#include "LPD8806.h"
#include "SPI.h"

// Simple test for 160 (5 meters) of LPD8806-based RGB LED strip

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

// Number of RGB LEDs in strand:
int nLEDs = 160;

// Chose 2 pins for output; can be any valid output pins:
int dataPin  = 2;
int clockPin = 3;

// First parameter is the number of LEDs in the strand.  The LED strips
// are 32 LEDs per meter but you can extend or cut the strip.  Next two
// parameters are SPI data and clock pins:
LPD8806 strip = LPD8806(nLEDs, dataPin, clockPin);

// You can optionally use hardware SPI for faster writes, just leave out
// the data and clock pin parameters.  But this does limit use to very
// specific pins on the Arduino.  For "classic" Arduinos (Uno, Duemilanove,
// etc.), data = pin 11, clock = pin 13.  For Arduino Mega, data = pin 51,
// clock = pin 52.  For 32u4 Breakout Board+ and Teensy, data = pin B2,
// clock = pin B1.  For Leonardo, this can ONLY be done on the ICSP pins.
//LPD8806 strip = LPD8806(nLEDs);

uint32_t SCHEMES[5][4] = {
{
  strip.Color(117, 0, 27),
  strip.Color(127, 43, 0),
  strip.Color(0, 85, 57),
  strip.Color(41, 111, 0)
},
{
  strip.Color(99,0,62),
  strip.Color(124,0,9),
  strip.Color(53,5,85),
  strip.Color(84,120,0)
},
{
  strip.Color(127,95,0),
  strip.Color(41,7,86),
  strip.Color(41,7,86),
  strip.Color(5,48,82)
},
{
  strip.Color(0,93,31),
  strip.Color(3,60,79),
  strip.Color(67,117,0),
  strip.Color(127,20,0)
},
{
  strip.Color(79,119,0),
  strip.Color(0,102,0),
  strip.Color(127,0,0),
  strip.Color(102,0,58)
}};

int mode;
unsigned long last;
uint32_t* scheme;

void setup() {
  // Start up the LED strip
  strip.begin();

  // Update the strip, to start they are all 'off'
  strip.show();

  randomSeed(analogRead(0));
  mode = 1;
  scheme = SCHEMES[random(5)];
  last = 0;
}

void loop() {
  unsigned long t = millis();
  if (t - last > 25000) {
    mode = (mode + 1) % 2;
    scheme = SCHEMES[random(5)];
    last = t;
  }
  if (mode == 0)
    chase(scheme);
  else if (mode == 1)
    sparkle(scheme);
}

void sparkle(uint32_t* scheme) {
  int i;
  uint32_t c;
  uint8_t wait;

  // Start by turning all pixels off:
  for(i=0; i<strip.numPixels(); i++) strip.setPixelColor(i, 0);

  // Then display one pixel at a time:
  for(i=0; i<strip.numPixels(); i++) {
    c = scheme[random(4)];
    strip.setPixelColor(i, c); // Set new pixel 'on'
    // strip.show();              // Refresh LED states
    // strip.setPixelColor(i, 0); // Erase pixel, but don't refresh!
    // delay(random(30));
  }

  strip.show(); // Refresh to turn off last pixel
  delay(50);
}

void chase(uint32_t* scheme) {
  int i;
  uint32_t c;
  uint8_t wait;

  // Start by turning all pixels off:
  for(i=0; i<strip.numPixels(); i++) strip.setPixelColor(i, 0);

  // Then display one pixel at a time:
  for(i=0; i<strip.numPixels(); i++) {
    c = scheme[random(4)];
    strip.setPixelColor(i, c); // Set new pixel 'on'
    strip.setPixelColor((i * 2) % nLEDs, c); // Set new pixel 'on'
    strip.setPixelColor((i * 3) % nLEDs, c); // Set new pixel 'on'
    strip.setPixelColor((i * 5) % nLEDs, c); // Set new pixel 'on'
    strip.show();              // Refresh LED states
    strip.setPixelColor(i, 0); // Erase pixel, but don't refresh!
    strip.setPixelColor((i * 2) % nLEDs, 0); // Set new pixel 'on'
    strip.setPixelColor((i * 3) % nLEDs, c); // Set new pixel 'on'
    strip.setPixelColor((i * 5) % nLEDs, c); // Set new pixel 'on'
    delay(random(30));
  }

  strip.show(); // Refresh to turn off last pixel
}