#include <PubSubClient.h>
#include <WiFi.h>
#define RELAY_PIN 22
#define RELAY_PIN_1 23
const char* ssid="Wokwi-GUEST";
const char* password="";

const char* mqtt_server= "66.29.142.107";

WiFiClient espClient_diego;
PubSubClient client(espClient_diego);
long lastMsg=0;

void setup() 
{
  Serial.begin(115200);
  setup_wifi();
  client.setServer(mqtt_server,1883);
  client.setCallback(callback);
  pinMode(RELAY_PIN, OUTPUT);
  pinMode(RELAY_PIN_1, OUTPUT);
}

void setup_wifi() {
  delay(10);
  // We start by connecting to a WiFi network
  Serial.println();
  Serial.print("Connecting to ");
  Serial.println(ssid);
  WiFi.begin(ssid, password);
  while (WiFi.status() != WL_CONNECTED) {
    delay(500);
    Serial.print(".");
  }
  Serial.println("");
  Serial.print("WiFi connected - IP address: ");
  Serial.println(WiFi.localIP());
}

void reconnect(){
  while(!client.connected()){
    Serial.print("Intentando conectar a MQTT broker...");
    if (client.connect("ESP32Client")){
      Serial.println("conectado");
      client.subscribe("RELAY_PIN");
      client.subscribe("RELAY_PIN_1");
    }else{
      Serial.print("fallido, rc=");
      Serial.print(client.state());
      Serial.println("Intente de nuevo en 5s");
      delay(5000);
    }
  }
}


void callback(char* topic, byte* message,
              unsigned int length){

  Serial.print("Mensaje recibido en el topico:");
  Serial.print(topic);
  Serial.print(". Mensage: ");
  String messageTemp;

  for (int i=0; i < length; i++){
  Serial.print((char)message[i]);
  messageTemp += (char)message[i];
  }

  Serial.println();

  if (String(topic) == "RELAY_PIN"){
    Serial.print("Cambiando la salida a :");
    if(messageTemp=="true"){
      Serial.println("on");
      digitalWrite(RELAY_PIN, HIGH);
    }
    else if (messageTemp=="false"){
      Serial.println("off");
      digitalWrite(RELAY_PIN, LOW);
    }
  }

  if (String(topic) == "RELAY_PIN_1"){
    Serial.print("Cambiando la salida 1 a :");
    if(messageTemp=="true"){
      Serial.println("on");
      digitalWrite(RELAY_PIN_1, HIGH);
    }
    else if (messageTemp=="false"){
      Serial.println("off");
      digitalWrite(RELAY_PIN_1, LOW);
    }
  }
}




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

  long now=millis();

    if (now - lastMsg>2000){
      lastMsg=now;
    }

}