public abstract class AbstractStrategy {
    private IMoveableObject moveableObject;
    private Status state = Status.NotInit;
    private int fieldWidth;
    protected int getFieldWidth() {
        return fieldWidth;
    }
    private int fieldHeight;
    protected int getFieldHeight() {
        return fieldHeight;
    }
    public Status getStatus() {
        return state;
    }
    public void setData(IMoveableObject moveableObject, int width, int height) {
        if (moveableObject == null) {
            state = Status.NotInit;
            return;
        }
        state = Status.InProgress;
        this.moveableObject = moveableObject;
        fieldWidth = width;
        fieldHeight = height;
    }
    public void makeStep() {
        if (state != Status.InProgress) {
            return;
        }
        if (isTargetDestination()) {
            state = Status.Finish;
            return;
        }
        moveToTarget();
    }
    protected boolean moveLeft() {
        return moveTo(DirectionBulldozer.Left);
    }
    protected boolean moveRight() {
        return moveTo(DirectionBulldozer.Right);
    }
    protected boolean moveUp() {
        return moveTo(DirectionBulldozer.Up);
    }
    protected boolean moveDown() {
        return moveTo(DirectionBulldozer.Down);
    }
    protected ObjectParameters getObjectParameters() {
        if (moveableObject == null) {
            return null;
        }
        return moveableObject.getObjectsPosition();
    }
    protected Integer getStep() {
        if (state != Status.InProgress) {
            return null;
        }
        if (moveableObject == null) {
            return null;
        }
        return moveableObject.getStep();
    }
    protected abstract void moveToTarget();
    protected abstract boolean isTargetDestination();
    private boolean moveTo(DirectionBulldozer directionBulldozer) {
        if (state != Status.InProgress) {
            return false;
        }
        if (moveableObject == null) {
            return false;
        }
        if (moveableObject.checkCanMove(directionBulldozer)) {
            moveableObject.moveObject(directionBulldozer);
            return true;
        }
        return false;
    }
}