class GetKeyEvent {
private:
  bool stable = false;
  bool lastRaw = false;
  unsigned long lastChange = 0;
  unsigned long lastRepeat = 0;

  unsigned long debounceTime = 50;
  unsigned long repeatDelay = 1000;
  unsigned long repeatInterval = 300;

  enum State { Idle, Pressed, Repeating };
  State state = Idle;

public:
  void update(bool raw) {
    unsigned long now = millis();

    if (raw != lastRaw) {
      lastRaw = raw;
      lastChange = now;
    }

    bool debounced = stable;
    if ((now - lastChange) >= debounceTime) {
      debounced = raw;
    }

    switch (state) {
      case Idle:
        if (debounced && !stable) {
          stable = true;
          state = Pressed;
          lastRepeat = now;
        }
        break;

      case Pressed:
        if (!debounced) {
          stable = false;
          state = Idle;
        } else if ((now - lastRepeat) >= repeatDelay) {
          state = Repeating;
          lastRepeat = now;
        }
        break;

      case Repeating:
        if (!debounced) {
          stable = false;
          state = Idle;
        }
        break;
    }
  }

  bool keyPressed() const {
    return (state == Pressed && stable);
  }

  bool keyRepeated() {
    if (state == Repeating) {
      unsigned long now = millis();
      if ((now - lastRepeat) >= repeatInterval) {
        lastRepeat = now;
        return true;
      }
    }
    return false;
  }

  bool keyReleased() const {
    return (!stable && state == Idle);
  }

  bool isDown() const {
    return stable;
  }
};

GetKeyEvent keyA;
GetKeyEvent keyB;

// Usage
void loop() {
  // Replace with real input logic:
  bool rawA = digitalRead(GPIO_NUM_34);
  bool rawB = digitalRead(GPIO_NUM_35);

  keyA.update(rawA);
  keyB.update(rawB);

  if (keyA.keyPressed()) Serial.println("A down");
  if (keyA.keyRepeated()) Serial.println("A repeat");
  if (keyA.keyReleased()) Serial.println("A up");

  if (keyB.keyPressed()) Serial.println("B down");
  if (keyB.keyRepeated()) Serial.println("B repeat");
  if (keyB.keyReleased()) Serial.println("B up");

  if (keyA.isDown() && keyB.isDown()) {
    Serial.println("A + B combo");
  }
}