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

const int DHT_PIN = 15;
DHTesp dht; 

const char* ssid = "Wokwi-GUEST";
const char* password = "";
const char* mqtt_server = "broker.mqtt-dashboard.com"; // HiveMQ public broker

WiFiClient espClient;
PubSubClient client(espClient);
unsigned long lastMsg = 0;
float temp = 0;
float hum = 0;

void setup_wifi() { 
  delay(10);
  Serial.println();
  Serial.print("Connecting to ");
  Serial.println(ssid);

  WiFi.mode(WIFI_STA); //setting wifi chip sebagai station/client
  WiFi.begin(ssid, password); //koneksi ke jaringan wifi

  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(topic);
  Serial.print("] ");
  payload[length] = '\0'; 
  String payloadStr = String((char*)payload);
  Serial.println(payloadStr);

  // Handle /rahad/lamp1 topic
  if (strcmp(topic, "/rahad/lamp1") == 0) {
    if (payloadStr == "true") {
      digitalWrite(13, HIGH);
    } else if (payloadStr == "false") {
      digitalWrite(13, LOW);
    }
  }

  // Handle /rahad/lamp2 topic
  if (strcmp(topic, "/rahad/lamp2") == 0) {
    if (payloadStr == "true") {
      digitalWrite(12, HIGH);
    } else if (payloadStr == "false") {
      digitalWrite(12, LOW);
    }
  }
}

void reconnect() { //fungsi reconnect
  while (!client.connected()) {
    Serial.print("Attempting MQTT connection...");
    String clientId = "clientId-8qyhJN99Ae";
    clientId += String(random(0xffff), HEX);
    if (client.connect(clientId.c_str())) {
      Serial.println("Connected");
      client.publish("/mqtt/rahad", "Rahadian Ilham"); //publish data ke HiveMQ broker
      client.subscribe("/rahad/lamp1"); //subscribe topic
      client.subscribe("/rahad/lamp2"); //subscribe topic
    } else {
      Serial.print("failed, rc=");
      Serial.print(client.state());
      Serial.println(" try again in 5 seconds");
      delay(5000);
    }
  }
}

void setup() {
  pinMode(13, OUTPUT); 
  pinMode(12, OUTPUT); 
  Serial.begin(115200);
  setup_wifi(); 
  client.setServer(mqtt_server, 8883); //koneksi ke HiveMQ broker
  client.setCallback(callback);
  dht.setup(DHT_PIN, DHTesp::DHT22); 
}

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

  unsigned long now = millis();
  if (now - lastMsg > 2000) { //perintah publish data
    lastMsg = now;
    TempAndHumidity data = dht.getTempAndHumidity();

    String temp = String(data.temperature, 2);
    client.publish("/rahad/temp", temp.c_str()); 
    
    String hum = String(data.humidity, 1);
    client.publish("/rahad/humi", hum.c_str()); 

    Serial.print("Temperature: ");
    Serial.println(temp);
    Serial.print("Humidity: ");
    Serial.println(hum);
  }
}