// DEKLARATIONEN
// Wie lange gewartet wird zu einer Umschaltung
int wait1 = 10;
// Phasenlänge
int duration1 = 100;
// Ampel Status
int state = -1;
// Timer 
int timer = 0;
// neue Zeit
int newState = 0;
// Pins für die Ampeln
int a1r = 2;
int a1y = 3;
int a1g = 4;
int a2r = 5;
int a2y = 6;
int a2g = 7;
int bb1 = 8;
int bb2 = 9;

int previousButtonState1 = HIGH;
int previousButtonState2 = HIGH;

void setState(int newState);


void setup() {
  // Pin-Modi einstellen
  pinMode(a1r, OUTPUT);
  pinMode(a1y, OUTPUT);
  pinMode(a1g, OUTPUT);
  pinMode(a2r, OUTPUT);
  pinMode(a2y, OUTPUT);
  pinMode(a2g, OUTPUT);
  pinMode(bb1, INPUT_PULLUP);
  pinMode(bb2, INPUT_PULLUP);

  // Startzustand: beide Ampeln auf Rot
  state = 0;
  delay(wait1*1000);

}

void loop() {
  setState(newState);
  timer += 20;
  if (timer > duration1){
    newState = state + 1;
  } else if (newState == 8){
    newState = 0;
  }
  timer = 0;
  setState(newState);
  if (bb1 == LOW){
    state = 0;
    timer = 0;
  }
  if (bb2 == LOW){
    state = 0;
    timer = 0;
  };
}

void setState(int newState) {
  if (state != newState) {
    if (newState == 0) {
      setLights(0);
    } else if (newState == 1) {
      setLights(1);
    } else if (newState == 2) {
      setLights(2);
    } else if (newState == 3) {
      setLights(3);
    } else if (newState == 4) {
      setLights(4);
    } else if (newState == 5) {
      setLights(5);
    } else if (newState == 6) {
      setLights(6);
    } else if (newState == 7) {
      setLights(7);
    } else if (newState == 8) {
      setLights(8);
    }
    state = newState;
  }
}


// Funktion zur Steuerung der Ampeln
void setLights(int state) {
  // Alle Ampeln ausschalten
  digitalWrite(a1r, LOW);
  digitalWrite(a1y, LOW);
  digitalWrite(a1g, LOW);
  digitalWrite(a2r, LOW);
  digitalWrite(a2y, LOW);
  digitalWrite(a2g, LOW);

  switch(state) {
  case 0:
    // Zustand 0 - a1r, a2r
    digitalWrite(a1r, HIGH);
    digitalWrite(a1y, LOW);
    digitalWrite(a2r, HIGH);
    break;
  case 1:
    // Zustand 1 - a1r, a1y, a2r
    digitalWrite(a1r, HIGH);
    digitalWrite(a1y, HIGH);
    digitalWrite(a2r, HIGH);
    break;
  case 2: 
    // Zustand 2 - a1g, a2r
    digitalWrite(a1r, LOW);
    digitalWrite(a1y, LOW); 
    digitalWrite(a1g, HIGH); 
    digitalWrite(a2r, HIGH); 
    break;
  case 3:  
    // Zustand 3 - a1y, a2r
    digitalWrite(a1g, LOW);
    digitalWrite(a1y, HIGH);
    digitalWrite(a2r, HIGH);
    break;
  case 4:
    // Zustand 0 - a1r, a2r
    digitalWrite(a1r, HIGH);
    digitalWrite(a1y, LOW);
    digitalWrite(a2r, HIGH);
    break;
  case 5:
      // Zustand 4 - a1r, a2r, a2y
    digitalWrite(a1r, HIGH);
    digitalWrite(a2r, HIGH);
    digitalWrite(a2y, HIGH);
    break;
  case 6:
      // Zustand 5 - a1r, a2g
    digitalWrite(a2y, LOW);
    digitalWrite(a2r, LOW); 
    digitalWrite(a2g, HIGH); 
    digitalWrite(a1r, HIGH); 
    break;
  case 7:
      // Zustand 6 - a1r, a2y
    digitalWrite(a1r, HIGH);
    digitalWrite(a2g, LOW); 
    digitalWrite(a2r, LOW);
    digitalWrite(a2y, HIGH);
    break;
  case 8:
    // Zustand 0 - a1r, a2r
    digitalWrite(a1r, HIGH);
    digitalWrite(a1y, LOW);
    digitalWrite(a2r, HIGH);
    break;
  }
}