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

char clientId[50];
WiFiClient espClient;
PubSubClient client(espClient);
CRGB leds[1];

void callback(char* topic, byte* message, unsigned int length) 
{
  String stMessage;
  for (int i = 0; i < length; i++) 
  {
    stMessage += (char)message[i];
  }

  if(stMessage == "Out")
  {
    leds[0] = CRGB::Red;
    FastLED.show();
    Serial.println("Out!!");
  }

  else if(stMessage == "Not Out")
  {
    leds[0] = CRGB::Green;
    FastLED.show();
    Serial.println("Not Out !!");
  }

  else{

    leds[0] = CRGB::Blue;
    FastLED.show();
    Serial.println("Decision Pending !!")

  }
 // Add codes to control NeoPixel LED
}

void loop() 
{
  delay(100);
  if (!client.connected()) 
  {
    mqttReconnect();
  }
  client.loop(); 
}

void setup(){
  Serial.begin(115200);
  WiFi.mode(WIFI_STA);
  WiFi.begin("Wokwi-GUEST", " ");
  client.setServer("broker.emqx.io", 1883);
  client.setCallback(callback);
  FastLED.addLeds <NEOPIXEL, 5> (leds, 1);
}

void mqttReconnect() 
{

  while(!client.connected()){
    Serial.print("Attempting MQTT Connection ........  ");
    if(client.connect(clientId)){
      Serial.println("Connected");
      client.subscribe("topicName");

    }


  else{
    Serial.println("Connection Failed. Try Agian In 5 Seconds");
    delay(5000);
  }
  }
}