#include <Wire.h>
#include<EEPROM.h>
#include <RTClib.h>
#include <LiquidCrystal_I2C.h>
LiquidCrystal_I2C lcd(0x27,16,2);
RTC_DS1307 RTC;

int temp,inc,hours1,minut,add=11;
int P1=6; // Button SET MENU'
int P2=7; // Button +
int P3=8; // Button -

int hourupg;
int minupg;
int yearupg;
int monthupg;
int dayupg;
int menu=0;
const int debounce = 500;

void setup()
{
 Wire.begin();
 RTC.begin();
 lcd.init();
 lcd.clear();
 lcd.backlight();
 pinMode(P1,INPUT);
 pinMode(P2,INPUT);
 pinMode(P3,INPUT);

   lcd.setCursor(0,0);
   lcd.print("Clock");
   lcd.setCursor(0,1);
   lcd.print("S.Sinha");
   delay(2000);

if (! RTC.isrunning()) 
 {
   RTC.adjust(DateTime(__DATE__, __TIME__));
 }
}

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();
  if(digitalRead(P1)){
   menu=1;
   delay(debounce);
  }
  lcd.setCursor(0, 1);
  lcd.print("Hour:");
  if (now.hour()<=9)
  {
    lcd.print("0");
  }
  lcd.print(now.hour(), DEC);
  hourupg=now.hour();
  lcd.print(":");
  if (now.minute()<=9)
  {
    lcd.print("0");
  }
  lcd.print(now.minute(), DEC);
  minupg=now.minute();
  lcd.print(":");
  if(digitalRead(P1)){
   menu=1;
   delay(debounce);
  }
  if (now.second()<=9)
  {
    lcd.print("0");
  }
  lcd.print(now.second(), DEC);

  lcd.setCursor(0, 0);
  lcd.print("Date: ");
  if (now.day()<=9)
  {
    lcd.print("0");
  }
  lcd.print(now.day(), DEC);
  dayupg=now.day();
  lcd.print("/");
  if(digitalRead(P1)){
   menu=1;
   delay(debounce);
  }
  if (now.month()<=9)
  {
    lcd.print("0");
  }
  lcd.print(now.month(), DEC);
  monthupg=now.month();
  lcd.print("/");
  lcd.print(now.year(), DEC);
  yearupg=now.year();

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

void DisplaySetHour()
{
// time setting
  lcd.clear();
  DateTime now = RTC.now();
  
  lcd.setCursor(0,0);
  lcd.print("Set Hour:");
  lcd.setCursor(0,1);
  lcd.print(hourupg,DEC);
 
  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);
  }
  DateTime now = RTC.now();
  lcd.setCursor(0,0);
  lcd.print("Set Hour:");
  lcd.setCursor(0,1);
  lcd.print(hourupg,DEC);
  lcd.print(" ");
  }
     menu=2;
     delay(debounce);
}

void DisplaySetMinute()
{
// Setting the minutes

  lcd.clear();

  lcd.setCursor(0,0);
  lcd.print("Set Minutes:");
  lcd.setCursor(0,1);
  lcd.print(minupg,DEC);


  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);
    }
  lcd.setCursor(0,0);
  lcd.print("Set Minutes:");
  lcd.setCursor(0,1);
  lcd.print(minupg,DEC);
  lcd.print(" ");
  //delay(200);
  }
  menu=3;
  delay(debounce);
}
  
void DisplaySetYear()
{
// setting the year
  lcd.clear();
  lcd.setCursor(0,0);
  lcd.print("Set Year:");
  lcd.setCursor(0,1);
  lcd.print(yearupg,DEC);

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

void DisplaySetMonth()
{
// Setting the month
  lcd.clear();
  lcd.setCursor(0,0);
  lcd.print("Set Month:");
  lcd.setCursor(0,1);
  lcd.print(monthupg,DEC);
  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;
      }
    }
  
  lcd.setCursor(0,0);
  lcd.print("Set Month:");
  lcd.setCursor(0,1);
  lcd.print(monthupg,DEC);
  lcd.print(" ");
  delay(debounce);
  }
     menu=5;
     delay(debounce);
     //delay(200);
}

void DisplaySetDay()
{
// Setting the day
  lcd.clear();
  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;
      }
    }
    lcd.setCursor(0,0);
    lcd.print("Set Day:");
    lcd.setCursor(0,1);
    lcd.print(dayupg,DEC);
    lcd.print(" ");
    delay(debounce);
  }
     menu=6;
     delay(debounce);
}

void StoreAgg()
{
// Variable saving
  lcd.clear();
  lcd.setCursor(0,0);
  lcd.print("SAVING IN");
  lcd.setCursor(0,1);
  lcd.print("PROGRESS");
  RTC.adjust(DateTime(yearupg,monthupg,dayupg,hourupg,minupg,0));
  delay(200);
}