// 错误：v4 chainable API
const graph = new G6.Graph({ ... });
graph.data(data);
graph.render();
graph.node((node) => ({ ... }));  // v4 回调

// 正确：v5 构造函数
const graph = new Graph({
  container: 'container',
  data: { nodes: [...], edges: [...] },
  node: { style: { ... } },
});
graph.render();

// 错误：直接在顶层放业务属性
{ id: 'node1', label: 'Node 1', value: 100 }

// 正确：业务属性放在 data 字段
{ id: 'node1', data: { label: 'Node 1', value: 100 } }

// 错误：v4 labelCfg
node: {
  labelCfg: { style: { fill: '#333' } }
}

// 正确：v5 style.labelText
node: {
  style: {
    labelText: (d) => d.data.label,
    labelFill: '#333',
    labelFontSize: 14,
  }
}

// 错误：v4 modes
modes: {
  default: ['drag-canvas', 'zoom-canvas'],
  edit: ['create-edge'],
}

// 正确：v5 直接 behaviors 数组
behaviors: ['drag-canvas', 'zoom-canvas', 'drag-element'],

// 错误：attributes 是计算后的样式对象，不含节点 data，访问 data.color 抛 TypeError
render(attributes, container) {
  const { data } = attributes;       // undefined
  const fill = data.color;           // TypeError → 白屏
}

// 正确：通过 node.style 回调把 data 字段映射为自定义样式属性
// ① Graph 配置
node: {
  type: 'my-node',
  style: { color: (d) => d.data.color },
},
// ② render() 中直接从 attributes 读取
render(attributes, container) {
  const { color = '#1783FF' } = attributes;  // ✅
}

// 错误：extend 已从 G6 v5 正式版移除，导入后调用会报 "extend is not a function"
import { Graph, extend } from '@antv/g6';
const extendedGraph = extend(Graph, {
  nodes: { 'my-node': MyNodeFn },
});

// 错误：v4 的 group.addShape() API
const MyNode = (node) => (model) => {
  const group = node.group();
  group.addShape('circle', { attrs: { r: 20 } });
};

// 正确：BaseNode 类 + register()
import { BaseNode, Circle, ExtensionCategory, Graph, register } from '@antv/g6';
class MyNode extends BaseNode {
  render(attributes, container) {
    super.render(attributes, container);
    this.upsert('key', Circle, { cx: 0, cy: 0, r: 20, fill: '#1783FF' }, container);
  }
}
register(ExtensionCategory.NODE, 'my-node', MyNode);
const graph = new Graph({ node: { type: 'my-node' } });

// 错误：遗漏 container
const graph = new Graph({ width: 800, height: 600 });

// 正确：container 必填，值为字符串 ID 或 DOM 元素
const graph = new Graph({ container: 'container', width: 800, height: 600 });
// 或传入 DOM 元素
const graph = new Graph({ container: document.getElementById('container'), width: 800, height: 600 });

// 错误：combo-combined / force / d3-force 等布局是异步迭代的
// autoFit 在布局迭代开始前执行，节点全堆在原点，包围盒为零 → 缩放异常 → 白屏
const graph = new Graph({
  autoFit: 'view',          // ❌ 异步布局下不能在此设置
  layout: { type: 'combo-combined' },
});
graph.render();

// 正确：不设置 autoFit，在 AFTER_LAYOUT 事件后调用 fitView
import { Graph, GraphEvent } from '@antv/g6';
const graph = new Graph({
  layout: { type: 'combo-combined' },
});
graph.on(GraphEvent.AFTER_LAYOUT, () => graph.fitView({ padding: 20 }));
graph.render();

import { Graph } from '@antv/g6';

const graph = new Graph({
  // 1. 容器
  container: 'container',       // DOM id 或 HTMLElement
  width: 800,
  height: 600,
  autoFit: 'view',              // 可选：'center' | 'view' | false

  // 2. 数据
  data: {
    nodes: [
       { id: 'n1', data: { label: '节点1' } },
       { id: 'n2', data: { label: '节点2' } },
    ],
    edges: [
       { source: 'n1', target: 'n2' },
    ],
  },

