package MovementStrategy;

public abstract class AbstractStrategy {
    private IMoveableObject _moveableObject;
    private StrategyStatus _state = StrategyStatus.NotInit;
    protected int FieldWidth;
    protected int FieldHeight;
    public StrategyStatus GetStatus() { return _state; }
    public void SetData(IMoveableObject moveableObject, int width, int height)
    {
        if (moveableObject == null)
        {
            _state = StrategyStatus.NotInit;
            return;
        }
        _state = StrategyStatus.InProgress;
        _moveableObject = moveableObject;
        FieldWidth = width;
        FieldHeight = height;
    }
    public void MakeStep()
    {
        if (_state != StrategyStatus.InProgress)
        {
            return;
        }
        if (IsTargetDestinaion())
        {
            _state = StrategyStatus.Finish;
            return;
        }
        MoveToTarget();
    }
    protected boolean MoveLeft() { return MoveTo(MovementDirection.Left);}
    protected boolean MoveRight() { return MoveTo(MovementDirection.Right);}
    protected boolean MoveUp() { return MoveTo(MovementDirection.Up);}
    protected boolean MoveDown() { return MoveTo(MovementDirection.Down);}
    protected ObjectParameters GetObjectParameters(){ return _moveableObject.GetObjectPosition();}
    protected Integer GetStep()
    {
        if (_state != StrategyStatus.InProgress)
        {
            return null;
        }
        return _moveableObject.GetStep();
    }
    protected abstract void MoveToTarget();
    protected abstract boolean IsTargetDestinaion();
    private boolean MoveTo(MovementDirection movementDirection)
    {
        if (_state != StrategyStatus.InProgress)
        {
            return false;
        }
        if (_moveableObject.TryMoveObject(movementDirection))
            return true;
        else
            return false;
    }
}