#include <WiFi.h>
#include <PubSubClient.h> //buuth kedua library ini untuk support IoT

const int LED = 9;

const char* ssid = "virus";
const char* password = "123456789"; //unutk jika menggunakan WiFi asli

const char* mqtt_server = "0.tcp.ap.ngrok.io"; //MQTT Broker Public = free server
int port = 11176;

WiFiClient espClient;
PubSubClient client(espClient); //inisialisasi library

void callback(char* topic, byte* message, unsigned int length) { //fungsi yang bakal dijalanin jika kita dapat notif baru
  String messageTemp;
  for (int i = 0; i < length; i++) {
    messageTemp += (char)message[i];
  }

  if (String(topic) == "/test/osc/3") {
    if(messageTemp == "on"){
      Serial.println("Menyalakan lampu");
      digitalWrite(LED, HIGH);
    }
    else if(messageTemp == "off"){
      Serial.println("Mematikan lampu");
      digitalWrite(LED, LOW);
    }
  }
}

void reconnect() {
  while (!client.connected()) {
    Serial.print("Mencoba konek ke MQTT broker...");
    if (client.connect("ESP32Client")) {
      Serial.println("berhasil konek ke MQTT broker");
      client.subscribe("/test/osc/3");
    } else {
      Serial.print("gagal konek, rc=");
      Serial.print(client.state());
      delay(5000);
    }
  }
}

void setup() {
  // put your setup code here, to run once:
  Serial.begin(115200);
  delay(1000);

  pinMode(LED, OUTPUT);
  // pinMode(LED_BUILTIN, OUTPUT);

  WiFi.mode(WIFI_STA); //Optional
  // WiFi.begin(ssid, password);
  WiFi.begin("Wokwi-GUEST", "", 6);
  Serial.println("\nMencoba konek");

  while(WiFi.status() != WL_CONNECTED){
      Serial.print(".");
      delay(100);
  }

  Serial.println("\nBerhasil konek ke jaringan WiFi");
  Serial.print("Local ESP32 IP: ");
  Serial.println(WiFi.localIP());

  client.setServer(mqtt_server, port);
  client.setCallback(callback);
}

void loop() {
  if (!client.connected()) {
    Serial.println("koneksi MQTT broker terputus");
    reconnect();
  }
  client.loop();
}