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

const char* ssid = "Wokwi-GUEST";
const char* password = "";
const char* mqtt_server = "test.mosquitto.org";
const int mqtt_port = 1883;
// const char* mqtt_username = "";
// const char* mqtt_password = "";
const char* mqtt_topic = "GrupUnimed/actuate_lamp";
WiFiClient espClient;
PubSubClient client(espClient);

int led1 = 14;
int led2 = 15;

void callback(char* topic, byte* payload, unsigned int length) {
  if (length == 0) return;
  String msg = "";
  for (int i = 0; i < length; i++) {
    msg += (char)payload[i];
  }
  if (msg == "Turn Off") {
    digitalWrite(led1, LOW);
    digitalWrite(led2, LOW);
  }
  else if (msg == "Turn On") {
    digitalWrite(led1, HIGH);
    digitalWrite(led2, LOW); // Hidupkan hanya LED 1
  }
  else if (msg == "Turn On All") {
    digitalWrite(led1, HIGH);
    digitalWrite(led2, HIGH); // Hidupkan kedua LED
  }
}

void setup_wifi() {
  delay(10);
  Serial.begin(115200);
  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.println("WiFi connected");
  Serial.println("IP address: ");
  Serial.println(WiFi.localIP());
}

void reconnect() {
  while (!client.connected()) {
    Serial.print("Attempting MQTT connection...");
    if (client.connect("Hamzah17")) {
      Serial.println("connected");
      client.subscribe(mqtt_topic);
    } else {
      Serial.print("failed, rc=");  
      Serial.print(client.state());
      Serial.println(" try again in 5 seconds");
      delay(5000);
    }
  }
}

void setup() {
  pinMode(led1, OUTPUT);
  pinMode(led2, OUTPUT);
  setup_wifi();
  client.setServer(mqtt_server, mqtt_port);
  client.setCallback(callback);
}

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