package polaris.sdk.ui.samples;

import polaris.sdk.ui.*;
import polaris.sdk.ui.controls.*;
import static polaris.sdk.ui.samples.SceneSupport.*;

/** Six stateful, reusable application scenes made with existing LiquidGlass UI controls. */
public final class SceneExamples extends Panel {
 public static final String[] IDS={"food","chat","client","music","settings","files"};
 public static final String[] TITLES={"外卖点餐","即时聊天","外挂面板","音乐播放","系统设置","文件管理"};
 private final ButtonGroup selector=new ButtonGroup(TITLES);
 private final Label note=caption("同一套控件，不同的生活场景。各示例数据仅保存在当前窗口。");
 private final SceneSupport.AppScene[] scenes=new SceneSupport.AppScene[IDS.length];
 private SceneSupport.AppScene active;private int selected;
 public SceneExamples(){glass(false);padding(0);gap(Spacing.GAP);clipChildren(false);id("sceneExamples");
  mount(this,selector,"scene.selector");mount(this,note,"scene.note");
  for(int i=0;i<IDS.length;i++)selector.children().get(i).id("scene.tab."+IDS[i]);
  selector.onChange(v->select(selector.selectedIndex()));select(0);
 }
 public int selectedIndex(){return selected;}
 public Widget selectedScene(){return active;}
 public Widget scene(int index){if(index<0||index>=IDS.length)throw new IllegalArgumentException("scene index");if(scenes[index]==null){switch(index){case 0:scenes[index]=new FoodScene();break;case 1:scenes[index]=new ChatScene();break;case 2:scenes[index]=new ClientScene();break;case 3:scenes[index]=new MusicScene();break;case 4:scenes[index]=new SettingsScene();break;case 5:scenes[index]=new FilesScene();break;default:throw new AssertionError();}}return scenes[index];}
 public void select(int index){if(index<0||index>=IDS.length)throw new IllegalArgumentException("scene index");
  if(active!=null&&selected==index){if(selector.selectedIndex()!=index)selector.select(index);return;}
  if(active!=null)remove(active);selected=index;active=(SceneSupport.AppScene)scene(index);add(active);active.appear();
  if(selector.selectedIndex()!=index)selector.select(index);changed();
 }
 public static int indexOf(String id){for(int i=0;i<IDS.length;i++)if(IDS[i].equalsIgnoreCase(id))return i;try{int i=Integer.parseInt(id);if(i>=0&&i<IDS.length)return i;}catch(NumberFormatException ignored){}throw new IllegalArgumentException("Scene must be food, chat, client, music, settings, files or 0..5");}
 @Override protected void layoutChildren(){
  place(selector,0,0,w,44);place(note,0,58,w,22);float needed=active.preferredHeight(w);place(active,0,98,w,needed);h=98+needed;
 }
}