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

#define WIFI_SSID "Wokwi-GUEST"
#define WIFI_PASSWORD ""
#define BOTtoken "put yor bot token"
#define CHAT_ID "write your id telegram"


WiFiClientSecure client;
UniversalTelegramBot bot(BOTtoken, client);

const long interval = 1000;  // 1 seconde
long lastTime = 0;

// GPIO 4 pour la LED
const int ledPin = 4;  
bool ledStatus = false;

void handleNewMessages(int numNewMessages) {
  for (int i = 0; i < numNewMessages; i++)
  {
    String text = bot.messages[i].text;
    
    // Commande pour allumer la LED
    if (text == "/on")
    {
      digitalWrite(ledPin, HIGH);  // Allume la LED
      ledStatus = true;
      bot.sendMessage(CHAT_ID, "LED ON", "");
      Serial.println("LED allumée");
    }

    // Commande pour éteindre la LED
    if (text == "/off")
    {
      digitalWrite(ledPin, LOW);   // Éteint la LED
      ledStatus = false;
      bot.sendMessage(CHAT_ID, "LED OFF", "");
      Serial.println("LED éteinte");
    }

    // Commande pour vérifier l'état de la LED
    if (text == "/status")
    {
      if (ledStatus)
      {
        bot.sendMessage(CHAT_ID, "LED is ON", "");
      }
      else
      {
        bot.sendMessage(CHAT_ID, "LED is OFF", "");
      }
    }

    // Commande d'aide
    if (text == "/help")
    {
      String help = "Commands:\n";
      help += "/on - Turn ON the LED \n";
      help += "/off - Turn OFF the LED 🔦\n";
      help += "/status - Check LED status\n";
      help += "/help - Show this message";
      bot.sendMessage(CHAT_ID, help, "");
    }
  }
}

void setup() {
  Serial.begin(115200);
  delay(100);
  Serial.println("\n\n================================");
  Serial.println("ESP32 Telegram LED Controller");
  Serial.println("================================\n");

  // Configuration de la broche LED comme sortie
  pinMode(ledPin, OUTPUT);
  digitalWrite(ledPin, LOW);  // LED éteinte au démarrage
  Serial.println("LED pin configurée sur GPIO " + String(ledPin));

  // Connexion WiFi
  Serial.print("Connexion à WiFi: ");
  Serial.println(WIFI_SSID);
  WiFi.mode(WIFI_STA);
  WiFi.begin(WIFI_SSID, WIFI_PASSWORD);

  int attempts = 0;
  while (WiFi.status() != WL_CONNECTED && attempts < 20)
  {
    Serial.print(".");
    delay(500);
    attempts++;
  }

  if (WiFi.status() == WL_CONNECTED)
  {
    Serial.println("\nWiFi connecté!");
    Serial.print("Adresse IP: ");
    Serial.println(WiFi.localIP());
  }
  else
  {
    Serial.println("\nConnexion WiFi échouée");
  }

  // Configuration du client sécurisé
  client.setCACert(TELEGRAM_CERTIFICATE_ROOT);

  // Synchronisation de l'heure (important pour HTTPS)
  Serial.println("Synchronisation de l'heure NTP...");
  configTime(0, 0, "pool.ntp.org");
  delay(2000);

  // Message de démarrage
  bot.sendMessage(CHAT_ID, " ESP32 LED Bot démarré!\nTapez /help pour les commandes", "");
  Serial.println(" Bot Telegram prêt!\n");
}

void loop() {
  // Vérifier les nouveaux messages toutes les 1 seconde
  if (millis() - lastTime > interval)
  {
    int numNewMessages = bot.getUpdates(bot.last_message_received + 1);

    while (numNewMessages)
    {
      Serial.println("Réponse de Telegram reçue");
      handleNewMessages(numNewMessages);
      numNewMessages = bot.getUpdates(bot.last_message_received + 1);
    }
    lastTime = millis();
  }
}