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

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

// MQTT broker
const char* mqtt_server = "pings-112.cloud.shiftr.io";
const int   mqtt_port   = 1883;
const char* mqtt_user   = "pings-112";
const char* mqtt_pass   = "pinsss";

// Topik status
const char* topic_status = "esp32/status";

WiFiClient espClient;
PubSubClient client(espClient);

void setup_wifi() {
  Serial.print("Menghubungkan ke WiFi ");
  Serial.println(ssid);
  WiFi.begin(ssid, password);
  while (WiFi.status() != WL_CONNECTED) {
    delay(500);
    Serial.print(".");
  }
  Serial.println("\nWiFi terhubung!");
}

void reconnect() {
  while (!client.connected()) {
    Serial.print("Menghubungkan ke broker MQTT...");
    String clientId = "ESP32Client-" + String(random(0xffff), HEX);

    if (client.connect(clientId.c_str(), mqtt_user, mqtt_pass)) {
      Serial.println("TERHUBUNG!");
      client.publish(topic_status, "online", true);  // kirim status online
    } else {
      Serial.print("Gagal, rc=");
      Serial.print(client.state());
      delay(2000);
    }
  }
}

void setup() {
  Serial.begin(115200);
  setup_wifi();
  client.setServer(mqtt_server, mqtt_port);

  // 👉 SetWill sederhana
  client.setWill(topic_status, "offline", true, 0);
}

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

  // Hanya contoh log
  Serial.println("ESP32 masih hidup...");
  delay(3000);
}