//#include <Wire.h>
#include <EEPROM.h>
//#include <Adafruit_GFX.h>
#include <Adafruit_SSD1306.h>
#include <Fonts/FreeSerifBoldItalic12pt7b.h>
#include <Fonts/FreeSerifBoldItalic9pt7b.h>
#define FRAME_DELAY (4)
#define FRAME_WIDTH (32)
#define FRAME_HEIGHT (32)
#define FRAME_COUNT (sizeof(frames) / sizeof(frames[0]))
int frame = 0;
int lastClk = HIGH;
static unsigned long lastButtonPress2 = 0;
int toggle2=0;
// Define states for the state machine
unsigned long lastButtonPress = 0;
unsigned long lastScreenChangeTime = 0;
//const int debounceDelay = 50; // 50 milliseconds debounce delay
const unsigned long delayBetweenScreens = 3000; // 3 seconds delay between switching screens


const byte PROGMEM frames[][128] = {
  {0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,3,248,63,192,14,6,96,112,24,3,192,24,16,1,128,8,32,0,0,4,32,0,0,4,96,0,0,6,96,0,0,6,96,0,0,6,96,0,0,6,32,0,0,4,32,0,0,4,48,0,0,12,16,0,0,8,24,0,0,24,12,0,0,48,6,0,0,96,3,0,0,192,1,128,1,128,0,192,3,0,0,112,14,0,0,24,24,0,0,12,48,0,0,3,192,0,0,1,128,0,0,0,0,0,0,0,0,0},
  {0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,3,248,63,192,14,6,96,112,24,3,192,24,16,1,128,8,32,0,0,4,32,0,0,4,96,0,0,6,96,0,0,6,96,0,0,6,96,0,0,6,32,0,0,4,32,0,0,4,48,0,0,12,16,0,0,8,24,0,0,24,12,0,0,48,6,0,0,96,3,0,0,192,1,128,1,128,0,192,3,0,0,112,14,0,0,24,24,0,0,12,48,0,0,3,192,0,0,1,128,0,0,0,0,0,0,0,0,0},
  {0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,3,248,63,192,14,6,96,112,24,3,192,24,16,1,128,8,32,0,0,4,32,0,0,4,96,0,0,6,96,0,0,6,96,0,0,6,96,0,0,6,32,0,0,4,32,0,0,4,48,0,0,12,16,0,0,8,24,0,0,24,12,0,0,48,6,0,0,96,3,0,0,192,1,128,1,128,0,192,3,0,0,112,14,0,0,24,24,0,0,12,48,0,0,3,192,0,0,1,128,0,0,0,0,0,0,0,0,0},
  {0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,3,248,63,192,14,6,96,112,24,3,192,24,16,1,128,8,32,0,0,4,32,0,0,4,96,0,0,6,96,0,0,6,96,0,0,6,96,0,0,6,32,0,0,4,32,0,0,4,48,0,0,12,16,0,0,8,24,0,0,24,12,0,0,48,6,0,0,96,3,0,0,192,1,128,1,128,0,192,3,0,0,112,14,0,0,24,24,0,0,12,48,0,0,3,192,0,0,1,128,0,0,0,0,0,0,0,0,0},
  {0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,112,14,0,3,252,63,192,6,6,96,96,12,3,192,48,24,1,128,24,16,0,0,8,16,0,0,8,48,0,0,12,48,0,0,12,16,0,0,8,16,0,0,8,16,0,0,8,24,0,0,24,12,0,0,48,4,0,0,32,6,0,0,96,3,0,0,192,1,128,1,128,0,192,3,0,0,48,12,0,0,24,24,0,0,14,112,0,0,3,192,0,0,1,128,0,0,0,0,0,0,0,0,0,0,0,0,0},
  {0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,248,31,0,1,158,113,128,6,3,192,96,4,1,128,32,8,0,0,16,8,0,0,16,8,0,0,16,8,0,0,16,8,7,224,16,8,7,224,16,8,7,224,16,4,3,192,32,6,1,128,96,2,0,0,64,1,0,0,128,0,128,1,0,0,64,2,0,0,48,12,0,0,24,24,0,0,12,48,0,0,3,192,0,0,1,128,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0},
  {0,0,0,0,0,0,0,0,0,0,0,0,0,64,2,0,15,248,31,240,28,7,224,56,48,3,192,12,96,1,128,6,64,0,0,2,192,0,0,3,128,62,124,1,128,127,254,1,128,255,255,1,128,255,255,1,128,255,255,1,192,255,255,3,64,127,254,2,64,127,254,2,96,63,252,6,48,63,248,12,16,15,240,8,24,7,224,24,12,3,192,48,22,0,0,96,3,0,0,192,0,192,3,134,3,96,6,192,0,56,28,0,0,28,60,0,0,22,96,0,0,3,192,0,0,0,0,0},
  {0,0,0,0,0,0,0,0,0,64,2,0,16,1,130,16,24,1,128,16,3,248,63,192,15,254,127,240,31,255,255,248,31,255,255,248,63,255,255,252,63,255,255,252,127,255,255,254,127,255,255,254,127,255,255,254,127,255,255,254,63,255,255,252,63,255,255,252,63,255,255,252,31,255,255,248,31,255,255,248,15,255,255,240,7,255,255,224,3,255,255,192,49,255,255,128,0,255,255,4,0,127,254,0,2,31,248,64,6,15,240,96,0,3,192,0,0,49,132,0,0,32,0,0,0,0,0,0},
