#define ENCODER_CLK 23
#define ENCODER_DT  22
#define BUTTON 4
#include <LiquidCrystal_I2C.h>
#include <Wire.h>

#define I2C_ADDR    0x27
#define LCD_COLUMNS 20
#define LCD_LINES   4

LiquidCrystal_I2C lcd(I2C_ADDR, LCD_COLUMNS, LCD_LINES);

#define SDA 13
#define SCL 12

#define NUM_MENU 2
#define NUM_VOCI 5
#define DIM_RIGA 16

char menu[NUM_MENU][NUM_VOCI][DIM_RIGA] {
  { "Imp. SSID","Imp. Password","Imp. Data","Imp. Ora","" },
  {  "SSID","Password","Data","Ora","Return"  }
};


int menu_level = 0;
int menu_index  = 0;

void printMenu(){
  lcd.clear();
  lcd.setCursor(0,0);
  lcd.print(menu[menu_level][menu_index]);
  lcd.setCursor(0,1);
  lcd.print(menu[menu_level][menu_index+1]);
  lcd.setCursor(15,0);
  lcd.cursor();
  lcd.blink_on();
}

void setup() {
  Wire.begin(SDA,SCL);
  Serial.begin(115200);
  pinMode(ENCODER_CLK, INPUT);
  pinMode(ENCODER_DT, INPUT);
  pinMode(BUTTON, INPUT_PULLUP);
  lcd.init();
  lcd.backlight();
  printMenu();
}

int lastClk = HIGH;



void loop() {

  static long lastMillis;
  int newClk = digitalRead(ENCODER_CLK);
  if (newClk != lastClk) {
    // There was a change on the CLK pin
    lastClk = newClk;
    int dtValue = digitalRead(ENCODER_DT);
    if (newClk == LOW && dtValue == HIGH) {
      Serial.println("Rotated clockwise ⏩");
       menu_index = menu_index +1;
      if(menu_index >= NUM_VOCI-2) menu_index = NUM_VOCI-2;
      Serial.println(menu_index);
      printMenu();
    }
    if (newClk == LOW && dtValue == LOW) {
      Serial.println("Rotated counterclockwise ⏪");
      menu_index = menu_index -1;
      if(menu_index <0 ) menu_index = 0;
      Serial.println(menu_index);
      printMenu();
    }
  }
  
  if(digitalRead(BUTTON) == LOW ){
    if(millis()- lastMillis >200){
      Serial.printf("Bottone Premuto con indice %d",menu_index);  
    }
    lastMillis = millis();
  }
 

  
  

}