// 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 = D2;

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

int switchPin = D3;


void setup()
{
  // Set up the LED for output
  pinMode(ledPin, OUTPUT);
  
  pinMode( switchPin , INPUT_PULLUP); // sets pin as input
  
    // Create a cloud variable of type integer
  // called 'light' mapped to photoCellReading
  Particle.variable("light", &photoCellReading, INT);
}

void loop()
{
   // find out if the button is pushed
   // or not by reading from it.
   int buttonState = digitalRead( switchPin );

  // Using a pulldown resistor we get a LOW
  // Signal when its on
  
  if( buttonState == LOW )
      {
        // turn the LED On
          // 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
     
      if( photoCellReading > 3000 )
        {
        // fade the LED to the desired brightness
        analogWrite(ledPin, 255);
    
    
      }else{
          analogWrite(ledPin, 0);
      }

  }else{
    // otherwise
    // turn the LED Off
    digitalWrite( ledPin, LOW);

  }
  
  delay(100);
}