// #include <WiFiClientSecure.h>
#include <WiFi.h>
#include <PubSubClient.h>
#include "secrets.h"
#include "DHT.h"
#include <SimpleTimer.h>
#define DHTPIN 33
#define DHTTYPE DHT22
DHT dht(DHTPIN, DHTTYPE);
int led1=25;
// Simpletimer timer1{};
SimpleTimer send_temp;

// WiFiClientSecure espClient;
WiFiClient espClient;
PubSubClient client(espClient);
void send_temp_mqtt() {
    // put your main code here, to run repeatedly:
  float temperature = dht.readTemperature();
  float humidity = dht.readHumidity();

  // Check if any reads failed and exit early (to try again).
  if (isnan(temperature) || isnan(humidity)) {
    Serial.println(F("Failed to read from DHT sensor!"));
    return;
  }
  client.publish("oldk/teach/room/temp", String(temperature).c_str());
   client.publish("oldk/teach/room/hum", String(humidity).c_str());
  Serial.print(F("Humidity: "));
  Serial.print(humidity);
  Serial.print(F("%  Temperature: "));
  Serial.print(temperature);
  Serial.println(F("°C "));
}
void reconnect() {
  // Loop until we're reconnected
  while (!client.connected()) {
    Serial.print("Attempting MQTT connection...");
    char clientId[100] = "\0";
    sprintf(clientId, "ESP32Client-%04X", random(0xffff));
    Serial.println(clientId);
    if (client.connect(clientId,mqtt_username, mqtt_password)) {
      Serial.println("connected");
      // Subscribe or resubscribe to a topic
      // … and resubscribe
      // You can subscribe to more topics (to control more LEDs in this example)
       client.subscribe("oldk/room/lamp");
    } else {
      Serial.print("failed, rc=");
      Serial.print(client.state());
      Serial.println(" try again in 5 seconds");
      // Wait 5 seconds before retrying
      delay(5000);
    }
  }
}
void callback(String topic, byte* message, unsigned int length) {
  Serial.print("Message arrived on topic: ");
  Serial.print(topic);
  Serial.print(". Message: ");
  String messageTemp;

  for (int i = 0; i < length; i++) {
    Serial.print((char)message[i]);
    messageTemp += (char)message[i];
  }
  Serial.println(messageTemp);
    if (topic == "oldk/room/lamp") {
    Serial.print("Changing Room lamp to ");
    if (messageTemp == "on") {
      Serial.print("On");
    } else if (messageTemp == "off") {
      Serial.print("Off");
    }
  }
}
void setup_wifi() { 
  delay(10);
  // We start by connecting to a WiFi network
  Serial.println();
  Serial.print("Connecting to ");
  Serial.println(ssid);

  WiFi.mode(WIFI_STA); 
  WiFi.begin(ssid, password); 

  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 setup() {
  // put your setup code here, to run once:
  Serial.begin(115200);
  Serial.println("Hello, ESP32!");
  Serial.print("Connecting to WiFi");
  pinMode(led1,OUTPUT);
  setup_wifi(); 
  dht.begin();
  delay(1000);  // Add a delay here
  send_temp.setInterval(3000);
  Serial.println(" Connected!");
  client.setServer(mqtt_server, 1883);
  client.setCallback(callback);
  
}

void loop() {
    if (!client.connected()) {
    reconnect();
  }
  client.loop();
  if (send_temp.isReady()) {                    // Check is ready a second timer
        send_temp_mqtt();
        send_temp.reset();                        // Reset a second timer
    }
}