#include <WiFi.h>
#include <PubSubClient.h>
#include <ESP32Servo.h>

Servo myservo;

const char* ssid = "Wokwi-GUEST"; // Corrigido: sem ponto
const char* password = "";
const char* mqtt_server = "test.mosquitto.org";

String my_payload;
String my_topic;

WiFiClient WOKWI_Client;
PubSubClient client(WOKWI_Client);

void setup_wifi() {
  delay(10);
  Serial.println();
  Serial.print("Connecting to ");
  Serial.println(ssid);

  WiFi.mode(WIFI_STA);
  WiFi.begin(ssid, password);

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

  Serial.println("");
  Serial.println("WiFi connected");
  Serial.print("IP address: ");
  Serial.println(WiFi.localIP());
}

void callback(char* topic, byte* payload, unsigned int length) {
  String conc_payload;
  for (int i = 0; i < length; i++) {
    conc_payload += (char)payload[i];
  }
  my_payload = conc_payload;
  my_topic = topic;
  Serial.print(my_topic);
  Serial.print(" : ");
  Serial.println(my_payload);
}

void reconnect() {
  while (!client.connected()) {
    Serial.print("Attempting MQTT connection...");
   if (client.connect("WOKWI_Client_xyz")) {
      Serial.println("connected");
     client.subscribe("ESP32_RECEBE");
    } else {
      Serial.print("failed, rc=");
      Serial.print(client.state());
     Serial.println(" try again in 5 seconds");
      delay(5000);
    }
  }
}

void setup() {
  pinMode(2, OUTPUT);  // WiFi LED
  
  pinMode(15, OUTPUT); // MQTT LED
  Serial.begin(115200);
  setup_wifi();
  client.setServer(mqtt_server, 1883);
  client.setCallback(callback);
  myservo.attach(18);
}

void Conexao_WIFI() {
  if (WiFi.status() == WL_CONNECTED) {
    digitalWrite(2, HIGH);
  } else {
    digitalWrite(2, LOW);
  }
}

void Conexao_MQTT() {
  if (client.connected()) {
    digitalWrite(15, HIGH);
  } else {
    digitalWrite(15, LOW);
  }
}

int Valor_Analogico;
int Valor_Analogico_Anterior;

void Analogico() {
  Valor_Analogico = my_payload.toInt();
  if (Valor_Analogico != Valor_Analogico_Anterior) {
    Valor_Analogico_Anterior = Valor_Analogico;
    Serial.println(Valor_Analogico);
    myservo.write(Valor_Analogico);
    delay(100);
  }
}

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