#include <WiFi.h> //Untuk mengaktifkan Wi-Fi ke ESP32
#include <WiFiClientSecure.h> //Untuk mengakses kata sandi pada Wi-Fi
#include <UniversalTelegramBot.h> //Untuk menghubungkan ke telegram
//Dalam program, gunakan perintah 'include' untuk menyertakan atau memasukkan library yang diperlukan
// Mengisi Identitas Wi-FI
#define WIFI_SSID "Wokwi-GUEST"
#define WIFI_PASSWORD "" //input kata sandi Wi-Fi
// Telegram BOT Token (Get from Botfather)
#define BOT_TOKEN "6802700397:AAGcS3BdTEokXX_CZXfHyQLZPeMhM1krAII"
const unsigned long BOT_MTBS = 1000; // jeda proses antara Telegram dan ESP32
WiFiClientSecure secured_client; //perintah untuk mengaktifkan kata sandi Wi-Fi
UniversalTelegramBot bot(BOT_TOKEN, secured_client); //perintah uuntuk membuat mengkoneksi BotTele dan kata sandi Wi - Fi
unsigned long bot_lasttime;
const int ledPin = 2; //untuk menyambungkan program ke pin 2 pada ESP
int ledStatus = 0; //input ledstatus (0 kondisi LED OFF dan 1 kondisi LED ON)
void handleNewMessages(int numNewMessages)
{
  Serial.print("handleNewMessages ");
  Serial.println(numNewMessages);
  for (int i = 0; i < numNewMessages; i++)
  {
    String chat_id = bot.messages[i].chat_id;
    String text = bot.messages[i].text;
    String from_name = bot.messages[i].from_name;
    if (from_name == "")
      from_name = "Guest";
    //untuk membaca ketika kondisi LED ON
    if (text == "/ledon")
    {
      digitalWrite(ledPin, HIGH); // turn the LED on (HIGH is the voltage level)
      ledStatus = 1;
      bot.sendMessage(chat_id, "Turn ON LED", "");
      Serial.println("Turn ON LED\n\n");
    }
    if (text == "/ledoff")
    {
      //untuk membaca ketika kondisi LED OFF
      ledStatus = 0;
      digitalWrite(ledPin, LOW); // turn the LED off (LOW is the voltage level)
      bot.sendMessage(chat_id, "Turn OFF LED", "");
      Serial.println("Turn OFF LED\n\n");
    }
    if (text == "/status")
    {
      if (ledStatus)
      {
        bot.sendMessage(chat_id, "LED is ON", "");
        Serial.println("LED is ON\n\n");
      }
      else
      {
        bot.sendMessage(chat_id, "LED is OFF", "");
        Serial.println("LED is OFF\n\n");
      }
    }
    if (text == "/start")
    {
      String welcome = "Welcome to Universal Arduino Telegram Bot library, " + from_name + ".\n";
      //Untuk memunculkan kata-kata di BotTele
      welcome += "This is Flash Led Bot switch.\n\n";
      welcome += "/ledon : to switch the Led ON\n";
      welcome += "/ledoff : to switch the Led OFF\n";
      welcome += "/status : Returns current status of LED\n";
      bot.sendMessage(chat_id, welcome, "Markdown");
    }
  }
}
void setup()
{
  Serial.begin(115200);
  Serial.println();
  pinMode(ledPin, OUTPUT); //Untuk mengatur pin nomor 2 sebagai output
  digitalWrite(ledPin, LOW); //untuk mengatur awal ketika LED diberi sumber kondisi LED dalam keadaan mati
  //Mencoba untuk terhubung ke jaringan WiFi:
  Serial.print("Connecting to Wifi SSID ");
  Serial.print(WIFI_SSID);
  WiFi.begin(WIFI_SSID, WIFI_PASSWORD);
  secured_client.setCACert(TELEGRAM_CERTIFICATE_ROOT); // Menambahkan root certificate ke api.telegram.org
  while (WiFi.status() != WL_CONNECTED)
  {
    Serial.print(".");
    delay(1000);
  }
  Serial.print("\nWiFi connected. IP address: ");
  Serial.println(WiFi.localIP());
  Serial.print("Retrieving time: ");
  configTime(0, 0, "pool.ntp.org"); //Mengatur waktu realtime di cetak ke Serial Monitor setiap detik
  time_t now = time(nullptr);
  while (now < 24 * 3600)
  {
    Serial.print(".");
    delay(100);
    now = time(nullptr);
  }
  Serial.println(now);
}
void loop()
{
  if (millis() - bot_lasttime > BOT_MTBS)
  {
    int numNewMessages = bot.getUpdates(bot.last_message_received + 1);
    while (numNewMessages)
    {
      Serial.println("got response");
      handleNewMessages(numNewMessages);
      numNewMessages = bot.getUpdates(bot.last_message_received + 1);
    }
    bot_lasttime = millis();
  }
}