int input_pin = 2;
volatile int valume;
volatile int buttonPressCount = 0; 
volatile int lastButtonState = HIGH; 
volatile bool timer1Active = false;
volatile bool timer2Active = false;

void setupTimer1(){
    noInterrupts();

  TCCR1A =0;
  TCCR1B = 0;
  TCNT1 = 0;

  OCR1A = 31249; //0.5Hz

  TCCR1B = (1<<WGM12);

  TCCR1B |= (1<<CS12) | (1<<CS10);

  TIMSK1 |= (1<<OCIE1A);
  interrupts();
}

void setupTimer2(){
    noInterrupts();

  TCCR2A =0;
  TCCR2B = 0;
  TCNT2 = 0;

  OCR2A = 255; //1Hz

  TCCR2B = (1<<WGM22);

  TCCR2B |= (1<<CS22) | (1<<CS21) | (1<<CS20);

  TIMSK2 |= (1<<OCIE2A);
  interrupts();
}

void setupTimer3(){
  noInterrupts();

  TCCR3A =0;
  TCCR3B = 0;
  TCNT3 = 0;

  OCR3A = 7811.5; //2Hz

  TCCR3B = (1<<WGM32);

  TCCR3B |= (1<<CS32) | (1<<CS30);

  TIMSK3 |= (1<<OCIE3A);
  interrupts();
}

void setup() {
  pinMode(input_pin, INPUT);
  attachInterrupt(digitalPinToInterrupt(input_pin), state, FALLING);
  DDRC = 0xFF;

  setupTimer1();
  setupTimer2();
  setupTimer3();
  Serial.begin(9600);
}

void loop() {


}

void state(){
  static unsigned long lastDebounceTime = 0;
  unsigned long debounceDelay = 150;
    
    // Debounce
  if ((millis() - lastDebounceTime) < debounceDelay) {
      return;
  }
    
  lastDebounceTime = millis();
  buttonPressCount++;

  switch(buttonPressCount){
    case 1 :
      timer1Active = true ;
      timer2Active = false;
      TIMSK1 |= (1 << OCIE1A);
      TIMSK2 &= ~(1 << OCIE2A);
      break;
    case 2 : 
      timer1Active = false;
      timer2Active = true;
      TIMSK1 &= ~(1 << OCIE1A);
      TIMSK2 |= (1 << OCIE2A);
      break;
    case 3 :
      timer1Active = false;
      timer2Active = false;
      TIMSK1 &= ~(1 << OCIE1A);
      TIMSK2 &= ~(1 << OCIE2A);
      buttonPressCount = 0;
      PORTC = 0;
      break;
  }

  Serial.print("Button press count: ");
  Serial.println(buttonPressCount);
}

ISR(TIMER1_COMPA_vect){
  if(timer1Active){
    PORTC ^= (1<<PC0) | (1<<PC1) | (1<<PC2);
  }
}

ISR(TIMER2_COMPA_vect){
  if(timer2Active){
    PORTC ^= (1<<PC3) | (1<<PC4) | (1<<PC5) | (1<<PC6);
  }
}

ISR(TIMER3_COMPA_vect){
  PORTC ^= (1<<PC7);
}