  {0,0,0,0,0,65,130,0,0,65,130,8,48,0,128,24,0,0,0,0,3,248,63,192,15,254,127,240,31,255,255,248,31,255,255,248,63,255,255,252,63,255,255,252,127,255,255,254,127,255,255,254,127,255,255,254,127,255,255,254,63,255,255,252,63,255,255,252,63,255,255,252,31,255,255,248,31,255,255,248,15,255,255,240,7,255,255,224,3,255,255,192,33,255,255,128,96,255,255,4,0,127,254,4,0,31,248,0,4,15,240,32,12,3,192,48,0,1,132,0,0,32,6,0,0,32,2,0},
  {0,64,130,0,0,65,130,0,32,0,0,8,48,0,0,8,0,0,0,0,3,248,63,192,15,254,127,240,31,255,255,248,31,255,255,248,63,255,255,252,63,255,255,252,127,255,255,254,127,255,255,254,127,255,255,254,127,255,255,254,63,255,255,252,63,255,255,252,63,255,255,252,31,255,255,248,31,255,255,248,15,255,255,240,7,255,255,224,3,255,255,192,1,255,255,128,64,255,255,4,0,127,254,6,0,31,248,0,0,15,240,0,12,3,192,48,8,1,128,16,0,32,2,0,0,96,2,0},
  {0,64,130,0,0,0,0,0,32,0,0,8,0,0,0,0,0,0,0,0,3,248,63,192,15,254,127,240,31,255,255,248,31,255,255,248,63,255,255,252,63,255,255,252,127,255,255,254,127,255,255,254,127,255,255,254,127,255,255,254,63,255,255,252,63,255,255,252,63,255,255,252,31,255,255,248,31,255,255,248,15,255,255,240,7,255,255,224,3,255,255,192,1,255,255,128,64,255,255,0,0,127,254,2,0,31,248,0,0,15,240,0,8,3,192,0,8,1,128,16,0,0,0,0,0,96,2,0},
  {0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,3,248,63,192,15,254,127,240,31,255,255,248,31,255,255,248,63,255,255,252,63,255,255,252,127,255,255,254,127,255,255,254,127,255,255,254,127,255,255,254,63,255,255,252,63,255,255,252,63,255,255,252,31,255,255,248,31,255,255,248,15,255,255,240,7,255,255,224,3,255,255,192,1,255,255,128,0,255,255,0,0,127,254,0,0,31,248,0,0,15,240,0,0,3,192,0,0,1,128,0,0,0,0,0,0,0,0,0},
  {0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,3,248,63,192,15,254,127,240,31,255,255,248,31,255,255,248,63,255,255,252,63,255,255,252,127,255,255,254,127,255,255,254,127,255,255,254,127,255,255,254,63,255,255,252,63,255,255,252,63,255,255,252,31,255,255,248,31,255,255,248,15,255,255,240,7,255,255,224,3,255,255,192,1,255,255,128,0,255,255,0,0,127,254,0,0,31,248,0,0,15,240,0,0,3,192,0,0,1,128,0,0,0,0,0,0,0,0,0},
  {0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,3,248,63,192,15,254,127,240,31,255,255,248,31,255,255,248,63,255,255,252,63,255,255,252,127,255,255,254,127,255,255,254,127,255,255,254,127,255,255,254,63,255,255,252,63,255,255,252,63,255,255,252,31,255,255,248,31,255,255,248,15,255,255,240,7,255,255,224,3,255,255,192,1,255,255,128,0,255,255,0,0,127,254,0,0,31,248,0,0,15,240,0,0,3,192,0,0,1,128,0,0,0,0,0,0,0,0,0},
  {0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,3,248,63,192,15,254,127,240,31,255,255,248,31,255,255,248,63,255,255,252,63,255,255,252,127,255,255,254,127,255,255,254,127,255,255,254,127,255,255,254,63,255,255,252,63,255,255,252,63,255,255,252,31,255,255,248,31,255,255,248,15,255,255,240,7,255,255,224,3,255,255,192,1,255,255,128,0,255,255,0,0,127,254,0,0,31,248,0,0,15,240,0,0,3,192,0,0,1,128,0,0,0,0,0,0,0,0,0},
  {0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,3,248,63,192,15,254,127,240,31,255,255,248,31,255,255,248,63,255,255,252,63,255,255,252,127,255,255,254,127,255,255,254,127,255,255,254,127,255,255,254,63,255,255,252,63,255,255,252,63,255,255,252,31,255,255,248,31,255,255,248,15,255,255,240,7,255,255,224,3,255,255,192,1,255,255,128,0,255,255,0,0,127,254,0,0,31,248,0,0,15,240,0,0,3,192,0,0,1,128,0,0,0,0,0,0,0,0,0},
  {0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,3,248,63,192,15,254,127,240,31,255,255,248,31,255,255,248,63,255,255,252,63,255,255,252,127,255,255,254,127,255,255,254,127,255,255,254,127,255,255,254,63,255,255,252,63,255,255,252,63,255,255,252,31,255,255,248,31,255,255,248,15,255,255,240,7,255,255,224,3,255,255,192,1,255,255,128,0,255,255,0,0,127,254,0,0,31,248,0,0,15,240,0,0,3,192,0,0,1,128,0,0,0,0,0,0,0,0,0},
