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

#define pinDht 15
DHTesp dhtSensor;

#define WIFI_AP "Wokwi-GUEST"
#define WIFI_PASS ""

#define TB_SERVER "thingsboard.cloud"
#define TOKEN "5vtA4kAA6WPaHwX00yuJ"

constexpr uint16_t MAX_MESSAGE_SIZE = 128U;

WiFiClient espClient;
Arduino_MQTT_Client mqttClient(espClient);
ThingsBoard tb(mqttClient, MAX_MESSAGE_SIZE);

void connectToWifi(){
  Serial.println("Connect to Wifi ...");
  int attempts = 0;
  while(WiFi.status() != WL_CONNECTED && attempts < 20){
    WiFi.begin(WIFI_AP, WIFI_PASS, 6);
    delay(500);
    Serial.print(".");
    attempts++;
  }

  if(WiFi.status() != WL_CONNECTED){
    Serial.println("\nFailed to connect to Wifi");
  }else{
    Serial.println("\nConnect to Wifi");
  }
}

void connectToThingsBoard(){
  if(!tb.connected()){
    Serial.println(("Connecting to thingsBoard server"));

    if(!tb.connect(TB_SERVER, TOKEN)){
      Serial.println(("Failed to connect to thingsBoard"));
    }else{
      Serial.println(("Connect to thingsBoard"));
    }
  }
}

void sendDataToThingsBoard(float temp, int hum) {
  String jsonData = "{\"temperature\":" + String(temp) + ", \"humidity\":" + String(hum) + "}";
  tb.sendTelemetryJson(jsonData.c_str());
  Serial.println("Data sent");
}

void setup() {
  // put your setup code here, to run once:
  Serial.begin(115200);
  Serial.println("Hello, ESP32!");
  dhtSensor.setup(pinDht, DHTesp::DHT22);
  connectToWifi();
  connectToThingsBoard();
}

void loop() {
  // put your main code here, to run repeatedly:
  connectToWifi();
  TempAndHumidity data = dhtSensor.getTempAndHumidity();
  float temp = data.temperature;
  float hum = data.humidity;

  Serial.println(temp);
  Serial.println(hum);

  if(!tb.connected()){
    connectToThingsBoard();
  }
  sendDataToThingsBoard(temp, hum);
  delay(3000); // this speeds up the simulation

  tb.loop();
}