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

// WiFi credentials (Wokwi auto-connects)
const char* ssid = "Wokwi-GUEST";
const char* password = "";

// MQTT Broker
const char* mqtt_server = "test.mosquitto.org";

WiFiClient espClient;
PubSubClient client(espClient);

// Connect WiFi
void setup_wifi() {
  Serial.print("Connecting to WiFi...");
  WiFi.begin(ssid, password);

  while (WiFi.status() != WL_CONNECTED) {
    delay(500);
    Serial.print(".");
  }

  Serial.println("\nWiFi connected!");
}

// Connect MQTT
void reconnect() {
  while (!client.connected()) {
    Serial.print("Connecting to MQTT...");

    if (client.connect("ESP32Client")) {
      Serial.println("connected!");
    } else {
      Serial.print("failed, rc=");
      Serial.print(client.state());
      delay(2000);
    }
  }
}

void setup() {
  Serial.begin(115200);

  setup_wifi();

  client.setServer(mqtt_server, 1883);
}

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

  client.loop();

  // Send dummy data
  int temp = random(20, 40);

  String msg = "{\"temperature\": " + String(temp) + "}";

  Serial.print("Publishing: ");
  Serial.println(msg);

  client.publish("esp32/test", msg.c_str());

  delay(5000);
}