  {0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,3,248,63,192,15,254,127,240,31,255,255,248,31,255,255,248,63,255,255,252,63,255,255,252,127,255,255,254,127,255,255,254,127,255,255,254,127,255,255,254,63,255,255,252,63,255,255,252,63,255,255,252,31,255,255,248,31,255,255,248,15,255,255,240,7,255,255,224,3,255,255,192,1,255,255,128,0,255,255,0,0,127,254,0,0,31,248,0,0,15,240,0,0,3,192,0,0,1,128,0,0,0,0,0,0,0,0,0},
  {0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,3,248,31,192,15,252,63,240,31,255,255,248,63,255,255,252,63,255,255,252,127,255,255,254,127,255,255,254,127,255,255,254,255,255,255,255,255,255,255,255,127,255,255,254,127,255,255,254,127,255,255,254,127,255,255,254,63,255,255,252,63,255,255,252,31,255,255,248,15,255,255,240,7,255,255,224,3,255,255,192,1,255,255,128,0,255,255,0,0,127,254,0,0,31,248,0,0,15,240,0,0,3,192,0,0,1,128,0,0,0,0,0},
  {0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,7,248,31,224,31,254,127,248,63,255,255,252,127,255,255,254,127,255,255,254,255,255,255,255,255,255,255,255,255,255,255,255,255,255,255,255,255,255,255,255,255,255,255,255,255,255,255,255,127,255,255,254,127,255,255,254,127,255,255,254,63,255,255,252,31,255,255,248,31,255,255,248,15,255,255,240,7,255,255,224,3,255,255,192,0,255,255,0,0,127,254,0,0,63,252,0,0,15,240,0,0,7,224,0,0,3,192,0,0,0,0,0},
  {0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,1,240,15,128,7,252,63,224,15,254,127,240,31,255,255,248,63,255,255,252,127,255,255,252,127,255,255,254,127,255,255,254,127,255,255,254,127,255,255,254,127,255,255,254,127,255,255,254,63,255,255,252,63,255,255,252,63,255,255,252,31,255,255,248,15,255,255,240,15,255,255,240,7,255,255,224,3,255,255,128,0,255,255,0,0,127,254,0,0,63,252,0,0,15,240,0,0,7,224,0,0,1,128,0,0,0,0,0,0,0,0,0},
  {0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,3,248,31,192,7,254,127,224,15,255,255,240,31,255,255,248,63,255,255,248,63,255,255,252,63,255,255,252,63,255,255,252,63,255,255,252,63,255,255,252,63,255,255,252,63,255,255,252,31,255,255,248,31,255,255,248,15,255,255,240,7,255,255,224,7,255,255,224,3,255,255,192,0,255,255,0,0,127,254,0,0,63,252,0,0,31,240,0,0,7,224,0,0,3,192,0,0,0,0,0,0,0,0,0,0,0,0,0},
  {0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,3,248,31,192,6,14,112,96,12,3,192,48,24,1,128,24,48,24,24,12,32,126,126,4,32,255,255,4,33,255,255,4,33,255,255,132,33,255,255,132,33,255,255,132,48,255,255,12,16,255,255,8,24,127,254,24,8,63,252,16,12,31,248,48,6,15,240,96,3,7,224,192,1,129,129,128,0,96,6,0,0,48,12,0,0,24,24,0,0,6,96,0,0,3,192,0,0,1,0,0,0,0,0,0,0,0,0,0},
  {0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,3,248,63,192,14,6,96,112,24,3,192,24,16,1,128,8,32,0,0,4,32,0,0,4,96,0,0,6,96,0,0,6,96,6,96,6,96,15,240,6,32,15,240,4,32,15,240,4,48,7,224,12,16,3,192,8,24,0,0,24,12,0,0,48,6,0,0,96,3,0,0,192,1,128,1,128,0,192,3,0,0,112,14,0,0,24,24,0,0,12,48,0,0,3,192,0,0,1,128,0,0,0,0,0,0,0,0,0},
  {0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,3,248,63,192,14,6,96,112,24,3,192,24,16,1,128,8,32,0,0,4,32,0,0,4,96,0,0,6,96,0,0,6,96,0,0,6,96,0,0,6,32,1,128,4,32,1,128,4,48,0,0,12,16,0,0,8,24,0,0,24,12,0,0,48,6,0,0,96,3,0,0,192,1,128,1,128,0,192,3,0,0,112,14,0,0,24,24,0,0,12,48,0,0,3,192,0,0,1,128,0,0,0,0,0,0,0,0,0},
  {0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,3,248,63,192,14,6,96,112,24,3,192,24,16,1,128,8,32,0,0,4,32,0,0,4,96,0,0,6,96,0,0,6,96,0,0,6,96,0,0,6,32,0,0,4,32,0,0,4,48,0,0,12,16,0,0,8,24,0,0,24,12,0,0,48,6,0,0,96,3,0,0,192,1,128,1,128,0,192,3,0,0,112,14,0,0,24,24,0,0,12,48,0,0,3,192,0,0,1,128,0,0,0,0,0,0,0,0,0},
