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

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

WiFiClient espClient;
PubSubClient client(espClient);

void setup_wifi() {
  delay(10);

  Serial.println();
  Serial.print("Connecting to ");
  Serial.println(ssid);

  WiFi.mode(WIFI_STA);
  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) { 
  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/p/mqtt/led") {
    if ((char)payload[0] == '0') {
      digitalWrite(17, HIGH);
      Serial.println("Hidup");
    }
    if ((char)payload[0] == '1') {
      Serial.println("Mati");
      digitalWrite(17, LOW);
    }
    if ((char)payload[0] == '2') {
      Serial.println("Mundur");
      digitalWrite(16, HIGH);
    }
    if ((char)payload[0] == '3') {
      Serial.println("Mundur");
      digitalWrite(16, LOW);
    }
    if ((char)payload[0] == '4') {
      Serial.println("Kiri");
      digitalWrite(33, HIGH);
    }
    if ((char)payload[0] == '5') {
      Serial.println("Kiri Mati");
      digitalWrite(33, LOW);
    }
    if ((char)payload[0] == '6') {
      Serial.println("Kanan");
      digitalWrite(18, HIGH);
    }
    if ((char)payload[0] == '7') {
      Serial.println("Kanan Mati");
      digitalWrite(18, LOW);
    }
    if ((char)payload[0] == '8') {
      Serial.println("Maju");
      digitalWrite(5, HIGH);
    }
    if ((char)payload[0] == '9') {
      Serial.println("Maju Mati");
      digitalWrite(5, LOW);
    }
  }
}

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/p/mqtt/led");
    } else {
      Serial.print("failed, rc=");
      Serial.print(client.state());
      Serial.println(" try again in 5 seconds");
     
      delay(5000);
    }
  }
}

void setup() {
  pinMode(5, OUTPUT);
  pinMode(16, OUTPUT);
  pinMode(17, OUTPUT);
  pinMode(18, OUTPUT);
  pinMode(33, OUTPUT);

  Serial.begin(115200);
  setup_wifi();
  client.setServer(mqtt_server, 1883);
  client.setCallback(callback);
}

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