#include <utils.h>

#define ledPin 13
#define btnPin 12

int count;
volatile bool btnState;
volatile unsigned long lastPressed;

int ledDelays[3] = {1000,500,200};

void setup() {
  // initialize pins, variables, interrupts and serial
  pinMode(btnPin, INPUT_PULLUP);
  pinMode(ledPin, OUTPUT);

  count = 0;
  btnState = false;
  lastPressed = 0;

  attachInterrupt(digitalPinToInterrupt(btnPin), btnPressHandler, FALLING);
  Serial.begin(9600);
}

void btnPressHandler() {
  unsigned long now = micros();
  if(now - lastPressed >= 100000) {
    btnState = true;
    lastPressed = micros();
  }
}

void loop() {
  if(btnState) {
    count++;
    btnState = false;

    Serial.print("Blink Duration: ");
    Serial.println(ledDelays[count%3]);
  }

  int delayTime = ledDelays[count%3];
  delay(delayTime);
  digitalWrite(ledPin, HIGH);
  delay(delayTime);
  digitalWrite(ledPin, LOW);

  delay(10);
}