/* Define variables
 ************************************/
// Sensor threshold to tell us if ball is moving
// (usually does not break 10, but let's make it 15 to be safe)
int sensorThreshold = 4;

// Analog inputs
int analogOne = 1;

// LEDs
int ledPin1 = 9;

// Readings from the sensor
int sensorValue1 = 0;
int prevSensorValue1 = sensorThreshold;

// Brightness of the LED
int brightness = 0;

// Was the ball hit?
//boolean wasHit1 = false;
int wasHit1 = 0;

// We need to save 5 readings so we can check
// if there are at least 5 zeros in a row
int readings[5];
int total = 0;
int average = 0;
int numReadings = 0;
int totalReadings = 5;
int index = 0;

void setup() {
  // start serial port at 9600 bps:
  Serial.begin(9600);
  pinMode(ledPin1, OUTPUT);

  // Set up our readings array
  for (int i=0; i< totalReadings; i++) {
    readings[i] = 0;
  }
}

void loop() {

  // Read analog input:
  sensorValue1 = analogRead(analogOne);
  Serial.print("Sensor 1: ");
  Serial.print(sensorValue1, DEC);
  Serial.print("\n\r");

  // If the sensor value is greater than our threshold
  // and the ball was not previously hit, light up the LED
  if (sensorValue1 >= sensorThreshold && wasHit1 == 0) {
    wasHit1 = 1;

    // Fade the LED
    for(int fadeValue = 255; fadeValue >= 0; fadeValue -=5) {
      // sets the value (range from 0 to 255):
      analogWrite(ledPin1, fadeValue);
      // wait for 30 milliseconds to see the dimming effect
      delay(30);
    }
  }
  else if (sensorValue1 >= sensorThreshold && wasHit1 == 1) {
    // Do nothing
  }
  else if (sensorValue1 < sensorThreshold) {
    // Do nothing
  }

  if (wasHit1 == 1) {
    //analogWrite(ledPin1, 0);
    // Let's grab the sensor readings and average them
    if (numReadings < totalReadings) {
      readings[index] = sensorValue1;

      for (int i=0; i<numReadings; i++) {
        total += readings[i];
      }

      numReadings += 1;
      index += 1;

    }
    else if (numReadings == totalReadings) {
      average = total/numReadings;
      if (average < 1) {
        wasHit1 = 0;
      }
      average = 0;
      numReadings = 0;
      total = 0;
    }

  }

  Serial.print("Was the ball hit: ");
  Serial.print(wasHit1);
  Serial.print("\n\r");
  Serial.print("Total: ");
  Serial.print(total);
  Serial.print("\n\r");

  delay(100);
}