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

const int DHT_PIN = 23;  // Chỉnh lại pin DHT11/DHT22

DHTesp dhtSensor;

const char* MQTTServer = "broker.hivemq.com";
const char* MQTT_Topic_ND = "ND";  // Topic cho nhiệt độ
const char* MQTT_Topic_DA = "DA";  // Topic cho độ ẩm

// Tạo ID ngẫu nhiên tại: https://www.guidgen.com/
const char* MQTT_ID = "";
int Port = 1883;

WiFiClient espClient;
PubSubClient client(espClient);

void WIFIConnect() {
  Serial.println("Connecting to SSID: Wokwi-GUEST");
  WiFi.begin("Wokwi-GUEST", "");
  while (WiFi.status() != WL_CONNECTED) {
    delay(500);
    Serial.print(".");
  }
  Serial.println("");
  Serial.print("WiFi connected");
  Serial.print(", IP address: ");
  Serial.println(WiFi.localIP());
}

void MQTT_Reconnect() {
  while (!client.connected()) {
    if (client.connect(MQTT_ID)) {
      Serial.println("MQTT connected");
      client.subscribe(MQTT_Topic_ND);
      client.subscribe(MQTT_Topic_DA);
    } else {
      Serial.print("failed, rc=");
      Serial.print(client.state());
      Serial.println(" try again in 5 seconds");
      delay(5000);
    }
  }
}

void callback(char* topic, byte* message, unsigned int length) {
  // Handle incoming messages here if needed
}

void setup() {
  Serial.begin(115200);

  WIFIConnect();
  client.setServer(MQTTServer, Port);
  client.setCallback(callback);
  dhtSensor.setup(DHT_PIN, DHTesp::DHT22);
}

void loop() {
  TempAndHumidity data = dhtSensor.getTempAndHumidity();
  Serial.println("Nhiệt độ: " + String(data.temperature, 2) + "°C");
  Serial.println("Độ ẩm: " + String(data.humidity, 1) + "%");

  Serial.println("---");
  delay(1000);

  if (!client.connected()) {
    MQTT_Reconnect();
  }

  char NHIETDO[100];
  byte len = 50;
  String ND = String(data.temperature, 2) + "°C";
  ND.toCharArray(NHIETDO, len);

  char DOAM[100];
  byte len2 = 50;
  String DA = String(data.humidity, 1) + "%";
  DA.toCharArray(DOAM, len2);

  client.publish(MQTT_Topic_ND, NHIETDO);
  client.publish(MQTT_Topic_DA, DOAM);
  client.loop();
}