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


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

// Initialize Telegram BOT
#define BOTtoken "1814579181:AAGUasYhK6z43R9XWL3exoEzdA2CXyAsA3g"
#define CHAT_ID "1209015823"

#define pin_relay   2

WiFiClientSecure client;
UniversalTelegramBot bot(BOTtoken, client);

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

void setup() {
  // atur mode pin menjadi output
  pinMode(pin_relay, 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..");
  }
  
  // IP Address
  Serial.println(WiFi.localIP());
  Serial.print("Atur Waktu: ");
  configTime(0, 0, "pool.ntp.org"); 
  time_t now = time(nullptr);
  while (now < 24 * 3600)
  {
    Serial.print(".");
    delay(100);
    now = time(nullptr);
  }
  Serial.println(now);
}

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) {
      Serial.println("got response");
      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);

    String from_name = bot.messages[i].from_name;

    if (text == "/start") {
      String welcome = "Selamat Datang, " + from_name + ".\n";
      welcome += "Komen berikut untuk ON/OFF Server.\n\n";
      welcome += "/on_server untuk LED Merah ON \n";
      welcome += "/off_server untuk LED Merah OFF \n";
      welcome += "/status_server mendapatkan status SERVER \n";
  
      bot.sendMessage(chat_id, welcome, "");
    }

    if (text == "/on_server") {
      bot.sendMessage(chat_id, "SERVER ON", "");
      digitalWrite(pin_relay, HIGH);
      delay(1000);
      digitalWrite(pin_relay, LOW);
    }
    
    if (text == "/off_server") {
      bot.sendMessage(chat_id, "SERVER OFF", "");
      digitalWrite(pin_relay, HIGH);
      delay(5000);
      digitalWrite(pin_relay, LOW);
    }

    if (text == "/status_server") {
      if (digitalRead(pin_relay)){
        bot.sendMessage(chat_id, "LED Merah ON", "");
      }
      else{
        bot.sendMessage(chat_id, "LED Merah OFF", "");
      }
    }
  }
}

// void led_merah(bool isOn){
//   if(isOn){
//     digitalWrite(pin_relay, HIGH);
//   }
//   else{
//     digitalWrite(pin_relay, LOW);
//   }
// }