public SurfacePosition Move(SurfacePosition position, SurfaceDirection direction)
{
if (IsLost(position, direction))
{
throw new RobotLostException();
}
var newPosition = new SurfacePosition(position.Row, position.Column);
switch (direction)
{
case SurfaceDirection.Up:
newPosition.Row++;
break;
case SurfaceDirection.Left:
newPosition.Column--;
break;
case SurfaceDirection.Down:
newPosition.Row--;
break;
case SurfaceDirection.Right:
newPosition.Column++;
break;
default:
throw new ArgumentException(nameof(direction), "Direction is not supported: " + direction);
}
return(newPosition);
}
public bool IsValidPosition(SurfacePosition position)
{
return(position.Row >= 0 &&
position.Column >= 0 &&
position.Row < _rowsCount &&
position.Column < _columnsCount);
}
private bool IsLost(SurfacePosition position, SurfaceDirection direction)
{
if (position.Column == 0 && direction == SurfaceDirection.Left)
{
_leftColumnRobotScents[position.Row] = true;
return(true);
}
else if (position.Column == _columnsCount - 1 && direction == SurfaceDirection.Right)
{
_rightColumnRobotScents[position.Row] = true;
return(true);
}
else if (position.Row == 0 && direction == SurfaceDirection.Down)
{
_bottomRowRobotScents[position.Column] = true;
return(true);
}
else if (position.Row == _rowsCount - 1 && direction == SurfaceDirection.Up)
{
_upperRowRobotScents[position.Column] = true;
return(true);
}
return(false);
}
public bool IsDeadScentMovement(SurfacePosition position, SurfaceDirection direction)
{
if (position.Column == 0 && direction == SurfaceDirection.Left)
{
return(_leftColumnRobotScents[position.Row]);
}
else if (position.Column == _columnsCount - 1 && direction == SurfaceDirection.Right)
{
return(_rightColumnRobotScents[position.Row]);
}
else if (position.Row == 0 && direction == SurfaceDirection.Down)
{
return(_bottomRowRobotScents[position.Column]);
}
else if (position.Row == _rowsCount - 1 && direction == SurfaceDirection.Up)
{
return(_upperRowRobotScents[position.Column]);
}
return(false);
}
