#ifndef TRANDOM_INCLUDED
#define TRANDOM_INCLUDED

#include "tcommon.h"

#undef DVAPI
#undef DVVAR
#ifdef TNZCORE_EXPORTS
#define DVAPI DV_EXPORT_API
#define DVVAR DV_EXPORT_VAR
#else
#define DVAPI DV_IMPORT_API
#define DVVAR DV_IMPORT_VAR
#endif

/*! Generates a pseudorandom sequence
*/
class DVAPI TRandom
{
public:
	TRandom(UINT seed = 0);
	~TRandom();

	/*! resets the pseudorandom engine to the first number of the sequence */
	void reset();

	/*! set a new seed for the pseudorandom engine and reset the sequence */
	void setSeed(UINT seed);

	/*! returns an unsigned integer number in the range [0, end[ */
	UINT getUInt(UINT end = c_maxuint); // [0,end[

	/*! returns an integer number in the range [begin, end[ */
	int getInt(int begin, int end);

	/*! returns a float number in the range [0, 1[ */
	float getFloat();

	/*! returns a float number in the range [0, end[ */
	float getFloat(float end);

	/*! returns a float number in the range [begin, end[ */
	float getFloat(float begin, float end);

	/*! returns a random bool value */
	bool getBool();

	/*! returns a double number in the range [0, 1[ */
	double getDouble();

private:
	UINT seed;
	int idx1, idx2;
	UINT ran[56];

	enum RANDOM_FLOAT_TYPE {
		RANDOM_FLOAT_TYPE_NONE,
		RANDOM_FLOAT_TYPE_1,
		RANDOM_FLOAT_TYPE_2,
		RANDOM_FLOAT_TYPE_HOW_MANY
	};

	static RANDOM_FLOAT_TYPE RandomFloatType;

	inline UINT getNextUINT();
	inline void setRandomFloatType();
};

#endif //TRANDOM_INCLUDED