#include <Adafruit_NeoPixel.h>

#define LED_PIN    6    // Pin connected to the NeoPixels
#define LED_COUNT  60   // Number of NeoPixels in the ring

Adafruit_NeoPixel strip(LED_COUNT, LED_PIN, NEO_GRB + NEO_KHZ800);

unsigned long startTime;   // Start time of the animation
//unsigned long duration = 3600000;  // Duration of the animation in milliseconds
unsigned long duration = 1000;  // Duration of the animation in milliseconds


unsigned long animationStartTime;   // Start time of the animation
unsigned long animationDuration = 5000;  // Duration of the animation in milliseconds





void setup() {
  strip.begin();
  strip.show();  // Initialize all pixels to 'off'
  //delay(500);    // Delay for visual effect
  startTime = millis();  // Record the start time
  animationStartTime = millis();  // Record the start time
}

void loop() {
  unsigned long currentTime = millis();
  unsigned long elapsedTime = currentTime - startTime;

  if (elapsedTime <= duration) {
    // Calculate the percentage of completion
    float percentage = (float)elapsedTime / duration;

    // Calculate the number of LEDs to light up
    int numLeds = (int)(percentage * LED_COUNT);

    // Turn on the LEDs up to 'numLeds'
    for (int i = 0; i < numLeds; i++) {
      strip.setPixelColor(i, strip.Color(0, 0, 255));  // Set color to white (full brightness)
    }

    strip.show();  // Update the strip with the new colors
  } else {
    performAnimation(); // Rainbow Animation after the ring fills up
  }
}


void performAnimation() {
  unsigned long currentTime = millis();
  unsigned long elapsedTime = currentTime - animationStartTime;

  // Calculate the percentage of completion
  float percentage = (float)elapsedTime / animationDuration;
  float fadePercentage = 20;  // Fade speed for the black to color transition

  // Calculate the number of LEDs to light up
  int numLeds = (int)(percentage * LED_COUNT);

  // Set the color of each LED based on its position in the rainbow
  for (int i = 0; i < LED_COUNT; i++) {
    int hue = (int)(currentTime / 10 + i * 256 / LED_COUNT) % 256;
    int fadeValue = (int)(255 * (percentage - fadePercentage));
    if (fadeValue < 0) fadeValue = 0;

    if (i < numLeds) {
      strip.setPixelColor(i, strip.gamma32(strip.ColorHSV(hue * 65536L / 256)));
    } else {
      strip.setPixelColor(i, strip.gamma32(strip.Color(0, 0, 0, fadeValue)));
    }
  }

  strip.show();  // Update the strip with the new colors

  if (elapsedTime >= animationDuration) {
    // Reset animation and continue
    animationStartTime = currentTime;
  }
}