┌─────────────────────────────────────┐
│  Tenant Layer (租户级覆盖)           │  ← 业务定制：品牌色、合规水印、专属组件
├─────────────────────────────────────┤
│  Industry Layer (行业级基线)         │  ← 领域标准：金融双录、医疗分屏、教育互动
├─────────────────────────────────────┤
│  Core Layer (引擎内置默认)           │  ← 通用能力：网格、焦点、画中画、虚拟背景
└─────────────────────────────────────┘

// 布局拓扑节点
interface LayoutNode {
  id: string;                    // 全局唯一标识
  type: 'container' | 'slot' | 'component';
  component?: string;            // 组件注册名
  props?: Record<string, any>;   // 静态属性
  bindings?: BindingRule[];      // 数据绑定规则
  children?: LayoutNode[];       // 子节点
  conditions?: ConditionRule[];  // 显隐/状态条件
  animations?: AnimationConfig;  // 进入/退出/变更动画
}

// 数据绑定规则：将会议状态映射为组件 Props
interface BindingRule {
  source: 'participants' | 'streams' | 'layout' | 'custom';
  selector: string;              // JSONPath / 自定义选择器
  transform?: string;            // 可选转换函数名
  targetProp: string;            // 目标组件属性
}

{
  "extends": "industry:finance:v2",
  "layout": {
    "root": {
      "type": "container",
      "children": [
        { "type": "slot", "id": "main", "bindings": [{ "source": "streams", "selector": "$.mainVideo", "targetProp": "stream" }] },
        { "type": "slot", "id": "aux", "bindings": [{ "source": "streams", "selector": "$.screenShare", "targetProp": "stream" }] },
        { "type": "component", "component": "ComplianceWatermark", "props": { "template": "{{userId}}-{{timestamp}}" } },
        { "type": "component", "component": "DualRecordIndicator", "bindings": [{ "source": "custom", "selector": "$.recordingStatus", "targetProp": "status" }] }
      ]
    }
  },
  "interactions": [
    { "trigger": "participant.join", "action": "layout.rebalance", "params": { "strategy": "finance-compliance" } }
  ]
}

配置解析 → 依赖图构建 → 虚拟布局树 → 差分调度 → 宿主挂载
    ↓           ↓            ↓           ↓         ↓
  Schema校验  循环检测      响应式代理   批量更新   错误边界

// 编译产物示例
interface CompiledLayout {
  nodes: Map<string, CompiledNode>;
  dependencyGraph: DependencyGraph;  // 节点间数据依赖
  updatePlans: UpdatePlan[];         // 预计算的更新路径
  metadata: { version: string; hash: string; compileTime: number };
}

class MeetingStore {
  private state = new Map<string, Ref<any>>();
  private computed = new Map<string, ComputedRef<any>>();
  private subscribers = new Map<string, Set<Effect>>();

  // 会议 SDK 事件 → 标准化状态写入
  handleSdkEvent(event: SdkEvent) {
    const path = this.mapEventToPath(event);
    this.batch(() => this.set(path, event.payload));
  }

  // 绑定引擎订阅特定路径
  subscribe(path: string, effect: Effect) { /* ... */ }
  
  // 批量更新合并微任务
  private batch(fn: () => void) { /* ... */ }
}

interface VLayoutNode {
  configId: string;           // 对应配置节点 ID
  component: ComponentType;   // 解析后的组件构造器
  props: Record<string, any>; // 合并后的最终 Props
  children: VLayoutNode[];
  domRef?: HTMLElement;       // 宿主挂载引用
  effectCleanups: (() => void)[]; // 副作用清理函数
}

enum TaskPriority {
  USER_INPUT = 0,      // 用户点击、拖拽
  STREAM_CHANGE = 1,   // 流增减、分辨率变更
  LAYOUT_REBALANCE = 2,// 自动布局重排
  CONFIG_HOT_UPDATE = 3// 配置热更新
}

class RenderScheduler {
  private queues = new Map<TaskPriority, Task[]>();
  
  schedule(task: Task) {
    this.queues.get(task.priority)?.push(task);
    requestIdleCallback(() => this.flush());
  }

  private flush() {
    for (const priority of [0,1,2,3]) {
      const queue = this.queues.get(priority);
      while (queue?.length) {
        const task = queue.shift()!;
        const deadline = performance.now() + (priority <= 1 ? 16 : 50); // 高优先级留更多时间
        task.execute(deadline);
        if (performance.now() > deadline) break; // 时间片用尽，让出主线程
      }
    }
  }
}

// 约束定义 DSL
const constraints = [
  { type: 'aspectRatio', target: 'main', ratio: 16/9, priority: 'required' },
  { type: 'align', targets: ['main', 'aux'], axis: 'top', priority: 'required' },
  { type: 'size', target: 'aux', width: '30%', priority: 'strong' },
  { type: 'order', targets: 'students', by: 'handRaiseTime', priority: 'medium' }
];

graph LR
    A[业务侧 PR 提交配置] --> B{CI 管道}
    B --> C[Schema 校验]
    C --> D[语义化版本自动打标]
    D --> E[编译产物上传制品库]
    E --> F[配置中心注册版本元数据]
    F --> G[客户端轮询/长连接拉取]
    G --> H[本地校验 Hash 后热更新]

