// Define pin connections
const int redPin = 10;    // Pin for Red LED
const int greenPin = 9;  // Pin for Green LED
const int bluePin = 6;   // Pin for Blue LED
const int buttonPin = 12; // Pin for the button

// Variables for button state and LED colors
int buttonState = 0;        // Current state of the button
int lastButtonState = 0;    // Previous state of the button
unsigned long lastDebounceTime = 0; // Last time the output pin was toggled
unsigned long debounceDelay = 50;    // Debounce time in milliseconds

// RGB color variables
int redValue = 0;
int greenValue = 0;
int blueValue = 0;

void setup() {
  // Initialize LED pins as OUTPUT
  pinMode(redPin, OUTPUT);
  pinMode(greenPin, OUTPUT);
  pinMode(bluePin, OUTPUT);
  
  // Initialize button pin as INPUT
  pinMode(buttonPin, INPUT_PULLUP); // Using internal pull-up resistor
  
  Serial.begin(9600); // Initialize serial communication
}

void loop() {
  // Read the button state
  int reading = digitalRead(buttonPin);
  
  // Check for button press
  if (reading != lastButtonState) {
    lastDebounceTime = millis(); // Reset the debounce timer
  }

  // If the button state has been stable for longer than the debounce delay
  if ((millis() - lastDebounceTime) > debounceDelay) {
    // Check if the button was pressed (LOW means pressed due to pull-up)
    if (reading == LOW) {
      // Change RGB color on button press
      changeColor();
      Serial.print("Button pressed: ");
      Serial.print("R: "); Serial.print(redValue);
      Serial.print(" G: "); Serial.print(greenValue);
      Serial.print(" B: "); Serial.println(blueValue);
    }
  }

  lastButtonState = reading; // Save the reading as the last state for next loop
}

// Function to change RGB color
void changeColor() {
  // Simple color cycling logic
  if (redValue == 0 && greenValue == 0 && blueValue == 0) {
    redValue = 255; // Red
  } else if (redValue == 255) {
    redValue = 0;
    greenValue = 255; // Green
  } else if (greenValue == 255) {
    greenValue = 0;
    blueValue = 255; // Blue
  } else if (blueValue == 255) {
    blueValue = 0;
  }
  
  // Update the LED colors
  analogWrite(redPin, redValue);
  analogWrite(greenPin, greenValue);
  analogWrite(bluePin, blueValue);
}