#include <WiFi.h>
#include <PubSubClient.h>
#include <Servo.h>
#include <Adafruit_Sensor.h>
#include <DHT.h>

// WiFi credentials
const char* ssid = "Wokwi-GUEST";
const char* password = "";

// MQTT broker
const char* mqtt_server = "test.mosquitto.org";
const char* mqtt_username = "";
const char* mqtt_password = "";

// MQTT topics
const char* servo_topic = "rumah/servo";
const char* dht_topic = "rumah/dht";

// Pin assignments
const int potentiometer_pin = 27;
const int photoresistor_pin = 26;
const int servo_pin = 21;
const int dht_pin = 18;

// Servo setup
Servo servo;

// DHT setup
#define DHTTYPE DHT22
DHT dht(dht_pin, DHTTYPE);

// WiFi and MQTT setup
WiFiClient espClient;
PubSubClient client(espClient);

// Function prototypes
void setup_wifi();
void callback(char* topic, byte* payload, unsigned int length);
void reconnect();
void readSensorsAndPublish();

void setup() {
  Serial.begin(115200);
  setup_wifi();
  client.setServer(mqtt_server, 1883);
  client.setCallback(callback);
  servo.attach(servo_pin);
  dht.begin();
}

void loop() {
  if (!client.connected()) {
    reconnect();
  }
  client.loop();
  readSensorsAndPublish();
  delay(1000); // Adjust as needed
}

void setup_wifi() {
  delay(10);
  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 callback(char* topic, byte* payload, unsigned int length) {
  // Handle incoming messages if needed
}

void reconnect() {
  while (!client.connected()) {
    Serial.print("Attempting MQTT connection...");
    if (client.connect("ESP32Client", mqtt_username, mqtt_password)) {
      Serial.println("connected");
      client.subscribe(servo_topic);
    } else {
      Serial.print("failed, rc=");
      Serial.print(client.state());
      Serial.println(" try again in 5 seconds");
      delay(5000);
    }
  }
}

void readSensorsAndPublish() {
  // Read potentiometer value
  int pot_value = analogRead(potentiometer_pin);
  // Read photoresistor value
  int photoresistor_value = analogRead(photoresistor_pin);
  // Read DHT22 sensor values
  float temperature = dht.readTemperature();
  float humidity = dht.readHumidity();

  // Publish sensor readings
  client.publish("rumah/potentiometer", String(pot_value).c_str());
  client.publish("rumah/photoresistor", String(photoresistor_value).c_str());
  client.publish("rumah/dht_temperature", String(temperature).c_str());
  client.publish("rumah/dht_humidity", String(humidity).c_str());
}

// Example function to control servo based on MQTT command
void controlServo(char* payload) {
  int angle = atoi(payload);
  servo.write(angle);
}