// Implements a class to draw and animate a pair of eyes
#ifndef MDEYEPAIR_H
#define MDEYEPAIR_H

#include <MD_MAX72xx.h>
#include <TrueRandom.h>

// Misc defines
#define	EYEBALL_ROWS	8		// number of rows in the eyeball definition

class MD_EyePair
{
public:
	MD_EyePair(void);
	~MD_EyePair(void) { };

	void begin(uint8_t startdev, MD_MAX72XX *M, uint16_t maxDelay);
	void animate(void);

protected:
	// Pupil related information
	enum posPupil_t // Initials are for Top, Middle and Bottom; Left, Center and Right (eg, TL = Top Left)
	{
	  P_TL = 0, P_TC = 1, P_TR = 2, 
	  P_ML = 3, P_MC = 4, P_MR = 5,
	  P_BL = 6, P_BC = 7, P_BR = 8
	};
	
	// Class static data
	static uint8_t	_pupilData[];
	static uint8_t	_eyeballData[];

	// display parameters
	MD_MAX72XX	*_M;
	uint8_t		_sd;	// start device
	uint8_t		_ed;	// end device

	// blinking parameters
	uint32_t	_lastBlinkTime;
	uint16_t	_currentDelay;
	uint8_t		_blinkState;
	uint8_t		_savedEyeball[EYEBALL_ROWS];
	uint8_t		_blinkLine;

	// animation parameters
	posPupil_t	_pupilCurPos;		// the current position for the pupil
	uint32_t	_timeLast;
	uint16_t	_timeDelay;
	uint16_t	_maxDelay;
	bool		_inBlinkCycle;

	// methods
	void drawEyeball(void);
	bool blinkEyeball(bool bFirst);
	void drawPupil(posPupil_t posOld, posPupil_t posNew);
	bool posIsAdjacent(posPupil_t posCur, posPupil_t posNew);
};

#endif