// Define button GPIO pins
const int buttonPins[9] = {23, 22, 21, 4, 18, 19, 25, 26, 27};

// Define rotary encoder GPIO pins
const int encoderPinCLK = 32;  // CLK pin
const int encoderPinDT = 13;   // DT pin
const int encoderButtonPin = 33; // SW pin

// Array to store the current and previous state of buttons
bool buttonStates[9];
bool lastButtonStates[9];

// Variables to store rotary encoder state
int lastEncoderCLKState = HIGH;
unsigned long lastDebounceTime = 0;
const unsigned long debounceDelay = 5; // Debounce time in milliseconds
int encoderPosition = 0;
bool lastEncoderButtonState = HIGH;

void setup() {
  // Initialize serial communication
  Serial.begin(115200);
  
  // Initialize button pins as inputs with pull-up resistors
  for (int i = 0; i < 9; i++) {
    pinMode(buttonPins[i], INPUT_PULLUP);
    buttonStates[i] = HIGH;   // Assume button not pressed (HIGH due to pull-up)
    lastButtonStates[i] = HIGH;
  }

  // Initialize rotary encoder pins
  pinMode(encoderPinCLK, INPUT_PULLUP);
  pinMode(encoderPinDT, INPUT_PULLUP);
  pinMode(encoderButtonPin, INPUT_PULLUP);
  
  // Initialize encoder state
  lastEncoderCLKState = digitalRead(encoderPinCLK);
  lastEncoderButtonState = digitalRead(encoderButtonPin);
}

void loop() {
  // Read the state of each button and detect changes
  for (int i = 0; i < 9; i++) {
    buttonStates[i] = digitalRead(buttonPins[i]);
    
    // Check if the button state has changed
    if (buttonStates[i] != lastButtonStates[i]) {
      if (buttonStates[i] == LOW) {
        Serial.print("Button ");
        Serial.print(i + 1);
        Serial.println(" Pressed");
      }
      lastButtonStates[i] = buttonStates[i];
    }
  }

  // Read the rotary encoder
  int currentEncoderCLKState = digitalRead(encoderPinCLK);
  unsigned long currentTime = millis();

  // Check if the encoder CLK pin has changed
  if (currentEncoderCLKState != lastEncoderCLKState) {
    // Debounce the signal
    if ((currentTime - lastDebounceTime) > debounceDelay) {
      if (digitalRead(encoderPinDT) != currentEncoderCLKState) {
        encoderPosition++;
        Serial.println("Rotary Encoder Turned Clockwise");
      } else {
        encoderPosition--;
        Serial.println("Rotary Encoder Turned Counterclockwise");
      }
      lastDebounceTime = currentTime;
    }
    lastEncoderCLKState = currentEncoderCLKState;
  }

  // Read the rotary encoder push button
  bool currentEncoderButtonState = digitalRead(encoderButtonPin);
  if (currentEncoderButtonState != lastEncoderButtonState) {
    if (currentEncoderButtonState == LOW) {
      Serial.println("Rotary Encoder Button Pressed");
    }
    lastEncoderButtonState = currentEncoderButtonState;
  }
  
  // Add a small delay to reduce serial output rate
  delay(50);
}