM, lTransform;
//
//	FbxAMatrix lParentGX, lGlobalT, lGlobalRS;
//
//	if (!pNode)
//	{
//		lTransform.SetIdentity();
//		return lTransform;
//	}
//
//	// Construct translation matrix
//	FbxVector4 lTranslation = pNode->LclTranslation.EvaluateValue(time);
//	lTranlationM.SetT(lTranslation);
//
//	// Construct rotation matrices
//	FbxVector4 lRotation = pNode->LclRotation.EvaluateValue(time);
//	FbxVector4 lPreRotation = pNode->PreRotation.EvaluateValue(time);
//	FbxVector4 lPostRotation = pNode->PostRotation.EvaluateValue(time);
//	lRotationM.SetR(lRotation);
//	lPreRotationM.SetR(lPreRotation);
//	lPostRotationM.SetR(lPostRotation);
//
//	// Construct scaling matrix
//	FbxVector4 lScaling = pNode->LclScaling.EvaluateValue(time);
//	lScalingM.SetS(lScaling);
//
//	// Construct offset and pivot matrices
//	FbxVector4 lScalingOffset = pNode->ScalingOffset.EvaluateValue(time);
//	FbxVector4 lScalingPivot = pNode->ScalingPivot.EvaluateValue(time);
//	FbxVector4 lRotationOffset = pNode->RotationOffset.EvaluateValue(time);
//	FbxVector4 lRotationPivot = pNode->RotationPivot.EvaluateValue(time);
//	lScalingOffsetM.SetT(lScalingOffset);
//	lScalingPivotM.SetT(lScalingPivot);
//	lRotationOffsetM.SetT(lRotationOffset);
//	lRotationPivotM.SetT(lRotationPivot);
//
//	// Calculate the global transform matrix of the parent node
//	FbxNode* lParentNode = pNode->GetParent();
//	if (lParentNode)
//	{
//		lParentGX = CalculateGlobalTransform(lParentNode);
//	}
//	else
//	{
//		lParentGX.SetIdentity();
//	}
//
//	//Construct Global Rotation
//	FbxAMatrix lLRM, lParentGRM;
//	FbxVector4 lParentGR = lParentGX.GetR();
//	lParentGRM.SetR(lParentGR);
//	lLRM = lPreRotationM * lRotationM * lPostRotationM;
//
//	//Construct Global Shear*Scaling
//	//FBX SDK does not support shear, to patch this, we use:
//	//Shear*Scaling = RotationMatrix.Inverse * TranslationMatrix.Inverse * WholeTranformMatrix
//	FbxAMatrix lLSM, lParentGSM, lParentGRSM, lParentTM;
//	FbxVector4 lParentGT = lParentGX.GetT();
//	lParentTM.SetT(lParentGT);
//	lParentGRSM = lParentTM.Inverse() * lParentGX;
//	lParentGSM = lParentGRM.Inverse() * lParentGRSM;
//	lLSM = lScalingM;
//
//	//Do not consider translation now
//	FbxTransform::EInheritType lInheritType = pNode->InheritType.EvaluateValue(time);
//	if (lInheritType == FbxTransform::eInheritRrSs)
//	{
//		lGlobalRS = lParentGRM * lLRM * lParentGSM * lLSM;
//	}
//	else if (lInheritType == FbxTransform::eInheritRSrs)
//	{
//		lGlobalRS = lParentGRM * lParentGSM * lLRM * lLSM;
//	}
//	else if (lInheritType == FbxTransform::eInheritRrs)
//	{
//		FbxAMatrix lParentLSM;
//		FbxVector4 lParentLS = lParentNode->LclScaling.EvaluateValue(time);
//		lParentLSM.SetS(lParentLS);
//
//		FbxAMatrix lParentGSM_noLocal = lParentGSM * lParentLSM.Inverse();
//		lGlobalRS = lParentGRM * lLRM * lParentGSM_noLocal * lLSM;
//	}
//	else
//	{
//		FBXSDK_printf("error, unknown inherit type! \n");
//	}
//
//	// Construct translation matrix
//	// Calculate the local transform matrix
//	lTransform = lTranlationM * lRotationOffsetM * lRotationPivotM * lPreRotationM * lRotationM * lPostRotationM * lRotationPivotM.Inverse()\
//		* lScalingOffsetM * lScalingPivotM * lScalingM * lScalingPivotM.Inverse();
//	FbxVector4 lLocalTWithAllPivotAndOffsetInfo = lTransform.GetT();
//	// Calculate global translation vector according to: 
//	// GlobalTranslation = ParentGlobalTransform * LocalTranslationWithPivotAndOffsetInfo
//	FbxVector4 lGlobalTranslation = lParentGX.MultT(lLocalTWithAllPivotAndOffsetInfo);
//	lGlobalT.SetT(lGlobalTranslation);
//
//	//Construct the whole global transform
//	lTransform = lGlobalT * lGlobalRS;
//
//	return lTransform;
//}

//
//inline FbxAMatrix CalculateLocalTransform(FbxNode* pNode, const FbxTime& time = FBXSDK_TIME_INFINITE)
//{
//	FbxAMatrix lTranlationM, lScalingM, lScalingPivotM, lScalingOffsetM, lRotationOffsetM, lRotationPivotM, \
//		lPreRotationM, lRotationM, lPostRotationM, lTransform;
//
//
//	if (!pNode)
//	{
//		lTransform.SetIdentity();
//		return lTransform;
//	}
//
//	// Construct translation matrix
//	FbxVector4 lTranslation = pNode->LclTranslation.EvaluateValue(time);
//	lTranlationM.SetT(lTranslation);
//
//	// Construct rotation matrices
//	FbxVector4 lRotation = pNode->LclRotation.EvaluateValue(time);
//	FbxVector4 lPreRotation = pNode->PreRotation.EvaluateValue(time);
//	FbxVector4 lPostRotation = pNode->PostRotation.EvaluateValue(time);
//	lRotationM.SetR(lRotation);
//	lPreRotationM.SetR(lPreRotation);
//	lPostRotationM.SetR(lPostRotation);
//
//	// Construct scaling matrix
//	FbxVector4 lScaling = pNode->LclScaling.EvaluateValue(time);
//	lScalingM.SetS(lScaling);
//
//	// Construct offset and pivot matrices
//	FbxVector4 lScalingOffset = pNode->ScalingOffset.EvaluateValue(time);
//	FbxVector4 lScalingPivot = pNode->ScalingPivot.EvaluateValue(time);
//	FbxVector4 lRotationOffset = pNode->RotationOffset.EvaluateValue(time);
//	FbxVector4 lRotationPivot = pNode->RotationPivot.EvaluateValue(time);
//	lScalingOffsetM.SetT(lScalingOffset);
//	lScalingPivotM.SetT(lScalingPivot);
//	lRotationOffsetM.SetT(lRotationOffset);
//	lRotationPivotM.SetT(lRotationPivot);
//
//	
//	
//
//	// Construct translation matrix
//	// Calculate the local transform matrix
//	lTransform = lTranlationM * lRotationOffsetM * lRotationPivotM * lPreRotationM * lRotationM * lPostRotationM * lRotationPivotM.Inverse()\
//		* lScalingOffsetM * lScalingPivotM * lScalingM * lScalingPivotM.Inverse();
//	
//
//	return lTransform;
//}