/// <summary>
/// Performs a valid move on the board
/// </summary>
/// <param name="selected">marbles that are selected</param>
/// <param name="direction">direction of push movement</param>
/// <returns></returns>
public bool DoMove(List <Marble> selected, Direction direction)
{
if (Rules.MoveIsValid(this, selected, direction))
{
MoveType mt = Rules.DetermineMoveType(selected, direction);
if (mt == MoveType.Line)
{
Marble current = selected[0];
while (current != null)
{
Marble next = null;
//get marble at the destination location of current marble
ICoordinates nc = Rules.NextCoordinates(current.Coordinates, direction);
next = GetMarble(nc, false);
//move the current marble afterwards, to prevent two marbles at same location
current.Move(direction);
if (current.IsOut)
{
//marble was thrown out, get the direction of r
direction = Rules.ConvertDirection(current.Coordinates as OuterRingCoordinates, direction);
}
//repeat until there is no marble left in the line
current = next;
}
return(true);
}
else if (mt == MoveType.Broad)
{
//simply move all selected marbles in the desired direction
foreach (Marble m in selected)
{
m.Move(direction);
}
return(true);
}
}
return(false);
}
/// <summary>
/// Determines if a turn of a player may be valid
/// </summary>
/// <param name="selected"></param>
/// <param name="direction"></param>
/// <returns></returns>
public static bool MoveIsValid(Board board, List <Marble> selected, Direction direction)
{
if (direction == Direction.None)
{
return(false);
}
MoveType mt = DetermineMoveType(selected, direction);
if (mt == MoveType.Line)
{
MarbleColor currentPlayer = selected[0].Color;
List <MarbleColor> moveline = new List <MarbleColor>();
foreach (Marble m in selected)
{
moveline.Add(m.Color);
}
Marble next = selected[selected.Count - 1];
while (next != null)
{
next = board.GetMarble(NextCoordinates(next.Coordinates, direction), true);
if (next != null)
{
moveline.Add(next.Color);
}
}
int i = 0, mcol = 0, hcol = 0, ncol = 0;
while (i < moveline.Count && moveline[i] == currentPlayer)
{
mcol++;
i++;
}
while (i < moveline.Count && moveline[i] != currentPlayer)
{
hcol++;
i++;
}
while (i < moveline.Count && moveline[i] == currentPlayer)
{
ncol++;
i++;
}
// move max. three own marbles; push fewer amount of enemy marbles than own
// and have no other own marbles behind them
return(mcol <= 3 && mcol > hcol && ncol == 0);
}
else if (mt == MoveType.Broad)
{
// move max. three marbles; all destination slots must be free
bool free = selected.Count < 4;
if (free)
{
foreach (Marble m in selected)
{
ICoordinates dest = NextCoordinates(m.Coordinates, direction);
free = free && board.GetMarble(dest, true) == null;
}
}
return(free);
}
return(false);
}
