/// <summary>
/// Attempt to play the chosen card for the user according to the rules
/// of the game.
/// </summary>
/// <param name="cardNum"> Card's index in hand</param>
/// <param name="chosenSuit">Suit if the card is eight</param>
/// <returns>Return the action according to the rules</returns>
public static ActionResult UserPlayCard(int cardNum, Suit?chosenSuit = null)
{
Card cardPlayed = UserHand.GetCard(cardNum);
Suit newSuit = chosenSuit == null?cardPlayed.GetSuit() : (Suit)chosenSuit;
if (!IsPlaying || !IsUserTurn)
{
throw new Exception();
}
if (cardPlayed.GetFaceValue() == FaceValue.Eight && chosenSuit == null)
{
return(ActionResult.SuitRequired);
}
return(PlayCard(UserHand, cardNum, newSuit, ComputerHand));
}