#include <WiFi.h>
#include <PubSubClient.h>
#include <DHT.h>

#define BUILTIN_LED 2
#define externalLedPin 25
#define MOVI 19
#define DHTPin 15
#define luzPin 34
#define WIFI_SSID "Wokwi-GUEST"
#define WIFI_PASSWORD ""

const char* mqtt_server = "test.mosquitto.org";
 

WiFiClient espClient;
PubSubClient client(espClient);
unsigned long lastMsg = 0;
#define MSG_BUFFER_SIZE	(50)
char msg[MSG_BUFFER_SIZE];
int value = 0;
DHT dht(DHTPin, DHT22); 


void setup_wifi() {
  delay(10);
  // We start by connecting to a WiFi network
  Serial.println();
  Serial.print("Connecting to ");
  Serial.println(WIFI_SSID);

  WiFi.mode(WIFI_STA);
  WiFi.begin(WIFI_SSID, WIFI_PASSWORD);

  while (WiFi.status() != WL_CONNECTED) {
    delay(500);
    Serial.print(".");
  }

  dht.begin();

  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("] ");
  
  // Imprime a mensagem recebida como string
  payload[length] = '\0';  // Garante que a mensagem seja tratada como string
  Serial.println((char*)payload);

  // Verifica o tópico recebido
  if (strcmp(topic, "control/led") == 0) {
    if ((char)payload[0] == '0') {
      digitalWrite(BUILTIN_LED, LOW);  // Desliga o LED interno
      Serial.println("LED INTERNO DESLIGADO");
    } else if ((char)payload[0] == '1') {
      digitalWrite(BUILTIN_LED, HIGH);  // Liga o LED interno
      Serial.println("LED INTERNO LIGADO");
    }
  } 
  else if (strcmp(topic, "control/externalLed") == 0) {
    if ((char)payload[0] == '0') {
      digitalWrite(externalLedPin, LOW);  // Desliga o LED externo
      Serial.println("LED EXTERNO DESLIGADO");
    } else if ((char)payload[0] == '1') {
      digitalWrite(externalLedPin, HIGH);  // Liga o LED externo
      Serial.println("LED EXTERNO LIGADO");
    }
  }
}


void reconnect() {
  // Loop until we're reconnected
  while (!client.connected()) {
    Serial.print("Attempting MQTT connection...");
    // Create a random client ID
    String clientId = "ESP32Client-";
    clientId += String(random(0xffff), HEX);
    // Attempt to connect
    if (client.connect(clientId.c_str())) {
      Serial.println("connected");
      // Once connected, publish an announcement...
      //client.publish("outOutTopic", "starting....");
      // ... and resubscribe
      client.subscribe("control/externalLed");
      //client.subscribe("control/led");
    } else {
      Serial.print("failed, rc=");
      Serial.print(client.state());
      Serial.println(" try again in 5 seconds");
      delay(5000);
    }
  }
}

void setup() {
  Serial.begin(115200);
  pinMode(BUILTIN_LED, OUTPUT);     // Initialize the LED pin as an output
  digitalWrite(BUILTIN_LED, LOW);  // Turn the LED off  Serial.begin(115200);
  pinMode(externalLedPin, OUTPUT);
  digitalWrite(externalLedPin, LOW);
  setup_wifi();
  client.setServer(mqtt_server, 1883);
  client.setCallback(callback);
  pinMode(MOVI, INPUT);
}

void loop() {
  if (!client.connected()) {
    reconnect();
  }
  client.loop();
  
  int humidity = dht.readHumidity();
  int temperature = dht.readTemperature();
  int luz = analogRead(luzPin);
  int movimento = digitalRead(MOVI);

  if (isnan(humidity) || isnan(temperature)) {
    Serial.println("Failed to read from DHT sensor!");
    return;
  }

  char tempString[15];
  char humString[15];
  char luzString[15];
  char movimentoString[15];

  sprintf(tempString, "%d", temperature);
  sprintf(humString, "%d", humidity);
  sprintf(luzString, "%d", luz);
  sprintf(movimentoString, "%d", movimento);

  client.publish("sensor/temperatura", tempString);
  client.publish("sensor/umidade", humString);
  client.publish("sensor/luz", luzString);
  client.publish("sensor/movimento", movimentoString);


  Serial.println("Publicando: Temperatura: " + String(temperature)
  + " Umidade: " + String(humidity)
  + " Luz: "+ String(luz)
  + " Movimento: " + String(movimento));

  delay(2000);
}