// Define a pin that we'll place the photo cell on
// Remember to add a 10K Ohm pull-down resistor too.
int photoCellPin = A0;

// Create a variable to hold the light reading
int photoCellReading = 0;

// Define a pin we'll place an LED on
int ledPin = D0;

// Create a variable to store the LED brightness.
int ledBrightness = 0;

//Servo Variabkes
int servoPin = A5;
Servo myServo;
int servoPos = 0;


//
void setup(){

  // Set up the LED for output
  pinMode(ledPin, OUTPUT);

  // Create a cloud variable of type integer
  // called 'light' mapped to photoCellReading
  Particle.variable("light", &photoCellReading, INT);


  // attaches the servo on the A5 pin to the servo object
  myServo.attach( A5 );
  myServo.write(0); // start with servo fully clockwise (down pushup)

   //Register our Particle Core to control the servo
   Particle.function("servo", servoControl);

  // Keep a cloud variable for the current position
  Particle.variable(  "servoPos" , &servoPos , INT );


}

void loop() {

  // Use analogRead to read the photo cell reading
  // This gives us a value from 0 to 4095
  photoCellReading = analogRead(photoCellPin);

  // Map this value into the PWM range (0-255)
  // and store as the led brightness
  ledBrightness = map(photoCellReading, 0, 4095, 0, 255);

  // fade the LED to the desired brightness
  analogWrite(ledPin, ledBrightness);

  // wait 1/10th of a second and then loop
  delay(100);

// Relate the sensor reading to rotate servo
  if ( photoCellReading <= 500) {
    Particle.variable(  "servoPos" , 1 );
    delay(2000);
  }
}

// This function gets called whenever there is a matching API request
// the command string format is 0-128

int servoControl(String command)
{
    // Convert
   int newPos = command.toInt();
   // Make sure it is in the right range
   // And set the position
   servoPos = constrain( newPos, 0 , 180);

   // Set the servo
   myServo.write( servoPos );

   // done
   return 1;
}