  {0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,3,248,63,192,14,6,96,112,24,3,192,24,16,1,128,8,32,0,0,4,32,0,0,4,96,0,0,6,96,0,0,6,96,0,0,6,96,0,0,6,32,0,0,4,32,0,0,4,48,0,0,12,16,0,0,8,24,0,0,24,12,0,0,48,6,0,0,96,3,0,0,192,1,128,1,128,0,192,3,0,0,112,14,0,0,24,24,0,0,12,48,0,0,3,192,0,0,1,128,0,0,0,0,0,0,0,0,0},
  {0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,3,248,63,192,14,6,96,112,24,3,192,24,16,1,128,8,32,0,0,4,32,0,0,4,96,0,0,6,96,0,0,6,96,0,0,6,96,0,0,6,32,0,0,4,32,0,0,4,48,0,0,12,16,0,0,8,24,0,0,24,12,0,0,48,6,0,0,96,3,0,0,192,1,128,1,128,0,192,3,0,0,112,14,0,0,24,24,0,0,12,48,0,0,3,192,0,0,1,128,0,0,0,0,0,0,0,0,0}
};
#define encoderPinA  2                   // Rotary encoder gpio pin
#define encoderPinB  4                   // Rotary encoder gpio pin
#define encoderPress 3 
#define SCREEN_WIDTH 128 // OLED display width,  in pixels
#define SCREEN_HEIGHT 64 // OLED display height, in pixels
struct DateTime {
  int year;
  int month;
  int day;
  int hour;
  int minute;
  int second;
};
#define EEPROM_ADDRESS_FIRST_DATE 0 // Starting address in EEPROM for the first date
#define EEPROM_ADDRESS_SECOND_DATE (EEPROM_ADDRESS_FIRST_DATE + sizeof(DateTime)) // Starting address in EEPROM for the second date
#define EEPROM_SIZE sizeof(DateTime)
DateTime startTime = {2024, 1, 1, 0, 0, 0}; // Example start time
DateTime eventTime = {2024, 1, 1, 0, 0, 0}; // Example end time
DateTime difference;
// Define constants for screen states
//const int SCREEN_OPTION_1 = 1;
//const int SCREEN_OPTION_2 = 2;
//const int SCREEN_OPTION_3 = 3;
//const int SCREEN_OPTION_4 = 4;
volatile int encoderValue = 0;
unsigned long previousMillis = 0;
const unsigned long debounceDelay = 200; // Adjust as needed
unsigned long lastDebounceTime = 0;
//volatile int aState, bState,aLastState;
//int buttonState = 1;
volatile int option=0;
int screen2=0,screen2option=0;
static int lastValue=0;
const unsigned long IDLE_TIMEOUT =  18000;
const long interval = 1000;
int mode=0;
int rtmode=0;
unsigned long lastUserInputMillis = 0;
int eventmode=0;
unsigned long currentMillis;
DateTime eventDateTime;
int selectedYear = 2024;
int selectedMonth = 1;
int selectedDay = 1;
int selectedHour = 0;
int selectedMinute = 0;
int selectedSecond = 0;
int rselectedYear = 2024;
int rselectedMonth = 1;
int rselectedDay = 1;
int rselectedHour = 0;
int rselectedMinute = 0;
int rselectedSecond = 0;
enum DateTimeComponent {
  YEAR,
  MONTH,
  DAY,
  HOUR,
  MINUTE,
  SECOND,
  EXIT
};
DateTimeComponent currentComponent = HOUR;//SECOND;//YEAR;
int isBefore(DateTime endTime, DateTime startTime) {
  if (endTime.year < startTime.year ||
      (endTime.year == startTime.year && endTime.month < startTime.month) ||
      (endTime.year == startTime.year && endTime.month == startTime.month && endTime.day < startTime.day) ||
      (endTime.year == startTime.year && endTime.month == startTime.month && endTime.day == startTime.day && endTime.hour < startTime.hour) ||
      (endTime.year == startTime.year && endTime.month == startTime.month && endTime.day == startTime.day && endTime.hour == startTime.hour && endTime.minute < startTime.minute) ||
      (endTime.year == startTime.year && endTime.month == startTime.month && endTime.day == startTime.day && endTime.hour == startTime.hour && endTime.minute == startTime.minute && endTime.second < startTime.second)) {
    return 1; // End time is before start time
  } else {
    return 0; // End time is not before start time
  }
}
void serializeDateTime( DateTime &dateTime, int address) {
  byte buffer[sizeof(DateTime)];
  memcpy(buffer, &dateTime, sizeof(DateTime));
  for (int i = 0; i < sizeof(DateTime); i++) {
    EEPROM.update(address + i, buffer[i]);
  }
}

