// ===== PIN A4988 =====
#define STEP_PIN 25
#define DIR_PIN  26
#define EN_PIN   27   // aktif LOW

// ===== PIN TOMBOL (6) =====
int btnPins[6] = {12, 13, 14, 15, 16, 17};

// ===== TARGET POSISI (ANALOGI JAM) =====
long targets[6] = {
  0,    // Jam 12 (0°)
  33,   // Jam 2  (60°)
  67,   // Jam 4  (120°)
  100,  // Jam 6  (180°)
  133,  // Jam 8  (240°)
  167   // Jam 10 (300°)
};

// ===== STATUS POSISI =====
long currentPosition = 0;
long targetPosition  = 0;

bool lastBtnState[6] = {HIGH, HIGH, HIGH, HIGH, HIGH, HIGH};

const int stepDelay = 600; // µs

void setup() {
  Serial.begin(115200);

  pinMode(STEP_PIN, OUTPUT);
  pinMode(DIR_PIN, OUTPUT);
  pinMode(EN_PIN, OUTPUT);

  for (int i = 0; i < 6; i++) {
    pinMode(btnPins[i], INPUT_PULLUP);
  }

  digitalWrite(EN_PIN, LOW); // enable A4988
  Serial.println("READY - 6 BUTTON CLOCK MODE");
}

void loop() {
  readButtons();
  moveStepper();
}

// ===== DETEKSI TEKAN TOMBOL (EDGE) =====
void readButtons() {
  for (int i = 0; i < 6; i++) {
    bool state = digitalRead(btnPins[i]);

    // HIGH → LOW = tombol ditekan
    if (lastBtnState[i] == HIGH && state == LOW) {
      targetPosition = targets[i];
      Serial.print("BTN ");
      Serial.print(i + 1);
      Serial.print(" | Target step: ");
      Serial.println(targetPosition);
    }

    lastBtnState[i] = state;
  }
}

// ===== GERAK STEPPER =====
void moveStepper() {
  if (currentPosition == targetPosition) return;

  if (currentPosition < targetPosition) {
    digitalWrite(DIR_PIN, HIGH);   // CW
    stepOnce();
    currentPosition++;
  } else {
    digitalWrite(DIR_PIN, LOW);    // CCW
    stepOnce();
    currentPosition--;
  }
}

// ===== SATU STEP =====
void stepOnce() {
  digitalWrite(STEP_PIN, HIGH);
  delayMicroseconds(stepDelay);
  digitalWrite(STEP_PIN, LOW);
  delayMicroseconds(stepDelay);
}