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void DoNothingForNow(){}

const int DARK_FORCE_LIGHT_PIN = 4;
const int LIGHT_FORCE_LIGHT_PIN = 5;
const int MUSIC_PIN = 10;

const int DARK_FORCE_PIN = 7;
const int LIGHT_FORCE_PIN = 8;

const int LIGHTS_TIMEOUT = 1000 * 30;

volatile int DarkForceMoney = 0;
volatile int LightForceMoney = 0;
volatile int CurrentSidePin = 0;
volatile unsigned long LastActivityTime = 0;

boolean VaderJustPressed()
{
  return (digitalRead(DARK_FORCE_PIN) == HIGH);
}

boolean YodaJustPressed()
{
  return (digitalRead(LIGHT_FORCE_PIN) == HIGH);
}

void PlayVaderSound()
{
  //TODO: Implement
}

void PlayYodaSound()
{
  //TODO: Implement
}

void MakeDarkCurrentSide()
{
  CurrentSidePin = DARK_FORCE_LIGHT_PIN;
  LightTheLight();
  PlayVaderSound();
}

void MakeLightCurrentSide()
{
  CurrentSidePin = LIGHT_FORCE_LIGHT_PIN;
  LightTheLight();
  PlayYodaSound();
}

void ShutDownLights()
{
  CurrentSidePin = 0;
  LightTheLight();
}

void ResetTimer()
{
  LastActivityTime = millis();
}

boolean TimeExceeded()
{
  if ( (unsigned long)(millis() - LastActivityTime) >= LIGHTS_TIMEOUT)
    return true;

  return false;
}

void LightTheLight()
{
  digitalWrite(LIGHT_FORCE_LIGHT_PIN, LOW);
  digitalWrite(DARK_FORCE_LIGHT_PIN, LOW);

  digitalWrite(CurrentSidePin, HIGH);
}

void InsertCoin()
{
  if(CurrentSidePin == LIGHT_FORCE_LIGHT_PIN)
  {
    LightForceMoney = LightForceMoney + 1;
  }
  else if(CurrentSidePin == DARK_FORCE_LIGHT_PIN)
  {
    DarkForceMoney = DarkForceMoney + 1;
  }
  else
  {
    DoNothingForNow();
    //Play "NOOO"
  }
  Serial.print("Dark side money: ");
  Serial.println(DarkForceMoney);
  Serial.print("Light side money: ");
  Serial.println(LightForceMoney);
}

void setup()
{
  Serial.begin(9600);
  pinMode(DARK_FORCE_LIGHT_PIN, OUTPUT);
  pinMode(LIGHT_FORCE_LIGHT_PIN, OUTPUT);
  pinMode(MUSIC_PIN, OUTPUT);

  pinMode(DARK_FORCE_PIN, INPUT);
  pinMode(LIGHT_FORCE_PIN, INPUT);

  attachInterrupt(0, InsertCoin, RISING);
}

void loop()
{
  //Experimental Area

  if(VaderJustPressed())
  {
    MakeDarkCurrentSide();
    ResetTimer();
  }
  else if(YodaJustPressed())
  {
    MakeLightCurrentSide();
    ResetTimer();
  }
  if(TimeExceeded())
  {
    ShutDownLights();
  }
  //End of Experimental Area
}