#include <WiFi.h>
#include <PubSubClient.h>

#define led1 4 // Pin LED 1
#define led2 2 // Pin LED 2

const char* ssid = "Wokwi-GUEST";
const char* password = "";
const char* mqtt_server = "test.mosquitto.org";

// Topik untuk masing-masing lampu
const char* mqtt_topic_led1 = "sesi25/led1";
const char* mqtt_topic_led2 = "sesi25/led2";

WiFiClient espClient;
PubSubClient client(espClient);

void setup_wifi() {
  delay(10);
  Serial.println();
  Serial.print("Connecting to ");
  Serial.println(ssid);
  WiFi.begin(ssid, password);
  while (WiFi.status() != WL_CONNECTED) {
    delay(500);
    Serial.print(".");
  }
  Serial.println("");
  Serial.println("WiFi connected");
}

// Fungsi callback saat pesan diterima
void callback(char* topic, byte* payload, unsigned int length) {
  Serial.print("Pesan diterima [");
  Serial.print(topic);
  Serial.print("]: ");
  for (int i = 0; i < length; i++) {
    Serial.print((char)payload[i]);
  }
  Serial.println();

  // Konversi payload ke string untuk kemudahan
  String message;
  for (int i = 0; i < length; i++) {
    message += (char)payload[i];
  }

  // Menangani topik untuk LED 1
  if (strcmp(topic, mqtt_topic_led1) == 0) {
    if (message == "1") {
      digitalWrite(led1, HIGH);
      Serial.println("LED 1 Dinyalakan");
    } else if (message == "0") {
      digitalWrite(led1, LOW);
      Serial.println("LED 1 Dimatikan");
    }
  }

  // Menangani topik untuk LED 2
  else if (strcmp(topic, mqtt_topic_led2) == 0) {
    if (message == "1") {
      digitalWrite(led2, HIGH);
      Serial.println("LED 2 Dinyalakan");
    } else if (message == "0") {
      digitalWrite(led2, LOW);
      Serial.println("LED 2 Dimatikan");
    }
  }
}

void reconnect() {
  while (!client.connected()) {
    Serial.print("Menghubungkan ke MQTT...");
    if (client.connect("mqttx_ecd7a585")) {
      Serial.println("Terhubung ke MQTT!");
      // Subscribe ke masing-masing topik
      client.subscribe(mqtt_topic_led1);
      client.subscribe(mqtt_topic_led2);
    } else {
      Serial.print("Gagal, rc=");
      Serial.print(client.state());
      Serial.println(" Coba lagi dalam 5 detik...");
      delay(5000);
    }
  }
}

void setup() {
  Serial.begin(115200);
  setup_wifi();
  client.setServer(mqtt_server, 1883);
  client.setCallback(callback);

  // Inisialisasi pin LED sebagai output
  pinMode(led1, OUTPUT);
  pinMode(led2, OUTPUT);
}

void loop() {
  if (!client.connected()) {
    reconnect();
  }
  client.loop();
}