private void MoveRobotTo(RobotCommand direction, Point destPos)
{
CellType destType = Cell.At(destPos);
if (!destType.IsTraversible())
{
throw new InvalidMoveException(RobotPosition, destPos);
}
if (!destType.IsEmpty())
{
IsChanged = true;
}
if (destType.IsRock())
{
if (direction == RobotCommand.Left && Cell.At(destPos.Left()).IsEmpty())
{
Cell.Set(destPos.Left(), destType);
Rocks.Remove(destPos);
Rocks.Add(destPos.Left());
if (destType.IsHoRock())
{
HoRocks.Remove(destPos);
HoRocks.Add(destPos.Left());
}
}
else if (direction == RobotCommand.Right && Cell.At(destPos.Right()).IsEmpty())
{
Cell.Set(destPos.Right(), destType);
Rocks.Remove(destPos);
Rocks.Add(destPos.Right());
if (destType.IsHoRock())
{
HoRocks.Remove(destPos);
HoRocks.Add(destPos.Right());
}
}
else
{
throw new InvalidMoveException(RobotPosition, destPos);
}
}
if (destType.IsLambda())
{
Lambdas.Remove(destPos);
Score += 25;
LambdasCollected++;
}
if (destType.IsOpenLift())
{
State = MapState.Won;
Score += LambdasCollected * 50 - 1; // minus one point for the final move
}
if (destType.IsTrampoline())
{
Cell.Set(destPos, CellType.Empty);
destPos = Trampolines[destPos];
// remove all trampolines that have the same target
var remove = new List <Point>();
foreach (var trampoline in Trampolines)
{
if (trampoline.Value == destPos)
{
Cell.Set(trampoline.Key, CellType.Empty);
remove.Add(trampoline.Key);
}
}
foreach (Point point in remove)
{
Trampolines.Remove(point);
}
}
if (destType.IsRazor())
{
RazorCount++;
Razors.Remove(destPos);
}
Cell.Set(RobotPosition, CellType.Empty);
Cell.Set(destPos, CellType.Robot);
RobotPosition = destPos;
}