#include "Arduino.h"
#include "uRTCLib.h"

uRTCLib rtc(0x68);
const int pinClockMode = A0;
const int pinMinus = A1;
const int pinPlus = A2;
const int pinSet = A3;

const int pinAM = A4;
const int pinPM = A5;

const int pinM1 = 0;
const int pinM2 = 1;
const int pinM4 = 2;
const int pinM8 = 3;

const int pinM10 = 4;
const int pinM20 = 5;
const int pinM40 = 6;

const int pinH1 = 7;
const int pinH2 = 8;
const int pinH4 = 9;
const int pinH8 = 10;

const int pinH10 = 11;
const int pinH20 = 12;

// States
const int STATE_RESET       = 0;
const int STATE_SET_HOURS   = 1;
const int STATE_SET_MINUTES = 2;
const int STATE_SET_MODE    = 3;
const int STATE_RUN         = 4;

// Clock Modes
const int MODE_12H = 0;
const int MODE_24H = 1;

// Buttons
const int MODE = 0;
const int PLUS = 1;
const int MINUS = 2;
const int SET = 3;

int seconds = 0;
int minutes = 0;
int hours = 0;

void writeTime(int hours, int minutes, int mode, int overrideHours = HIGH, int overrideMinutes = HIGH, int overrideMode = HIGH);

void setup() {
  pinMode(pinClockMode, INPUT);
  pinMode(pinMinus, INPUT);
  pinMode(pinPlus, INPUT);
  pinMode(pinSet, INPUT);

  pinMode(pinAM, OUTPUT);
  pinMode(pinPM, OUTPUT);

  for (int i = pinM1; i <= pinH20; i++)
  {
    pinMode(i, OUTPUT);
  }
  // put your setup code here, to run once:
  Serial.begin(9600);
  delay(3000); 
  URTCLIB_WIRE.begin();
  rtc.set(0, 0, 0, 5, 13, 1, 22);
  delay(1000); 
}

void loop() {

  // Serial.begin(9600);
  rtc.refresh();
  hours = rtc.hour();
  minutes = rtc.minute();
  seconds = rtc.second();

  // Serial.end();
  writeTime(hours, seconds, MODE_24H);
  digitalWrite(pinAM, HIGH);
  digitalWrite(pinPM, LOW);


  // Serial.print("Current Date & Time: ");
  // Serial.print(rtc.year());
  // Serial.print('/');
  // Serial.print(rtc.month());
  // Serial.print('/');
  // Serial.print(rtc.day());

  // Serial.print(" ");

  // Serial.print(hours);
  // Serial.print(':');
  // Serial.print(minutes);
  // Serial.print(':');
  // Serial.println(seconds);
  // delay(1000); 


}

void writeTime(int hours, int minutes, int mode, int overrideHours, int overrideMinutes, int overrideMode) {
  int modHours = hours;
  if (mode == MODE_12H) {
    modHours = hours % 12;
    if (modHours == 0) {
      modHours = 12;
    }
  }


  digitalWrite(pinM1, ((minutes % 10) & 1) * overrideMinutes);
  digitalWrite(pinM2, ((minutes % 10) & 2) * overrideMinutes);
  digitalWrite(pinM4, ((minutes % 10) & 4) * overrideMinutes);
  digitalWrite(pinM8, ((minutes % 10) & 8) * overrideMinutes);

  digitalWrite(pinM10, ((minutes / 10) & 1) * overrideMinutes);
  digitalWrite(pinM20, ((minutes / 10) & 2) * overrideMinutes);
  digitalWrite(pinM40, ((minutes / 10) & 4) * overrideMinutes);

  digitalWrite(pinH1, ((modHours % 10) & 1) * overrideHours);
  digitalWrite(pinH2, ((modHours % 10) & 2) * overrideHours);
  digitalWrite(pinH4, ((modHours % 10) & 4) * overrideHours);
  digitalWrite(pinH8, ((modHours % 10) & 8) * overrideHours);

  digitalWrite(pinH10, ((modHours / 10) & 1) * overrideHours);
  digitalWrite(pinH20, ((modHours / 10) & 2) * overrideHours);

  int stateAM = LOW;
  int statePM = LOW;
  if (mode == MODE_12H) {
    if (hours < 12) {
      stateAM = HIGH;
    } else {
      statePM = HIGH;
    }
  }

  digitalWrite(pinAM, stateAM * overrideMode);
  digitalWrite(pinPM, statePM * overrideMode);

  // if (mode == MODE_12H) {
  //   sprintf(logBuffer, "12H Time: %d:%d", modHours, minutes);
  // } else {
  //   sprintf(logBuffer, "24H Time: %d:%d", modHours, minutes);
  // }
  // log(logBuffer);
}