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

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

const char* mqtt_server = "mqtt-dashboard.com";
const int mqtt_port = 8884;

const char* topic = "esp32/led/state"; // Topic que tu veux utiliser
const int ledPin = 32;

WiFiClientSecure wifiClient;
PubSubClient client(wifiClient);

void setup_wifi() {
  WiFi.begin(ssid, password);
  while (WiFi.status() != WL_CONNECTED) {
    delay(500);
  }
}

void reconnect() {
  while (!client.connected()) {
    if (client.connect("esp32_led_client")) {
      client.subscribe(topic);
    } else {
      delay(5000);
    }
  }
}

void callback(char* topic, byte* payload, unsigned int length) {
  String msg;
  for (unsigned int i = 0; i < length; i++) {
    msg += (char)payload[i];
  }
  if (msg == "on") {
    digitalWrite(ledPin, HIGH);
  } else if (msg == "off") {
    digitalWrite(ledPin, LOW);
  }
}

void setup() {
  pinMode(ledPin, OUTPUT);
  Serial.begin(115200);
  setup_wifi();
  wifiClient.setInsecure(); // Important pour SSL sur Wokwi sans certificat
  client.setServer(mqtt_server, mqtt_port);
  client.setCallback(callback);
}

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

  // Envoie on/off toutes les 5s pour test
  static unsigned long lastMsg = 0;
  static bool ledState = false;

  if (millis() - lastMsg > 5000) {
    lastMsg = millis();
    ledState = !ledState;
    String msg = ledState ? "on" : "off";
    client.publish(topic, msg.c_str());
    Serial.println("Publié : " + msg);
  }
}