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// Copyright (c) 2008-2020 NVIDIA Corporation. All rights reserved.
// Copyright (c) 2004-2008 AGEIA Technologies, Inc. All rights reserved.
// Copyright (c) 2001-2004 NovodeX AG. All rights reserved.

#pragma once

#include "NvCloth/Solver.h"
#include "DxClothData.h"
#include "DxContextLock.h"
#include "DxDeviceVector.h"
#include "../SwInterCollision.h"

struct ID3D11ShaderResourceView;

namespace nv
{
namespace cloth
{

class DxCloth;
class DxFabric;
struct PhaseConfig;
struct DxKernelData;

class DxSolver : private DxContextLock, public Solver
{
	PX_NOCOPY(DxSolver);

  public:
	DxSolver(DxFactory&);
	~DxSolver();

	virtual void addCloth(Cloth*) override;
	virtual void addCloths(Range<Cloth*> cloths) override;
	virtual void removeCloth(Cloth*) override;
	virtual int getNumCloths() const override;
	virtual Cloth * const * getClothList() const override;

	// functions executing the simulation work.
	virtual bool beginSimulation(float dt);
	virtual void simulateChunk(int idx);
	virtual void endSimulation();
	virtual int getSimulationChunkCount() const override;

	virtual bool hasError() const
	{
		return mComputeError;
	}

	virtual void setInterCollisionDistance(float distance)
	{
		mInterCollisionDistance = distance;
	}
	virtual float getInterCollisionDistance() const
	{
		return mInterCollisionDistance;
	}
	virtual void setInterCollisionStiffness(float stiffness)
	{
		mInterCollisionStiffness = stiffness;
	}
	virtual float getInterCollisionStiffness() const
	{
		return mInterCollisionStiffness;
	}
	virtual void setInterCollisionNbIterations(uint32_t nbIterations)
	{
		mInterCollisionIterations = nbIterations;
	}
	virtual uint32_t getInterCollisionNbIterations() const
	{
		return mInterCollisionIterations;
	}
	virtual void setInterCollisionFilter(InterCollisionFilter filter)
	{
		mInterCollisionFilter = filter;
	}

  private:
	// add cloth helper functions
	void addClothAppend(Cloth* cloth);
	void addClothUpdateData();

	// simulate helper functions
	void beginFrame();
	void executeKernel();
	void endFrame();

	void interCollision();

  private:
	DxFactory& mFactory;

	typedef Vector<DxCloth*>::Type ClothVector;
	ClothVector mCloths;

	DxDeviceVector<DxClothData> mClothData;
	Vector<DxClothData>::Type mClothDataHostCopy;
	bool mClothDataDirty;

	DxDeviceVector<DxFrameData> mFrameData;
	DxDeviceVector<DxFrameData> mFrameDataHostCopy;

	DxDeviceVector<DxIterationData> mIterationData;
	Vector<DxIterationData>::Type mIterationDataHostCopy;

	float mFrameDt;

	uint32_t mSharedMemorySize;
	uint32_t mSharedMemoryLimit;

	int mKernelSharedMemorySize;
	ID3D11Query* mSyncQuery;

	float mInterCollisionDistance;
	float mInterCollisionStiffness;
	uint32_t mInterCollisionIterations;
	InterCollisionFilter mInterCollisionFilter;
	void* mInterCollisionScratchMem;
	uint32_t mInterCollisionScratchMemSize;
	Vector<SwInterCollisionData>::Type mInterCollisionInstances;

	bool mComputeError;

	friend void record(const DxSolver&);

	void* mSimulateProfileEventData;
};
}
}