/*
Adafruit Arduino - strandtest

Modified by Salama for Fab Academy 2018, Final Project. changed color code and add sensor code.
Modified by Zahrah Al-Yahyaee for Fab Academy 2018, Final Project. Changed color and sensor code.
*/
     // library for serial communication 
#include <Adafruit_NeoPixel.h>    //this is the library for NEOPixel 
#include <SoftwareSerial.h>

#define PIN 8                     // Define the pin for NEOPixel, NEOpixel can be programed with port B only for attiny 44 and 84

// Parameter 1 = number of pixels in strip,  neopixel stick has 8
// Parameter 2 = pin number (most are valid)
// Parameter 3 = pixel type flags, add together as needed:
//   NEO_RGB     Pixels are wired for RGB bitstream
//   NEO_GRB     Pixels are wired for GRB bitstream, correct for neopixel stick
//   NEO_KHZ400  400 KHz bitstream (e.g. FLORA pixels)
//   NEO_KHZ800  800 KHz bitstream (e.g. High Density LED strip), correct for neopixel stick
Adafruit_NeoPixel strip = Adafruit_NeoPixel(20, PIN, NEO_GRB + NEO_KHZ800); // 
int light = 7;                  //Define the sensor pin
int desire = 1000;                //Define at what level the LEDs will change  
int sensor = 0;                 //Initialize the sensor reading from 0

SoftwareSerial myserial(0,1);
void setup()                   
{
  
 pinMode(light,INPUT);          // initialize the sensor pin as an input.
    strip.begin();
  strip.show();                 // Initialize all pixels to 'off'
  myserial.begin(9600);           // set up Serial library at 9600 bps
    Serial.begin(9600);           // set up Serial library at 9600 bps

}

void loop()                       // run over and over again
{
   sensor = analogRead(light);  
      Serial.println(sensor);

    delay(10); 
   if (sensor > desire){         // check if state changed 
 rainbowCycle(2);
//   myserial.println(sensor);

 
   //    colorWipe(strip.Color(0, 0, 255), 20); // no light

  }
else
  {
       colorWipe(strip.Color(255, 255, 255), 20); // no light
         // myserial.println(sensor);

      
      }
  
}

void colorWipe(uint32_t c, uint8_t wait) {
  for(uint16_t i=0; i<strip.numPixels(); i++) {
    strip.setPixelColor(i, c);
    strip.show();
    delay(wait); //wait for few seconds
  }
}
void rainbowCycle(uint8_t wait) {
  uint16_t i, j;

  for(j=0; j<256*5; j++) { // 5 cycles of all colors on wheel
    for(i=0; i< strip.numPixels(); i++) {
      strip.setPixelColor(i, Wheel(((i * 256 / strip.numPixels()) + j) & 255));
    }
    strip.show();
    delay(wait);
  }
}
uint32_t Wheel(byte WheelPos) {
  WheelPos = 255 - WheelPos;
  if(WheelPos < 85) {
    return strip.Color(255 - WheelPos * 3, 0, WheelPos * 3);
  }
  if(WheelPos < 170) {
    WheelPos -= 85;
    return strip.Color(0, WheelPos * 3, 255 - WheelPos * 3);
  }
  WheelPos -= 170;
  return strip.Color(WheelPos * 3, 255 - WheelPos * 3, 0);

}