int ledPin = 3; //D3
int digiPhotoPin = 19;
//int analogPhotoPin = 20;

int darkness = 0;
bool darkSens = false;
int threshold = 800;

bool isDark = false;
bool lightOn = false;


int dimTime = 1; // 10 in seconds

void setup() {
  // put your setup code here, to run once:
Serial.begin(9600);
pinMode(ledPin, OUTPUT);

//isDark = true;
//lightOn = false; 

//isDark = true;
//lightOn = true; 

//isDark = false;
//lightOn = false; 
}

void loop() {


//analog 
/*darkness = analogRead(A1);
Serial.print("darkness: ");
Serial.println(darkness);
if (darkness > threshold) {
  isDark = true;
}
else {
  isDark = false;
}
*/

//digital 
darkSens = bool(digitalRead(A0));
Serial.print("darkness: ");
Serial.println(darkSens);

if (darkSens == true) {
  isDark = true;
}
else {
  isDark = false;
}
//analogWrite(ledPin,255);delay (10000);

Serial.print("lightOn: ");
Serial.println(lightOn);
Serial.print("isDark: ");
Serial.println(isDark);

if (isDark) {
  if (isDark != lightOn) {
    Serial.println("analogWrite(ledPin,i);");
    for (int i = 0 ; i <= 255; i++) {   
      analogWrite(ledPin,i);   
      Serial.print(i);
      delay (dimTime*1000/256);
    };
    Serial.println();
    lightOn = true;
    Serial.print("lightOn: ");
    Serial.println(lightOn);
  }
}

if (!isDark) {
  if (isDark != lightOn) {
    Serial.print("analogWrite(ledPin,i);");
    for (int i = 255 ; i >= 0; i--) {
      analogWrite(ledPin,i);
      Serial.print(i);
      delay (dimTime*1000/256);
    };
    Serial.println();
    lightOn = false;
    Serial.print("lightOn: ");
    Serial.println(lightOn);
  }
}
//else analogWrite(ledPin,0);
delay(5000); 
}