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

const int DHT_PIN = 15;
DHTesp dht;

const char* ssid = "Wokwi-GUEST";
const char* password = "";
const char* mqtt_server = "test.mosquitto.org";


#define LED1 26
#define LED2 27

WiFiClient espClient;
PubSubClient client(espClient);
unsigned long lastMsg = 0;
#define MSG_BUFFER_SIZE	(50)
char msg[MSG_BUFFER_SIZE];
int value = 0;

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 callback(char* topic, byte* payload, unsigned int length) {
  Serial.print("Message arrived [");
  Serial.print(topic);
  Serial.print("] ");

  // for (int i = 0; i < length; i++) {
  //   Serial.print((char)payload[i]);
  // }

    char dadosChar[length - 1];
    for (int i = 0; i < length; i++) {
      dadosChar[i] = ((char)payload[i]);
    }

    String stringOne = dadosChar;
    stringOne.remove(2);
  // Switch on the LED if an 1 was received as first character
  if (stringOne.equals("1L")) {
    digitalWrite(LED1, HIGH);  // Turn the LED off
    Serial.println("LED LIGADO");
  } else if (stringOne.equals("1D")) {
    digitalWrite(LED1, LOW); // Turn the LED on
    Serial.println("LED DESLIGADO");
  }
  if (stringOne.equals("2L")) {
    digitalWrite(LED2, HIGH);  // Turn the LED off
    Serial.println("LED2 LIGADO");
  } else if (stringOne.equals("2D")) {
    digitalWrite(LED2, LOW); // Turn the LED on
    Serial.println("LED2 DESLIGADO");
  }  else {
    Serial.println(stringOne);
  }


}

void reconnect() {
  // Loop until we're reconnected
  while (!client.connected()) {
    Serial.print("Attempting MQTT connection...");
    // Create a random client ID
    String clientId = "2023204014";
    clientId += String(random(0xffff), HEX);
    // Attempt to connect
    if (client.connect(clientId.c_str())) {
      Serial.println("connected");
      // Once connected, publish an announcement...
      client.publish("Out2023204014", "starting....");
      // ... and resubscribe
      client.subscribe("In2023204014");

    } else {
      Serial.print("failed, rc=");
      Serial.print(client.state());
      Serial.println(" try again in 5 seconds");
      delay(5000);
    }
  }
}

void setup() {

  // Initialize the LED pin as an output
  pinMode(LED1, OUTPUT);
  pinMode(LED2, OUTPUT);     
  Serial.begin(115200);
  setup_wifi();
  client.setServer(mqtt_server, 1883);
  client.setCallback(callback);

  dht.setup(DHT_PIN, DHTesp::DHT22);
}

void loop() {
  if (!client.connected()) {
    reconnect();
  }
  client.loop();
  unsigned long now = millis();
  

  if (now - lastMsg > 3000) {

  TempAndHumidity  data = dht.getTempAndHumidity();
  //Leitura da umidade
  String t = String(data.temperature, 2);
  //Leitura da temperatura (Celsius)
  String h = String(data.humidity, 1);

    lastMsg = now;
    ++value;
    snprintf (msg, MSG_BUFFER_SIZE, "Id: #%ld  Temperatura: %s  Humidade: %s", value, t + "C", h + "%");
    // Serial.print("Temperatura : " + t + "°C \t");
    // Serial.println("Humidade: " + h + "%");
    Serial.print("Publish message: ");
    Serial.println(msg);
    client.publish("Out2023204014", msg);
  }

}