#include <Adafruit_NeoPixel.h>

#define PIXEL_PIN   6        // NeoPixel data pin
#define NUM_PIXELS  64       // Change to match your ring/leds in the strip
#define AUDIO_PIN     A0       // Slide pot input

Adafruit_NeoPixel ring(NUM_PIXELS, PIXEL_PIN, NEO_GRB + NEO_KHZ800);

// ----- Adjustable Thresholds -----
float orangeStart = 0.1;  
float redStart    = 0.5; 

void setup() {
  ring.begin();
  ring.show();
}

void loop() {

  // ---- Smoothed Audio Read ----
  static float smoothed = 0;
  int raw = analogRead(AUDIO_PIN);

  smoothed = (smoothed * 0.8) + (raw * 0.2);
  int level = smoothed;

  int ledsToLight = map(level, 0, 1023, 0, NUM_PIXELS);

  for (int i = 0; i < NUM_PIXELS; i++) {

    if (i < ledsToLight) {

      float progress = (float)i / (NUM_PIXELS - 1);
      uint32_t color = getLevelColor(progress);

      ring.setPixelColor(i, color);

    } else {
      ring.setPixelColor(i, 0);
    }
  }

  ring.show();
}


// ----- Colour Function With Adjustable Thresholds -----

uint32_t getLevelColor(float progress) {

  uint8_t r = 0, g = 0, b = 0;

  if (progress < orangeStart) {

    // ----- Green -----
    r = 0;
    g = 255;

  }
  else if (progress < redStart) {

    // ----- Green → Orange Blend -----
    float p = (progress - orangeStart) / (redStart - orangeStart);

    r = 255 * p;
    g = 255;

  }
  else {

    // ----- Orange → Red Blend -----
    float p = (progress - redStart) / (1.0 - redStart);

    r = 255;
    g = 255 * (1.0 - p);

  }

  return ring.Color(r, g, b);
}