#include <WiFi.h>
#include <NTPClient.h>
#include <WiFiUdp.h>
#include <Wire.h>
#include <LiquidCrystal_I2C.h>
#include <TimeLib.h>

const char* ssid = "Wokwi-GUEST";
const char* password = "";
const long utcOffsetInSeconds = 25200; // Waktu Indonesia Barat (WIB), UTC+7
WiFiUDP ntpUDP;
NTPClient timeClient(ntpUDP, "pool.ntp.org", utcOffsetInSeconds);
LiquidCrystal_I2C lcd(0x27, 20, 4); // Alamat I2C biasanya 0x27 atau 0x3F

void setup() {
  Serial.begin(9600);
  Serial.print("Connecting to WiFi");

  // Menghubungkan ke WiFi
  WiFi.begin(ssid, password);
  while (WiFi.status() != WL_CONNECTED) {
    delay(100);
    Serial.print(".");
  }
  Serial.println(" Connected!");

  // Memulai NTPClient
  timeClient.begin();

  // Inisialisasi LCD
  lcd.init();
  lcd.backlight();
  lcd.setCursor(0, 0);
  lcd.print("   ONLINE   ");
}

void loop() {
  // Memperbarui waktu
  timeClient.update();

  // Mendapatkan waktu sekarang
  unsigned long epochTime = timeClient.getEpochTime();
  setTime(epochTime);

  int currentYear = year();
  int currentMonth = month();
  int currentDay = day();
  int currentHour = hour();
  int currentMinute = minute();
  int currentSecond = second();

  // Menampilkan waktu sekarang ke Serial Monitor
  Serial.print("Current date and time: ");
  Serial.print(currentYear);
  Serial.print("-");
  if (currentMonth < 10) Serial.print("0");
  Serial.print(currentMonth);
  Serial.print("-");
  if (currentDay < 10) Serial.print("0");
  Serial.print(currentDay);
  Serial.print(" ");
  if (currentHour < 10) Serial.print("0");
  Serial.print(currentHour);
  Serial.print(":");
  if (currentMinute < 10) Serial.print("0");
  Serial.print(currentMinute);
  Serial.print(":");
  if (currentSecond < 10) Serial.print("0");
  Serial.println(currentSecond);

  // Menampilkan tanggal dan waktu sekarang ke LCD
  lcd.setCursor(0, 1);
  lcd.print("Date: ");
  lcd.print(currentDay);
  lcd.print("/");
  lcd.print(currentMonth);
  lcd.print("/");
  lcd.print(currentYear);

  lcd.setCursor(0, 2);
  lcd.print("Time: ");
  if (currentHour < 10) lcd.print("0");
  lcd.print(currentHour);
  lcd.print(":");
  if (currentMinute < 10) lcd.print("0");
  lcd.print(currentMinute);
  lcd.print(":");
  if (currentSecond < 10) lcd.print("0");
  lcd.print(currentSecond);

  delay(1000); // Update setiap 1 detik
}