void deserializeDateTime(DateTime &dateTime, int address) {
  byte buffer[sizeof(DateTime)];
  for (int i = 0; i < sizeof(DateTime); i++) {
    buffer[i] = EEPROM.read(address + i);
  }
  memcpy(&dateTime, buffer, sizeof(DateTime));
}

void handle(){
  if(screen2==0)
  mode=1;
  lastUserInputMillis = millis();
  if(eventmode==1){
    switch (currentComponent) {
      case YEAR:
        currentComponent = EXIT;
        break;
      case MONTH:
        currentComponent = DAY;
        break;
      case DAY:
        currentComponent = YEAR;
        break;
      case HOUR:
        currentComponent = MINUTE;
        break;
      case MINUTE:
        currentComponent = SECOND;
        break;
      case SECOND:
        currentComponent = MONTH;
        break;
      case EXIT:
        eventmode=0;
        mode=0;
        currentComponent = HOUR;
        break;  
    }
  }
}

Adafruit_SSD1306 oled(SCREEN_WIDTH, SCREEN_HEIGHT, &Wire, -1);

void drawAnimation() {
  oled.clearDisplay();
  oled.drawBitmap(48, 16, frames[frame], FRAME_WIDTH, FRAME_HEIGHT, 1);
  oled.display();
  frame = (frame + 1) % FRAME_COUNT;
  delay(FRAME_DELAY);
  }

bool setEventMode = false;
void showrealtime()
{
  unsigned long starTime = millis();
  while (millis() - starTime < 4000){
    oled.clearDisplay();
    oled.setFont(&FreeSerifBoldItalic12pt7b);
    oled.setTextSize(1);
    oled.setTextColor(WHITE);
    oled.setCursor(0, 15);
    oled.print("Real Time :");
    oled.setFont(&FreeSerifBoldItalic9pt7b);
    oled.setTextSize(1);
    oled.setTextColor(WHITE);
    oled.setCursor(0, 40);
    oled.print(startTime.hour);
    oled.print(" : ");
     oled.print(startTime.minute);
    oled.print(" : ");
     oled.print(startTime.second);
    
    oled.setCursor(0, 60);
    oled.print(startTime.month);
    oled.print(" / ");
    oled.print(startTime.day);
    oled.print(" / ");
    oled.println(startTime.year);
    oled.display();
    if(mode==1){
      delay(300);
      if(digitalRead(encoderPress)==HIGH){
        mode=0;
      }
      else{
        mode=0;
        eventmode=1;
        rtmode=1;
        setevent();
      }
    }
  }
}

void setevent() {
  while (eventmode == 1) {
    updateSelectedDateTime();

    oled.clearDisplay();
    oled.setFont();
    oled.setTextSize(1);
    oled.setTextColor(SSD1306_WHITE);
    oled.setCursor(0, 0);

    if (rtmode == 1) {
      oled.print("Set Real Time:");
      oled.setFont();
      oled.setTextSize(2);
      oled.setCursor(0, 15);
      
      if (currentComponent == HOUR) {
        oled.setTextColor(SSD1306_BLACK, SSD1306_WHITE);
      } else {
        oled.setTextColor(SSD1306_WHITE);
      }
      oled.print(rselectedHour);
      oled.print(':');
      
      if (currentComponent == MINUTE) {
        oled.setTextColor(SSD1306_BLACK, SSD1306_WHITE);
      } else {
        oled.setTextColor(SSD1306_WHITE);
      }
      oled.print(rselectedMinute);
      oled.print(':');
      
      if (currentComponent == SECOND) {
        oled.setTextColor(SSD1306_BLACK, SSD1306_WHITE);
      } else {
        oled.setTextColor(SSD1306_WHITE);
      }
      oled.print(rselectedSecond);
      oled.print(':');
      
      oled.setCursor(0, 35);
      
      if (currentComponent == MONTH) {
        oled.setTextColor(SSD1306_BLACK, SSD1306_WHITE);
      } else {
        oled.setTextColor(SSD1306_WHITE);
      }
      oled.print(rselectedMonth);
      oled.print('/');
      
      if (currentComponent == DAY) {
        oled.setTextColor(SSD1306_BLACK, SSD1306_WHITE);
      } else {
        oled.setTextColor(SSD1306_WHITE);
      }
      oled.print(rselectedDay);
      oled.print('/');
      
      if (currentComponent == YEAR) {
        oled.setTextColor(SSD1306_BLACK, SSD1306_WHITE);
      } else {
        oled.setTextColor(SSD1306_WHITE);
      }
      oled.print(rselectedYear);
      
      oled.setTextSize(1);
      oled.setCursor(0, 55);
      
      if (currentComponent == EXIT) {
        oled.setTextColor(SSD1306_BLACK, SSD1306_WHITE);
      } else {
        oled.setTextColor(SSD1306_WHITE);
      }
      oled.println("EXIT");
      oled.display();
      
      while (millis() - lastUserInputMillis > IDLE_TIMEOUT) {
        oled.clearDisplay();
        drawAnimation();
        delay(500);
      }
    } else {
      oled.println("Set Event Date/Time:");
      oled.setTextSize(2);
      oled.setCursor(0, 15);
      oled.setTextColor(SSD1306_WHITE, SSD1306_BLACK);
      
      if (currentComponent == HOUR) {
        oled.setTextColor(SSD1306_BLACK, SSD1306_WHITE);
      } else {
        oled.setTextColor(SSD1306_WHITE);
      }
      oled.print(selectedHour);
      oled.print(':');
      
      if (currentComponent == MINUTE) {
        oled.setTextColor(SSD1306_BLACK, SSD1306_WHITE);
      } else {
        oled.setTextColor(SSD1306_WHITE);
      }
      oled.print(selectedMinute);
      oled.print(':');
      
      if (currentComponent == SECOND) {
        oled.setTextColor(SSD1306_BLACK, SSD1306_WHITE);
      } else {
        oled.setTextColor(SSD1306_WHITE);
      }
      oled.print(selectedSecond);
      
      oled.setCursor(0, 35);
      
      if (currentComponent == MONTH) {
        oled.setTextColor(SSD1306_BLACK, SSD1306_WHITE);
      } else {
        oled.setTextColor(SSD1306_WHITE);
      }
      oled.print(selectedMonth);
      oled.print('/');
      
      if (currentComponent == DAY) {
        oled.setTextColor(SSD1306_BLACK, SSD1306_WHITE);
      } else {
        oled.setTextColor(SSD1306_WHITE);
      }
      oled.print(selectedDay);
      oled.print('/');
      