  // 3. 节点样式
  node: {
    type: 'circle',             // 节点类型
    style: {
      size: 40,
      fill: '#1783FF',
      stroke: '#fff',
      lineWidth: 2,
      labelText: (d) => d.data.label,
      labelPlacement: 'bottom',
    },
  },

  // 4. 边样式
  edge: {
    type: 'line',
    style: {
      stroke: '#aaa',
      lineWidth: 1,
      endArrow: true,
    },
  },

  // 5. 布局
  layout: {
    type: 'force',
    preventOverlap: true,
    nodeSize: 40,
  },

  // 6. 交互
  behaviors: ['drag-canvas', 'zoom-canvas', 'drag-element'],

  // 7. 插件（可选）
  plugins: ['grid-line'],

  // 8. 主题（可选）
  theme: 'light',               // 'light' | 'dark'
});

graph.render();

// 在 Graph 配置中为状态设置样式
node: {
  style: {
    fill: '#1783FF',
  },
  state: {
    selected: {
      fill: '#ff6b6b',
      stroke: '#ff4d4d',
      lineWidth: 3,
    },
    hover: {
      fill: '#40a9ff',
    },
  },
},

// 动态设置状态
graph.setElementState('node1', 'selected');
graph.setElementState('node1', ['selected', 'highlight']);
graph.setElementState('node1', []);  // 清除所有状态

// 内置主题
const graph = new Graph({
  theme: 'light',   // 默认
  // theme: 'dark',
});

// 动态切换主题
graph.setTheme('dark');
graph.render();

// 添加元素
graph.addNodeData([{ id: 'n3', data: { label: '新节点' } }]);
graph.addEdgeData([{ source: 'n1', target: 'n3' }]);

// 更新元素
graph.updateNodeData([{ id: 'n1', style: { fill: 'red' } }]);

// 删除元素
graph.removeNodeData(['n3']);

// 更新数据后需要重新渲染
graph.draw();

node: {
  style: {
    size: (d) => d.data.size || 30,
    fill: (d) => {
      const colorMap = { type1: '#1783FF', type2: '#FF6B6B', type3: '#52C41A' };
      return colorMap[d.data.type] || '#ccc';
    },
    labelText: (d) => d.data.name,
  },
},

node: {
  palette: {
    type: 'group',       // 按分类映射颜色
    field: 'category',   // 数据中的分类字段
    color: 'tableau10',  // 内置色板名
  },
},

transforms: [
  {
    type: 'map-node-size',
    field: 'value',
    range: [16, 60],
  },
],

transforms: [
  {
    type: 'process-parallel-edges',
    offset: 15,
  },
],
edge: {
  type: 'quadratic',
},

// 增
graph.addNodeData([{ id: 'n3', data: { label: '新节点' } }]);
graph.addEdgeData([{ source: 'n1', target: 'n3' }]);
graph.draw();

// 删
graph.removeNodeData(['n3']);   // 关联边自动删除
graph.draw();

// 改
graph.updateNodeData([{ id: 'n1', data: { label: '更新' } }]);
graph.draw();

// 查
const node = graph.getNodeData('n1');
const selected = graph.getElementDataByState('node', 'selected');
const zoom = graph.getZoom();

// 视口
await graph.fitView({ padding: 20 });
await graph.focusElement('n1', { duration: 500 });
await graph.zoomTo(1.5);

// 状态
graph.setElementState('n1', 'selected');
graph.setElementState('n1', []);          // 清除

// 销毁
graph.destroy();

// 元素事件（node/edge/combo + 事件类型）
graph.on('node:click', (e) => console.log(e.target.id));
graph.on('edge:pointerover', (e) => graph.setElementState(e.target.id, 'active'));
graph.on('canvas:click', () => { /* 点击空白 */ });

// 生命周期事件
import { GraphEvent } from '@antv/g6';
graph.on(GraphEvent.AFTER_RENDER, () => console.log('渲染完成'));
graph.on(GraphEvent.AFTER_LAYOUT, () => console.log('布局完成'));