/*
 * James Brown
 * Version 1
 *
 *
 */

 const int pinPhoto = A0;
 const int pinred= 9;
 const int pingreen = 10;
 const int pinblue = 11;
 int lightLevel = 0;
 int bright = 0;
 const int pinButt = 2;
 int lastButt = 0;
 int newButt = 0;
 unsigned long timeStart;
 int minimum = 5000;
 int maximum = -5000;


 void setup() {
  // put your setup code here, to run once:

pinMode (pinPhoto, INPUT);
pinMode (pinred, OUTPUT);
pinMode (pingreen, OUTPUT);
pinMode (pinblue, OUTPUT);
pinMode (pinButt, INPUT);
Serial.begin (9600);

analogWrite (pinred, 255);
delay (500);
analogWrite (pinred, 0);
analogWrite (pingreen, 255);
delay (500);
analogWrite (pingreen, 0);
analogWrite (pinblue, 255);
delay (500);
analogWrite (pinblue, 0);


}

void loop() {
  // put your main code here, to run repeatedly:

//Serial.print (digitalRead(pinButt));

  lightLevel = analogRead(pinPhoto);
  bright = map (lightLevel, minimum, maximum, 255, 0);
  bright = constrain (bright, 0, 255);
  analogWrite (pinblue, bright);
  analogWrite (pinred, bright);
  analogWrite (pingreen, 0);

  //Serial.print (" Light Level = ");
  //Serial.print (lightLevel);
  //Serial.print ("bright = ");
  //Serial.println (bright);

  newButt = debounce (lastButt);
//Serial.print (newButt);
if (lastButt == LOW && newButt == HIGH)

{
  Serial.println("Calibrating...");
  calibrate();

}

lastButt = newButt;

  lightLevel = analogRead(pinPhoto);
  bright = map(lightLevel, minimum, maximum, 255, 0-(maximum/10));
  bright = constrain(bright, 0, 255);
if (bright > minimum && bright < (maximum-minimum /5))
{
    analogWrite (pingreen, 50/255*bright);
    analogWrite (pinblue, 50/255*bright);
    analogWrite (pinred, 255/255*bright);

}
}
boolean debounce(boolean last)
{
  boolean current = digitalRead(pinButt);
  if (last != current)
  {
    delay(5);
    current = digitalRead(pinButt);
  }
  return current;
}
  void calibrate ()
  {
    maximum = -5000;
    minimum = 5000;
    analogWrite (pinred, 255);
    analogWrite (pinblue, 0);
    analogWrite (pingreen, 0);
    delay (200);
    analogWrite (pinred, 0);
    analogWrite (pinblue, 0);
    analogWrite (pingreen, 0);
    timeStart = millis();
    while (millis() - timeStart <5000)
    {
      lightLevel = analogRead (pinPhoto);
      if (lightLevel > maximum)
        {
          maximum = lightLevel;
        }
        else if (lightLevel < minimum)
        {
          minimum = lightLevel;
        }
    }
    Serial.println (minimum);
    Serial.println (maximum);
}