#include "SevSeg.h"
SevSeg sevseg;

int LDR1pin = A0;
int LDR2pin = A1;

#define HELLO_MAX_NUM_STR 9
#define MAX_STR_SIZE 4
char HELLO[HELLO_MAX_NUM_STR][MAX_STR_SIZE];

#define BYE_MAX_NUM_STR 7
char BYE[BYE_MAX_NUM_STR][MAX_STR_SIZE];

#define PATTERN_CHANGE_TIME 500/2
unsigned long timer = millis() - PATTERN_CHANGE_TIME;
byte STRPos1 = 0;
byte STRPos2 = 0;

void setup() {
   byte numDigits = 4;
   byte digitPins[] = {9, 10, 11, 12};
   byte segmentPins[] = {2, 3, 4, 5, 6, 7, 8, 13};
   bool resistorsOnSegments = false;
   byte hardwareConfig = COMMON_CATHODE;
   bool updateWithDelays = false;
   bool leadingZeros = false;

   sevseg.begin(hardwareConfig, numDigits, digitPins, segmentPins, resistorsOnSegments, updateWithDelays, leadingZeros);
   sevseg.setBrightness(10);

   strcpy(HELLO[1], "O   ");
   strcpy(HELLO[2], "LO  ");
   strcpy(HELLO[3], "LLO ");
   strcpy(HELLO[4], "ELLO");
   strcpy(HELLO[5], "HELL");
   strcpy(HELLO[6], " HEL");
   strcpy(HELLO[7], "  HE");
   strcpy(HELLO[8], "   H");

   strcpy(BYE[0], "   B");
   strcpy(BYE[1], "  BY");
   strcpy(BYE[2], " BYE");
   strcpy(BYE[3], "BYE ");
   strcpy(BYE[4], "YE  ");
   strcpy(BYE[5], "E   ");
   strcpy(BYE[6], "");

}

void loop() {
   int LDR1 = analogRead(LDR1pin);
   int LDR2 = analogRead(LDR2pin);
   if (LDR1 <= 200 && LDR2 > 300){
      STRPos2 = 0;
      
      if (millis() > (timer + PATTERN_CHANGE_TIME)) {
         sevseg.setChars(HELLO[STRPos1]);
         STRPos1++;
         if (STRPos1 >= HELLO_MAX_NUM_STR) STRPos1 = 0;
         timer = millis();
      }
   } else if (LDR2 <= 300 && LDR1 > 300){
      STRPos1 = 1;
      if (millis() > (timer + PATTERN_CHANGE_TIME)) {
         sevseg.setChars(BYE[STRPos2]);
         STRPos2++;
         if (STRPos2 >= BYE_MAX_NUM_STR) STRPos2 = 0;
         timer = millis();
      }
   } else {
      STRPos1 = 0;
      STRPos2 = 0;
      sevseg.setChars("    ");
    }
   
   sevseg.refreshDisplay(); 
}