#include <Adafruit_NeoPixel.h>

#define LDR_PIN      A0
#define NEO_PIN      6
#define NUM_PIXELS   16

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

void setup() {
  Serial.begin(9600);
  pinMode(LDR_PIN, INPUT);
  
  ring.begin();
  ring.setBrightness(150); // Scale down brightness slightly for clean simulation
  ring.show();            // Initialize all pixels to 'off'
}

void loop() {
  // Read ambient light levels (Wokwi LDR outputs 0-1023)
  int lightValue = analogRead(LDR_PIN);
  Serial.print("Ambient Light Raw: ");
  Serial.println(lightValue);

  // Map the lighting into an intensity scale
  // Darker environment = higher neon illumination intensity
  int intensity = map(lightValue, 0, 1023, 255, 0);
  intensity = constrain(intensity, 0, 255);

  // Generate a smooth neon gradient shift based on brightness level
  // Brighter room = Cyan (0, 255, 255) | Pitch dark = Cyber Magenta (255, 0, 150)
  uint8_t r = map(intensity, 0, 255, 0, 255);
  uint8_t g = map(intensity, 0, 255, 255, 0);
  uint8_t b = map(intensity, 0, 255, 255, 150);

  // Apply colors across all pixels smoothly
  for (int i = 0; i < NUM_PIXELS; i++) {
    ring.setPixelColor(i, ring.Color(r, g, b));
  }
  
  ring.show();
  delay(100); // 10Hz refresh rate for fluid color transitions
}