//#include <ESP8266WiFi.h>
#include <WiFi.h>
#include <PubSubClient.h>

//variaveis para recebimento de valores


const char* ssid = "Wokwi-GUEST";
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);
  // 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("IOT_SUPREMO_MAQUINA1_SENSOR1");

    } 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(22, OUTPUT);
  pinMode(21, OUTPUT);
  pinMode(23, INPUT_PULLDOWN);
  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 Conectado_Mosquito(){
  if (client.connected())
  digitalWrite(15, HIGH);
  else
  digitalWrite(15, LOW);
}

//Função para mandar informações para o Node-red
void Publica_Sensor() {
  boolean machineState = digitalRead(23);
  String message = "";
  if (machineState) {
    message += "off";
    digitalWrite(22, HIGH);
    tone(21, 132, 250);
  } else {
    digitalWrite(22, LOW);
    message += "on";
  }

  client.publish("IOT_SUPREMO_MAQUINA4_BOTAO", String(message).c_str());
  Serial.println("Machine: " + message);
  Serial.println("---");
  delay(1000);
}


//Função para recebimento de dados do Node-red
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;
  Serial.println(conc_payload);
}

void recebe_dados(){
  Serial.println(my_payload);
}

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