/*This program will alert the user that there is an increase in incoming emails
through lights and speed of a neopixel, it can be reset by pushing a button*/

#include "neopixel.h"
#include <math.h>

// IMPORTANT: Set pixel COUNT, PIN and TYPE
#define PIXEL_PIN D0
#define PIXEL_COUNT 24
#define PIXEL_TYPE WS2812B


int status = 0;
int pixel_position = 0;
int btnState = LOW;// initialize the button
int btn = D1;//Led btn

//No new emails, breathe

// IMPORTANT: Set pixel COUNT, PIN and TYPE
Adafruit_NeoPixel strip = Adafruit_NeoPixel(PIXEL_COUNT, PIXEL_PIN, PIXEL_TYPE);

void setup() {

  Serial.begin( 9600 );

  strip.begin();
  strip.show(); // Initialize all pixels to 'off'

  pinMode(btn, INPUT_PULLUP);

  Particle.subscribe( "diot_breathe", emailcheck );

}


void loop() {

  TurnOn();

  if(status < 1){
    breathe();
  }

  else if(1<=status<2){
    colorchase();
  }

  else {fastcolorchase();
  }

  delay( 50 );

  Serial.println (status);
}


void emailcheck(const char *event, const char *data){

    status = status+1;
    }


void TurnOn()
    {
     // find out if the button is pushed
     // or not by reading from it.
     int currentButtonState = digitalRead(btn);
     if( currentButtonState == LOW && btnState != currentButtonState ){
         status = 0;
     }
     btnState = currentButtonState;
    }

/* Calc the sin wave for the breathing white led */
float breathe() {

  float val = (exp(sin(millis()/2000.0*M_PI)) - 0.36787944)*108.0;
  Serial.println( val );

  uint16_t i;
  uint32_t c = strip.Color(val, val, val);

  for(i=0; i< strip.numPixels(); i++) {
    strip.setPixelColor(i, c );
  }
  strip.show();

}


int colorchase() {
  for(int i=0; i< strip.numPixels(); i++) {
    uint32_t c;

    if( pixel_position == i ){
      c = strip.Color(50, 255, 10);
    }else{
      c = strip.Color(0, 0, 0);
    }
    strip.setPixelColor(i, c );
  }
  strip.show();

  pixel_position++;
  if( pixel_position >= strip.numPixels() )
  {
    pixel_position = 0;
  }
}


int fastcolorchase() {
for(int i=0; i< strip.numPixels(); i++) {
  uint32_t c;

  if( pixel_position == i ){
    c = strip.Color(255, 0, 0);

  }else{
    c = strip.Color(0, 0, 0);
  }
  strip.setPixelColor(i, c );
}
strip.show();

pixel_position++;
if( pixel_position >= strip.numPixels() )
{
  pixel_position = 0;
}
}

//0 - 5 emails, increases by one dot for each email up to 5

//5+ emails, increase speed/change color

//Check emails, press button to reset*/