#include <LiquidCrystal_I2C.h>
#include <EEPROM.h>

LiquidCrystal_I2C lcd(0x27,16,2);

#define ENCODER_CLK 2
#define ENCODER_DT  3
#define ENCODER_SW  4

int menu = 0;

void setup() {
  // put your setup code here, to run once:
  lcd.init();
  lcd.clear();         
  lcd.backlight();
  
int dtValue = digitalRead(ENCODER_DT);
  // Initialize encoder pins
  pinMode(ENCODER_CLK, INPUT);
  pinMode(ENCODER_DT, INPUT);
  pinMode(ENCODER_SW, INPUT_PULLUP);
  attachInterrupt(digitalPinToInterrupt(ENCODER_CLK), readEncoder, FALLING);

}

void updateMenu() {

  switch (menu) {
    case 0:
      menu = 1;
      break;
    case 1:
      lcd.clear();
      lcd.print(">LED1");
      lcd.setCursor(0, 1);
      lcd.print(" LED2");
      break;
    case 2:
      lcd.clear();
      lcd.print(" LED1");
      lcd.setCursor(0, 1);
      lcd.print(">LED2");
      break;
    case 3:
      lcd.clear();
      lcd.print(">LED3");
      lcd.setCursor(0, 1);
      lcd.print(" LED4");
      break;
    case 4:
      lcd.clear();
      lcd.print(" LED3");
      lcd.setCursor(0, 1);
      lcd.print(">LED4");
      break;
    case 5:
      menu = 4;
      break;
  }
}

void readEncoder() {

  if (digitalRead(ENCODER_DT) == HIGH) {menu++; // Clockwise
    //updateMenu();
  }
  if (digitalRead(ENCODER_DT) == LOW) {menu--; // Counterclockwise
    //updateMenu();
  }

}

void loop() {
  // put your main code here, to run repeatedly:

  lcd.setCursor(2,0);
  lcd.print("Lepo menu");

  lcd.setCursor(5,1);
  lcd.print(menu);

    if (digitalRead(ENCODER_SW) == LOW) {
    lcd.clear();
    menu=0;
  }

}