#include <ESP8266WiFi.h>
#include <Servo.h>
#include <WiFiClient.h>
#include <ESP8266HTTPClient.h>

const char* ssid = "YOUR_SSID"; // Ganti dengan SSID Wi-Fi Anda
const char* password = "YOUR_PASSWORD"; // Ganti dengan password Wi-Fi Anda

const String botToken = "YOUR_BOT_TOKEN"; // Ganti dengan token bot Telegram Anda
const String chatID = "YOUR_CHAT_ID"; // Ganti dengan ID chat Telegram Anda

const int mq135Pin = A0;    // Pin sensor MQ-135
const int flamePin = A1;     // Pin sensor api
const int servoPin = D2;     // Pin servo
const int buzzerPin = D3;    // Pin Buzzer

Servo myServo;               // Buat objek servo
bool isAlarmActive = false;  // Status alarm

void setup() {
  Serial.begin(115200);
  myServo.attach(servoPin);
  myServo.write(0);          // Posisi awal servo
  pinMode(buzzerPin, OUTPUT); // Set pin buzzer sebagai output
  
  // Koneksi Wi-Fi
  WiFi.begin(ssid, password);
  while (WiFi.status() != WL_CONNECTED) {
    delay(500);
    Serial.print(".");
  }
  Serial.println("Connected to Wi-Fi");
}

void loop() {
  int mq135Value = analogRead(mq135Pin);  // Membaca nilai MQ-135
  int flameValue = analogRead(flamePin);  // Membaca nilai sensor api

  Serial.print("MQ-135 Value: ");
  Serial.print(mq135Value);
  Serial.print(" | Flame Value: ");
  Serial.println(flameValue);

  // Deteksi gas
  if (mq135Value > 400 || flameValue < 300) {  // Sesuaikan threshold sesuai kebutuhan
    if (!isAlarmActive) { // Cek jika alarm belum aktif
      Serial.println("Gas or Fire Detected!");
      sendNotification("PERHATIAN!!!! ADA KEBOCORAN GAS DIRUMAH");
      activateAlarm();
      isAlarmActive = true; // Set alarm aktif
    }
  } else if (isAlarmActive) { // Reset alarm jika tidak ada deteksi
    sendNotification("OKEE AMAN!!! REGULATOR SUDAH TERLEPAS, ALIRAN GAS SUDAH TERPUTUS");
    isAlarmActive = false; // Reset status alarm
  }

  delay(1000); // Delay 1 detik sebelum membaca lagi
}

void sendNotification(String message) {
  if (WiFi.status() == WL_CONNECTED) {
    WiFiClient client; // Buat objek WiFiClient
    HTTPClient http;
    String url = "https://api.telegram.org/bot" + botToken + "/sendMessage?chat_id=" + chatID + "&text=" + message;
    
    http.begin(client, url); // Menggunakan client dan URL
    int httpResponseCode = http.GET();

    if (httpResponseCode > 0) {
      String response = http.getString();
      Serial.println(httpResponseCode);
      Serial.println(response);
    } else {
      Serial.print("Error on sending GET: ");
      Serial.println(httpResponseCode);
    }
    http.end();
  } else {
    Serial.println("WiFi not connected");
  }
}

void activateAlarm() {
  myServo.write(90);      // Ubah posisi servo untuk memutuskan aliran gas
  for (int i = 0; i < 5; i++) { // Buzzer berbunyi 5 kali
    digitalWrite(buzzerPin, HIGH);
    delay(200);            // Durasi buzzer menyala
    digitalWrite(buzzerPin, LOW);
    delay(200);            // Durasi buzzer mati
  }
  myServo.write(0);       // Kembali ke posisi awal servo
}