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//***************************************************************
// Code example for Post-Master Sodium
// https://plus.google.com/112460818250824432487/posts/4MiomMJAcpF
//
// This is a modified version of Erin St Blaine's animated glow
// scarf code from:
// https://learn.adafruit.com/animated-neopixel-gemma-glow-fur-scarf/the-code
//
//
// Marc Miller, May 2017
//***************************************************************

#include <FastLED.h>

// Number of hoops, and number of leds in each hoop
#define NUM_HOOPS   4  // number of hoops in the dress
#define NUM_HOOP1   8  // how many LEDs in 1st hoop
#define NUM_HOOP2   8  // how many LEDs in 2nd hoop
#define NUM_HOOP3   8  // how many LEDs in 3rd hoop
#define NUM_HOOP4   8  // how many LEDs in 4th hoop

// Total LEDs in the whole dress, which is the sum of the leds from all hoops
#define NUM_LEDS    NUM_HOOP1 + NUM_HOOP2 + NUM_HOOP3 + NUM_HOOP4

CRGB leds[NUM_LEDS];
CRGB leds_temp[NUM_HOOPS];  // Temp array of length NUM_HOOPS for blending colors

#define DATA_PIN 11
#define CLOCK_PIN 13
#define COLOR_ORDER GRB  // Try mixing up the letters (RGB, GBR, BRG, etc) for a whole new world of color combinations
#define BRIGHTNESS 200  // 0-255, higher number is brighter. 
#define SATURATION 255  // 0-255, 0 is pure white, 255 is fully saturated color
#define SPEED       10  // How fast the colors move.  Higher numbers = faster motion
#define STEPS       10  // How agressive the color gradient is.  Lower is smoother transition.
#define BUTTON_PIN   4  // button is connected to pin 2 and GND


//---------------------------------------------------------------
//FastLED comes with several palettes pre-programmed.  I like purple a LOT, and so I added a custom purple palette.

const TProgmemPalette16 PurpleColors_p PROGMEM =
{
  CRGB::Purple,
  CRGB::Purple, 
  CRGB::MidnightBlue,
  CRGB::MidnightBlue,

  CRGB::Purple,
  CRGB::Purple,
  CRGB::BlueViolet,
  CRGB::BlueViolet,

  CRGB::DarkTurquoise,
  CRGB::DarkTurquoise,
  CRGB::DarkBlue,
  CRGB::DarkBlue,

  CRGB::Purple,
  CRGB::Purple,
  CRGB::BlueViolet,
  CRGB::BlueViolet
};

//---------------------------------------------------------------
CRGBPalette16 currentPalette;
CRGBPalette16 targetPalette( PurpleColors_p );
TBlendType    currentBlending;
int ledMode = 4;  // Starting palette

unsigned long keyPrevMillis = 0;
const unsigned long keySampleIntervalMs = 25;
byte longKeyPressCountMax = 80;    // 80 * 25 = 2000 ms
byte longKeyPressCount = 0;

byte prevKeyState = HIGH;         // button is active low


//---------------------------------------------------------------
void setup() {
  Serial.begin(115200);
  delay(3000);  // 3 second delay
  FastLED.addLeds<LPD8806, DATA_PIN, CLOCK_PIN, COLOR_ORDER>(leds, NUM_LEDS).setCorrection( TypicalLEDStrip );
  FastLED.setBrightness(  BRIGHTNESS );
  currentBlending =LINEARBLEND;
  pinMode(BUTTON_PIN, INPUT_PULLUP);

  // Check sum of hoop pixels add up to the total number of pixels in dress
  Serial.print("Total number of pixels (ie. NUM_LEDS):  "); Serial.println(NUM_LEDS);
}


//---------------------------------------------------------------
void loop() {

  byte currKeyState = digitalRead(BUTTON_PIN);

  if ((prevKeyState == LOW) && (currKeyState == HIGH)) {
    shortKeyPress();
  }
  prevKeyState = currKeyState;

  static uint8_t startIndex = 0;
  startIndex = startIndex + 1; /* motion speed */

  switch (ledMode) {

  case 0:
    currentPalette = HeatColors_p;    //Red & Yellow, Fire Colors
    break;
  case 1:
    currentPalette = ForestColors_p;    //Foresty greens and yellows
    break;
  case 2: 
    currentPalette = OceanColors_p;  //Oceans are pretty and filled with mermaids
    break;
  case 3: 
    currentPalette = PurpleColors_p;  //My custom palette from above
    break;
  case 4:
    currentPalette = RainbowColors_p;  //All the colors!
    break;
  case 5:
    currentPalette = RainbowStripeColors_p;   //Rainbow stripes
    break;      
  case 6:
    currentPalette = PartyColors_p; //All the colors except the greens, which make people look a bit washed out
    break;
  } 

  FillLEDsFromPaletteColors( startIndex);
  FillHoops();
  FastLED.show();
  FastLED.delay(1000 / SPEED);  
}


//---------------------------------------------------------------
void FillLEDsFromPaletteColors( uint8_t colorIndex) {
  // **modified to use NUM_HOOPS and leds_temp**
  for( int i = 0; i < NUM_HOOPS; i++) {
    leds_temp[i] = ColorFromPalette( currentPalette, colorIndex, BRIGHTNESS, currentBlending);
    colorIndex += STEPS;              
  }
}


//---------------------------------------------------------------
void shortKeyPress() {
  ledMode++;
  if (ledMode > 6) {
    ledMode=0; 
  }  
}


//---------------------------------------------------------------
void FillHoops() {
  //Copy the colors from leds_temp to leds, filling the number of pixels in each hoop
  //                start position,                 number to fill,   fill color
  fill_solid(leds,                                    NUM_HOOP1,      leds_temp[0]);
  fill_solid(leds+NUM_HOOP1,                          NUM_HOOP2,      leds_temp[1]);
  fill_solid(leds+NUM_HOOP1 + NUM_HOOP2,              NUM_HOOP3,      leds_temp[2]);
  fill_solid(leds+NUM_HOOP1 + NUM_HOOP2 + NUM_HOOP3,  NUM_HOOP4,      leds_temp[3]);
  // If there are more of less hoops this will need to be adjusted as needed.

  // Uncomment the below when testing to visualize the leds_temp R,G,B values
    //EVERY_N_SECONDS(1) {
    //  Serial.print("leds_temp[0]:  "); Serial.print(leds_temp[0].r); Serial.print("\t");
    //    Serial.print(leds_temp[0].g); Serial.print("\t"); Serial.println(leds_temp[0].b);
    //  Serial.print("leds_temp[1]:  "); Serial.print(leds_temp[1].r); Serial.print("\t");
    //    Serial.print(leds_temp[1].g); Serial.print("\t"); Serial.println(leds_temp[1].b);
    //  Serial.print("leds_temp[2]:  "); Serial.print(leds_temp[2].r); Serial.print("\t");
    //    Serial.print(leds_temp[2].g); Serial.print("\t"); Serial.println(leds_temp[2].b);
    //  Serial.print("leds_temp[3]:  "); Serial.print(leds_temp[3].r); Serial.print("\t");
    //    Serial.print(leds_temp[3].g); Serial.print("\t"); Serial.println(leds_temp[3].b);
    //  Serial.println(" ");
    //}

}