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#pragma once

#include "NvBlastExtDamageShaders.h"
#include "PxBounds3.h"


namespace Nv
{
namespace Blast
{


class ExtDamageAcceleratorInternal : public NvBlastExtDamageAccelerator
{
public:
	struct QueryBondData
	{
		uint32_t bond;
		uint32_t node0;
		uint32_t node1;
	};

	class ResultCallback
	{
	public:
		ResultCallback(QueryBondData* buffer, uint32_t count) :
			m_bondBuffer(buffer), m_bondMaxCount(count), m_bondCount(0) {}

		virtual void processResults(const QueryBondData* bondBuffer, uint32_t count) = 0;

		void push(uint32_t bond, uint32_t node0, uint32_t node1)
		{
			m_bondBuffer[m_bondCount].bond = bond;
			m_bondBuffer[m_bondCount].node0 = node0;
			m_bondBuffer[m_bondCount].node1 = node1;
			m_bondCount++;
			if (m_bondCount == m_bondMaxCount)
			{
				dispatch();
			}
		}

		void dispatch()
		{
			if (m_bondCount)
			{
				processResults(m_bondBuffer, m_bondCount);
				m_bondCount = 0;
			}
		}
		
	private:
		QueryBondData* m_bondBuffer;
		uint32_t	   m_bondMaxCount;

		uint32_t	   m_bondCount;
	};

	virtual void findBondCentroidsInBounds(const physx::PxBounds3& bounds, ResultCallback& resultCallback) const = 0;
	virtual void findBondSegmentsInBounds(const physx::PxBounds3& bounds, ResultCallback& resultCallback) const = 0;
	virtual void findBondSegmentsPlaneIntersected(const physx::PxPlane& plane, ResultCallback& resultCallback) const = 0;

	// Non-thread safe! Multiple calls return the same memory.
	virtual void* getImmediateScratch(size_t size) = 0;
};


} // namespace Blast
} // namespace Nv