// 1. 禁用词/极限词编译期扫描
const forbiddenWords = ['国家级', '最高级', '首创', '独家', '顶级'];
function scanConfigForCompliance(config: LayoutConfig): ComplianceReport {
  const violations: Violation[] = [];
  traverse(config, (node, path) => {
    if (node.props?.text) {
      forbiddenWords.forEach(w => {
        if (node.props.text.includes(w)) violations.push({ path, word: w, level: 'ERROR' });
      });
    }
    // 2. 承诺类表述强制校验备案号
    if (node.component === 'MarketingBanner' && !node.props?.recordNo) {
      violations.push({ path, msg: '营销组件缺少备案号', level: 'WARN' });
    }
  });
  return { pass: violations.filter(v => v.level === 'ERROR').length === 0, violations };
}

// 3. 渲染期动态脱敏（如录屏水印、PII 遮罩）
class ComplianceRendererWrapper implements Renderer {
  wrap(target: Renderer): Renderer {
    return {
      createElement: (tag, props) => {
        if (props['data-pii'] === 'true') {
          props.children = '***'; // 或调用脱敏服务
        }
        return target.createElement(tag, props);
      }
    };
  }
}

interface IRendererAdapter {
  // 生命周期
  createContainer(rootNode: VLayoutNode, container: HostElement): ContainerInstance;
  destroyContainer(instance: ContainerInstance): void;
  
  // 节点操作
  createElement(type: string, props: Props): HostNode;
  patchProp(node: HostNode, key: string, prev: any, next: any): void;
  insert(child: HostNode, parent: HostNode, anchor?: HostNode): void;
  remove(node: HostNode): void;
  
  // 文本/注释
  createText(text: string): HostText;
  setText(node: HostText, text: string): void;
  
  // 事件系统统一
  addEventListener(node: HostNode, event: string, handler: EventHandler): void;
  removeEventListener(node: HostNode, event: string, handler: EventHandler): void;
  
  // 动画/过渡
  scheduleAnimation(callback: FrameCallback): number;
  cancelAnimation(id: number): void;
}

// 测试用例即合法配置片段 + 断言规则
const testCases: ConfigTestCase[] = [
  {
    name: '金融双录-主流缺失时辅流自动升主',
    config: financeDualRecordConfig,
    initialState: { streams: { aux: 'screen-share-id' } }, // 无 main 流
    steps: [
      { action: 'sdkEvent', event: 'stream-added', payload: { id: 'main-cam', type: 'camera' } },
      { assert: 'layout.root.children[0].props.stream.id === "main-cam"' },
      { assert: 'layout.root.children[1].props.stream.id === "screen-share-id"' }
    ]
  }
];

// 自动生成 Vitest/Jest 用例
testCases.forEach(tc => {
  test(tc.name, async () => {
    const engine = createTestEngine(tc.config);
    engine.hydrate(tc.initialState);
    for (const step of tc.steps) {
      if (step.action) engine.dispatch(step.action);
      if (step.assert) await waitFor(() => expect(eval(step.assert)).toBeTrue());
    }
  });
});

sequenceDiagram
    participant User as 产品/运营
    participant Copilot as Layout Copilot
    participant KB as 知识库
    participant Engine as 引擎沙箱
    
    User->>Copilot: "金融双录场景，主画面左侧，右侧上方放屏幕共享，下方放签名板，水印要防截屏"
    Copilot->>KB: 检索 finance 领域 Schema、组件库、合规规则
    KB-->>Copilot: 返回上下文
    Copilot->>Copilot: 生成 JSON 配置 + 解释文档
    Copilot->>Engine: 沙箱预览渲染 (Headless)
    Engine-->>Copilot: 返回截图 + 性能指标 + 合规扫描报告
    Copilot-->>User: 展示预览图、配置代码、风险提示
    User->>Copilot: 确认/微调
    Copilot->>Config Center: 提交 PR 自动走流水线

// 特征工程：会议上下文向量化
interface MeetingContext {
  speakerActivity: number[];      // 最近 30s 发言能量谱
  screenShareContentType: 'code' | 'doc' | 'video' | 'desktop'; // CLIP 分类
  participantCount: number;
  layoutHistory: LayoutAction[];  // 用户手动调整历史
  domain: 'finance' | 'medical' | 'education';
}

// 在线推理服务
class LayoutRecommender {
  async recommend(ctx: MeetingContext): Promise<LayoutPatch> {
    // 1. 规则兜底：发言人优先、共享全屏
    // 2. 模型推理：LightGBM / ONNX Runtime 推理最优布局拓扑
    // 3. 约束投影：将推荐结果投影到当前配置允许的动作空间
    return { 
      operations: [
        { op: 'move', target: 'slot:main', to: 'slot:focus' },
        { op: 'resize', target: 'slot:aux', width: '40%' }
      ],
      confidence: 0.92,
      reason: '检测到屏幕共享为代码类型，建议扩大辅流区域便于阅读'
    };
  }
}