/**************************************************************************/
/*
  NeoPixel_Headband: displays fancy NeoPixel patterns on a headband
  
  v1.0 5/13/15 - NeoPixel 15 strip
  

  Based on Adafruit's strandtest code.

    ----> https://www.adafruit.com/
    
    Adafruit invests time and resources providing this open source code,
    please support Adafruit and open-source hardware by purchasing
    products from Adafruit!

*/
/**************************************************************************/


#include <Adafruit_NeoPixel.h>

#define PIN 0

// Parameter 1 = number of pixels in strip
// Parameter 2 = pin number (most are valid)
// Parameter 3 = pixel type flags, add together as needed:
//   NEO_KHZ800  800 KHz bitstream (most NeoPixel products w/WS2812 LEDs)
//   NEO_KHZ400  400 KHz (classic 'v1' (not v2) FLORA pixels, WS2811 drivers)
//   NEO_GRB     Pixels are wired for GRB bitstream (most NeoPixel products)
//   NEO_RGB     Pixels are wired for RGB bitstream (v1 FLORA pixels, not v2)
Adafruit_NeoPixel strip = Adafruit_NeoPixel(15, PIN, NEO_GRB + NEO_KHZ800);

/* Some other colors
  colorWipe(strip.Color(219,112,147), 50); // pink
  colorWipe(strip.Color(135,206,255), 50); // skyBlue
  colorWipe(strip.Color(128,158,10), 50); // maize
  colorWipe(strip.Color(88,2,163), 50); // lavender
  colorWipe(strip.Color(32,178,170), 50); // seaFoam
  colorWipe(strip.Color(102,205,0), 50); // spring
  colorWipe(strip.Color(237,120,6), 50); // orange
*/

void setup() {
  strip.begin();
  strip.show(); // Initialize all pixels to 'off'
  strip.setBrightness(85); // 1/3 brightness

}

void loop() {
  // Some example procedures showing how to display to the pixels:
//  sparks(40);
  colorWipe(strip.Color(255, 0, 0), 50); // Red
  colorWipe(strip.Color(0, 255, 0), 50); // Green
  colorWipe(strip.Color(0, 0, 255), 50); // Blue
  colorWipe(strip.Color(219,112,147), 100); // Pink
  colorWipe(strip.Color(135,206,255), 100); // skyBlue
  colorWipe(strip.Color(128,158,10), 100); // maize
  colorWipe(strip.Color(88,2,163), 100); // lavender
  colorWipe(strip.Color(32,178,170), 100); // seaFoam
  colorWipe(strip.Color(102,205,0), 100); // spring
  colorWipe(strip.Color(237,120,6), 100); // orange

 // theaterChase(strip.Color(127, 127, 127), 200); // White
  theaterChase(strip.Color(219,112,147), 200); // Pink
  theaterChase(strip.Color(0, 0, 255), 200); // Blue

  rainbow(20);
  rainbowCycle(20);
}

// Sparkles!
void sparks(uint8_t wait) {

uint32_t color  = 0xFF0000; // Start red
  strip.show(); // Initialize all pixels to 'off'

  for(uint16_t i=0; i<strip.numPixels(); i++) {
    
    uint8_t  p = random(strip.numPixels());
  
    strip.setPixelColor(p, color);
    strip.show();
    delay(10);
    strip.setPixelColor(p, 0);
    delay(wait);
    color >>= 8;                 // Next color R->G->B
    if(!color) color = 0xFF0000; // Reset to red

  }
  strip.show(); // Initialize all pixels to 'off'

}


// Fill the dots one after the other with a color
void colorWipe(uint32_t c, uint8_t wait) {
  for(uint16_t i=0; i<strip.numPixels(); i++) {
      strip.setPixelColor(i, c);
      strip.show();
      delay(wait);
  }
}

void rainbow(uint8_t wait) {
  uint16_t i, j;

  for(j=0; j<256; j++) {
    for(i=0; i<strip.numPixels(); i++) {
      strip.setPixelColor(i, Wheel((i+j) & 255));
    }
    strip.show();
    delay(wait);
  }
}

// Slightly different, this makes the rainbow equally distributed throughout
void rainbowCycle(uint8_t wait) {
  uint16_t i, j;

  for(j=0; j<256*5; j++) { // 5 cycles of all colors on wheel
    for(i=0; i< strip.numPixels(); i++) {
      strip.setPixelColor(i, Wheel(((i * 256 / strip.numPixels()) + j) & 255));
    }
    strip.show();
    delay(wait);
  }
}

//Theatre-style crawling lights.
void theaterChase(uint32_t c, uint8_t wait) {
  for (int j=0; j<10; j++) {  //do 10 cycles of chasing
    for (int q=0; q < 3; q++) {
      for (int i=0; i < strip.numPixels(); i=i+3) {
        strip.setPixelColor(i+q, c);    //turn every third pixel on
      }
      strip.show();
     
      delay(wait);
     
      for (int i=0; i < strip.numPixels(); i=i+3) {
        strip.setPixelColor(i+q, 0);        //turn every third pixel off
      }
    }
  }
}


// Input a value 0 to 255 to get a color value.
// The colours are a transition r - g - b - back to r.
uint32_t Wheel(byte WheelPos) {
  if(WheelPos < 85) {
   return strip.Color(WheelPos * 3, 255 - WheelPos * 3, 0);
  } else if(WheelPos < 170) {
   WheelPos -= 85;
   return strip.Color(255 - WheelPos * 3, 0, WheelPos * 3);
  } else {
   WheelPos -= 170;
   return strip.Color(0, WheelPos * 3, 255 - WheelPos * 3);
  }
}