// Countdown timer

unsigned long buttonTimeout = 4000;
unsigned long buttonCountdown = 0;
unsigned long countdown2Start;
unsigned long msTilbage;
int minTilbage;
unsigned long pressedTime;
unsigned long etMinut = 60000;
unsigned long toMinutter = 120000;
unsigned long tiSekunder = 10000;
unsigned long interval;
unsigned long passeretTid;
unsigned long restTid;
unsigned long tmptmp;

int oneShot = 0;

void setup() {
  //pinMode(RED_LED, OUTPUT);
  Serial.begin(9600);
    delay(5000);
    while(!Serial){
  }
  pressedTime = millis();
  interval = etMinut;
  passeretTid = interval;
  // 10 minutter
  // countdown2Start = pressedTime + (10 * 60 * 1000);     
  // 5 minutter  
  //countdown2Start = pressedTime + (5 * 60 * 1000);  
  countdown2Start = pressedTime + toMinutter;  
  Serial.print("countdown2Start = ");
  Serial.println(countdown2Start);   
  msTilbage = countdown2Start;
  // 1 minutter
  // countdown2Start = pressedTime + (1 * 60 * 1000);     
  //interval = tiSekunder;
  // display_Running_Sketch();

}

void loop() {
  // if (((millis() - pressedTime + interval) > passeretTid) && countdown2Start < passeretTid) {
  restTid = millis() - pressedTime + interval;
  if ((millis() - pressedTime + interval) > passeretTid) {
    minTilbage = (pressedTime - millis())/1000;
    Serial.print("millis() = ");
    Serial.println(millis());
    Serial.print("pressedTime = ");
    Serial.println(pressedTime);
    Serial.print("passeretTid = ");  
    Serial.println(passeretTid);
    Serial.print("millis() - pressedTime + interval = ");
    Serial.println(millis() - pressedTime + interval);
    Serial.print("countdown2Start - passeretTid = ");
    Serial.println(countdown2Start - passeretTid);
    //Serial.print(minTilbage);
    //Serial.println(" minutter tilbage");
    msTilbage -= etMinut;
    if ((countdown2Start - passeretTid) < etMinut) {
      interval = tiSekunder;
    }
    passeretTid += interval;
  }
// if (countdown2Start 
  /*
  if ((buttonCountdown != 0) && (millis() - buttonCountdown > buttonTimeout)) {
    Serial.println("Tiden er udløbet - nulstiller ...............");
    Serial.println();
    resetVars();
    buttonCountdown = 0;
    //shortPressCount = 0;
  }
  */
  
}

void resetVars() {
  oneShot = 0;
  delay(5000);
}