#define BLYNK_TEMPLATE_ID "TMPL6iIdVKLAa"
#define BLYNK_TEMPLATE_NAME "Led Controller"
#define BLYNK_AUTH_TOKEN "RBbZzea0vIovW2al0B_5xQfoYkLdz3-F"

#include <WiFi.h>
#include <BlynkSimpleEsp32.h>

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

// ===== LED CONFIG =====
int ledPins[10] = {23,22,21,19,18,5,17,16,4,2};
bool ledState[10] = {0};

// ===== ĐẾM LED =====
int countLedOn() {
  int count = 0;
  for (int i = 0; i < 10; i++) {
    if (ledState[i]) count++;
  }
  return count;
}

// ===== UPDATE COUNT =====
void updateLedCount() {
  int count = countLedOn();
  Blynk.virtualWrite(V20, count);

  Serial.print("LED ON: ");
  Serial.println(count);
}

// ===== SYNC TỪ HARDWARE → BLYNK =====
void syncHardwareToBlynk() {
  for (int i = 0; i < 10; i++) {
    int state = digitalRead(ledPins[i]);  // đọc trạng thái thực tế
    ledState[i] = state;

    Blynk.virtualWrite(i, state); // cập nhật app
  }

  updateLedCount();
}

// ===== CALLBACK KHI CONNECT =====
BLYNK_CONNECTED() {
  syncHardwareToBlynk();
}

// ===== MACRO GIẢM LẶP CODE =====
#define BLYNK_LED_HANDLER(vpin, index) \
BLYNK_WRITE(vpin) { \
  int s = param.asInt(); \
  digitalWrite(ledPins[index], s); \
  ledState[index] = s; \
  updateLedCount(); \
}

// ===== CONTROL TỪNG LED =====
BLYNK_LED_HANDLER(V0, 0)
BLYNK_LED_HANDLER(V1, 1)
BLYNK_LED_HANDLER(V2, 2)
BLYNK_LED_HANDLER(V3, 3)
BLYNK_LED_HANDLER(V4, 4)
BLYNK_LED_HANDLER(V5, 5)
BLYNK_LED_HANDLER(V6, 6)
BLYNK_LED_HANDLER(V7, 7)
BLYNK_LED_HANDLER(V8, 8)
BLYNK_LED_HANDLER(V9, 9)

// ===== ALL LED =====
BLYNK_WRITE(V10) {
  int state = param.asInt();

  for (int i = 0; i < 10; i++) {
    digitalWrite(ledPins[i], state);
    ledState[i] = state;
    Blynk.virtualWrite(i, state); // sync lại từng nút
  }

  updateLedCount();
}

// ===== SETUP =====
void setup() {
  Serial.begin(115200);

  for (int i = 0; i < 10; i++) {
    pinMode(ledPins[i], OUTPUT);
    digitalWrite(ledPins[i], LOW); // trạng thái ban đầu
  }

  Blynk.begin(BLYNK_AUTH_TOKEN, ssid, pass);
}

// ===== LOOP =====
void loop() {
  Blynk.run();
}