#define LED_PIN 13
#define BUTTON_PIN 2

// Definisikan status-status untuk state machine
enum State {
  WAITING_PRESS,
  WAITING_RELEASE,
  DOT,
  DASH
};

State currentState = WAITING_PRESS;
unsigned long lastPressedTime = 0;
char morseSymbol = ' ';

void setup() {
  pinMode(LED_PIN, OUTPUT);
  pinMode(BUTTON_PIN, INPUT_PULLUP);
  Serial.begin(9600);
}

void loop() {
  int buttonState = digitalRead(BUTTON_PIN);
  unsigned long currentTime = millis();

  switch(currentState) {
    case WAITING_PRESS:
      if (buttonState == LOW && currentTime - lastPressedTime > 50) {
        lastPressedTime = currentTime;
        currentState = WAITING_RELEASE;
      }
      break;

    case WAITING_RELEASE:
      if (buttonState == HIGH && currentTime - lastPressedTime > 50) {
        unsigned long pressDuration = currentTime - lastPressedTime;
        if (pressDuration < 500) {
          morseSymbol = '.';
          currentState = DOT;
        } else {
          morseSymbol = '-';
          currentState = DASH;
        }
        lastPressedTime = currentTime;
      }
      break;

    case DOT:
      if (currentTime - lastPressedTime > 100) {
        digitalWrite(LED_PIN, LOW);
        lastPressedTime = currentTime;
        currentState = WAITING_PRESS;
        Serial.print(morseSymbol);
      } else if (currentTime - lastPressedTime > 50) {
        digitalWrite(LED_PIN, HIGH);
      }
      break;

    case DASH:
      if (currentTime - lastPressedTime > 500) {
        digitalWrite(LED_PIN, LOW);
        lastPressedTime = currentTime;
        currentState = WAITING_PRESS;
        Serial.print(morseSymbol);
      } else if (currentTime - lastPressedTime > 50) {
        digitalWrite(LED_PIN, HIGH);
      }
      break;
  }
}