#include <WiFi.h>
#include <WiFiClientSecure.h>
#include <UniversalTelegramBot.h>
#include <ArduinoJson.h>

// SSID dan Password WiFi
const char* ssid = "Wokwi-GUEST";
const char* password = "";

// Telegram BOT
#define BOTtoken "7111827908:AAFHy4wG3M26dLu9LmwElZYQiGwmQCvHDZs"
#define CHAT_ID "11933555"

#define pin_led   23  // Pin untuk LED


WiFiClientSecure client;
UniversalTelegramBot bot(BOTtoken, client);

// Cek Pesan Setiap 1 detik
int interval = 1000;
unsigned long waktu_terakhir;

void setup() {
  // Atur mode pin menjadi output
  pinMode(pin_led, OUTPUT);

  // Serial monitor
  Serial.begin(115200);
  
  // Hubungkan ke Wi-Fi
  WiFi.mode(WIFI_STA);
  WiFi.begin(ssid, password);
  client.setCACert(TELEGRAM_CERTIFICATE_ROOT);
  
  while (WiFi.status() != WL_CONNECTED) {
    delay(1000);
    Serial.println("Sedang menghubungkan ke WiFi..");
  }
  
  // Tampilkan IP Address
  Serial.println(WiFi.localIP());
}

void loop() {
  cek_pesan();
}

// Cek Pesan Terbaru
void cek_pesan() {
  if (millis() > waktu_terakhir + interval) {
    int banyakPesan = bot.getUpdates(bot.last_message_received + 1);
  
    while (banyakPesan) {
      handleNewMessages(banyakPesan);
      banyakPesan = bot.getUpdates(bot.last_message_received + 1);
    }
    waktu_terakhir = millis();
  }
}

// Memproses pesan yang diterima
void handleNewMessages(int numNewMessages) {
  for (int i = 0; i < numNewMessages; i++) {
    
    // Cek Chat ID
    String chat_id = String(bot.messages[i].chat_id);
    if (chat_id != CHAT_ID) {
      bot.sendMessage(chat_id, "Unauthorized user", "");
      continue;
    }
    
    // Terima pesan dari telegram
    String text = bot.messages[i].text;
    Serial.println(text);

    if (text == "/led1on") {
      bot.sendMessage(chat_id, "LED ON", "");
      digitalWrite(pin_led, HIGH);  // Nyalakan LED
    }
    
    if (text == "/led1off") {
      bot.sendMessage(chat_id, "LED OFF", "");
      digitalWrite(pin_led, LOW);  // Matikan LED
    }
  }
}