#include <WiFi.h>
#include <WiFiClient.h>
#include <PubSubClient.h>
#include <LiquidCrystal_I2C.h>


LiquidCrystal_I2C lcd(0x27,16,2);


int ledPin = 2; 		// GPIO do LED
int ledState = LOW; 	//ESTADO DO LED
long previousMillis = 0; 	// will store last time LED
int interval = 1000;	//Intervalo para o Blink

const char* ssid = "Wokwi-GUEST";
const char* password = "";

const char* hostname = "test.mosquitto.org";

WiFiClient espClient;
PubSubClient client(espClient);
const char* espClientName = "191020050"; //Esse ID deverá ser unico
int PORTNUM = 1883;

void setup_wifi()
{
  WiFi.begin(ssid, password);
  while (WiFi.status() != WL_CONNECTED )
  {
    delay(1000);
    Serial.print(".");
  }
  Serial.println();
  Serial.print("Conectado a rede SSID: ");
  Serial.println(ssid);
  Serial.print("IP: ");
  Serial.println(WiFi.localIP());
}

void connectMQTT()
{
  while (!client.connected() )
  {
    Serial.println("Conectando ao MQTT ...");
    if (client.connect(espClientName) ) //, mqttUser, mqttPassword) )
    {
      Serial.println("Conectado");
      MQTTSubscribe();
    }
    else
    {
      Serial.print("Falha com Estado: ");
      Serial.print(client.state() );
      delay(2000);
    }
  }
}

void callback(String topic, byte* payload, unsigned int length)
{ 
  lcd.setCursor(1,1);
  String messageTemp;
  Serial.print("Mensagem recebida no TOPICO:");
  Serial.print(topic);
  Serial.print("O Tamanho da Mensagem: ");
  Serial.println(length);

  Serial.print("Dados Recebidos no Broker: ");
  for (int i = 0; i < length; i++)
  {
    messageTemp += (char)payload[i];
  }
  if (topic == "jorgenerico")
  {
    lcd.Clear();
    lcd.setCursor(0,0);
    lcd.print(mssageTemp.c_str());
  }
}

void MQTTSubscribe()
{
  client.subscribe("jorgenerico");
}

void setup_MQTT()
{
  client.setServer(hostname, PORTNUM);
  client.setCallback(callback);
}

void setup()
{
  Serial.begin(9600);
  delay(5000);
  lcd.init();
  lcd.backlight();
  lcd.setCursor(1,0);
  lcd.print("BOM DIA");


  setup_wifi();
  setup_MQTT();
  pinMode(ledPin, OUTPUT);
  digitalWrite(ledPin, LOW);

}

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

 
  long currentMillis = millis();

  if ( currentMillis - previousMillis >= interval)
  {
    previousMillis = currentMillis;
      int pot = analogRead(A0);
      String potString = String(pot);
      client.publish("jorgenerico", potString.c_str());
  }


}