/// <summary>
/// The method to calculate the score of a frame.
/// </summary>
/// <returns>integer Score of the frame</returns>
/// <exception cref="FrameNotReadyToScoreException">FrameNotReadyToScoreException</exception>
public virtual int CalculateScore()
{
int score = (null != PreviousFrame) ? PreviousFrame.FrameScore : 0;
if (IsReadyToScore)
{
//In this case the score is being calculated for a full frame of balls.
if (BallScores.Count == CommonFrame.BallCount)
{
score += BowlingNumber.Sum(BallScores[0], BallScores[1]);
//If the ball made a spare then the next ball also needs to be added to the ball.
if (IsSpare(BallScores))
{
//find the next ball
BowlingNumber nextBall = (null != NextTwoFrames && null != NextTwoFrames[0].BallScores) ? NextTwoFrames[0].BallScores[0] : null;
if (null != nextBall)
{
score += nextBall.Value;
}
}
}
else
{
//In this case the frame is finished in the first frame.
///<TODO>
/// Not required for this release however It could be interesting to check how this would work in a higher number of ballCount.
/// </TODO>
if (BallScores.Count == 1)
{
score += BallScores[0].Value;
if (BallScores[0].IsStrike())
{
//find the next two balls and add the scores.
BowlingNumber nextBall = (null != NextTwoFrames && null != NextTwoFrames[0].BallScores) ? NextTwoFrames[0].BallScores[0] : null;
score += null != nextBall ? nextBall.Value : 0;
if ((null != NextTwoFrames && (null != NextTwoFrames[0].BallScores || null != NextTwoFrames[1].BallScores)))
{
BowlingNumber nextNextBall = (NextTwoFrames[0].BallScores.Count == 1) ? NextTwoFrames[1].BallScores[0] : NextTwoFrames[0].BallScores[1];
score += nextNextBall.Value;
}
}
}
}
FrameScore = score;
return(FrameScore);
}
else
{
throw new FrameNotReadyToScoreException("Frame is not ready to be scored. Please continue to bowl.");
}
}
/// <summary>
/// confirms a strike. Also known as all pins are down with only one ball thrown.
/// </summary>
/// <returns>true for all pins down and false for any other value.</returns>
public bool IsStrike()
{
return(BowlingNumber.Sum(this, this) / 2 == Constant.NUMBER_OF_PINS);
}
/// <summary>
/// Confirm if a frame is a spare.
/// </summary>
/// <param name="ballScores">The BowlingNumber list of scores for the frame.</param>
/// <returns>True when the balls scores are a spare, otherwise false.</returns>
public bool IsSpare(List <BowlingNumber> ballScores)
{
return(BallScores.Count == 2 && BowlingNumber.Sum(BallScores[0], BallScores[1]) == Constant.NUMBER_OF_PINS);
}