#include <Adafruit_NeoPixel.h>

#define NUMPIXELS 17  // Number of LEDs in each ring
#define PIN1 2        // First ring
#define PIN2 3        // Second ring
#define BUTTON_PIN 4  // Button pin

Adafruit_NeoPixel strip1 = Adafruit_NeoPixel(NUMPIXELS, PIN1, NEO_GRB + NEO_KHZ800);
Adafruit_NeoPixel strip2 = Adafruit_NeoPixel(NUMPIXELS, PIN2, NEO_GRB + NEO_KHZ800);

bool ledsOn = false;
unsigned long lastDebounceTime = 0;
unsigned long debounceDelay = 300;

void setup() {
  strip1.begin();
  strip2.begin();
  strip1.show();  // Initialize all pixels to 'off'
  strip2.show();
  pinMode(BUTTON_PIN, INPUT_PULLUP);
}

void loop() {
  // Check button press with debounce
  if (digitalRead(BUTTON_PIN) == LOW && (millis() - lastDebounceTime) > debounceDelay) {
    lastDebounceTime = millis();
    if (!ledsOn) {
      ledsOn = true;
      accelerateSinglePixel();
      startBreathing();  // Transition to breathing effect after acceleration
    } else {
      ledsOn = false;
      fadeOff();  // Turn off the lights
    }
  }
}

// Accelerating single pixel running around the ring
void accelerateSinglePixel() {
  int delayTime = 100;  // Start with a delay time of 100ms
  int accelerationFactor = 2;  // Speed up factor for each loop

  for (int speed = 0; speed < 10; speed++) {  // Loop to increase the speed of the pixel
    for (int i = 0; i < NUMPIXELS; i++) {
      uint32_t color1 = colorWheel((i * 256 / NUMPIXELS) & 255);  // Rainbow color for ring 1
      uint32_t color2 = colorWheel((i * 256 / NUMPIXELS + 128) & 255);  // Rainbow color for ring 2
      
      strip1.clear();  // Clear previous pixels
      strip2.clear();
      
      strip1.setPixelColor(i, color1);  // Light up one pixel on ring 1
      strip2.setPixelColor(i, color2);  // Light up one pixel on ring 2
      
      strip1.show();
      strip2.show();
      
      delay(delayTime);  // Control the speed of pixel movement
    }
    delayTime = max(10, delayTime / accelerationFactor);  // Accelerate by reducing delay
  }

  // After acceleration, light up all the pixels (full rainbow effect)
  for (int i = 0; i < NUMPIXELS; i++) {
    strip1.setPixelColor(i, colorWheel((i * 256 / NUMPIXELS) & 255));  // Full rainbow color
    strip2.setPixelColor(i, colorWheel((i * 256 / NUMPIXELS + 128) & 255));  // Full rainbow color
  }
  strip1.show();
  strip2.show();
}

// Smooth breathing effect with brightness fading in and out
void startBreathing() {
  int brightness = 0;
  int fadeAmount = 5;

  while (ledsOn) {
    for (int j = 0; j < 510; j++) {  // Adjust for smooth fade-in and fade-out

      // Increase brightness until maximum, then decrease
      if (j < 255) {
        brightness = j;  // Fade in
      } else {
        brightness = 510 - j;  // Fade out
      }

      // Set the adjusted brightness for each pixel
      for (int i = 0; i < NUMPIXELS; i++) {
        uint32_t color1 = colorWheel((i * 256 / NUMPIXELS) & 255);  // Rainbow color for ring 1
        uint32_t color2 = colorWheel((i * 256 / NUMPIXELS + 128) & 255);  // Rainbow color for ring 2
        
        strip1.setPixelColor(i, adjustBrightness(color1, brightness));
        strip2.setPixelColor(i, adjustBrightness(color2, brightness));
      }

      strip1.show();
      strip2.show();

      delay(10);  // Control breathing speed
    }
  }
}

// Adjusts brightness of the color
uint32_t adjustBrightness(uint32_t color, uint8_t brightness) {
  uint8_t r = (color >> 16) & 0xFF;
  uint8_t g = (color >> 8) & 0xFF;
  uint8_t b = color & 0xFF;
  
  r = (r * brightness) / 255;
  g = (g * brightness) / 255;
  b = (b * brightness) / 255;
  
  return strip1.Color(r, g, b);
}

// Fades off the lights
void fadeOff() {
  for (int i = NUMPIXELS - 1; i >= 0; i--) {
    strip1.setPixelColor(i, strip1.Color(0, 0, 0));  // Turn off pixels in ring 1
    strip2.setPixelColor(i, strip2.Color(0, 0, 0));  // Turn off pixels in ring 2
    strip1.show();
    strip2.show();
    delay(10);  // Delay for fading effect
  }
}

// Generates rainbow colors for pixels
uint32_t colorWheel(byte wheelPos) {
  wheelPos = 255 - wheelPos;
  if (wheelPos < 85) {
    return strip1.Color(255 - wheelPos * 3, 0, wheelPos * 3);
  }
  if (wheelPos < 170) {
    wheelPos -= 85;
    return strip1.Color(0, wheelPos * 3, 255 - wheelPos * 3);
  }
  wheelPos -= 170;
  return strip1.Color(wheelPos * 3, 255 - wheelPos * 3, 0);
}