// copied from https://wokwi.com/projects/382852321750445057

#include <FastLED.h>

#define LED_PIN     5
#define NUM_LEDS    50
#define BRIGHTNESS  255
#define LED_TYPE    WS2811
#define COLOR_ORDER GRB
CRGB leds[NUM_LEDS];

#define UPDATES_PER_SECOND 100

// This example shows several ways to set up and use 'palettes' of colors
// with FastLED.
//
// These compact palettes provide an easy way to re-colorize your
// animation on the fly, quickly, easily, and with low overhead.
//
// USING palettes is MUCH simpler in practice than in theory, so first just
// run this sketch, and watch the pretty lights as you then read through
// the code.  Although this sketch has eight (or more) different color schemes,
// the entire sketch compiles down to about 6.5K on AVR.
//
// FastLED provides a few pre-configured color palettes, and makes it
// extremely easy to make up your own color schemes with palettes.
//
// Some notes on the more abstract 'theory and practice' of
// FastLED compact palettes are at the bottom of this file.



CRGBPalette16 currentPalette;
TBlendType    currentBlending;

extern CRGBPalette16 myRedWhiteBluePalette;
extern const TProgmemPalette16 myRedWhiteBluePalette_p PROGMEM;


void setup() {
  Serial.begin(115200);
  FastLED.addLeds<LED_TYPE, LED_PIN, COLOR_ORDER>(leds, NUM_LEDS).setCorrection( TypicalLEDStrip );
  FastLED.setBrightness( BRIGHTNESS );
  set_max_power_in_volts_and_milliamps(5,1500);
  set_max_power_indicator_LED(13);
  currentPalette = RainbowColors_p;
  currentBlending = LINEARBLEND;
}

void loop()
{
  updatePaletteAnalogs();
  updateLeds();
}

void updatePaletteAnalogs(void) {
  static int oldH, oldS, oldV;
  unsigned long last = 0;
  if (millis() - last >= 1000/UPDATES_PER_SECOND) {
    last = millis();
    //  Serial.print("u");
    int H = analogRead(A0) / 4;
    int S = analogRead(A1) / 4;
    int V = analogRead(A2) / 4;
    if (oldH != H || oldS != S || oldV != V) {
      Serial.print(".");
      if(H != oldH){Serial.print("H:");Serial.print(H); }
      if(S != oldS){Serial.print("S:");Serial.print(S); }
      if(V != oldV){Serial.print("V:");Serial.print(V); }
      oldH = H;
      oldS = S;
      oldV = V;
     // Serial.print(H);Serial.print('.');
     // Serial.print(S);Serial.print('.');
     // Serial.print(V);Serial.print(' ');
      for ( int i = 0; i < 16; i++) {
        currentPalette[i] = CHSV( H, S, V);
      }
    }
  }
}

void updateLeds(void) {
  static unsigned long last = 0;
  const unsigned long interval = 400;
  unsigned long now = millis();
  static uint8_t startIndex = 0;

  if (now - last >= interval) {
    last = now;
    startIndex = startIndex + 1; /* motion speed */
    FillLEDsFromPaletteColors( startIndex);
    FastLED.show();
  }
}

void FillLEDsFromPaletteColors( uint8_t colorIndex)
{
  uint8_t brightness = 255;

  for ( int i = 0; i < NUM_LEDS; i++) {
    leds[i] = ColorFromPalette( currentPalette, colorIndex, brightness, currentBlending);
    colorIndex += 3;
  }
}