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#ifndef NVBLASTEXTPXMANAGER_H
#define NVBLASTEXTPXMANAGER_H

#include "NvBlastTypes.h"
#include "PxConvexMeshGeometry.h"
#include "PxTransform.h"
#include "NvPreprocessor.h"


// Forward declarations
namespace physx
{
class PxPhysics;
class PxCooking;
class PxRigidDynamic;
class PxJoint;

namespace general_PxIOStream2
{
class PxFileBuf;
}
}  // namespace physx


namespace Nv
{
namespace Blast
{

// Forward declarations
class ExtPxActor;
class ExtPxAsset;
class ExtPxFamily;
class ExtPxListener;
class TkFamily;
class TkFramework;
class TkGroup;
class TkJoint;
class ExtPxCollisionBuilder;


/**
Family Desc.

Used to create Physics Family.
*/
struct ExtPxFamilyDesc
{
	ExtPxAsset* pxAsset;                //!< px asset to create from, pointer will be stored in family.
	const NvBlastActorDesc* actorDesc;  //!< actor descriptor to be used when creating TkActor. If nullptr, default
	                                    //!< NvBlastActorDesc from ExtPxAsset will be used.
	TkGroup* group;                     //!< if not nullptr, created TkActor will be placed in group
};


/**
Function pointer for PxJoint creation.

It will be called when new joints are being created. It should return valid PxJoint pointer or nullptr.
*/
typedef physx::PxJoint* (*ExtPxCreateJointFunction)(ExtPxActor* actor0, const physx::PxTransform& localFrame0,
                                                    ExtPxActor* actor1, const physx::PxTransform& localFrame1,
                                                    physx::PxPhysics& physics, TkJoint& joint);


/**
Physics Manager.

Used to create and manage Physics Families.
*/
class NV_DLL_EXPORT ExtPxManager
{
  public:
	//////// manager creation ////////

	/**
	Create a new ExtPxManager.

	\param[in]	physics			The PxPhysics instance to be used by ExtPxManager.
	\param[in]	framework		The TkFramework instance to be used by ExtPxManager.
	\param[in]	cooking			The optional PxCooking. Required for collision builder.
	\param[in]	createFn		The function to be used when creating joints, can be nullptr.
	\param[in]	useUserData		Flag if ExtPxManager is allowed to override PxActor's userData, it will store pointer to
	PxActor there. It is recommended as fastest way. If set to 'false' HashMap will be used.

	\return the new ExtPxManager if successful, NULL otherwise.
	*/
	static ExtPxManager* create(physx::PxPhysics& physics, TkFramework& framework,
	                            ExtPxCreateJointFunction createFn = nullptr, bool useUserData = true);

	/**
	Create PhysX based convex mesh builder.
	*/
	static ExtPxCollisionBuilder* createCollisionBuilder(physx::PxPhysics& physics, physx::PxCooking& cooking);

	/**
	Release this manager.
	*/
	virtual void release() = 0;


	//////// impact ////////

	/**
	Simulation Filter data to be set on leaf chunk actors
	*/
	enum FilterDataAttributes
	{
		LEAF_CHUNK = 1,
	};


	//////// interface ////////

	/**
	Create a px family from the given descriptor.

	\param[in]	desc			The family descriptor (see ExtPxFamilyDesc).

	\return the created family, if the descriptor was valid and memory was available for the operation.  Otherwise,
	returns NULL.
	*/
	virtual ExtPxFamily* createFamily(const ExtPxFamilyDesc& desc) = 0;

	/**
	Create a px joint associated with TkJoint.

	ExtPxCreateJointFunction will be called after this call.
	ExtPxCreateJointFunction must be set, nothing will happen otherwise.

	\param[in]	joint			TkJoint to be used to create px joint.

	\return true iff Joint was created.
	*/
	virtual bool createJoint(TkJoint& joint) = 0;

	/**
	Destroy a px joint associated with TkJoint.

	\param[in]	joint			TkJoint to be used to destroy px joint.
	*/
	virtual void destroyJoint(TkJoint& joint) = 0;

	/**
	Set ExtPxCreateJointFunction to be used when new joints are being created.\

	\param[in]	createFn		Create function pointer to set, can be nullptr.
	*/
	virtual void setCreateJointFunction(ExtPxCreateJointFunction createFn) = 0;

	/**
	The number of families currently in this manager.

	\return the number of ExtPxFamily that currently exist in this manger.
	*/
	virtual uint32_t getFamilyCount() const = 0;

	/**
	Retrieve an array of pointers (into the user-supplied buffer) to families.

	\param[out]	buffer			A user-supplied array of ExtPxFamily pointers.
	\param[in]	bufferSize		The number of elements available to write into buffer.

	\return the number of ExtPxFamily pointers written to the buffer.
	*/
	virtual uint32_t getFamilies(ExtPxFamily** buffer, uint32_t bufferSize) const = 0;

	/**
	Look up an associated ExtPxFamily by TkFamily pointer.

	\param[in]	family			The TkFamily pointer to look up.

	\return pointer to the ExtPxFamily object if it exists, NULL otherwise.
	*/
	virtual ExtPxFamily* getFamilyFromTkFamily(TkFamily& family) const = 0;

	/**
	Look up an associated ExtPxActor by PxRigidDynamic pointer.

	\param[in]	pxActor			The PxRigidDynamic pointer to look up.

	\return pointer to the ExtPxActor object if it exists, NULL otherwise.
	*/
	virtual ExtPxActor* getActorFromPhysXActor(const physx::PxRigidDynamic& pxActor) const = 0;

	/**
	Get a PxPhysics object pointer used upon manager creation.

	\return a pointer to the (const) PxPhysics object.
	*/
	virtual physx::PxPhysics& getPhysics() const = 0;

	/**
	Get a TkFramework object pointer used upon manager creation.

	\return a pointer to the TkFramework object.
	*/
	virtual TkFramework& getFramework() const = 0;

	/**
	Get if useUserData was set upon manager creation.

	\return true iff PxActor userData is used by manager.
	*/
	virtual bool isPxUserDataUsed() const = 0;

	/**
	Limits the total number of actors that can exist at a given time.  A value of zero disables this (gives no limit).

	\param[in]	limit			If not zero, the maximum number of actors that will be allowed to exist.
	*/
	virtual void setActorCountLimit(uint32_t limit) = 0;

	/**
	Retrieve the limit to the total number of actors that can exist at a given time.  A value of zero disables this
	(gives no limit).

	\return the limit to the total number of actors that can exist at a given time (or zero if there is no limit).
	*/
	virtual uint32_t getActorCountLimit() = 0;

	/**
	The total number of PxActors generated by Blast.

	\return the total number of PxActors generated by Blast.
	*/
	virtual uint32_t getPxActorCount() const = 0;

	/**
	Add a user implementation of ExtPxListener to this family's list of listeners.

	\param[in]	listener		The event listener to add.
	*/
	virtual void subscribe(ExtPxListener& listener) = 0;

	/**
	Remove a user implementation of ExtPxListener from this family's list of listeners.

	\param[in]	listener		The event listener to remove.
	*/
	virtual void unsubscribe(ExtPxListener& listener) = 0;
};


}  // namespace Blast
}  // namespace Nv


#endif  // ifndef NVBLASTEXTPXMANAGER_H