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@Route(value = "path", layout = MainView.class)
@PageTitle("路径规划")
public class PathView extends VerticalLayout {

    @Autowired
    private PathService pathService;

    public PathView() {
        TextField start = new TextField();
        TextField end = new TextField();
        HorizontalLayout path = new HorizontalLayout();
        path.add(start, end);
        Button pathCalculate = new Button("calculate path");

        VerticalLayout result = new VerticalLayout();
        TextField transferNum = new TextField();
        TextField distance = new TextField();
        Text stations = new Text("");
        result.add(
                new H3("换乘数: "),
                transferNum,
                new H3("总距离 :"),
                distance,
                new H3("途径站点详情:"),
                stations
        );

        pathCalculate.addClickListener(click -> {
            PathInfoVO pathResult = pathService.getPath(start.getValue(), end.getValue());
            System.out.println(pathResult);
            stations.setText(StringUtils.join(pathResult.getDetail(), ","));
            transferNum.setValue(String.valueOf(pathResult.getTransferNum()));
            distance.setValue(String.valueOf(pathResult.getDistance()));
        });

        add(
                new Text("hello world"),
                path,
                pathCalculate,
                result
        );
    }
}