      if (currentComponent == YEAR) {
        oled.setTextColor(SSD1306_BLACK, SSD1306_WHITE);
      } else {
        oled.setTextColor(SSD1306_WHITE);
      }
      oled.print(selectedYear);
      
      oled.setTextSize(1);
      oled.setCursor(0, 55);
      
      if (currentComponent == EXIT) {
        oled.setTextColor(SSD1306_BLACK, SSD1306_WHITE);
      } else {
        oled.setTextColor(SSD1306_WHITE);
      }
      oled.println("EXIT");
      oled.display();
      
      while (millis() - lastUserInputMillis > IDLE_TIMEOUT) {
        oled.clearDisplay();
        drawAnimation();
        delay(500);
      }
    }
  }

  eventDateTime.year = selectedYear;
  eventDateTime.month = selectedMonth;
  eventDateTime.day = selectedDay;
  eventDateTime.hour = selectedHour;
  eventDateTime.minute = selectedMinute;
  eventDateTime.second = selectedSecond;
  
  if (rtmode == 1) {
    startTime.year = rselectedYear;
    startTime.month = rselectedMonth;
    startTime.day = rselectedDay;
    startTime.hour = rselectedHour;
    startTime.minute = rselectedMinute;
    startTime.second = rselectedSecond;
    EEPROM.write(10, 0);
    rtmode = 0;
  } else {
    eventTime.year = eventDateTime.year;
    eventTime.month = eventDateTime.month;
    eventTime.day = eventDateTime.day;
    eventTime.hour = eventDateTime.hour;
    eventTime.minute = eventDateTime.minute;
    eventTime.second = eventDateTime.second;
    serializeDateTime(startTime, EEPROM_ADDRESS_SECOND_DATE);
  }
  
  if (isBefore(startTime, eventTime)) {
    oled.clearDisplay();
    oled.setFont(&FreeSerifBoldItalic12pt7b);
    oled.setTextSize(2);
    oled.setTextColor(SSD1306_WHITE);
    oled.setCursor(0, 40);
    oled.print("Error");
    oled.display();
    delay(1000);
    eventmode = 1;
    currentComponent = YEAR;
    setevent();
  }
}

void updateSelectedDateTime() {
  //buttonState = digitalRead(encoderPress);
  int newValue = encoderValue;

  if ((millis() - lastDebounceTime) > debounceDelay) {
    if (newValue != lastValue) {
      lastDebounceTime = millis();

      switch (currentComponent) {
        case SECOND:
          if (rtmode == 1) {
            if (newValue > lastValue) {
              rselectedSecond++;
            } else {
              rselectedSecond--;
            }
          } else {
            if (newValue > lastValue) {
              selectedSecond++;
            } else {
              selectedSecond--;
            }
          }
          break;
        case MINUTE:
          if (rtmode == 1) {
            if (newValue > lastValue) {
              rselectedMinute++;
            } else {
              rselectedMinute--;
            }
          } else {
            if (newValue > lastValue) {
              selectedMinute++;
            } else {
              selectedMinute--;
            }
          }
          break;
        case HOUR:
          if (rtmode == 1) {
            if (newValue > lastValue) {
              rselectedHour++;
            } else {
              rselectedHour--;
            }
          } else {
            if (newValue > lastValue) {
              selectedHour++;
            } else {
              selectedHour--;
            }
          }
          break;
        case DAY:
          if (rtmode == 1) {
            if (newValue > lastValue) {
              rselectedDay++;
            } else {
              rselectedDay--;
            }
          } else {
            if (newValue > lastValue) {
              selectedDay++;
            } else {
              selectedDay--;
            }
          }
          break;
        case MONTH:
          if (rtmode == 1) {
            if (newValue > lastValue) {
              rselectedMonth++;
            } else {
              rselectedMonth--;
            }
          } else {
            if (newValue > lastValue) {
              selectedMonth++;
            } else {
              selectedMonth--;
            }
          }
          break;
        case YEAR:
          if (rtmode == 1) {
            if (newValue > lastValue) {
              rselectedYear++;
            } else {
              rselectedYear--;
            }
          } else {
            if (newValue > lastValue) {
              selectedYear++;
            } else {
              selectedYear--;
            }
          }
          break;
        case EXIT:
          currentComponent = HOUR; // Change to the first component after exiting
          break;
      }
//Serial.println(newValue);
//Serial.println(selectedHour);
      // Constrain the values to their valid ranges
      selectedYear = constrain(selectedYear, 0, 9999);
      selectedMonth = constrain(selectedMonth, 1, 12);
      selectedDay = constrain(selectedDay, 1, dayInMonth(selectedYear, selectedMonth));
      selectedHour = constrain(selectedHour, 0, 23);
      selectedMinute = constrain(selectedMinute, 0, 59);
      selectedSecond = constrain(selectedSecond, 0, 59);
      
