#include <LiquidCrystal_I2C.h>  // LiquidCrystal I2C - Version: 1.1.1
#include <Wire.h>
LiquidCrystal_I2C lcd(0x27, 20, 4);  // LCD HEX address 0x27

#define Menu_inc 5
#define Menu_dec 4
#define Menu 2

int Menu_Up = 0;
int Menu_Dn = 0;
int Menu_Sel = 0;

unsigned long a = 0;   //
unsigned long b = 250;  // time for long press on menu button


unsigned long Sec = 0;
unsigned long Mins = 0;
unsigned long Hours = 0;

int activetime = 0;
int starttime = 0;
int prevoustime = 0;
int c = 0;
int d = 0;
int e = 0;
int f = 0;
int g = 0;
int h = 0;

unsigned long startTime = 0;
unsigned long elapsedTime = 0;
boolean buttonState = LOW;
boolean lastButtonState = LOW;
boolean lastMenuState = LOW;
boolean MenuState = LOW;

void setup() {
  Serial.begin(9600);
  pinMode(Menu_inc, INPUT_PULLUP);
  pinMode(Menu_dec, INPUT_PULLUP);
  pinMode(Menu, INPUT_PULLUP);
  a = millis();

  lcd.init();                   // initialize the lcd
  lcd.backlight();              // turns on the backlight
  lcd.setCursor(0, 0);          // set cursor to first row
  lcd.print("Anne and Johns");  // print out to LCD
  lcd.setCursor(0, 1);          // set cursor to first row
  lcd.print("Heating ");        // print out to LCD
  delay(1000);
  lcd.clear();
}


  

void loop() {

  Menu_Up = digitalRead(Menu_inc);
  Menu_Dn = digitalRead(Menu_dec);
  Menu_Sel = digitalRead(Menu);
  buttonState = digitalRead(Menu);
  MenuState = digitalRead(Menu);

  //+++++++++++++++++++++Setting the timer for the menu++++++++++++++++++++++++++++++++++++++++++

  if (buttonState != lastButtonState and d == 0) {
    if (buttonState == LOW) startTime = millis();
  }
  if (buttonState == HIGH and d == 0) elapsedTime = 0;
  if (buttonState == LOW and d == 0) elapsedTime = millis() - startTime;
  lastButtonState = buttonState;

  //==============================================================================================

  if (elapsedTime > b and d == 0) d++, lcd.clear();

  if (d == 0) {
    activetime = (millis() / 1000) - starttime;
    if (prevoustime < activetime) Sec++, prevoustime = activetime;
    if (Sec > 59) Mins++, Sec = 0;
    if (Mins > 59) Hours++, Mins = 0;
    if (Hours > 23) Hours = 0;
    if (Hours < 10) lcd.setCursor(0, 0), lcd.print("0"), lcd.setCursor(1, 0);
    if (Hours >= 10) lcd.setCursor(0, 0);
    lcd.print(Hours);
    lcd.setCursor(2, 0);
    lcd.print(":");

    if (Mins < 10) lcd.setCursor(3, 0), lcd.print("0"), lcd.setCursor(4, 0), lcd.print(Mins);

    if (Mins >= 10) lcd.setCursor(3, 0), lcd.print(Mins);
    lcd.setCursor(5, 0);

    lcd.setCursor(8, 0);
    lcd.print("Heating:");

    //set the clock so that the time shifts to most relavent number leading zero (01) (10)
    //below 10


    Serial.print(d);
    Serial.print("  Elapsed Timer =");
    Serial.print(elapsedTime);
    Serial.print(" C =");
    Serial.println(c);
  }

while (d == 1){
  Menu_Sel = digitalRead(Menu);
  Menu_Up = digitalRead(Menu_inc);
  Menu_Dn = digitalRead(Menu_dec);
  MenuState = digitalRead(Menu);
  buttonState = digitalRead(Menu);

  if (e == 0) {
    lcd.clear(), lcd.setCursor(0, 0), lcd.print("Set Time"), e = 1;
  }

  
    if(Menu_Dn == LOW)  Hours++, delay(250);
    if (Hours > 23) Hours = 0;
    if (Hours < 10) lcd.setCursor(4, 2), lcd.print("0"), lcd.setCursor(5, 2), lcd.print(Hours);
    if (Hours >= 10) lcd.setCursor(4, 2), lcd.print(Hours);
    lcd.setCursor(6, 2), lcd.print(":");
    if (Mins < 10) lcd.setCursor(7, 2), lcd.print("0"), lcd.setCursor(8, 2), lcd.print(Mins);
    if (Mins >= 10) lcd.setCursor(7, 2), lcd.print(Mins);
  

  Serial.print(" d =");
  Serial.println(d);

  if (Menu_Up == LOW) lcd.clear(), d = 0, e = 0;

  break;
}

}