// coded by Markus Scheurer, last edited 2023-11-21

// definitions for lights and button
#define car_red 10
#define car_orange 9
#define car_green 8
#define pushbutton 13
#define pedestrian_red 7
#define pedestrian_green 6

// bool status
bool condition1 = 1 ; // 0 = low / false, 1 = high / true; https://docs.wokwi.com/parts/wokwi-pushbutton/#:~:text=The%20digital%20pin%20will%20read
bool condition2 = 1 ;
bool condition3 = 1 ;
bool condition4 = 1 ;
bool condition5 = 1 ;

// definitions for lopps
#define extra_short_loop 1000
#define short_loop 2000
#define long_loop 5000

// configuration for traffic lights and push button

void setup() {
  // car traffic lights
  pinMode(car_red, OUTPUT);
  pinMode(car_orange, OUTPUT);
  pinMode(car_green, OUTPUT);

  // pedestrian traffic lights
  pinMode(pedestrian_red, OUTPUT);
  pinMode(pedestrian_green, OUTPUT);

  // condition push button
  pinMode(pushbutton, INPUT_PULLUP); //INPUT_PULLUP = activate electric resistance
  // hier lag der Fehler, da zuerst pinMode(condition1, INPUT_PULLUP) stand und damit der Button nicht angesprochen wurde
  // Turn on the traffic light in check mode 
  digitalWrite(car_red, HIGH);
  digitalWrite(pedestrian_red, HIGH);
  delay(short_loop);
  digitalWrite(car_orange, HIGH);
  delay(short_loop);

  // initial situation
  digitalWrite(car_green, HIGH);
  digitalWrite(car_red, LOW);
  digitalWrite(car_orange, LOW);
  digitalWrite(pedestrian_red, HIGH);
  digitalWrite(pedestrian_green, LOW);
  condition1 = digitalRead(pushbutton);
  delay(short_loop);

}

void loop() {
  
  // regular traffic switch car_green -> car_orange -> car_red -> car_orange + car_red -> back to car_green
  
  digitalWrite(car_green, LOW);
  digitalWrite(car_orange, HIGH);
  condition2 = digitalRead(pushbutton);
  delay(short_loop);
  digitalWrite(car_orange, LOW);
  digitalWrite(car_red, HIGH);
  condition3 = digitalRead(pushbutton);
  delay(long_loop);
  digitalWrite(car_orange, HIGH);
  condition4 = digitalRead(pushbutton);
  delay(extra_short_loop);
  digitalWrite(car_red, LOW);
  digitalWrite(car_orange, LOW);
  digitalWrite(car_green, HIGH);
  condition5 = digitalRead(pushbutton);
  delay(long_loop);

  // pullup resistance activated, low = button is pushed
  // do this when button is pushed
  if (condition1 == LOW||condition2 == LOW||condition3 == LOW||condition4 == LOW||condition5 == LOW){
          
    // change car traffic light from green to orange
    digitalWrite(car_green, LOW);
    digitalWrite(car_orange, HIGH);
    delay(short_loop);

    // after 2 seconds change car traffic light from orange to red
    digitalWrite(car_orange, LOW);
    digitalWrite(car_red, HIGH);
    delay(extra_short_loop);

    // after 1 second change pedestrian traffic light from red to green, pedestrians have 5 seconds to walk
    digitalWrite(pedestrian_red, LOW);
    digitalWrite(pedestrian_green, HIGH);
    delay(long_loop);

    // after 5 second change pedestrian traffic light back to red
    digitalWrite(pedestrian_red, HIGH);
    digitalWrite(pedestrian_green, LOW);
    delay(extra_short_loop);

    // after 1 second change car traffic light, activate orange plus red
    digitalWrite(car_orange, HIGH);
    delay(short_loop);
   
    // after 2 second change car traffic light back to green
    digitalWrite(car_red, LOW);
    digitalWrite(car_orange, LOW);
    digitalWrite(car_green, HIGH);
    delay(long_loop);
  }

  else {
  // turn off pedestrian green light
  digitalWrite(pedestrian_green, LOW);
 }
}