/* Name: Garrett Haldrup 
<autoNightLight.ino>
Problem: Measure the output of a photo sensor and control leds based on light level
Certification of Authenticity:
I certify that this assignment is entirely my own work.
*/
const int lightSensorPin = A0;
const int START_LED = 2;
const int END_LED = 8;


int pinValue;
float pinValueVolt;

void setup() {
  // put your setup code here, to run once:
  Serial.begin(9600);
  for (int i = START_LED; i <= END_LED; i++) {
    pinMode(i, OUTPUT);
    digitalWrite(i, LOW);
  }
}

void loop() {
  // put your main code here, to run repeatedly:
  pinValue = analogRead(lightSensorPin);
  pinValueVolt = (5.0 / 1023) * pinValue;


  Serial.print("Pin Value: ");
  Serial.print(pinValue);
  Serial.print(" Voltage: ");
  Serial.print(pinValueVolt, 2);
  Serial.println("V");


  switch (pinValue) {
    case 0 ... 99:
      for (int i = START_LED; i <= END_LED; i++) {
        digitalWrite(i, HIGH);
      }
      break;
    case 100 ... 399:
      for (int i = START_LED; i <= END_LED - 3; i++) {
        digitalWrite(i, HIGH);
      }
      for (int i = END_LED - 2; i <= END_LED; i++) {
        digitalWrite(i, LOW);
      }
      break;
    case 400 ... 799:
      for (int i = START_LED; i <= END_LED - 5; i++) {
        digitalWrite(i, HIGH);
      }
      for (int i = END_LED - 4; i <= END_LED; i++) {
        digitalWrite(i, LOW);
      }
      break;
    default:
      for (int i = START_LED; i <= END_LED; i++) {
        digitalWrite(i, LOW);
      }
      break;

  }
}