#include <SPI.h>
#include <Wire.h>
#include <Adafruit_GFX.h>
#include <Adafruit_SSD1306.h>
#include "RTClib.h"
uint8_t month, day, hour, minute, second;
uint16_t year;
RTC_DS3231 rtc;
//char daysOfTheWeek[7][12] = {"Sun", "Mon", "Tue", "Wed", "Thu", "Fri", "Sat"};

#define SCREEN_WIDTH 128  // OLED display width, in pixels
#define SCREEN_HEIGHT 64  // OLED display height, in pixels
#define OLED_RESET    -1  // Reset pin # (or -1 if sharing reset pin)
#define CT_pin 2
char dddd = 17 ;
//************Button that will be used on Arduino Pins*****************//
int P1 = 14; // Button SET MENU'
int P2 = 12; // Button +
int P3 = 13; // Button -

//************Variables Used Including New Debounce Variable**************//
int hourupg;
int minupg;
int yearupg;
int monthupg;
int dayupg;
int menu=0;
const int debounce = 100;
Adafruit_SSD1306 display(SCREEN_WIDTH, SCREEN_HEIGHT, &Wire, OLED_RESET);
void setup() 
{

Serial.begin(9600);
pinMode(CT_pin, OUTPUT);
pinMode(P1,INPUT);
pinMode(P2,INPUT);
pinMode(P3,INPUT);
if (! rtc.begin()) {
Serial.println("Couldn't find RTC");
while (1);
}

if(!display.begin(SSD1306_SWITCHCAPVCC, 0x3C)) 
{ 
    Serial.println(F("SSD1306 allocation failed"));
    for(;;); // Don't proceed, loop forever
}
rtc.adjust(DateTime(__DATE__, __TIME__));
//rtc.adjust(DateTime(2023, 9, 9, 11, 15, 45));

display.display();
delay(2);
display.clearDisplay();
display.clearDisplay();
display.setTextColor(WHITE);
//display.startscrollright(0x00, 0x0F);
display.setTextSize(3);
display.setCursor(0,5);
display.print(" Clock ");
display.display();
delay(1000);
}

void loop()
{
// in which subroutine should we go?
  if (menu==0)
    {
     DisplayDateTime(); // void DisplayDateTime
    }
  if (menu==1)
    {
    DisplaySetHour();
    }
  if (menu==2)
    {
    DisplaySetMinute();
    }
  if (menu==3)
    {
    DisplaySetYear();
    }
  if (menu==4)
    {
    DisplaySetMonth();
    }
  if (menu==5)
    {
    DisplaySetDay();
    }
  if (menu==6)
    {
    StoreAgg(); 
    //delay(500);
    menu=0;
    }
    delay(50);
}

void DisplayDateTime ()
{
// We show the current date and time
  DateTime now = rtc.now();
  display.clearDisplay();

  if(digitalRead(P1)){
   menu=1;
   delay(debounce);
  }
  display.setTextSize(2);

  display.setCursor(5,0);
  if (now.hour()<=9)
  {
  display.println("0");
  display.setCursor(20,0);
  }
  display.print(now.hour(), DEC);
  hourupg=now.hour();
  display.setCursor(35,0);
  display.print(":");

  display.setCursor(50,0);
  if (now.minute()<=9)
  {
    display.print("0");
    display.setCursor(65,0);
  }
  display.print(now.minute(), DEC);
  minupg=now.minute();
  display.setCursor(80,0);
  display.print(":");
  if(digitalRead(P1)){
   menu=1;
   delay(debounce);
  }

  display.setCursor(95,0);
  if (now.second()<=9)
  {
    display.print("0");
    display.setCursor(110,0);
  }
  display.print(now.second(), DEC);

  display.setCursor(0,25);
  if (now.day()<=9)
  {
    display.print("0");
    display.setCursor(14,25);
  }
  display.print(now.day(), DEC);
  dayupg=now.day();

  if(digitalRead(P1)){
   menu=1;
   delay(debounce);
  }
  display.setCursor(36,25);
  if (now.month()<=9)
  {
    display.print("0");
    display.setCursor(50,25);
  }
  display.print(now.month(), DEC);
  monthupg=now.month();

  display.setCursor(75,25);
  display.print(now.year(), DEC);
  yearupg=now.year();

if(digitalRead(P1)){
   menu=1;
   delay(debounce);
}
display.display();
}

void DisplaySetHour()
{
// time setting

  while(!digitalRead(P1)){
  if(digitalRead(P2)==HIGH)
  {
    if(hourupg==23)
    {
      hourupg=0;
    }
    else
    {
      hourupg=hourupg+1;
    }
    delay(debounce);
  
