#ifndef _WALKTHROUGHRECORDER_H__
#define _WALKTHROUGHRECORDER_H__

#include "common.h"
#include <fstream>
#include "Vector3.h"


namespace CHCDemoEngine
{

class Camera;

struct FrameInfo
{
	FrameInfo(const Vector3 &pos, const Vector3 &dir):
	mPosition(pos), mDirection(dir)
	{}

	FrameInfo() {}


	/////////////

	Vector3 mPosition;
	Vector3 mDirection;

	friend std::ostream& operator<< (std::ostream &s, const FrameInfo &A);
	friend std::istream& operator>> (std::istream &s, FrameInfo &A);
};


/// Overload << operator for C++-style output
inline std::ostream& operator<< (std::ostream &s, const FrameInfo &A)
{
	return s << A.mPosition << " " << A.mDirection;
}


/// Overload >> operator for C++-style input
inline std::istream& operator>> (std::istream &s, FrameInfo &A)
{
	return s >> A.mPosition >> A.mDirection;
}


/** Records given walkthrough
*/
class WalkThroughRecorder
{
public:
	/** Writes walkthrough frames to file.
	*/
	WalkThroughRecorder(const std::string &filename);

	~WalkThroughRecorder();

	/** Writes current camera data.
	*/
	void WriteFrame(Camera *cam);
	

protected:

	std::ofstream mFile;
};


/** Replays a given walkthrough
*/
class WalkThroughPlayer
{
public:
	/** Writes walkthrough frames to file.
	*/
	WalkThroughPlayer(const std::string &filename);
	/** Reads next frame. returns false if end of recorded frames is reached.
	*/
	bool ReadNextFrame(Camera *cam);


protected:

	std::vector<FrameInfo> mFrameInfos;

	int mFrame;
};


}

#endif