/*
  Arduino | coding-help
  reaction speed bug
  Saturday, January 17, 2026 2:03 PM

  soli

  persisting issue with the buzzer not making any noise,
  2nd white led not lighting up and the button respective to
  that led not working at all, any help?
*/

const int NUM_BTNS = 2;
const int LED_PINS[] = {11, 10, 9, 8, 6};
const int BTN_PINS[] = {12, 5};
const int BUZZ_PIN = 7;
const unsigned long LED_DELAY  = 1000;

bool ledState = false;
bool isDone = false;
int ledCount = 1;
int btnState[NUM_BTNS];
int oldBtnState[NUM_BTNS] = {1, 1};
unsigned long prevLEDTime  = 0;

int checkButtons()  {
  int btnNumber = 0;

  for (int i = 0; i < NUM_BTNS; i++) {
    // check each button
    btnState[i] = digitalRead(BTN_PINS[i]);
    if (btnState[i] != oldBtnState[i])  { // if it changed
      oldBtnState[i] = btnState[i];       // remember state for next time
      if (btnState[i] == LOW)  {          // was just pressed
        btnNumber = i + 1;
        Serial.print("Button ");
        Serial.print(btnNumber);
        Serial.println(" pressed.");
      } else {                            // was just released
        // do release stuff
      }
      delay(20);  // debounce
    }
  }
  return btnNumber;
}

void cycleColors()  {
  if (millis() - prevLEDTime >= LED_DELAY) {
    prevLEDTime = millis();
    for (int i = 1; i < 4; i++) {
      digitalWrite(LED_PINS[i], LOW);
    }
    //ledState = !ledState;
    digitalWrite(LED_PINS[ledCount], HIGH);
    //if (ledState)  tone(BUZZ_PIN, 440, 100);
    tone(BUZZ_PIN, 440, 100);
    //if (!ledState) ledCount++;
    ledCount++;
    if (ledCount > 4) {
      ledCount = 1;
      for (int i = 0; i < 5; i++) {
        digitalWrite(LED_PINS[i], LOW);
      }
      //digitalWrite(LED_PINS[0], LOW);
      //digitalWrite(LED_PINS[4], LOW);
      isDone = false;
    }
  }
}

void setup() {
  Serial.begin(115200);
  for (int i = 0; i < 5; i++) {
    pinMode(LED_PINS[i], OUTPUT);
  }
  pinMode(BTN_PINS[0], INPUT_PULLUP);
  pinMode(BTN_PINS[1], INPUT_PULLUP);
}

void loop() {
  int btnNumber = checkButtons();
  if (btnNumber == 1)  {
    digitalWrite(LED_PINS[4], HIGH);
  } else if (btnNumber == 2)  {
    digitalWrite(LED_PINS[0], HIGH);
  }
  if (btnNumber) isDone = true;
  if (isDone) cycleColors();
}

/*
    while (buttonPressed == 0) {
      digitalWrite(white1, HIGH);
      digitalWrite(white2, HIGH);
      if (digitalRead(button1) ==  0) {
        buttonPressed = 1;
        digitalWrite(white2, LOW);
      } else if (digitalRead(button2) == 0) {
        buttonPressed = 1;
        digitalWrite(white1, LOW);
      }
    }
    delay(2000);
    digitalWrite(white1, LOW);
    digitalWrite(white2, LOW);
    buttonPressed = 0;
*/