// https://wokwi.com/projects/361477000001335297
// https://forum.arduino.cc/t/whack-a-mole-game/1112219

// odd values. nmust be the circuit or something
// const int button_values[] = {913, 429, 267, 179, 110};
// wokwi test values

const int button_values[] = {850, 680, 510, 340, 170,};

// for the analog regions corresponding to buttons
const unsigned char inputPin[2] = {A0, A1};

const int btn_tol = 20;

unsigned long now; // everyone's time for the whole loop

void setup()
{
  Serial.begin(115200);
  xprintf("\nhello world.\n"); 
}

void loop()
{
  now = millis();
  scanButtons();
  reportButtons();
}


// stores state and time for debouncing
// and sets pressed for any buttons that get pressed.
unsigned char lastButton[2][5];
unsigned long lastButtonTime[2][5];
unsigned char pressed[2][5];

unsigned char gotPressed(unsigned char thePlayer, unsigned char theButton)
{
  return pressed[thePlayer][theButton];
}

// look at all the buttons, load the pressed array
void scanButtons()
{
  unsigned long now = millis();

  for (unsigned char player = 0; player < 2; player++) {
    int analogValue = analogRead(inputPin[player]);
    for (int ii = 0; ii < 5; ii++) {
      pressed[player][ii] = 0;    // false. not pressed - or is it? let us see:

      if (now - lastButtonTime[player][ii] < 15)  // too soon to look at this button again?
        continue;

      unsigned char button = (analogValue < button_values[ii] + btn_tol) && (analogValue > button_values[ii] - btn_tol);

      if (button != lastButton[player][ii]) {
        pressed[player][ii] = button;
        lastButton[player][ii] = button;
        lastButtonTime[player][ii] = now;
      }
    }
  }
}

// show any pressed buttons
void reportButtons()
{
  for (unsigned char player = 0; player < 2; player++) {
    for (int ii = 0; ii < 5; ii++) {
      if (gotPressed(player, ii)) {
        xprintf("player %d detect hit on button %d\n", player, ii);
      }
    }
  }
}

// programmer misses printf...
void xprintf(const char *format, ...)
{
  char buffer[256];
  va_list args;
  va_start(args, format);
  vsprintf(buffer, format, args);
  va_end(args);
  Serial.print(buffer);
}