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

const char* ssid = "Wokwi-GUEST";
const char* password = "";

const char* mqttServer = "broker.hivemq.com";
int mqttPort = 1883;
const char* topicMQTT = "kinasih/iot/led";

WiFiClient espClient;
PubSubClient clientMQTT(espClient);

void connectToInternet();
void setupMQTT();
void reconnectMQTT();

#define pl1 22
#define pl2 23

void setup() {
  Serial.begin(115200);
  connectToInternet();
  setupMQTT();
  clientMQTT.setCallback(callback);
  pinMode(pl1, OUTPUT);
  pinMode(pl2, OUTPUT);
}

void loop() {
  if (!clientMQTT.connected()) {
    reconnectMQTT();
  }
  clientMQTT.loop();
}

void connectToInternet() {
  WiFi.begin(ssid, password);
  while (WiFi.status() != WL_CONNECTED) {
    delay(500);
    Serial.print(".");
  }
  Serial.println("");
  Serial.println("Connected to Wi-Fi");
  Serial.print("IP Address : ");
  Serial.println(WiFi.localIP());
}

void reconnectMQTT() {
  Serial.println("Connecting to MQTT Broker...");
  while (!clientMQTT.connected()) {
    Serial.println("Reconnecting to MQTT Broker..");
    String clientId = "ESP32Client-";
    clientId += String(random(0xffff), HEX);
    if (clientMQTT.connect(clientId.c_str())) {
      Serial.println("Connected.");
      clientMQTT.publish(topicMQTT, "LED Ready to control");
      clientMQTT.subscribe(topicMQTT);
    } else {
      Serial.print("failed, rc=");
      Serial.print(clientMQTT.state());
      Serial.println(" try again in 5 seconds");
      delay(5000);
    }
  }
}

void setupMQTT() {
  clientMQTT.setServer(mqttServer, mqttPort);
}

void callback(String topic, byte* payload, unsigned int length) {
  String remotelamp;
  Serial.print("Pesan diterima di topic : ");
  Serial.println(topic);
  Serial.print("Isi pesan yang diterima dari broker: ");
  for (int i = 0; i < length; i++) {
    Serial.print((char)payload[i]);
    remotelamp += (char)payload[i];
  }
  Serial.println("");
  Serial.println(remotelamp);

  if (topic == topicMQTT) {
    if (remotelamp == "ON1") {
      digitalWrite(pl1, HIGH);
    } else if (remotelamp == "OFF1") {
      digitalWrite(pl1, LOW);
    } else if (remotelamp == "ON2") {
      digitalWrite(pl2, HIGH);
    } else if (remotelamp == "OFF2") {
      digitalWrite(pl2, LOW);
    } else if (remotelamp == "ON1 ON2") {
      digitalWrite(pl1, HIGH);
      digitalWrite(pl2, HIGH);
    } else if (remotelamp == "OFF1 OFF2") {
      digitalWrite(pl1, LOW);
      digitalWrite(pl2, LOW);
    }
  }
}