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




// credencias para acesso a rede e ao MQTT mosquito
// o nosso broker é o mosquito: broker.mqtt-dashboard.com

const char* ssid = "Wokwi-GUEST";
const char* password = "";
const char* mqtt_server = "test.mosquitto.org";

//variaveis para recebimento de valores
String my_payload;
String my_topic;

WiFiClient WOKWI_client;
PubSubClient client(WOKWI_client);


void setup_wifi() {
  delay(10);
  // We start by connecting to a WiFi network
  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.println("IP address: ");
  Serial.println(WiFi.localIP());
}

void reconnect() {
  // Loop until we're reconnected
  while (!client.connected()) {
    Serial.print("Attempting MQTT connection...");
   
    if (client.connect("WOKWI_client")) {
      Serial.println("connected");
      client.subscribe("ESP_ALEK");
     
    } else {
      Serial.print("failed, rc=");
      Serial.print(client.state());
      Serial.println(" try again in 5 seconds");
      // Wait 5 seconds before retrying
      delay(5000);
    }
  }
}

void setup() {
  pinMode(2, OUTPUT);  
  pinMode(15, OUTPUT);  
  pinMode(19, OUTPUT);  
  Serial.begin(115200);
  setup_wifi();
  client.setServer(mqtt_server, 1883);
  client.setCallback(callback);
}

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

void recebe_dados(){
  if (my_payload == "A")
    digitalWrite(19, HIGH);
  if(my_payload =="a")
    digitalWrite(19, LOW);
}

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


void callback(char* topic, byte* payload, unsigned int length) {
  Serial.print("Message arrived [");
  Serial.print(topic);
  Serial.print("] ");

  // FUNÇÃO PARA CONCATENAR MSG
  String conc_payload;
  for (int i = 0; i < length; i++) {
    conc_payload += ((char)payload[i]);
  }
  my_topic = topic;
  my_payload = conc_payload;
}

// client.publish("TOPICO_WOKWI_Hivqs79",String(Valor_Pot).c_str());


void loop() {
    reconnect();
    Conectado_Wifi();
    Conectado_Mosquito();
    recebe_dados();
    client.loop();
}