const handleLinkNode = ({
  node,
  ancestors,
  instructionParam,
  linkURL,
  file,
}) => {
  if (ancestors.length < 2) {
    throw new Error(`remarkPlugin: unexpected ancestors length`)
  }

  // remove link node
  const parent = ancestors[ancestors.length - 1]
  parent.children.splice(parent.children.indexOf(node), 1)

  // 动态import
  const importExpression = `import("${linkURL}?loadDemo").catch(r => {
      if (typeof window === "undefined") return null;
      throw r;
  })`

  ancestors[0].children.splice(
    ancestors[0].children.indexOf(ancestors[1]) + 1,
    0,
    {
      type: 'jsx',
      value: `<DemoRenderer__LinkInstructions demoInfo={${importExpression}} />`,
    }
  )
}

export = {
  name: 'lazyImportDemo',
  handleLinkNode,
}