public int GetPart1ManhattanDistance()
{
var shipCoordinates = new Point(0, 0);
var currentDirection = ShipDirection.Direction.East;
foreach (IInstruction instruction in Instructions)
{
if (instruction is IDirection)
{
IDirection direction = instruction as IDirection;
Point newCoordinate = direction.Execute();
shipCoordinates.X += newCoordinate.X;
shipCoordinates.Y += newCoordinate.Y;
}
if (instruction is IMovement)
{
IMovement movement = instruction as IMovement;
Point newCoordinate = movement.Part1Execute(currentDirection);
shipCoordinates.X += newCoordinate.X;
shipCoordinates.Y += newCoordinate.Y;
}
if (instruction is IRotation)
{
IRotation rotation = instruction as IRotation;
currentDirection = rotation.Part1Execute(currentDirection);
}
}
return(Math.Abs(shipCoordinates.X) + Math.Abs(shipCoordinates.Y));
}
