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//
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#ifndef BLAST_CONTROLLER_H
#define BLAST_CONTROLLER_H

#include "SampleManager.h"
#include "BlastFamily.h"
#include "DebugRenderBuffer.h"
#include "PxSimulationEventCallback.h"
#include "NvBlastExtImpactDamageManager.h"

using namespace physx;

class BlastAsset;
class BlastReplay;

namespace physx
{
class PxTaskManager;
}
namespace Nv
{
namespace Blast
{
class TkFramework;
class ExtGroupTaskManager;
class ExtSerialization;
}
}


struct BlastTimers
{
	double blastDamageMaterial;
	double blastDamageFracture;
	double blastSplitIsland;
	double blastSplitPartition;
	double blastSplitVisibility;
};

/**
Blast Controller. Entry point for all blast related code, keeps blast actors and controls them.
*/
class BlastController : public ISampleController
{
public:
	//////// ctor ////////

	BlastController();
	virtual ~BlastController();

	void reinitialize();

	//////// controller callbacks ////////

	virtual void onSampleStart();
	virtual void onSampleStop();

	virtual void Animate(double dt);
	void drawUI();


	//////// public API ////////

	bool overlap(const PxGeometry& geometry, const PxTransform& pose, std::function<void(ExtPxActor*, BlastFamily&)> hitCall);

	bool stressDamage(ExtPxActor *actor, PxVec3 position, PxVec3 force);

	void deferDamage(ExtPxActor *actor, BlastFamily& family, const NvBlastDamageProgram& program, const void* damageDesc, uint32_t damageDescSize);
	void immediateDamage(ExtPxActor *actor, BlastFamily& family, const NvBlastDamageProgram& program, const void* damageDesc);
	NvBlastFractureBuffers& getFractureBuffers(ExtPxActor* actor);

	BlastFamilyPtr spawnFamily(BlastAsset* blastAsset, const BlastAsset::ActorDesc& desc);
	void removeFamily(BlastFamilyPtr actor);
	void removeAllFamilies();


	//////// public getters/setters ////////

	TkFramework& getTkFramework() const
	{
		return *m_tkFramework;
	}

	TkGroup* getTkGroup() const
	{
		return m_tkGroup;
	}

	ExtPxManager& getExtPxManager() const
	{
		return *m_extPxManager;
	}

	ExtImpactDamageManager*	getExtImpactDamageManager() const
	{
		return m_extImpactDamageManager;
	}

	BlastReplay* getReplay() const
	{
		return m_replay;
	}

	uint32_t getActorCount() const;

	uint32_t getTotalVisibleChunkCount() const;

	size_t getFamilySize() const;

	size_t getBlastAssetsSize() const
	{
		return m_blastAssetsSize;
	}

	const BlastTimers& getLastBlastTimers() const
	{
		return m_lastBlastTimers;
	}

	bool getImpactDamageEnabled() const
	{
		return m_impactDamageEnabled;
	}

	void setImpactDamageEnabled(bool enabled, bool forceUpdate = false);

	ExtStressSolverSettings& getStressSolverSettings()
	{
		return m_extStressSolverSettings;
	}

	float getLastStressDelta() const;

	void notifyPhysXControllerRelease();

	ExtSerialization*	getExtSerialization() const
	{
		return m_extSerialization;
	}

	//////// public variables for UI ////////

	BlastFamily::DebugRenderMode debugRenderMode;
	float debugRenderScale;


	//////// Filter shader enum ////////

	enum FilterDataAttributes
	{
		SUPPRESS_CONTACT_NOTIFY = 1,
	};

private:
	//////// impact damage event callback ////////

	class EventCallback : public PxSimulationEventCallback
	{
	public:
		EventCallback(ExtImpactDamageManager* manager) : m_manager(manager) {}

		// implemented
		virtual void onContact(const PxContactPairHeader& pairHeader, const PxContactPair* pairs, uint32_t nbPairs)
		{
			m_manager->onContact(pairHeader, pairs, nbPairs);
		}

	private:
		// unused
		void onConstraintBreak(PxConstraintInfo*, PxU32) {}
		void onWake(PxActor**, PxU32) {}
		void onSleep(PxActor**, PxU32) {}
		void onTrigger(PxTriggerPair*, PxU32) {}
		void onAdvance(const PxRigidBody*const*, const PxTransform*, const PxU32) {}

		// data
		ExtImpactDamageManager*		m_manager;
	};


	//////// private methods ////////

	void updateDraggingStress();

	void updateImpactDamage();

	void refreshImpactDamageSettings();

	void fillDebugRender();

	void recalculateAssetsSize();

	static bool customImpactDamageFunction(void* data, ExtPxActor* actor, PxShape* shape, PxVec3 position, PxVec3 force);


	//////// used controllers ////////

	Renderer& getRenderer() const
	{
		return getManager()->getRenderer();
	}

	PhysXController& getPhysXController() const
	{
		return getManager()->getPhysXController();
	}


	//////// buffer for damage ////////

	class FixedBuffer
	{
	public:
		FixedBuffer(const uint32_t size)
		{
			m_buffer.resize(size);
			m_index = 0;
		}

		void* push(const void* data, uint32_t size)
		{
			if (m_index + size > m_buffer.size())
				return nullptr;

			void* dst = &m_buffer[m_index];
			memcpy(dst, data, size);
			m_index += size;
			return dst;
		}

		void clear()
		{
			m_index = 0;
		}

	private:
		std::vector<char> m_buffer;
		uint32_t		  m_index;
	};


	//////// internal data ////////

	PxTaskManager*					     m_taskManager;
	TkFramework*					     m_tkFramework;
	TkGroup*						     m_tkGroup;
	ExtPxManager*					     m_extPxManager;
	ExtImpactDamageManager*	             m_extImpactDamageManager;
	ExtImpactSettings				     m_extImpactDamageManagerSettings;
	EventCallback*					     m_eventCallback;
	ExtStressSolverSettings			     m_extStressSolverSettings;
	ExtGroupTaskManager*			     m_extGroupTaskManager;
	ExtSerialization*				     m_extSerialization;

	std::vector<BlastFamilyPtr>		     m_families;
	DebugRenderBuffer                    m_debugRenderBuffer;

	FixedBuffer							 m_damageDescBuffer;
	FixedBuffer		                     m_damageParamsBuffer;

	NvBlastFractureBuffers				 m_fractureBuffers;
	std::vector<char>					 m_fractureData;

	bool                                 m_impactDamageEnabled;
	bool                                 m_impactDamageUpdatePending;
	bool							     m_impactDamageToStressEnabled;

	float							     m_impactDamageToStressFactor;
	float							     m_draggingToStressFactor;

	bool							     m_rigidBodyLimitEnabled;
	uint32_t						     m_rigidBodyLimit;

	BlastReplay*					     m_replay;

	BlastTimers				             m_lastBlastTimers;

	size_t					             m_blastAssetsSize;
};


#endif