public MarsRobot(int x, int y, RobotDirection direction)
{
_coordinates = new MarsCoordinates(x, y);
_direction = direction;
if (_direction == RobotDirection.Unknown)
{
throw new ArgumentException("Invalid direction");
}
}
private void Move(MarsGrid grid)
{
var previousPosition = _coordinates;
if (grid.HasScent(_coordinates, _direction))
{
return;
}
switch (_direction)
{
case RobotDirection.North:
_coordinates.PositionY++;
break;
case RobotDirection.South:
_coordinates.PositionY--;
break;
case RobotDirection.East:
_coordinates.PositionX++;
break;
case RobotDirection.West:
_coordinates.PositionX--;
break;
default: throw new ArgumentException("Invalid robot direction");
}
;
if (_coordinates.PositionX > grid.MaxX ||
_coordinates.PositionX < grid.MinX ||
_coordinates.PositionY > grid.MaxY ||
_coordinates.PositionY < grid.MinY)
{
_lost = true;
_coordinates = previousPosition;
grid.AddScent(_coordinates, _direction);
}
}
public bool HasScent(MarsCoordinates coordinates, RobotDirection direction)
{
return(Scents.Contains(new Scent(coordinates, direction)));
}
public Scent(MarsCoordinates coordinates, RobotDirection direction)
{
Coordinates = coordinates;
Direction = direction;
}
public void AddScent(MarsCoordinates coordinates, RobotDirection direction)
{
Scents.Add(new Scent(coordinates, direction));
}
