#include <Adafruit_CircuitPlayground.h>

#include <FastLED.h>

#include <Wire.h>

#include <SPI.h>

#include <math.h>

// — External strip —

#define STRIP_PIN A2

#define STRIP_LEDS 30

#define LED_TYPE WS2812B

#define COLOR_ORDER GRB

CRGB stripLeds[STRIP_LEDS];

int sensorPin = A1;  // there is no A10…

int sensorValue = 0;

int brightVal = 255;

// — Color list: {red, green, blue} —

const uint8_t colors[][3] = {

  // you need three things in this array

  { 0, 180, 255 },  // cyan

  { 9, 9, 217 },    // blue

  {140,   0, 255},  // {140,   0, 255},   // purple

  { 252, 3, 82 },   // hot pink

};

const int NUM_COLORS = sizeof(colors) / sizeof(colors[0]);

int colorIndex = 0;

// — Shake detection tuning —

const float SHAKE_THRESHOLD = 7.0;

const int SHAKE_COOLDOWN = 350;

unsigned long lastShakeTime = 0;

bool wasShaking = false;

void setup() {

  CircuitPlayground.begin();

  CircuitPlayground.clearPixels();

  CircuitPlayground.setBrightness(brightVal);

  FastLED.addLeds<LED_TYPE, STRIP_PIN, COLOR_ORDER>(stripLeds, STRIP_LEDS)

    .setDither(brightVal < 255);

  FastLED.setBrightness(brightVal);

  // Sanity flash: red on both outputs for 1 second

 // fill_solid(stripLeds, STRIP_LEDS, CRGB::Red);

 // FastLED.show();

 // for (int i = 0; i < 10; i++) CircuitPlayground.setPixelColor(i, 255, 0, 0);

 // CircuitPlayground.strip.show();

 // delay(1000);

 // fill_solid(stripLeds, STRIP_LEDS, CRGB::Black);

 // FastLED.show();

 // for (int i = 0; i < 10; i++) CircuitPlayground.setPixelColor(i, 0, 0, 0);

 // CircuitPlayground.strip.show();

}

void setAllPixels(uint8_t r, uint8_t g, uint8_t b) {

  // CPX onboard 10 pixels

  for (int i = 0; i < 10; i++) {

    // CircuitPlayground.strip.setPixelColor(i, r, g, b); // not strip

    CircuitPlayground.setPixelColor(i, r, g, b);

  }

  // CircuitPlayground.strip.show(); //not needed

  // External 30-pixel strip

  fill_solid(stripLeds, STRIP_LEDS, CRGB(r, g, b));

  FastLED.setBrightness(brightVal);

  FastLED.show();

}

void loop() {

  // Brightness from pot

  sensorValue = analogRead(sensorPin);

  brightVal = map(sensorValue, 0, 1023, 0, 225);

  // CircuitPlayground.setBrightness(brightVal); redundant with FastLED brightness

  // Shake detection

  float x = CircuitPlayground.motionX();

  float y = CircuitPlayground.motionY();

  float z = CircuitPlayground.motionZ();

  float magnitude = sqrt(x * x + y * y + z * z);

  float shakeForce = abs(magnitude – 9.8);

  unsigned long now = millis();

  if (shakeForce > SHAKE_THRESHOLD) {

    if (!wasShaking && (now – lastShakeTime > SHAKE_COOLDOWN)) {

      colorIndex = (colorIndex + 1) % NUM_COLORS;

      lastShakeTime = now;

    }

    wasShaking = true;

  } else {

    wasShaking = false;

  }

  setAllPixels(colors[colorIndex][0], colors[colorIndex][1], colors[colorIndex][2]);

  delay(10);  // teeny break

}