#include <WiFi.h>
#include <PubSubClient.h>
#define LED 22

// WiFi
const char *ssid = "Wokwi-GUEST"; // Enter your WiFi name
const char *password = "";  // Enter WiFi password

// MQTT Broker
const char *mqtt_broker = "broker.mqtt.cool";
const char *topic = "/Faikar/actuate_lamp";
const char *mqtt_username = "faikar";
const char *mqtt_password = "faikar";
const int mqtt_port = 1883;

WiFiClient espClient;
PubSubClient client(espClient);

void turn_on_lamp(){
  digitalWrite(LED, HIGH);
  Serial.println("Turning on lamp");
}

void turn_off_lamp(){
  digitalWrite(LED, LOW);
}

void setup() {
  //setup LED
  pinMode(LED, OUTPUT);
 // Set software serial baud to 115200;
 Serial.begin(115200);
 // connecting to a WiFi network
 WiFi.begin(ssid, password);
 while (WiFi.status() != WL_CONNECTED) {
     delay(500);
     Serial.println("Connecting to WiFi..");
 }
 Serial.println("Connected to the WiFi network");
 //connecting to a mqtt broker
 client.setServer(mqtt_broker, mqtt_port);
 client.setCallback(callback);
 while (!client.connected()) {
     String client_id = "esp32-client-";
     client_id += String(WiFi.macAddress());
     Serial.printf("The client %s connects to the public mqtt broker\n", client_id.c_str());
     if (client.connect(client_id.c_str(), mqtt_username, mqtt_password)) {
         Serial.println("Public emqx mqtt broker connected");
     } else {
         Serial.print("failed with state ");
         Serial.print(client.state());
         delay(2000);
     }
 }
 // publish and subscribe
 client.publish(topic, "Turn Off");
 client.subscribe(topic);
}

void callback(char *topic, byte *payload, unsigned int length) {
 Serial.print("Message arrived in topic: ");
 Serial.println(topic);
 Serial.print("Message:");
 char pesan[length + 1]; // +1 untuk null-terminator
 for (int i = 0; i < length; i++) {
     Serial.print((char) payload[i]);
     pesan[i] = (char) payload[i];
 }
 pesan[length] = '\0'; // Menambahkan null-terminator pada akhir string
 Serial.println(pesan);
 if(strcmp(pesan, "Turn on") == 0)
     turn_on_lamp();
 else if(strcmp(pesan, "Turn off") == 0)
     turn_off_lamp();
 Serial.println("-----------------------");
}



void loop() {
 client.loop();
}