#include "WiFi.h"
#include "PubSubClient.h"

// WiFi
const char* ssid = "Wokwi-GUEST";
const char* pass = "";

// MQTT Broker
// const char* brokerUser = "antariot";
// const char* brokerPass = "admin@1234";
// const char* broker = "192.168.68.123";
const char* broker = "192.168.68.133";
const char* clientid = "99e1d680-ebdd-4865-a19f-9e336a698776";
const int port = 1883;   

const char* outTopic ="/light/out";

WiFiClient espClient;
PubSubClient client(espClient);

void setupWiFi() {
  delay(100);
  Serial.print("\nConnecting to ");
  Serial.println(ssid);
  WiFi.mode(WIFI_STA);
  WiFi.begin(ssid, pass);

  while (WiFi.status() != WL_CONNECTED) {
    delay(100);
    Serial.print(".");
  }

  Serial.print("\nConnected to ");
  Serial.println(ssid);
}

void reconnect() {
  while (!client.connected()) {
    Serial.print("Connecting to ");
    Serial.println(broker);

    // if (client.connect(clientid, brokerUser, brokerPass))
    if (client.connect(clientid)) {
      Serial.println("Connected to MQTT broker");
      client.subscribe(outTopic);
    } else {
      Serial.print("Failed to connect. Retrying in 5 seconds...");
      Serial.println(client.state());
      delay(5000);
    }
  }
}

void setup() {
  Serial.begin(115200);
  setupWiFi();
  client.setServer(broker, port);
  client.setCallback(callback);
}

void loop() {
  if (!client.connected()) {
    reconnect();
  }
  else{
  client.loop();
  client.publish("topic_in/msg","Hello");
  Serial.println("Hello");
  delay(1000);
  }
}

void callback(char* topic, byte* message, unsigned int length){
  Serial.print("Messages arrived on topic: ");
  Serial.println(topic);
  Serial.print(". Message: ");
  String messageTemp;
  
  for(int i=0;i<length;i++){
    Serial.print((char) message[i]);
    messageTemp += (char)message[i];
  }
  Serial.println();
}