/*
* Copyright (c) 2006-2009 Erin Catto http://www.box2d.org
*
* This software is provided 'as-is', without any express or implied
* warranty.  In no event will the authors be held liable for any damages
* arising from the use of this software.
* Permission is granted to anyone to use this software for any purpose,
* including commercial applications, and to alter it and redistribute it
* freely, subject to the following restrictions:
* 1. The origin of this software must not be misrepresented; you must not
* claim that you wrote the original software. If you use this software
* in a product, an acknowledgment in the product documentation would be
* appreciated but is not required.
* 2. Altered source versions must be plainly marked as such, and must not be
* misrepresented as being the original software.
* 3. This notice may not be removed or altered from any source distribution.
*/

#ifndef TEST_H
#define TEST_H

#include "box2d/box2d.h"
#include "extensions/cocos-ext.h"

#include <cstdlib>

class Test;
struct Settings;



#define	RAND_LIMIT	32767
#define DRAW_STRING_NEW_LINE 25

/// Random number in range [-1,1]
inline float RandomFloat()
{
	float r = (float)(std::rand() & (RAND_LIMIT));
	r /= RAND_LIMIT;
	r = 2.0f * r - 1.0f;
	return r;
}

/// Random floating point number in range [lo, hi]
inline float RandomFloat(float lo, float hi)
{
	float r = (float)(std::rand() & (RAND_LIMIT));
	r /= RAND_LIMIT;
	r = (hi - lo) * r + lo;
	return r;
}

/// Test settings. Some can be controlled in the GUI.
//struct Settings
//{
//	Settings()
//	{
//		viewCenter.Set(0.0f, 20.0f);
//		hz = 60.0f;
//		velocityIterations = 8;
//		positionIterations = 3;
//		drawShapes = 1;
//		drawJoints = 1;
//		drawAABBs = 0;
//		drawContactPoints = 0;
//		drawContactNormals = 0;
//		drawContactImpulse = 0;
//		drawFrictionImpulse = 0;
//		drawCOMs = 0;
//		drawStats = 0;
//		drawProfile = 0;
//		enableWarmStarting = 1;
//		enableContinuous = 1;
//		enableSubStepping = 0;
//		enableSleep = 1;
//		pause = 0;
//		singleStep = 0;
//	}
//
//	b2Vec2 viewCenter;
//	float hz;
//	int32 velocityIterations;
//	int32 positionIterations;
//	int32 drawShapes;
//	int32 drawJoints;
//	int32 drawAABBs;
//	int32 drawContactPoints;
//	int32 drawContactNormals;
//	int32 drawContactImpulse;
//	int32 drawFrictionImpulse;
//	int32 drawCOMs;
//	int32 drawStats;
//	int32 drawProfile;
//	int32 enableWarmStarting;
//	int32 enableContinuous;
//	int32 enableSubStepping;
//	int32 enableSleep;
//	int32 pause;
//	int32 singleStep;
//};


// This is called when a joint in the world is implicitly destroyed
// because an attached body is destroyed. This gives us a chance to
// nullify the mouse joint.
class DestructionListener : public b2DestructionListener
{
public:
	void SayGoodbye(b2Fixture* fixture) { B2_NOT_USED(fixture); }
	void SayGoodbye(b2Joint* joint);

	Test* test;
};

const int32 k_maxContactPoints = 2048;
//
//struct ContactPoint
//{
//	b2Fixture* fixtureA;
//	b2Fixture* fixtureB;
//	b2Vec2 normal;
//	b2Vec2 position;
//	b2PointState state;
//	float normalImpulse;
//	float tangentImpulse;
//	float separation;
//};
class Test : public b2ContactListener
{
public:

	Test();
	virtual ~Test();

	void DrawTitle(const char* string);
	virtual void Step(Settings* settings);
	virtual void UpdateUI() {}
	virtual void Keyboard(int key) { B2_NOT_USED(key); }
	virtual void KeyboardUp(int key) { B2_NOT_USED(key); }
	void ShiftMouseDown(const b2Vec2& p);
	virtual void MouseDown(const b2Vec2& p);
	virtual void MouseUp(const b2Vec2& p);
	virtual void MouseMove(const b2Vec2& p);
	void LaunchBomb();
	void LaunchBomb(const b2Vec2& position, const b2Vec2& velocity);

	void SpawnBomb(const b2Vec2& worldPt);
	void CompleteBombSpawn(const b2Vec2& p);

	// Let derived tests know that a joint was destroyed.
	virtual void JointDestroyed(b2Joint* joint) { B2_NOT_USED(joint); }

	// Callbacks for derived classes.
	virtual void BeginContact(b2Contact* contact)  override { B2_NOT_USED(contact); }
	virtual void EndContact(b2Contact* contact)  override { B2_NOT_USED(contact); }
	virtual void PreSolve(b2Contact* contact, const b2Manifold* oldManifold) override;
	virtual void PostSolve(b2Contact* contact, const b2ContactImpulse* impulse) override
	{
		B2_NOT_USED(contact);
		B2_NOT_USED(impulse);
	}

	void ShiftOrigin(const b2Vec2& newOrigin);

	DebugDraw g_debugDraw;
	b2World* m_world;

protected:
	friend class DestructionListener;
	friend class BoundaryListener;
	friend class ContactListener;

	b2Body* m_groundBody;
	b2AABB m_worldAABB;
	ContactPoint m_points[k_maxContactPoints];
	int32 m_pointCount;
	DestructionListener m_destructionListener;
	int32 m_textLine;

	b2Body* m_bomb;
	b2MouseJoint* m_mouseJoint;
	b2Vec2 m_bombSpawnPoint;
	bool m_bombSpawning;
	b2Vec2 m_mouseWorld;
	int32 m_stepCount;
	int32 m_textIncrement;
	b2Profile m_maxProfile;
	b2Profile m_totalProfile;
};

typedef Test* TestCreateFcn();

int RegisterTest(const char* category, const char* name, TestCreateFcn* fcn);

//
struct TestEntry
{
	const char* category;
	const char* name;
	TestCreateFcn* createFcn;
};

#define MAX_TESTS 256
extern TestEntry g_testEntries[MAX_TESTS];
extern int g_testCount;

#endif