//https://gemini.google.com/app/112f649df421ec58
#include <Adafruit_NeoPixel.h>

#define DIAL_PIN 2
#define LED_PIN  6
#define NUM_LEDS 12 
#define PULSE_TIMEOUT 700  // Time to wait to confirm digit is finished

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

int pulseCount = 0;
bool lastState = HIGH;
unsigned long lastPulseTime = 0;
bool isDialing = false;

void setup() {
  pinMode(DIAL_PIN, INPUT_PULLUP);
  strip.begin();
  strip.setBrightness(255);
  strip.show(); 
  Serial.begin(9600);
}

void loop() {
  bool currentState = digitalRead(DIAL_PIN);

  // 1. DETECTION OF THE PULSE
  if (currentState != lastState) {
    if (currentState == LOW) { // The dial circuit just broke/pulsed
      
      // TRIGGER: If this is the start of a brand new number, blank everything first
      if (!isDialing) {
        strip.clear();
        strip.show();
        pulseCount = 0; 
        isDialing = true;
        Serial.println("New number started. Clearing display...");
      }
      
      pulseCount++;
      lastPulseTime = millis();
      updateGauge(pulseCount);
    }
    delay(20); // Debounce
  }
  lastState = currentState;

  // 2. TIMEOUT: The dial has returned to the home position
  if (isDialing && (millis() - lastPulseTime) > PULSE_TIMEOUT) {
    Serial.print("Final Count for this digit: ");
    Serial.println(pulseCount);
    
    // We stop the "isDialing" state so that the NEXT pulse triggers a blank
    isDialing = false; 
  }
}

// 3. COLOR LOGIC (Changes based on how many pulses have arrived)
void updateGauge(int count) {
  uint32_t color;

  switch (count) {
    case 1:  color = strip.Color(139, 69, 19);  break; // Brown
    case 2:  color = strip.Color(255, 0, 0);    break; // Red
    case 3:  color = strip.Color(255, 120, 0);  break; // Orange
    case 4:  color = strip.Color(255, 255, 0);  break; // Yellow
    case 5:  color = strip.Color(0, 255, 0);    break; // Green
    case 6:  color = strip.Color(0, 255, 255);  break; // Cyan
    case 7:  color = strip.Color(0, 0, 255);    break; // Blue
    case 8:  color = strip.Color(128, 0, 128);  break; // Purple
    case 9:  color = strip.Color(255, 20, 147); break; // Pink
    case 10: color = strip.Color(255, 255, 255);break; // White
    default: color = strip.Color(255, 255, 255);break;
  }

  // We clear and refill inside the gauge function to ensure 
  // the color change applies to the whole "bar"
  strip.clear();
  for (int i = 0; i < count; i++) {
    if (i < NUM_LEDS) {
      strip.setPixelColor(i, color);
    }
  }
  strip.show();
}