// Auto added when pulling in library (remember to do this!) 
include <neopixel.h>

// Set pixel COUNT, PIN and TYPE
#define PIXEL_PIN D2
#define PIXEL_COUNT 16
#define PIXEL_TYPE WS2812

Adafruit_NeoPixel strip = Adafruit_NeoPixel(PIXEL_COUNT, PIXEL_PIN, PIXEL_TYPE);

bool meetStatus = false;
bool GreenOn = false;

unsigned long timeAtStart = 0;
unsigned long timeToFade = (60*15000); //15 minutes

float redVal = 255.0;
float greenVal = 255.0;
float blueVal = 255.0;

void setup() {

  strip.begin();
  strip.show(); // Initialize all pixels to 'off'
  
  Particle.function("meeting_soon", meetingSoon);
}

int meetingSoon(String arg){
    
    timeAtStart = millis();
    if (arg == "yes"){
        meetingStatus = true;
    } else if (arg == "no") {
        meetingStatus = false;
    }
    return 0;
}

void loop() {

  uint32_t white = strip.Color(255, 255, 255); // white
  uint32_t red = strip.Color(0, 0, 255); // green
  uint32_t currentColor;

  if (meetStatus == true) {
      
    unsigned long now = millis();
    
    while (now - timeAtStart <= timeToFade){
        now = millis();
        redVal -= (255/60);
        blueVal -= (255/60);
        currentColor = strip.Color(255, redVal, blueVal);
        for( int i=0; i< strip.numPixels(); i++) {
            strip.setPixelColor(i, currentColor);
            strip.setBrightness(20);
        }
        strip.show();
        delay(15000);
    }