//This code is intended for the HTMAA 2023 Final Project of Shea Landeene: Flora Aura, a nature-inspired lamp that responds in inverse to the detected ambient light in an environment

// Phototransistor reference code provided by https://thearduinoworkshop.weebly.com/photodiode.html
// NeoPixel Jewel 7 refrence code provided by https://github.com/adafruit/Adafruit_NeoPixel
// Code modified by Shea Landeene for HTMAA 2023


//define variables
#include <Adafruit_NeoPixel.h>
#define PIN        26 //output pin
#define NUMPIXELS 7 //# pixels on NeoPixel Jewel 7
#define DELAYVAL 0 //delay time between individual NeoPixel illumination

int sensorPin = A1; //input pin
int sensorMax = 1023; //maximum value phototransistor will report based on light detection
int boost = 6; //sensitivity parameter to adjust NeoPixel response to light in varying levels of ambient light

Adafruit_NeoPixel pixels(NUMPIXELS, PIN, NEO_GRB + NEO_KHZ800);

void setup(void) {
  Serial.begin(9600);
  pinMode(sensorPin, INPUT); 

  pixels.begin();
}

void loop(void) {
  float sensorPercent = ((float)analogRead(sensorPin)) / sensorMax; //normalize phototransistor sensor readings
  float sensorBoosted = 1.f-constrain(sensorPercent * boost, 0.f, 1.f); //boost the input reading by the sensitivity parameter, and gain percentage in relation to inverse of ambient light

  Serial.println(sensorBoosted); 

  pixels.clear();

  //update color values depending on desired illumination color of NeoPixel Jewel 7
  int red_brightness = 200;
  int green_brightness = 120;
  int blue_brightness = 120;

  float red_percent = sensorBoosted;
  float green_percent = sensorBoosted;
  float blue_percent = sensorBoosted;

  //NeoPixel Jewel 7 response based on ambient light presence detected by phototransistor
  for(int i=0; i<NUMPIXELS; i++) {
    pixels.setPixelColor(i, pixels.Color(int(red_brightness * red_percent), int(green_brightness * green_percent), int(blue_brightness * blue_percent)));
    pixels.show();
    delay(DELAYVAL);
  }

  delay(100); //input reading time delay
}