//SkillDev3

// This #include statement was automatically added by the Particle IDE.
#include <neopixel.h>

// IMPORTANT: 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);

//two different color settings
uint32_t w = strip.Color(255, 255, 255);
uint32_t r = strip.Color(255, 0, 0);
uint16_t i;

//brightness and timing variables
int brightness = 0;
unsigned long lastFade = 0;

// timing settings for different states
int fadeDuration = 10000;       // Time to fade between colors
int transitionDuration = 20000; // Time for transitioning between events
int outDuration = 10000;        // Time to keep the lights on before turning off

long timeStart = -1;
bool timerStarted = false;
// Added flag to track the direction of the fade
bool fadingToRed = true;


void setup() {
    
    strip.begin();

    // Set the initial state to white
    for (int i = 0; i < strip.numPixels(); i++) {
        strip.setPixelColor(i, w);
    }

    strip.show();
    
    // Add the IFTTT Function
    Particle.function("CalEvent", calEvent); 
}


void loop() {
    // Check if the timer is started
    if (timerStarted) {
        long timeNow = millis();
        long timeElapsed = timeNow - timeStart;

        if (timeElapsed < fadeDuration) {
            // Calculate color value for fading effect
            int colorValue = map(timeElapsed, 0, fadeDuration, 0, 255);

            // Update RGB values based on fading direction
            int r, g, b;
            if (fadingToRed) {
                r = 255;
                g = 255 - colorValue;
                b = 255 - colorValue;
            } else {
                r = 255;
                g = 0 + colorValue;
                b = 0 + colorValue;
            }

            // Set NeoPixel colors
            for (int i = 0; i < strip.numPixels(); i++) {
                strip.setPixelColor(i, r, g, b);
            }
            strip.show();
        } else {
            if (fadingToRed) {
                // Toggle the direction of the fade
                fadingToRed = !fadingToRed;

                // Reset the timer and flag
                timeStart = millis();
            } else {
                // Set the light bar to white and stop the timer
                for (int i = 0; i < strip.numPixels(); i++) {
                    strip.setPixelColor(i, 255, 255, 255);
                }
                strip.show();
                timerStarted = false;

                // Reset the fading direction for the next event
                fadingToRed = true;
            }
        }
    }
}

int calEvent(String cmd) {
    timeStart = millis();
    timerStarted = true;
    return 1;
}