const int BUTTON_PIN = 2;
const int LED_PIN = 21;
const unsigned long DEBOUNCE_DELAY = 50;  // Debounce time in milliseconds

unsigned long lastDebounceTime = 0;  // Variable to store the last time the button was pressed
int buttonState = HIGH;  // Current state of the button (HIGH by default)
int lastButtonState = HIGH;  // Previous state of the button (HIGH by default)

void setup() {
  Serial.begin(115200);
  Serial.println("Hello, ESP32!");

  pinMode(LED_PIN, OUTPUT);
  pinMode(BUTTON_PIN, INPUT);
}

void loop() {
  int reading = digitalRead(BUTTON_PIN);  // Read the state of the button

  // if (buttonState == LOW) Serial.println(buttonState);

  // Check if the button state has changed
  if (reading != lastButtonState) {
    lastDebounceTime = millis();  // Reset the debounce timer
  }

  // Check if the debounce delay has passed
  if ((millis() - lastDebounceTime) > DEBOUNCE_DELAY) {
    // If the button state has changed and remained stable for the debounce delay
    if (reading != buttonState) {
      buttonState = reading;  // Update the button state
      // If the button is pressed (LOW), toggle the LED state
      if (buttonState == LOW) {
        digitalWrite(LED_PIN, !digitalRead(LED_PIN));  // Toggle the LED
      }
      Serial.print("Button State: ");
      Serial.println(buttonState == LOW ? "Pressed" : "Released");
    }
  }

  lastButtonState = reading;  // Save the current button state for comparison in the next iteration
}