/*
Author: Gregor Mausser
Titel: Lastenaufzug 
Date: 13.05.2026
*/

//Variablen
const int LedPinUnten = 7;
const int LedPinMitte = 6;
const int LedPinOben = 5;
const int ButtonUp = 4;
const int ButtonDown = 3;

enum mode {
  UNTEN,
  MITTE,
  OBEN
};

mode state = UNTEN;


void setup() {
  // put your setup code here, to run once:
  pinMode(LedPinUnten, OUTPUT);
  pinMode(LedPinMitte, OUTPUT);
  pinMode(LedPinOben, OUTPUT);
  pinMode(ButtonUp, INPUT_PULLUP);
  pinMode(ButtonDown, INPUT_PULLUP);
  Serial.begin(9600);
}

void Led_settings(int Oben, int Mitte, int Unten) {
  
  if(Oben == 1) {
    digitalWrite(LedPinOben, HIGH);
  }
  else{
  digitalWrite(LedPinOben, LOW);
  }

  if(Mitte == 1) {
    digitalWrite(LedPinMitte, HIGH);
  }
  else{
    digitalWrite(LedPinMitte, LOW);
  }
  
  if(Unten == 1) {
    digitalWrite(LedPinUnten, HIGH);
  }
  else{
  digitalWrite(LedPinUnten, LOW);
  }
}




void loop() {
  // put your main code here, to run repeatedly:

  switch(state) {
    case UNTEN:
      Led_settings(0, 0, 1);
      if (ButtonUp == LOW) {
        Led_settings(0, 0, 0);
        delay(1000);
        state = MITTE;
      }
      break;
    
    case MITTE:
      Led_settings(0, 1, 0);
      if (ButtonUp == LOW) {
        Led_settings(0, 0, 0);
        delay(1000);
        state = OBEN;
      }
      
      if (ButtonDown == LOW) {
        Led_settings(0, 0, 0);
        delay(1000);
        state = UNTEN;
      }

      break;


    case OBEN:
      Led_settings(1, 0, 0);
      if (ButtonDown == LOW) {
        Led_settings(0, 0, 0);
        delay(1000);
        state = UNTEN;
      }

      break;


  }

}