public Ship(Func <ISet <IZoneInfo> > getZoneInfosFunc, IZoneInfo currentPosition, int speedInMilliseconds, int maxDistance)
: base(getZoneInfosFunc, currentPosition)
{
SpeedInMilliseconds = speedInMilliseconds;
_pathEnumeratorTask = new Task <IEnumerator <ShipPathNode> >(() =>
{
var pathNode = new ShipPathNode(CurrentPosition, maxDistance);
var enumerator = pathNode
.EnumerateAllChildPathNodes()
.Where(x => x.Distance < maxDistance)
.GroupBy(x => CalculateDistance(CurrentPosition.Point, x.CurrentZoneInfo.Point))
.OrderByDescending(x => x.Key)
.FirstOrDefault()
?.OrderBy(x => x.Distance)
?.FirstOrDefault()
?.EnumeratePathBackwards()
?.GetEnumerator() ?? new List <ShipPathNode>()
{
pathNode
}.GetEnumerator();
enumerator.MoveNext();
return(enumerator);
});
_pathEnumeratorTask.Start();
}
private ShipPathNode(
IZoneInfo rootZoneInfo,
IZoneInfo currentZoneInfo,
ShipPathNode preceedingShipPathNode,
ISet <IZoneInfo> seenPaths,
int distance,
int maxDistance
)
{
_maxDistance = maxDistance;
if (rootZoneInfo == null)
{
throw new ArgumentNullException(nameof(rootZoneInfo));
}
_rootZoneInfo = rootZoneInfo;
if (currentZoneInfo == null)
{
throw new ArgumentNullException(nameof(currentZoneInfo));
}
CurrentZoneInfo = currentZoneInfo;
if (!seenPaths.Add(currentZoneInfo))
{
throw new ArgumentException("'currentZoneInfo' was already added to this path.", nameof(currentZoneInfo));
}
_preceedingShipPathNode = preceedingShipPathNode;
Distance = distance;
_childrenLazy = new Lazy <IEnumerable <ShipPathNode> >(() => CurrentZoneInfo
.GetNorthEastSouthWest()
.Where(x => Distance + 1 < maxDistance)
.Where(x => x.HasMatch)
.Where(x => _preceedingShipPathNode != null ? x.MatchingObject != _preceedingShipPathNode.CurrentZoneInfo : true)
.Where(x => !seenPaths.Contains(x.MatchingObject))
.Where(x => IsSuitableForShip(x.MatchingObject))
.OrderByDescending(x => CalculateDistance(x.MatchingObject.Point, _rootZoneInfo.Point))
.Where(x => !seenPaths.Contains(x.MatchingObject))
.Select(x =>
new ShipPathNode(
rootZoneInfo: rootZoneInfo,
currentZoneInfo: x.MatchingObject,
preceedingShipPathNode: this,
seenPaths: seenPaths,
distance: Distance + 1,
maxDistance: _maxDistance
)
)
);
}
