#include "SevSeg.h"

SevSeg sDisp;
int time, hours, minutes;
byte OB1, OB2, NB1, NB2, NM, OM, SM;

void setup() {
  pinMode(A5, INPUT);
  pinMode(A4, INPUT);
  pinMode(A3, INPUT);

  pinMode(1, OUTPUT);
  pinMode(2, OUTPUT);
  pinMode(3, OUTPUT);
  pinMode(4, OUTPUT);
  pinMode(5, OUTPUT);
  pinMode(6, OUTPUT);
  pinMode(7, OUTPUT);
  pinMode(8, OUTPUT);
  pinMode(9, OUTPUT);
  pinMode(10, OUTPUT);
  pinMode(11, OUTPUT);
  pinMode(12, OUTPUT);
  pinMode(13, OUTPUT);

  byte numDigits = 4;
  byte digitPins[] = {2, 3, 4, 5};
  byte segmentPins[] = {6, 7, 8, 9, 10, 11, 12, 13};
  bool resistorsOnSegments = false;
  byte hardwareConfig = COMMON_ANODE;
  bool updateWithDelays = false;
  bool leadingZeros = true;
  bool disableDecPoint = false;

  sDisp.begin(hardwareConfig, numDigits, digitPins, segmentPins, resistorsOnSegments,
  updateWithDelays, leadingZeros, disableDecPoint);
}

void loop() {
  delay(1);

  while(!digitalRead(A5) && !digitalRead(A4) && !digitalRead(A3)) {
    
    if (millis() % 60000 == 0) {
      delay(1);
      minutes = minutes + 1;

      if (minutes >= 60) {
        minutes = 0;
        hours = hours + 1;

        if (hours >= 24) {
          hours = 0;
          minutes = 0;
        }
      }
    }
    
    dispTime();
  }

  delay(1);

  NM = digitalRead(A3);

  if (NM && !OM) {
    if (SM == 0) {
      SM = 1;
      digitalWrite(1, HIGH);
    }

    else {
      SM = 0;
      digitalWrite(1, LOW);
    }

    OM = 1;
  }

  else if (!NM && OM) {
    OM = 0;
  }

  if (SM == 0) {
    NB1 = digitalRead(A5);

    if (NB1 && !OB1) {
      OB1 = 1;
      minutes = minutes + 1;
  
      if (minutes >= 60) {
        minutes = 0;
      }

      dispTime();
    }

    else if (!NB1 && OB1) {
      OB1 = 0;
    }

    NB2 = digitalRead(A4);

    if (NB2 && !OB2) {
      OB2 = 1;
      minutes = minutes - 1;
      
      if (minutes < 0) {
        minutes = 59;
      }

      dispTime();
    }

    else if (!NB2 && OB2) {
      OB2 = 0;
    }
  }

  else {
    NB1 = digitalRead(A5);

    if (NB1 && !OB1) {
      OB1 = 1;
      hours = hours + 1;
  
      if (hours >= 24) {
        hours = 0;
      }

      dispTime();
    }

    else if (!NB1 && OB1) {
      OB1 = 0;
    }

    NB2 = digitalRead(A4);

    if (NB2 && !OB2) {
      OB2 = 1;
      hours = hours - 1;
  
      if (hours < 0) {
        hours = 23;
      }

      dispTime();
    }

    else if (!NB2 && OB2) {
      OB2 = 0;
    }
  }
}

void dispTime() {
  time = hours * 100;
  time = time + minutes;

  sDisp.setNumber(time, 2);
  sDisp.refreshDisplay();
}