#include "SevSeg.h"
#include <RTClib.h>

SevSeg sevseg;
RTC_DS1307 rtc;

int lastMillis = 0;
int addMin = 0;
int addHour = 0;
int buttonState;

void setup() {
  byte numDigits = 4;
  byte digitPins[] = {2, 3, 4, 5};
  byte segPins[] = {6, 7, 8, 9, 10, 11, 12, 13};
  bool resistorOnSegments = false;
  byte hardwareConfig = COMMON_ANODE;
  bool updateWithDelays = false;
  bool leadingZeros = true;
  bool disableDecPoint = true;

  sevseg.begin(hardwareConfig, numDigits, digitPins, segPins, resistorOnSegments, updateWithDelays, 
  leadingZeros, disableDecPoint);
  sevseg.setBrightness(90);

  pinMode(13, OUTPUT);
  pinMode(A3, INPUT_PULLUP);

  Serial.begin(9600);

  if (! rtc.begin()){
    Serial.println("RTC not found");
    Serial.flush();
    abort();
  }
}

void displayCurrentTime(){
  DateTime now = rtc.now();

  if ((millis() - lastMillis) >= 1000){
    lastMillis = millis();
    if (digitalRead(13) == HIGH){
      digitalWrite(13, LOW);
    } else {
      digitalWrite(13, HIGH);
    }
  }
  sevseg.setNumber(now.minute() + addMin + ((now.hour() + addHour)*100));
}

void loop() {
  sevseg.refreshDisplay();

  
  displayCurrentTime();
}

// TODO
// implement button debounce 
// make buttons for changing time
// make a button for reseting time to current rtc time
// make alarm