      // Real time mode variables constraints
      rselectedYear = constrain(rselectedYear, 0, 9999);
      rselectedMonth = constrain(rselectedMonth, 1, 12);
      rselectedDay = constrain(rselectedDay, 1, dayInMonth(rselectedYear, rselectedMonth));
      rselectedHour = constrain(rselectedHour, 0, 23);
      rselectedMinute = constrain(rselectedMinute, 0, 59);
      rselectedSecond = constrain(rselectedSecond, 0, 59);
    }
  }
  lastValue = newValue;
}

int dayInMonth(int year, int month) {
  if (month == 2) {
    if ((year % 4 == 0 && year % 100 != 0) || (year % 400 == 0)) {
      return 29;
    } else {
      return 28;
    }
  } else if (month == 4 || month == 6 || month == 9 || month == 11) {
    return 30;
  } else {
    return 31;
  }
}
void incrementSecond(DateTime &dt) {
  dt.second++;
  if (dt.second >= 60) {
    dt.second = 0;
    dt.minute++;
    if (dt.minute >= 60) {
      dt.minute = 0;
      dt.hour++;
      if (dt.hour >= 24) {
        dt.hour = 0;
        dt.day++;
        int daysInMonth = dayInMonth(dt.year, dt.month);
        if (dt.day > daysInMonth) {
          dt.day = 1;
          dt.month++;
          if (dt.month > 12) {
            dt.month = 1;
            dt.year++;
          }
        }
      }
    }
  }
}
DateTime subtractDateTime(DateTime dt1, DateTime dt2) {
  DateTime result;

  if (dt1.second < dt2.second) {
    dt1.second += 60;
    dt1.minute--;
  }
  result.second = dt1.second - dt2.second;

  if (dt1.minute < dt2.minute) {
    dt1.minute += 60;
    dt1.hour--;
  }
  result.minute = dt1.minute - dt2.minute;

  if (dt1.hour < dt2.hour) {
    dt1.hour += 24;
    dt1.day--;
  }
  result.hour = dt1.hour - dt2.hour;

  if (dt1.day < dt2.day) {
    int daysInMonth = dayInMonth(dt1.year, dt1.month);
    dt1.day += daysInMonth;
    dt1.month--;
  }
  result.day = dt1.day - dt2.day;

  if (dt1.month < dt2.month) {
    dt1.month += 12;
    dt1.year--;
  }
  result.month = dt1.month - dt2.month;

  result.year = dt1.year - dt2.year;

  return result;
}
bool isLeapYear(int year) {
  return (year % 4 == 0 && year % 100 != 0) || (year % 400 == 0);
}
int daysInYear(int year) {
  return isLeapYear(year) ? 366 : 365;
}

int dayOfYear(DateTime date) {
  int days = 0;
  for (int month = 1; month < date.month; month++) {
    days += dayInMonth(date.year, month);
  }
  days += date.day;
  return days;
}
unsigned long int calculateTotalDays(DateTime start, DateTime end) {
  unsigned long int totalDays = 0;

  // Calculate the total number of days for each year between start and end
  for (int year = start.year; year < end.year; year++) {
    totalDays += daysInYear(year);
  }

  // Calculate the remaining days in the start year
  totalDays += dayOfYear(end) - dayOfYear(start);

  return totalDays;
}
void displayElapsedTimeOption1() {
  DateTime difference = subtractDateTime(startTime,eventTime);
  int years = difference.year;
  int months = difference.month;
  int days = difference.day;
  int hours = difference.hour;
  int minutes = difference.minute;
  int seconds = difference.second;
  if (seconds < 0) {
    seconds += 60;
    minutes--;
  }
  if (minutes < 0) {
    minutes += 60;
    hours--;
  }
  if (hours < 0) {
    hours += 24;
    days--;
  }
  int daysInMonth = dayInMonth(eventTime.year, eventTime.month);
  if (days < 0) {
    days += daysInMonth;
    months--;
  }
  if(months < 0) {
    months += 12;
    years--;
  } 
  oled.setFont(&FreeSerifBoldItalic12pt7b);
  oled.clearDisplay();
  oled.setTextSize(1);
  oled.setTextColor(WHITE);
  oled.setCursor(0, 15);
  oled.print("Together for");
  oled.setFont(&FreeSerifBoldItalic9pt7b);
  oled.setTextSize(1);
  oled.setTextColor(WHITE,SSD1306_BLACK); 
  
 oled.setCursor(0, 40);
  
  
 // oled.setCursor(0, 60);
    oled.print(years);
  oled.print("Y ");
   oled.print(" / ");
  oled.print(months);
  oled.print("M ");
   oled.print(" / ");
  oled.print(days);
  oled.print("D");
 oled.print("  ");
  oled.print(hours);
  oled.print("h ");
   oled.print(" : ");
  oled.print(minutes);
  oled.print(" m ");
   oled.print(" : ");
  oled.print(seconds);
  oled.print("s");
 
  oled.display();
 screen2=0;
}

void displayElapsedTimeOption2() {
    //static int screen2option = 0;
    static unsigned long lastDebounceTime = 0;

    unsigned long currentMillis = millis();
    if (currentMillis - lastButtonPress >= debounceDelay) {
        lastButtonPress = currentMillis;

        unsigned long int totalDays = calculateTotalDays(eventTime, startTime);
        oled.setFont(&FreeSerifBoldItalic12pt7b);
        oled.clearDisplay();
        oled.setTextSize(1);
        oled.setTextColor(WHITE);
        oled.setCursor(0, 15);
        oled.print("Together for");

        if (digitalRead(encoderPress) == LOW) {
            screen2option++;
            if (screen2option > 1) {
                screen2option = 0;
            }
            lastScreenChangeTime = currentMillis; // Record the time of screen change
        }

