/* Copyright 2003-2005 ROBLOX Corporation, All Rights Reserved */

#pragma once

#include "v8kernel/ContactConnector.h"
#include "v8world/Contact.h"
#include "v8world/CellContact.h"

#include "BulletCollision/BroadphaseCollision/btCollisionAlgorithm.h"
#include "BulletCollision/CollisionDispatch/btCollisionObject.h"

class btPersistentManifold;

namespace RBX {

class BulletConnector: public ContactConnector, public Allocator<BulletConnector>
{
public:
	BulletConnector(Body* b0, Body* b1, const ContactParams& contactParams, int manifoldIndex, int cacheIndex);

	int bulletManifoldIndex;
	int bulletPointCacheIndex;
};

typedef FixedArray<BulletConnector*, 4> BulletConnectorArray;

class BulletContact: public Contact
{
public:
	BulletContact(World* world, Primitive* p0, Primitive* p1);
	~BulletContact();
	
	// Contact
	void deleteAllConnectors() override;
	int numConnectors() const override;
	ContactConnector* getConnector(int i) override;

	bool computeIsColliding(float overlapIgnored) override;
	bool stepContact() override;
	
	void invalidateContactCache() override;

private:
    World* world;

    btCollisionAlgorithm* algorithm;

    btManifoldArray manifoldArray;
	BulletConnectorArray connectors;
};

class BulletCellContact: public CellContact
{
public:
    BulletCellContact(World* world, Primitive* p0, Primitive* p1, const Vector3int32& feature, const shared_ptr<btCollisionShape>& cellShape);
    ~BulletCellContact();

    // Contact
    void deleteAllConnectors() override;
    int numConnectors() const override;
    ContactConnector* getConnector(int i) override;
    
    bool computeIsColliding(float overlapIgnored) override;
    bool stepContact() override;
    
    void invalidateContactCache() override;
	void onPrimitiveContactParametersChanged() override;   

private:
    World* world;
    
    btCollisionAlgorithm* algorithm;
    
    btManifoldArray manifoldArray;
    BulletConnectorArray connectors;

    btCollisionObject cellCollisionObject; // collision object for the cell involved in contact
    shared_ptr<btCollisionShape> cellShape;

	void updateContactParemeters(btCollisionObject* cellObj);
};

} // namespace