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

const int DHT_PIN = 15;

DHTesp dhtSensor;

const char* ssid = "Wokwi-GUEST";
const char* password = "";

//const char* mqtt_server = "test.mosquitto.org";
const char* mqtt_server = "mqtt-dashboard.com"; 
//const char* mqtt_server = "broker.mqttdashboard.com";

/*terdapat 2 server karena HiveMQ terjadi gangguan jadi 
diputuskan untuk membuat MQTT server cadangan menggunakan 
Mosquitto, 
Pemilihan HiveMQ karena tidak sering terjadi reconnecting
seperti Mosquitto dalam kasus simulasi Wokwi
*/

WiFiClient espClient;
PubSubClient client(espClient);
unsigned long lastMsg = 0;
#define MSG_BUFFER_SIZE  (50)
float temp = 0;
float hum = 0;
int value = 0;
const int ledPin = 2; 


void setup_wifi() {

  delay(10);
  // memulai terkoneksi dengan WiFi
  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(".");
  }  

  Serial.println("");
  Serial.println("WiFi connected");
  Serial.println("IP address: ");
  Serial.println(WiFi.localIP());
  pinMode(ledPin, OUTPUT);
}

void reconnect() {
  // Loop until we're reconnected
  while (!client.connected()) {
    Serial.print("Attempting MQTT connection...");
    // Create a random client ID
    String clientId = "MqttDashboard-4720445";
    clientId += String(random(0xffff), HEX);
    // Attempt to connect
    if (client.connect(clientId.c_str())) {
      Serial.println("Connected");
      // Once connected, publish an announcement...
      // client.publish("test/mqtt/rizky", "Indobot");
    } else {
      Serial.print("failed, rc=");
      Serial.print(client.state());
      Serial.println(" try again in 5 seconds");
      // Wait 5 seconds before retrying
      delay(1000);
    }
  }
}

void callback(char* topic, byte* message, unsigned int length) {
  Serial.print("Message arrived on topic: ");
  Serial.print(topic);
  Serial.print(". Message: ");
  String stMessage;
  
  for (int i = 0; i < length; i++) {
    Serial.print((char)message[i]);
    stMessage += (char)message[i];
  }
  Serial.println();

  if (String(topic) == "User1/Temp/DTS1") {
    Serial.print("Changing output to ");
    if(stMessage == "on"){
      Serial.println("on");
      digitalWrite(ledPin, HIGH);
    }
    else if(stMessage == "off"){
      Serial.println("off");
      digitalWrite(ledPin, LOW);
    }
  }
}

void setup() {
  Serial.begin(115200);
  setup_wifi();
  client.setServer(mqtt_server, 1883);
  
  dhtSensor.setup(DHT_PIN, DHTesp::DHT22);
}

void loop() {

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

  unsigned long now = millis();
  if (now - lastMsg > 2000) {
    lastMsg = now;
    TempAndHumidity  data = dhtSensor.getTempAndHumidity();

    String temp = String(data.temperature, 2);
    Serial.print("Temperature: ");
    Serial.println(temp);
    client.publish("User1/Temp/DTS1", temp.c_str()); //ditambah DTS terdapat user yan gmenggunakan topik sama
    
    String hum = String(data.humidity, 1);
    Serial.print("Humidity: ");
    Serial.println(hum);
    client.publish("User1/Hum/DTS1", hum.c_str());
  }
}