const int clkPin = 2;    // Pin connected to CLK on the rotary encoder
const int dtPin = 3;     // Pin connected to DT on the rotary encoder
const int swPin = 4;     // Pin connected to SW on the rotary encoder

const int ledPins[] = {5, 6, 7, 8, 9, 10, 11, 12, 13, A0}; // Pins connected to the LEDs
int ledCount = 10;
int level = 0;

int lastStateCLK;
int currentStateCLK;
int lastButtonState;

void setup() {
  // Initialize LED pins as output
  for (int i = 0; i < ledCount; i++) {
    pinMode(ledPins[i], OUTPUT);
    digitalWrite(ledPins[i], LOW); // Turn off all LEDs initially
  }

  // Initialize rotary encoder pins
  pinMode(clkPin, INPUT);
  pinMode(dtPin, INPUT);
  pinMode(swPin, INPUT_PULLUP);

  // Read the initial state of the CLK pin
  lastStateCLK = digitalRead(clkPin);
  lastButtonState = digitalRead(swPin);
}

void loop() {
  // Read the current state of the CLK pin
  currentStateCLK = digitalRead(clkPin);

  // If the state has changed, then the encoder has been rotated
  if (currentStateCLK != lastStateCLK) {
    // Read the DT pin
    int dtState = digitalRead(dtPin);

    // Determine the direction of rotation
    if (dtState != currentStateCLK) {
      // Turning clockwise
      level++;
      if (level > ledCount) level = ledCount;
    } else {
      // Turning counterclockwise
      level--;
      if (level < 0) level = 0;
    }

    // Update the LED bar graph
    for (int i = 0; i < ledCount; i++) {
      if (i < level) {
        digitalWrite(ledPins[i], HIGH);
      } else {
        digitalWrite(ledPins[i], LOW);
      }
    }
  }

  // Read the button state
  int currentButtonState = digitalRead(swPin);

  // If the button is pressed, reset the LED bar graph
  if (currentButtonState == LOW && lastButtonState == HIGH) {
    delay(50); // Debounce delay
    level = 0;
    for (int i = 0; i < ledCount; i++) {
      digitalWrite(ledPins[i], LOW);
    }
  }

  // Update the last states
  lastStateCLK = currentStateCLK;
  lastButtonState = currentButtonState;
}