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

const int LED_VERDE = 2;
const int LED_VERMELHO = 15;
const int PONTENCIOMETER = 34;

const char* ssid = "Wokwi-GUEST";
const char* password = ""; //incluir senha na implementação física
const char* mqtt_server = "broker.hivemq.com"; //redireciona para a conexão para o test mosquitto

WiFiClient WOKWI_Client; // cria um objeto wi-fi para comunicação
PubSubClient client(WOKWI_Client); //Cria um objeto cliente mqtt associado 

void setup() {
  Serial.begin(9600);
  pinMode(LED_VERDE, OUTPUT);
  pinMode(LED_VERMELHO, OUTPUT);
  pinMode(PONTENCIOMETER, INPUT);
  setup_wifi();
  client.setServer(mqtt_server,1883);
}

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

  wifi_on();
  broker_on();

  delay(100); 

  publish_mqtt();
}


void setup_wifi()
{

  delay(10);

  Serial.println();
  Serial.print("Connecting to ");
  Serial.println(ssid);

  WiFi.mode(WIFI_STA); //ativa o modo cliente do wi-fi(sta -> station mode > ele vai se conectar ao um ponto de acesso.)
  WiFi.begin(ssid, password);

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

  randomSeed(micros());

  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...");

    // Create a random client ID
    // String clientId = "ESP8266Client-";
    // clientId += String(random(0xffff), HEX);
    // Attempt to connect

    if (client.connect("WOKWI_Client")) {
      Serial.println("connected");
      // Once connected, publish an announcement...
      // client.publish("outTopic", "hello world");
      // ... and resubscribe
      // client.subscribe("inTopic");
    
    } else {
      Serial.print("failed, rc=");
      Serial.println(client.state());
      Serial.println(" try again in 5 seconds");
      // Wait 5 seconds before retrying
      delay(50);
    }
  }
}

// Function designated to publish data to the broker
void publish_mqtt(){
    int valor_pot; //declara variavel
    valor_pot = analogRead(PONTENCIOMETER); // coleta
    Serial.println(valor_pot);
    client.publish("public_pot_vav_afk", String(valor_pot).c_str());
    delay(1000);
}

void wifi_on(){
  if(WiFi.status()){
    digitalWrite(LED_VERMELHO,HIGH);
  } else {
    digitalWrite(LED_VERMELHO, LOW);
  }
}

void broker_on(){
  if(client.connected()){
    digitalWrite(LED_VERDE,HIGH);
  } else {
    digitalWrite(LED_VERDE, LOW);
  }
}