private IEnumerable <SingleGameMove> SingleMoveOptions(int diceRoll, GameColor player)
{
if (this.EatenDisksExist(player))
{
int destinationColumnIndex = player.RelativeColumnIndex(diceRoll);
var destinationColumn = this[destinationColumnIndex];
if (destinationColumn.Color == player || destinationColumn.IsEmpty)
{
yield return(new RemoveEatenDisk(destinationColumnIndex));
}
else if (destinationColumn.NumOfDisks == 1)
{
yield return(new RemoveEatenDiskEats(destinationColumnIndex));
}
}
else
{
bool canAquit = true;
for (int columnIndex = 0; columnIndex <= 23 - diceRoll; columnIndex++)
{
int sourceColumnIndex = player.RelativeColumnIndex(columnIndex);
var sourceColumn = this[sourceColumnIndex];
if (sourceColumn.NumOfDisks > 0 && sourceColumn.Color == player)
{
canAquit = false;
int destinationColumnIndex = player.RelativeColumnIndex(columnIndex + diceRoll);
var destinationColumn = this[destinationColumnIndex];
if (destinationColumn.IsEmpty || destinationColumn.Color == player)
{
yield return(new RegularMove(sourceColumnIndex, destinationColumnIndex));
}
else if (destinationColumn.NumOfDisks == 1)
{
yield return(new EatDisk(sourceColumnIndex, destinationColumnIndex));
}
}
}
if (canAquit)
{
int columnIndex = 24 - diceRoll;
while (true)
{
int relativeColumn = player.RelativeColumnIndex(columnIndex);
var column = this[relativeColumn];
if (column.NumOfDisks > 0 && column.Color == player)
{
yield return(new AcquitDisk(relativeColumn));
break;
}
columnIndex++;
}
}
}
}
