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

// Update these with values suitable for your network.

const char* ssid = "Wokwi-GUEST";
const char* password = "";
const char* mqtt_server = "broker.hivemq.com";
const int mqtt_port = 1883;

WiFiClient espClient;
PubSubClient client(espClient);

void setup_wifi() {
  delay(10);
  Serial.println();
  Serial.print("Connecting to ");
  Serial.println(ssid);
  WiFi.begin(ssid, password);
  while (WiFi.status() != WL_CONNECTED) {
    delay(500);
    Serial.print(".");
  }

  randomSeed(micros());

  Serial.println("");
  Serial.println("WiFi connected");
  Serial.println("IP address: ");
  Serial.println(WiFi.localIP());
}

void callback(char* topic, byte* payload, unsigned int length) {
  // Handle incoming messages here
  Serial.print("Message arrived [");
  Serial.print(topic);
  Serial.print("] ");
  for(int i = 0; i<length; i++){
    Serial.print((char)payload[i]);
  }
  Serial.println();

  if(String(topic) == "myskill/test/mqtt/ledmerah"){
    Serial.println("dapet merah");
    if((char)payload[0] =='0'){
      digitalWrite(4, LOW);
    }
    if((char)payload[0] =='1'){
      digitalWrite(4, HIGH);
    }
  }
  if(String(topic) == "myskill/test/mqtt/ledbiru"){
    Serial.println("dapet biru");
    if((char)payload[0] =='0'){
      digitalWrite(17, LOW);
    }
    if((char)payload[0] =='1'){
      digitalWrite(17, HIGH);
    }
  }
}

void reconnect() {
  while (!client.connected()) {
    Serial.print("Attempting MQTT connection...");

    String clientId = "ESP32Client-";
    clientId += String(random(0xffff), HEX);
    if (client.connect(clientId.c_str())) {
      Serial.println("connected");
      client.subscribe("myskill/test/mqtt/ledmerah");
      client.subscribe("myskill/test/mqtt/ledbiru");
    } else {
      Serial.print("failed, rc=");
      Serial.print(client.state());
      Serial.println(" try again in 5 seconds");
      delay(5000);
    }
  }
}

void setup() {
  Serial.begin(115200);
  pinMode(4, OUTPUT);
  pinMode(17, OUTPUT);
  setup_wifi();
  client.setServer(mqtt_server, mqtt_port);
  client.setCallback(callback);
}

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