#define BLYNK_TEMPLATE_ID "TMPL26RsjPQpj"
#define BLYNK_TEMPLATE_NAME "PRATICA 04"
#define BLYNK_AUTH_TOKEN "UdO8HaSQ8kMZaiIRLIVPTmLyI0LtUuhW"

#include <WiFi.h>
#include <DHT.h>
#include <Arduino.h>
#include <freertos/FreeRTOS.h>
#include <freertos/task.h>
#include <freertos/semphr.h>
#include <BlynkSimpleEsp32.h>

#define Led 2
#define DHTPIN 21 
#define DHTTYPE DHT22 
DHT dht(DHTPIN, DHTTYPE);

// --- CORREÇÃO: Declaração do Timer do Blynk ---
BlynkTimer timer; 

float temperatura = 0;
float umidade = 0;
SemaphoreHandle_t xSerialSemaphore; 

char auth [] = BLYNK_AUTH_TOKEN;
char ssid [] = "Wokwi-GUEST";
char pass [] = "";

// Protótipos das tarefas
void TaskLed(void *pvParameters);
void TaskSensor(void *pvParameters);

void setup() {
  Serial.begin(115200);
  pinMode(Led, OUTPUT);

  // Inicializa Blynk
  Blynk.begin(auth, ssid, pass);
  
  // Inicializa Semáforo
  if (xSerialSemaphore == NULL) {
    xSerialSemaphore = xSemaphoreCreateMutex();
  }
  
  dht.begin();

  // Criação das Tarefas
  xTaskCreate(TaskLed, "LED", 2048, NULL, 3, NULL);
  xTaskCreatePinnedToCore(TaskSensor, "SENSOR", 10000, NULL, 2, NULL, 0);
  // Removi a TaskDisplay pois o LCD não estava no seu código atual
}

void loop() {
  // No FreeRTOS com Blynk, o loop principal cuida da conexão
  Blynk.run();
  timer.run();
}

// Tarefa para piscar LED via código (Independente do Blynk)
void TaskLed(void *pvParameters) {
  for (;;) {
    if (xSemaphoreTake(xSerialSemaphore, portMAX_DELAY) == pdTRUE) {
      digitalWrite(Led, HIGH);
      vTaskDelay(500 / portTICK_PERIOD_MS); 
      digitalWrite(Led, LOW);
      vTaskDelay(500 / portTICK_PERIOD_MS);
      xSemaphoreGive(xSerialSemaphore); 
    }
    vTaskDelay(10 / portTICK_PERIOD_MS); 
  }
}

// Tarefa para ler sensor e enviar ao Serial/Blynk
void TaskSensor(void *pvParameters) {
  for (;;) {
    float t = dht.readTemperature();
    float h = dht.readHumidity();

    if (xSemaphoreTake(xSerialSemaphore, portMAX_DELAY) == pdTRUE) {
      temperatura = t;
      umidade = h;
      
      if (isnan(t) || isnan(h)) {
        Serial.println("Erro no DHT!");
      } else {
        Serial.printf("Temp: %.1f | Umid: %.1f\n", t, h);
        // Envia para o App Blynk
        Blynk.virtualWrite(V1, t); 
        Blynk.virtualWrite(V2, h);
      }
      xSemaphoreGive(xSerialSemaphore);
    }
    vTaskDelay(2000 / portTICK_PERIOD_MS); // Sensor DHT precisa de 2s
  }
}

// Controle do Led via Botão no App Blynk (V0)
BLYNK_WRITE(V0) {
  int buttonState = param.asInt();
  digitalWrite(Led, buttonState);
  Serial.println(buttonState == HIGH ? "Led Ligado via Blynk" : "Led Desligado via Blynk");
}