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

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

// MQTT server nastavenia
const char* mqtt_server = "broker.hivemq.com";
const int mqtt_port = 1883;
const char* mqtt_topic = "esp32/senzory";

// Inicializácia WiFi a MQTT
WiFiClient espClient;
PubSubClient client(espClient);

void setup_wifi() {
  delay(10);
  Serial.println();
  Serial.print("Pripájam sa na WiFi: ");
  Serial.println(ssid);

  WiFi.begin("Wokwi-GUEST", "", 6);
  while (WiFi.status() != WL_CONNECTED) {
    delay(1000);
    Serial.print(".");
  }

  Serial.println();
  Serial.println("WiFi pripojené");
}

void reconnect() {
  while (!client.connected()) {
    Serial.print("Pripájam sa na MQTT server...");
    if (client.connect("ESP32Client")) {
      Serial.println("Pripojený");
    } else {
      Serial.print("Zlyhanie, rc=");
      Serial.print(client.state());
      Serial.println(" Znovu pokus o 5 sekúnd");
      delay(3000);
    }
  }
}

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

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

  // Simulované údaje (nahradiť reálnymi dátami zo senzorov)
  float teplota = random(20, 30);
  float vlhkost = random(40, 60);

  // Vytvorenie JSON správy
  String payload = "{\"teplota\": " + String(teplota) + ", \"vlhkost\": " + String(vlhkost) + "}";
  Serial.println("Odosielam: " + payload);

  // Publikovanie na MQTT
  client.publish(mqtt_topic, payload.c_str());

  delay(3000); // Časový interval odosielania
}