// 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 etSekund = 1000;
unsigned long interval;
unsigned long passeretTid;
unsigned long restTid;
unsigned long tmptmp;
unsigned long ligeNu;

int oneShot = 0;

void setup() {
  //pinMode(RED_LED, OUTPUT);
  Serial.begin(9600);
    delay(5000);
    while(!Serial){
  }
  pressedTime = millis();
  delay(234);
  //interval = etMinut;
  interval = 0;
  // passeretTid = interval;
  // 10 minutter
  // countdown2Start = pressedTime + (10 * 60 * 1000);     
  // 5 minutter  
  //countdown2Start = pressedTime + (5 * 60 * 1000);  
  //countdown2Start = pressedTime + toMinutter;  
  countdown2Start = toMinutter;
  Serial.print("countdown2Start = ");
  Serial.println(countdown2Start/1000);   
  msTilbage = countdown2Start;
  // 1 minutter
  // countdown2Start = pressedTime + (1 * 60 * 1000);     
  //interval = tiSekunder;
  // display_Running_Sketch();

}

void loop() {
  // if (((millis() - pressedTime + interval) > passeretTid) && countdown2Start < passeretTid) {
  //restTid = countdown2Start - millis();
  //if ((millis() - pressedTime + interval) > passeretTid) {
    //minTilbage = (pressedTime - millis())/1000;
  ligeNu = millis();
  if(ligeNu > (pressedTime + interval) && (ligeNu < (pressedTime + countdown2Start))) {
    Serial.print("millis() = ");
    Serial.println(ligeNu);
    Serial.print("pressedTime = ");
    Serial.println(pressedTime);
    passeretTid = ligeNu - pressedTime;
    Serial.print("passeretTid = ");  
    Serial.println(passeretTid/1000);
    //Serial.print("millis() - pressedTime + interval = ");
    //Serial.println(millis() - pressedTime + interval);
    restTid = countdown2Start - passeretTid;
    Serial.print("restTid: countdown2Start - passeretTid = ");
    Serial.println(restTid/1000);
    //Serial.println(countdown2Start - passeretTid);
    //Serial.print(minTilbage);
    //Serial.println(" minutter tilbage");
    //msTilbage -= etMinut;
    // if ((countdown2Start - passeretTid) < etMinut) {
    //  interval = tiSekunder;
    // }
    // passeretTid += interval;
    // if (interval == 0) {
    //  interval = etMinut;
    // }
    if (restTid < tiSekunder) {
      interval += etSekund;
    } else if (restTid < etMinut) {
      interval += tiSekunder;
    } else {
      interval += etMinut;
    }
  }
  // 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);
}