private static void GetWinterBoardMovesDisbandsOnlyRecursive(Board originalBoard, BoardMove workingBoardMove, IEnumerable <UnitMove> availableMoves, HashSet <BoardMove> completedBoardMoves, PowersDictionary <int> buildDisbandCounts, int minMoves)
{
if (workingBoardMove.Count == minMoves)
{
completedBoardMoves.Add(workingBoardMove.Clone());
return;
}
var moveGrouping = availableMoves.ToLookup(um => um.Unit.Power);
Powers power = availableMoves.First().Unit.Power;
IEnumerable <UnitMove> remainingMoves;
foreach (UnitMove unitMove in moveGrouping[power])
{
if (workingBoardMove.Count(um => um.Unit.Power == power) == Math.Abs(buildDisbandCounts[power]))
{
remainingMoves = availableMoves.Where(um => um.Unit.Power != power);
}
else
{
remainingMoves = availableMoves.Where(um => um != unitMove);
}
BoardMove newBoardMove = workingBoardMove.Clone();
newBoardMove.Add(unitMove);
GetWinterBoardMovesDisbandsOnlyRecursive(originalBoard, newBoardMove, remainingMoves, completedBoardMoves, buildDisbandCounts, minMoves);
}
}
public IEnumerable <BoardMove> GetBoardMovesWinter(Board board, AllianceScenario allianceScenario)
{
if (!(board.Season is Winter))
{
throw new Exception($"Bad season {board.Season}");
}
List <UnitMove> winterUnitMoves = board.GetUnitMoves();
if (!winterUnitMoves.Any())
{
return(Enumerable.Empty <BoardMove>());
}
var buildDisbandCounts = board.GetBuildAndDisbandCounts();
BoardMove workingMove = new BoardMove();
List <Powers> completedPowers = new List <Powers>();
foreach (UnitMove unitMove in winterUnitMoves.Where(um => !completedPowers.Contains(um.Unit.Power)))
{
Powers currentPower = unitMove.Unit.Power;
if (workingMove.CurrentlyAllowsWinter(unitMove, buildDisbandCounts[currentPower]))
{
workingMove.Add(unitMove);
if (workingMove.Count(um => um.Unit.Power == currentPower) == Math.Abs(buildDisbandCounts[currentPower]))
{
completedPowers.Add(currentPower);
}
}
}
if (buildDisbandCounts.Count(kvp => kvp.Value != 0) != completedPowers.Count)
{
throw new Exception("Looks like I created an incomplete move");
}
workingMove.FillHolds(board);
return(new List <BoardMove>()
{
workingMove
});
}