// // import Viz from "@aduh95/viz.js";
// // const dot2svg = require("@aduh95/viz.js/async");
// // import vizRenderStringAsync from "@aduh95/viz.js/async";
// import {
//   IRequestHandler,
//   checkResponseFields,
//   IArgdownRequest,
//   IVizJsSettings,
//   GraphvizEngine
// } from "@argdown/core";
// import {
//   IAsyncArgdownPlugin,
//   IAsyncRequestHandler
// } from "../IAsyncArgdownPlugin";
// import defaultsDeep from "lodash.defaultsdeep";
// import Viz from "@aduh95/viz.js";
// // @ts-ignore
// import getWorker from "../../node_modules/@aduh95/viz.js/dist/render.node.mjs";

// const worker = getWorker();
// const viz = new Viz({ worker });
// // const worker = getWorker();
// // const viz = new Viz({ worker });
// export class DotToSvgExportPlugin implements IAsyncArgdownPlugin {
//   name = "DotToSvgExportPlugin";
//   defaults: IVizJsSettings;
//   constructor(config?: IVizJsSettings) {
//     this.defaults = defaultsDeep({}, config, {
//       removeProlog: true,
//       engine: GraphvizEngine.DOT
//     });
//   }
//   prepare: IRequestHandler = (request: IArgdownRequest) => {
//     const settings = this.getSettings(request);
//     defaultsDeep(settings, this.defaults);
//   };
//   getSettings = (request: IArgdownRequest): IVizJsSettings => {
//     request.vizJs = request.vizJs || {};
//     return request.vizJs;
//   };
//   runAsync: IAsyncRequestHandler = async (request, response) => {
//     checkResponseFields(this, response, ["dot"]);

//     let { engine, nop, removeProlog } = this.getSettings(request);
//     response.svg = await viz.renderString(response.dot!, {
//       engine,
//       nop,
//       format: "svg"
//     });
//     // .finally(() => viz.terminateWorker());
//     if (removeProlog) {
//       response.svg = this.removeProlog(response.svg!);
//     }
//   };
//   removeProlog = (svg: string): string => {
//     return svg.replace(
//       /<\?[ ]*xml[\S ]+?\?>[\s]*<\![ ]*DOCTYPE[\S\s]+?\.dtd\"[ ]*>/,
//       ""
//     );
//   };
// }