#include <FastLED_NeoPixel.h>
#define NB 4
#define NUM_LEDS 24 // Number of NeoPixels
#define DATA_PIN 6  // Digital IO pin connected to the NeoPixels.
#define BRIGHTNESS 50 // LED brightness, 0 (min) to 255 (max)

//BUTTONS
////Momentary button vars
int bp[NB] = {7, 8, 9, 10}; //arduino input pin numbers
boolean bg[NB] = {false, false, false, false};
//Toggle button vars
int btv[NB] = {0, 0, 0, 0};
int btamt[NB] = {2, 2, 2, 2};;
boolean btg[NB] = {true, true, true, true};
FastLED_NeoPixel<NUM_LEDS, DATA_PIN, NEO_GRB> strip;      // <- FastLED NeoPixel version
const unsigned long wipeColors[4] = {
0xff00000,  // Red
0x00ff00,   // Green
0x0000ff,   // Blue
0xffa500,   // Orange
};


void setup() {
  Serial.begin(9600);
  for (int i = 0; i < NB; i++) pinMode(bp[i], INPUT_PULLUP);
  strip.begin();           // INITIALIZE NeoPixel strip object (REQUIRED)
  strip.show();            // Turn OFF all pixels ASAP
  strip.setBrightness(200); // Set BRIGHTNESS (max = 255)
  
  
}

void loop() {

  static byte whichColor;
  colorWipe(strip.Color(wipeColors[whichColor]), 50);
  whichColor++; if (whichColor >= 4) whichColor = 0; 

  //BUTTONS
  for (int i = 0; i < NB; i++) {

    if ( digitalRead(bp[i]) == LOW) { //button pushed
    
  

      //momentary
      if (bg[i]) {
        bg[i] = false;
        Serial.print("b");
        Serial.print(String(i));
        Serial.print(":");
       // Serial.print( "b" + String(i) + ":");
        Serial.println(1);
      }

      //momentary
      while ( digitalRead(bp[0]) == LOW) {
        bg[0] = false;
        rainbow(10, 3);   

      }
      

      //momentary
      while ( digitalRead(bp[1]) == LOW) {
        bg[1] = false;
        colorWipe(strip.Color(255,   0,   0), 5); // Red
        colorWipe(strip.Color(  0,   0, 255), 5); // Blue
                     
      }

      //momentary
      while ( digitalRead(bp[2]) == LOW) {
        bg[2] = false;
        theaterChase(strip.Color(255, 255, 255), 100, 3, 5); // White, half brightness

      }

      //momentary
      while ( digitalRead(bp[3]) == LOW) {
        bg[3] = false;
        theaterChase(strip.Color(127, 127, 127), 100, 3, 5); // White, half brightness
      }      



    }
    else { //button released

      //momentary
      if (!bg[i]) {
        bg[i] = true;          
        Serial.print( "b" + String(i) + ":");
        Serial.println(0);
    

      }



    }

  }
  delay(30);
}
/*
* Fills a strip with a specific color, starting at 0 and continuing
* until the entire strip is filled. Takes two arguments:
* 
*     1. the color to use in the fill
*     2. the amount of time to wait after writing each LED
*/
void colorWipe(uint32_t color, unsigned long wait) {
	for (unsigned int i = 0; i < strip.numPixels(); i++) {
		strip.setPixelColor(i, color);
		strip.show();
		delay(wait);
	}
}

/*
* Runs a marquee style "chase" sequence. Takes three arguments:
*
*     1. the color to use in the chase
*     2. the amount of time to wait between frames
*     3. the number of LEDs in each 'chase' group
*     3. the number of chases sequences to perform
*/
void theaterChase(uint32_t color, unsigned long wait, unsigned int groupSize, unsigned int numChases) {
	for (unsigned int chase = 0; chase < numChases; chase++) {
		for (unsigned int pos = 0; pos < groupSize; pos++) {
			strip.clear();  // turn off all LEDs
			for (unsigned int i = pos; i < strip.numPixels(); i += groupSize) {
				strip.setPixelColor(i, color);  // turn on the current group
			}
			strip.show();
			delay(wait);
		}
	}
}

/*
* Simple rainbow animation, iterating through all 8-bit hues. LED color changes
* based on position in the strip. Takes two arguments:
* 
*     1. the amount of time to wait between frames
*     2. the number of rainbows to loop through
*/
void rainbow(unsigned long wait, unsigned int numLoops) {
	for (unsigned int count = 0; count < numLoops; count++) {
		// iterate through all 8-bit hues, using 16-bit values for granularity
		for (unsigned long firstPixelHue = 0; firstPixelHue < 65536; firstPixelHue += 256) {
			for (unsigned int i = 0; i < strip.numPixels(); i++) {
				unsigned long pixelHue = firstPixelHue + (i * 65536UL / strip.numPixels()); // vary LED hue based on position
				strip.setPixelColor(i, strip.gamma32(strip.ColorHSV(pixelHue)));  // assign color, using gamma curve for a more natural look
			}
			strip.show();
			delay(wait);
		}
	}
}