enum class STATUS {OFF, ON};

//
// Blink Klasse für Zeitintervalle
//
class Blink {
  private:
    STATUS _status;
    uint32_t _flashingTime;
    uint32_t _oldTime {0};

  public:
    Blink();  
    void switchBlinkOn();
    void switchBlinkOff();
    virtual void setStatus(STATUS);
    STATUS getStatus(void);
    void setFlashingTime(uint32_t);
    void tick(void);
};

Blink::Blink() : _status {STATUS::OFF} {}

void Blink::switchBlinkOn() {
  setStatus(STATUS::ON); 
}

void Blink::switchBlinkOff() {
  setStatus(STATUS::OFF); 
}

void Blink::setStatus(STATUS status) {
  _status = status;  
}

STATUS Blink::getStatus() {
  return _status;
}

void Blink::setFlashingTime(uint32_t time) {
  _flashingTime = time;
}

void Blink::tick() {
  if (millis() - _oldTime >= _flashingTime) {
    _oldTime = millis();
    if (_status == STATUS::OFF) {
      switchBlinkOn();
    } else {
      switchBlinkOff();
    }
  }
}

//
// LED Klasse für physische LEDs
// 
class Led : public Blink {
  private:
    uint8_t _pin;  
    static uint8_t _numOfLeds;
    void init(void);

  public:
    Led(void);
    Led(uint8_t);
    ~Led(void); 
    void setStatus(STATUS status); 
    static int getNumOfLeds(void);
};

uint8_t Led::_numOfLeds {0};

Led::Led(void) : Blink() {
  _pin = LED_BUILTIN;
  init();
}

Led::Led(uint8_t pin) : Blink() {
  _pin = pin;
  init();
}

Led::~Led() {
  _numOfLeds--;
}

void Led::init() {
  pinMode(_pin,OUTPUT);
  _numOfLeds++;
}

void Led::setStatus(STATUS status) {
  Blink::setStatus(status);
  switch (getStatus()) {
    case STATUS::ON: 	digitalWrite(_pin,HIGH); 
              break;
    case STATUS::OFF: digitalWrite(_pin,LOW); 
              break;
  }
}    

int Led::getNumOfLeds() {
  return _numOfLeds;
}


//
// Main Prgramm
//
Led led1;
Led led2(2);
Led led3(4);
Led led4(6);
Led led5(8);

void setup() {
  Serial.begin(115200);
  Serial.println(Led::getNumOfLeds());
  led1.setFlashingTime(250);
  led2.setFlashingTime(1000);
  led3.setFlashingTime(500);
  led4.setFlashingTime(150);
  led5.setFlashingTime(3000);
}

void loop() {
  led1.tick();
  led2.tick();
  led3.tick();
  led4.tick();
  led5.tick();
}