// Pin setup
const int joyX = A0;
const int joyY = A1;
const int joyBtn = 2;

const int redPin = 9;
const int greenPin = 10;
const int bluePin = 11;

// Colors: [R, G, B]
byte colors[][3] = {
  {255, 0, 0},    // Red
  {0, 255, 0},    // Green
  {0, 0, 255},    // Blue
  {255, 255, 0},  // Yellow
  {0, 255, 255},  // Cyan
  {255, 0, 255},  // Magenta
  {255, 255, 255} // White
};

int colorIndex = 0;
bool ledOn = true;

void setup() {
  pinMode(joyBtn, INPUT_PULLUP);
  pinMode(redPin, OUTPUT);
  pinMode(greenPin, OUTPUT);
  pinMode(bluePin, OUTPUT);
  applyColor(255);  // full brightness at start
}

void loop() {
  int x = analogRead(joyX);
  int y = analogRead(joyY);
  static bool buttonPressed = false;

  // Convert Y-axis to brightness (joystick up = 0, down = 1023)
  int brightness = map(y, 1023, 0, 0, 255);  // inverted so up = bright

  // Change color (Left/Right)
  if (x < 300) {
    colorIndex = (colorIndex - 1 + 7) % 7;
    delay(200);
  } else if (x > 700) {
    colorIndex = (colorIndex + 1) % 7;
    delay(200);
  }

  // Toggle LED On/Off with button press
  if (digitalRead(joyBtn) == LOW) {
    if (!buttonPressed) {
      ledOn = !ledOn;
      delay(200); // debounce
      buttonPressed = true;
    }
  } else {
    buttonPressed = false;
  }

  if (ledOn) {
    applyColor(brightness);
  } else {
    applyColor(0);
  }

  delay(50);  // small delay for smoother behavior
}

// Apply current color and brightness
void applyColor(int brightness) {
  analogWrite(redPin, (colors[colorIndex][0] * brightness) / 255);
  analogWrite(greenPin, (colors[colorIndex][1] * brightness) / 255);
  analogWrite(bluePin, (colors[colorIndex][2] * brightness) / 255);
}