#include <WiFi.h>
#include <Wire.h>
#include <LiquidCrystal_I2C.h>

LiquidCrystal_I2C lcd = LiquidCrystal_I2C(0x27, 16, 2);

const char* ssid = "Wokwi-GUEST";
const char* password = "";

int currButton = LOW;
int lastButton = LOW;

byte count = 0;

void setup() {
  Serial.begin(115200);

  lcd.init();
  lcd.backlight();

  WiFi.begin(ssid, password);
  while (WiFi.status() != WL_CONNECTED)
  {
    delay(1000);
    lcd.clear();
    lcd.setCursor(0, 0);
    lcd.print("Connecting...");
  }
  lcd.clear();
  lcd.setCursor(0, 0);
  lcd.print("Connected!!!");

  pinMode(2, INPUT);
  digitalWrite(2, HIGH);
}

int Debounce(int last){
  int current = digitalRead(2);
  if(last != current){
    delay(5);
    current = digitalRead(2);
  }
  return current;
}

void Print(){
  lcd.clear();
  switch (count){
    case 0:
      lcd.setCursor(0, 0); lcd.print("IP address: ");
      lcd.setCursor(0, 1); lcd.print(WiFi.localIP());

      Serial.print("IP address: "); Serial.println(WiFi.localIP());
      break;

    case 1:
      lcd.setCursor(0, 0); lcd.print("Hostname: ");
      lcd.setCursor(0, 1); lcd.print(WiFi.getHostname());

      Serial.print("Hostname: "); Serial.println(WiFi.getHostname());
      break;

    case 2:
      lcd.setCursor(0, 0); lcd.print("ESP Mac Address: ");
      lcd.setCursor(0, 1); lcd.print(WiFi.macAddress());

      Serial.print("ESP Mac Address: "); Serial.println(WiFi.macAddress());
      break;

    case 3:
      lcd.setCursor(0, 0); lcd.print("Gateway IP: ");
      lcd.setCursor(0, 1); lcd.print(WiFi.gatewayIP());

      Serial.print("Gateway IP: "); Serial.println(WiFi.gatewayIP());
      break;

    case 4:
      lcd.setCursor(0, 0); lcd.print("DNS: ");
      lcd.setCursor(0, 1); lcd.print(WiFi.dnsIP());

      Serial.print("DNS: "); Serial.println(WiFi.dnsIP());
      count = -1;
      break;

    default:
      break;
  }
  count++;
}

void Exec(){
  currButton = Debounce(lastButton);

  if(lastButton == HIGH && currButton == LOW){
    Print();
  }

  lastButton = currButton;
}

void loop() {
  Exec();
}