        switch (screen2option) {
            case 0:
                if (totalDays >= 1000000) {
                    oled.setTextColor(WHITE);
                    oled.setCursor(0, 45);
                    oled.println("Million days");
                } else {
                    oled.setCursor(0, 45);
                    oled.print(totalDays);
                    oled.println(" Days");
                }
                break;

            case 1:       
                if (currentMillis - lastScreenChangeTime >= delayBetweenScreens) {
                  toggle2++;// screen2option = 0; // Switch back to case 0 after delayBetweenScreens
                 lastScreenChangeTime = currentMillis; // Record the time of screen change
                }
               if(toggle2==0)
                  {
                oled.setCursor(0, 40);
                oled.print(totalDays / 7);
                oled.print(" Weeks ");
                //oled.print(totalDays % 7);
                //oled.println(" Days");
            }
            else if(toggle2==1)
            {
              oled.setCursor(0, 40);
                //oled.print(totalDays / 365);
                //oled.print(" Y ");
                oled.print(totalDays / 30);
                oled.println(" Months ");

            }
            else
            {
              toggle2=0;
              screen2option=0;
            }
                break;
        }
        oled.display();
        
    }
    screen2 = 1;
}

///////////////////
void displayElapsedTimeOption3() {
  oled.clearDisplay();
  oled.setFont(&FreeSerifBoldItalic9pt7b);
  oled.setTextSize(1);
  oled.setTextColor(WHITE);
  oled.setCursor(0, 30);
  oled.println("Andre & Wendy");
  oled.display();
  screen2=0;
  }
//////////////////
//////////////////////
void displayElapsedTimeOption4() {
  oled.clearDisplay();
  oled.setFont(&FreeSerifBoldItalic9pt7b);
  oled.setTextSize(1);
  oled.setTextColor(WHITE);
  oled.setCursor(0, 15);
  oled.println("Today, I choose");
  oled.setCursor(0, 35);
  oled.println("to love you with");
  oled.setCursor(0, 55);
  oled.println("my very best self");
  oled.display();
  screen2=0;
  }
void handleEncoder()

{
   int newClk = digitalRead(encoderPinA);
  if (newClk != lastClk) {
    // There was a change on the CLK pin
    lastClk = newClk;
    int dtValue = digitalRead(encoderPinB);
    if (newClk == LOW && dtValue == HIGH) {
      //Serial.println("Rotated clockwise");
      option++;
      encoderValue++;
      if(option>3)
      option=0;
       //Serial.print("Option=");
     // Serial.println(option);
    }
    if (newClk == LOW && dtValue == LOW) {
      //Serial.println("Rotated counterclockwise ");
       option--;
       encoderValue--;
      if(option<0)
      option=3;
      //Serial.print("Option=");
     // Serial.println(option);
    }
  }
 lastUserInputMillis = millis();
 
}


unsigned long int m=0;
ISR(TIMER1_COMPA_vect) {
  incrementSecond(startTime);
}
void setup() {
  pinMode(encoderPinA, INPUT_PULLUP);
  pinMode(encoderPinB, INPUT_PULLUP);
  pinMode(encoderPress, INPUT_PULLUP);
  Serial.begin(9600);

  attachInterrupt(digitalPinToInterrupt(encoderPinA), handleEncoder, CHANGE);
  attachInterrupt(digitalPinToInterrupt(encoderPinB), handleEncoder, CHANGE);
  attachInterrupt(digitalPinToInterrupt(encoderPress), handle, FALLING);

  m=EEPROM.read(10);
  if(m==255) {
    DateTime startTime = {2024, 2, 8, 0, 0, 0}; // Example start time
    DateTime eventTime = {2024, 2, 8, 0, 0, 0}; // Example end time
  } else {
    deserializeDateTime(startTime, EEPROM_ADDRESS_FIRST_DATE);
    deserializeDateTime(eventTime, EEPROM_ADDRESS_SECOND_DATE);
  }

  if (!oled.begin(SSD1306_SWITCHCAPVCC, 0x3C)) {
    Serial.println(F("SSD1306 allocation failed"));
    while (true);
  }
  cli(); // Disable interrupts
  TCCR1A = 0;
  TCCR1B = 0;
  TCNT1 = 0;
  OCR1A = 15624; // 1 Hz (16000000/1024)
  TCCR1B |= (1 << WGM12); // CTC mode
  TCCR1B |= (1 << CS12) | (1 << CS10); // 1024 prescaler
  TIMSK1 |= (1 << OCIE1A); // Enable Timer1 compare interrupt
  sei(); // Enable interrupts
}

void loop() {
  if(option==0){
    displayElapsedTimeOption3(); 
  } else if (option==1) {
    displayElapsedTimeOption1();
  }
  else if (option==2) {
    displayElapsedTimeOption2();
  }
  else if (option==3) {
    displayElapsedTimeOption4();
  }

  if(mode==1 && screen2==0)
  {
     delay(500);
    if(digitalRead(encoderPress)==HIGH)
    {
      mode=0;
      showrealtime();
    }
    else
    {
      mode=0;
      eventmode=1;
      setevent();
    }
  }
  
  currentMillis=millis();
  if (currentMillis - previousMillis >= 1800000) {
    DateTime currentTime = startTime;
    serializeDateTime(currentTime, EEPROM_ADDRESS_FIRST_DATE);
    previousMillis = currentMillis;
  }
  while (millis() - lastUserInputMillis > IDLE_TIMEOUT) {
      oled.clearDisplay();
      drawAnimation();
      delay(500);
    }
}