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

// --- Configurações de WiFi ---
const char* ssid = "Wokwi-GUEST"; // Ajuste para sua rede local se não for Wokwi
const char* password = "";

// --- Configurações MQTT (MAQIATTO) ---
const char* mqttserver = "maqiatto.com"; 
const int mqttport = 1883;

// ==========================================
// DADOS DA SUA CONTA MAQIATTO (PREENCHA AQUI)
// ==========================================
const char* mqttUser = "[email protected]";      // <<<< SEU EMAIL CADASTRADO NO MAQIATTO
const char* mqttPassword = "teste123";  // <<<< SUA SENHA DO MAQIATTO

// O prefixo do tópico no Maqiatto OBRIGATORIAMENTE deve ser "seu_email/nome_do_topico"
#define TOPIC_PREFIX  "[email protected]" 

WiFiClient espClient;
PubSubClient client(espClient);

// --- Pinos do Hardware (Mantive os que você enviou) ---
// Saídas
#define LED1_PIN 13
#define LED2_PIN 12

// Entradas Analógicas/Sensores
#define POT_PIN 33
#define LDR_PIN 35    
#define DHT_PIN 32      
#define DHTTYPE DHT22  

// Entradas Digitais (Botões)
#define BTN1_PIN 14
#define BTN2_PIN 27

// Inicializa o DHT
DHT dht(DHT_PIN, DHTTYPE);

// --- Variáveis de Controle ---
unsigned long lastMsg = 0;
const long interval = 2000; // 2 segundos

// Estados dos botões
int lastBtn1State = HIGH; 
int lastBtn2State = HIGH;

// --- Protótipos ---
void setup_wifi();
void callback(char* topic, byte* payload, unsigned int length);
void reconnect();
void checkButtons();

void setup() {
  Serial.begin(115200);

  // Configuração dos Pinos
  pinMode(LED1_PIN, OUTPUT);
  pinMode(LED2_PIN, OUTPUT);
  
  pinMode(POT_PIN, INPUT);
  pinMode(LDR_PIN, INPUT); 
  
  pinMode(BTN1_PIN, INPUT_PULLUP);
  pinMode(BTN2_PIN, INPUT_PULLUP);

  dht.begin();
  setup_wifi();
  
  client.setServer(mqttserver, mqttport);
  client.setCallback(callback);
}

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

  checkButtons();

  unsigned long now = millis();
  if (now - lastMsg > interval) {
    lastMsg = now;

    // --- 1. Leitura do Potenciômetro ---
    int potValue = analogRead(POT_PIN);
    float potPorcentagem = (potValue / 4095.0) * 100.0;
    String msgPot = String(potPorcentagem, 0);

    // --- 2. Leitura do LDR ---
    int ldrValue = analogRead(LDR_PIN);
    float ldrPorcentagem = (ldrValue / 4095.0) * 100.0;
    String msgLdr = String(ldrPorcentagem, 0);

    // --- 3. Leitura do DHT22 ---
    float h = dht.readHumidity();
    float t = dht.readTemperature();

    if (isnan(h) || isnan(t)) {
      Serial.println("Falha ao ler o DHT sensor!");
      // Não damos return aqui para garantir que os outros dados sejam enviados
    } else {
        String msgTemp = String(t, 1);
        String msgHum = String(h, 1);
        
        client.publish(TOPIC_PREFIX "/temp", msgTemp.c_str());
        client.publish(TOPIC_PREFIX "/hum", msgHum.c_str());
        
        Serial.printf("T: %sC | H: %s%% | ", msgTemp.c_str(), msgHum.c_str());
    }

    // --- Publicando Pot e LDR ---
    client.publish(TOPIC_PREFIX "/pot", msgPot.c_str());
    client.publish(TOPIC_PREFIX "/ldr", msgLdr.c_str());

    Serial.printf("Pot: %s%% | LDR: %s%%\n", msgPot.c_str(), msgLdr.c_str());
  }
}

void checkButtons() {
  int currentBtn1 = digitalRead(BTN1_PIN);
  int currentBtn2 = digitalRead(BTN2_PIN);

  if (currentBtn1 != lastBtn1State) {
    lastBtn1State = currentBtn1;
    String status = (currentBtn1 == LOW) ? "PRESSIONADO" : "SOLTO";
    client.publish(TOPIC_PREFIX "/btn1", status.c_str());
    delay(50); 
  }

  if (currentBtn2 != lastBtn2State) {
    lastBtn2State = currentBtn2;
    String status = (currentBtn2 == LOW) ? "PRESSIONADO" : "SOLTO";
    client.publish(TOPIC_PREFIX "/btn2", status.c_str());
    delay(50); 
  }
}

void setup_wifi() {
  delay(10);
  Serial.println();
  Serial.print("Conectando ao WiFi: ");
  Serial.println(ssid);

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

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

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

  if (String(topic) == TOPIC_PREFIX "/led1") {
    if (message == "1" || message == "on" || message == "ON") digitalWrite(LED1_PIN, HIGH);
    else if (message == "0" || message == "off" || message == "OFF") digitalWrite(LED1_PIN, LOW);
  }

  if (String(topic) == TOPIC_PREFIX "/led2") {
    if (message == "1" || message == "on" || message == "ON") digitalWrite(LED2_PIN, HIGH);
    else if (message == "0" || message == "off" || message == "OFF") digitalWrite(LED2_PIN, LOW);
  }
}

void reconnect() {
  while (!client.connected()) {
    Serial.print("Conectando ao Maqiatto...");
    
    // Cria um ID aleatório
    String clientId = "ESP32-Eduardo-";
    clientId += String(random(0xffff), HEX);

    // --- AQUI ESTÁ A MUDANÇA PRINCIPAL PARA O MAQIATTO ---
    // connect(clientId, username, password)
    if (client.connect(clientId.c_str(), mqttUser, mqttPassword)) {
      Serial.println("Conectado!");
      client.publish(TOPIC_PREFIX "/status", "Online");
      
      client.subscribe(TOPIC_PREFIX "/led1");
      client.subscribe(TOPIC_PREFIX "/led2");
    } else {
      Serial.print("Falha, rc=");
      Serial.print(client.state());
      Serial.println(" Tentando em 5s...");
      delay(5000);
    }
  }
}