  }
   if(digitalRead(P3)==HIGH)
  {
    if(hourupg==0)
    {
      hourupg=23;
    }
    else
    {
      hourupg=hourupg-1;
    }
    delay(debounce);
  }
  display.clearDisplay();
  display.setCursor(0,0);
  display.print("Set Hour:");
  display.setCursor(0,25);
  display.print(hourupg,DEC);
  display.print(" ");
  display.display();
  }
     menu=2;
     delay(debounce);
}

void DisplaySetMinute()
{
// Setting the minutes

  while(!digitalRead(P1)){
    if(digitalRead(P2)==HIGH)
    {
      if (minupg==59)
      {
        minupg=0;
      }
      else
      {
        minupg=minupg+1;
      }
      delay(debounce);
    }
     if(digitalRead(P3)==HIGH)
    {
      if (minupg==0)
      {
        minupg=59;
      }
      else
      {
        minupg=minupg-1;
      }
      delay(debounce);
    }
  display.clearDisplay();
  display.setCursor(0,0);
  display.print("Set Minute:");
  display.setCursor(0,25);
  display.print(minupg,DEC);
  display.print(" ");
  display.display();
  //delay(200);
  }
  menu=3;
  delay(debounce);
}
  
void DisplaySetYear()
{
// setting the year

  while(!digitalRead(P1)){
    if(digitalRead(P2)==HIGH)
    {    
      yearupg=yearupg+1;
    }
     if(digitalRead(P3)==HIGH)
    {
      yearupg=yearupg-1;
    }
    delay(debounce);
    display.clearDisplay();
    display.setCursor(0,0);
    display.print("Set Year:");
    display.setCursor(0,25);
    display.print(yearupg,DEC);
    display.print(" ");
    display.display();
  }
     menu=4;
     delay(debounce);
}

void DisplaySetMonth()
{
// Setting the month

  while(!digitalRead(P1)){
    if(digitalRead(P2)==HIGH)
    {
      if (monthupg==12)
      {
        monthupg=1;
      }
      else
      {
        monthupg=monthupg+1;
      }
    }
     if(digitalRead(P3)==HIGH)
    {
      if (monthupg==1)
      {
        monthupg=12;
      }
      else
      {
        monthupg=monthupg-1;
      }
    }
  display.clearDisplay();
  display.setCursor(0,0);
  display.print("Set Month:");
  display.setCursor(0,25);
  display.print(monthupg,DEC);
  display.print(" ");
  display.display();
  delay(debounce);
  }
     menu=5;
     delay(debounce);
     //delay(200);
}

void DisplaySetDay()
{
// Setting the day

  delay(debounce);
  while(!digitalRead(P1)){
    
    if(digitalRead(P2)==HIGH)
    {
      if (dayupg==31)
      {
        dayupg=1;
      }
      else
      {
        dayupg=dayupg+1;
      }
    }
     if(digitalRead(P3)==HIGH)
    {
      if (dayupg==1)
      {
        dayupg=31;
      }
      else
      {
        dayupg=dayupg-1;
      }
    }
    display.clearDisplay();
    display.setCursor(0,0);
    display.print("Set Day:");
    display.setCursor(0,25);
    display.print(dayupg,DEC);
    display.print(" ");
    display.display();
    delay(debounce);
  }
     menu=6;
     delay(debounce);
}

void StoreAgg()
{
// Variable saving
  display.clearDisplay();
  display.setCursor(0,0);
  display.print("SAVING IN");
  display.setCursor(0,25);
  display.print("PROGRESS");
  rtc.adjust(DateTime(yearupg,monthupg,dayupg,hourupg,minupg,0));
  display.display();
  delay(500);
}