/// <summary>
/// Tries the move all cards to appropriate foundations.
/// </summary>
public void TryMoveAllCardsToAppropriateFoundations()
{
// Go through the top card in each tableau - keeping
// track of whether we moved one.
var keepTrying = true;
while (keepTrying)
{
var movedACard = false;
if (Waste.Count > 0)
{
if (TryMoveCardToAppropriateFoundation(Waste.Last()))
{
movedACard = true;
}
}
foreach (var tableau in _tableaus.Where(tableau => tableau.Count > 0)
.Where(tableau => TryMoveCardToAppropriateFoundation(tableau.Last())))
{
movedACard = true;
}
// We'll keep trying if we moved a card.
keepTrying = movedACard;
}
}
/// <summary>
/// Turns cards from the stock into the waste.
/// </summary>
private void DoTurnStock()
{
// If the stock is empty, put every card from the waste back into the stock.
if (Stock.Count == 0)
{
foreach (var card in Waste)
{
card.IsFaceDown = true;
card.IsPlayable = false;
Stock.Insert(0, card);
}
Waste.Clear();
}
else
{
// Everything in the waste so far must now have no offset.
foreach (var wasteCard in Waste)
{
wasteCard.FaceUpOffset = 0;
}
if (Stock.Count > 0)
{
var card = Stock.Last();
Stock.Remove(card);
card.IsFaceDown = false;
card.IsPlayable = false;
card.FaceUpOffset = 30;
Waste.Add(card);
}
}
// Everything in the waste must be not playable,
// apart from the top card.
foreach (var wasteCard in Waste)
{
wasteCard.IsPlayable = wasteCard == Waste.Last();
}
}
/// <summary>
/// Moves the card.
/// </summary>
/// <param name="from">The set we're moving from.</param>
/// <param name="to">The set we're moving to.</param>
/// <param name="card">The card we're moving.</param>
/// <param name="checkOnly">if set to <c>true</c> we only check if we CAN move, but don't actually move.</param>
/// <returns>True if a card was moved.</returns>
public bool MoveCard(ObservableCollection <PlayingCard> from,
ObservableCollection <PlayingCard> to,
PlayingCard card, bool checkOnly)
{
// The trivial case is where from and to are the same.
if (from == to)
{
return(false);
}
// This is the complicated operation.
int scoreModifier = 0;
// Are we moving from the waste?
if (from == Waste)
{
// Are we moving to a foundation?
if (foundations.Contains(to))
{
// We can move to a foundation only if:
// 1. It is empty and we are an ace.
// 2. It is card SN and we are suit S and Number N+1
if ((to.Count == 0 && card.Value == 0) ||
(to.Count > 0 && to.Last().Suit == card.Suit && (to.Last()).Value == (card.Value - 1)))
{
// Move from waste to foundation.
scoreModifier = 10;
}
else
{
return(false);
}
}
// Are we moving to a tableau?
else if (tableaus.Contains(to))
{
// We can move to a tableau only if:
// 1. It is empty and we are a king.
// 2. It is card CN and we are color !C and Number N-1
if ((to.Count == 0 && card.Value == 12) ||
(to.Count > 0 && to.Last().Colour != card.Colour && (to.Last()).Value == (card.Value + 1)))
{
// Move from waste to tableau.
scoreModifier = 5;
}
else
{
return(false);
}
}
// Any other move from the waste is wrong.
else
{
return(false);
}
}
// Are we moving from a tableau?
else if (tableaus.Contains(from))
{
// Are we moving to a foundation?
if (foundations.Contains(to))
{
// We can move to a foundation only if:
// 1. It is empty and we are an ace.
// 2. It is card SN and we are suit S and Number N+1
if ((to.Count == 0 && card.Value == 0) ||
(to.Count > 0 && to.Last().Suit == card.Suit && (to.Last()).Value == (card.Value - 1)))
{
// Move from tableau to foundation.
scoreModifier = 10;
}
else
{
return(false);
}
}
// Are we moving to another tableau?
else if (tableaus.Contains(to))
{
// We can move to a tableau only if:
// 1. It is empty and we are a king.
// 2. It is card CN and we are color !C and Number N-1
if ((to.Count == 0 && card.Value == 12) ||
(to.Count > 0 && to.Last().Colour != card.Colour && (to.Last()).Value == (card.Value + 1)))
{
// Move from tableau to tableau.
scoreModifier = 0;
}
else
{
return(false);
}
}
// Any other move from a tableau is wrong.
else
{
return(false);
}
}
// Are we moving from a foundation?
else if (foundations.Contains(from))
{
// Are we moving to a tableau?
if (tableaus.Contains(to))
{
// We can move to a tableau only if:
// 1. It is empty and we are a king.
