#include <WiFi.h>
#include <PubSubClient.h>
const char* ssid = "Wokwi-GUEST";
const char* pass = "";

WiFiClient wifiClient;
PubSubClient mqtt(wifiClient);
const char* mqttServer = "test.mosquitto.org";
int port = 1883;

void callback(char* topic, byte* payload, unsigned int length) {
  //função chamada quando alguma mensagem recebida no tópico
  String msg = "";
  for (int i = 0; i < length; i++) {
    msg = msg + String((char)payload[i]);
  }
  Serial.println("Mensagem: " + msg);
}
void reconnectMQTT() {
  static unsigned long wait = millis();
  unsigned long delayms = 5000UL;

  if (!mqtt.connected() && (millis() > wait)) {
    Serial.println("Conectando ao servidor mqtt...");
    if (mqtt.connect("esp32Client")) {
      Serial.println("Connectado!");
      mqtt.subscribe("npititopicout");
    } else {
      Serial.print("Falhou, rc=");
      Serial.print(mqtt.state());
      Serial.println(" tentando novamente em 5 s.");
      wait = millis() + delayms;
    }
  }
}

int btnPin = 14;
int btnState = 1;
int count = 0;

void setup() {
  // put your setup code here, to run once:
  Serial.begin(115200);
  Serial.print("Iniciando conexçao com ");
  Serial.println(ssid);
  WiFi.begin(ssid, pass);
  while (WiFi.status() != WL_CONNECTED) {
    Serial.print('.');
    delay(500);
  }
  Serial.println();
  Serial.println("Conexão bem sucedida!");
  Serial.print("Ip local: "); Serial.println(WiFi.localIP().toString());

  mqtt.setServer(mqttServer, port);
  mqtt.setCallback(callback);

  pinMode(btnPin, INPUT_PULLUP);
}

void loop() {
  // put your main code here, to run repeatedly:
  reconnectMQTT();
  btnState = digitalRead(btnPin);
  if (!btnState) {
    count++;
    Serial.println(btnState);
    if (mqtt.connected())
      mqtt.publish("npititopicin", String(count).c_str());
    delay(200);
  }
  mqtt.loop();
  delay(10); // this speeds up the simulation
}