// 2. It is card CN and we are color !C and Number N-1
if ((to.Count == 0 && card.Value == 12) ||
(to.Count > 0 && to.Last().Colour != card.Colour && (to.Last()).Value == (card.Value + 1)))
{
// Move from foundation to tableau.
scoreModifier = -15;
}
else
{
return(false);
}
}
// Are we moving to another foundation?
else if (foundations.Contains(to))
{
// We can move from a foundation to a foundation only
// if the source foundation has one card (the ace) and the
// destination foundation has no cards).
if (from.Count == 1 && to.Count == 0)
{
// The move is valid, but has no impact on the score.
scoreModifier = 0;
}
else
{
return(false);
}
}
// Any other move from a foundation is wrong.
else
{
return(false);
}
}
else
{
return(false);
}
// If we were just checking, we're done.
if (checkOnly)
{
return(true);
}
// If we've got here we've passed all tests
// and move the card and update the score.
DoMoveCard(from, to, card);
Score += scoreModifier;
Moves++;
// If we have moved from the waste, we must
// make sure that the top of the waste is playable.
if (from == Waste && Waste.Count > 0)
{
Waste.Last().IsPlayable = true;
}
// Check for victory.
CheckForVictory();
return(true);
}
/// <summary>
/// Moves the card.
/// </summary>
/// <param name="from">The set we're moving from.</param>
/// <param name="to">The set we're moving to.</param>
/// <param name="cardViewModel">The card we're moving.</param>
/// <param name="checkOnly">if set to <c>true</c> we only check if we CAN move, but don't actually move.</param>
/// <returns>True if a card was moved.</returns>
public bool MoveCard(
ObservableCollection <PlayingCardViewModel> from,
ObservableCollection <PlayingCardViewModel> to,
PlayingCardViewModel cardViewModel, bool checkOnly)
{
// The trivial case is where from and to are the same.
if (from == to)
{
return(false);
}
// Are we moving from the waste?
if (from == Waste)
{
// Are we moving to a foundation?
if (_foundations.Contains(to))
{
// We can move to a foundation only if:
// 1. It is empty and we are an ace.
// 2. It is card SN and we are suit S and Number N+1
if ((to.Count != 0 || cardViewModel.Value != 0) &&
(to.Count <= 0 || to.Last().Suit != cardViewModel.Suit || to.Last().Value != cardViewModel.Value - 1))
{
return(false);
}
}
// Are we moving to a tableau?
else if (_tableaus.Contains(to))
{
// We can move to a tableau only if:
// 1. It is empty and we are a king.
// 2. It is card CN and we are color !C and Number N-1
if ((to.Count != 0 || cardViewModel.Value != 12) &&
(to.Count <= 0 || to.Last().Colour == cardViewModel.Colour || to.Last().Value != cardViewModel.Value + 1))
{
return(false);
}
}
// Any other move from the waste is wrong.
else
{
return(false);
}
}
// Are we moving from a tableau?
else if (_tableaus.Contains(from))
{
// Are we moving to a foundation?
if (_foundations.Contains(to))
{
// We can move to a foundation only if:
// 1. It is empty and we are an ace.
// 2. It is card SN and we are suit S and Number N+1
if ((to.Count != 0 || cardViewModel.Value != 0) &&
(to.Count <= 0 || to.Last().Suit != cardViewModel.Suit || to.Last().Value != cardViewModel.Value - 1))
{
return(false);
}
}
// Are we moving to another tableau?
else if (_tableaus.Contains(to))
{
// We can move to a tableau only if:
// 1. It is empty and we are a king.
// 2. It is card CN and we are color !C and Number N-1
if ((to.Count != 0 || cardViewModel.Value != 12) &&
(to.Count <= 0 || to.Last().Colour == cardViewModel.Colour || to.Last().Value != cardViewModel.Value + 1))
{
return(false);
}
}
// Any other move from a tableau is wrong.
else
{
return(false);
}
}
// Are we moving from a foundation?
else if (_foundations.Contains(from))
{
// Are we moving to a tableau?
if (_tableaus.Contains(to))
{
// We can move to a tableau only if:
// 1. It is empty and we are a king.
// 2. It is card CN and we are color !C and Number N-1
if ((to.Count != 0 || cardViewModel.Value != 12) &&
(to.Count <= 0 || to.Last().Colour == cardViewModel.Colour || to.Last().Value != cardViewModel.Value + 1))
{
return(false);
}
}
// Are we moving to another foundation?
else if (_foundations.Contains(to))
{
// We can move from a foundation to a foundation only
// if the source foundation has one card (the ace) and the
// destination foundation has no cards).
if (from.Count != 1 || to.Count != 0)
{
return(false);
}
}
// Any other move from a foundation is wrong.
else
{
return(false);
}
}
else
{
return(false);
}
// If we were just checking, we're done.
if (checkOnly)
{
return(true);
}
// If we've got here we've passed all tests
// and move the card and update the score.
DoMoveCard(from, to, cardViewModel);
// If we have moved from the waste, we must
// make sure that the top of the waste is playable.
if (from == Waste && Waste.Count > 0)
{
Waste.Last().IsPlayable = true;
}
// Check for victory.
CheckForVictory();
return(true);
}