/**
 * docs-viewer — documentation viewer on slatehtml + slatehtml-ui.
 *
 *   import "slatehtml";
 *   import { mountDocs } from "docs-viewer";
 *   import "docs-viewer/prose.css";
 *
 *   await mountDocs(document.querySelector("slate-docs-viewer"));
 */

import { deferCustomElementDefines } from "slatehtml/umc";
import { DocsApp, faClassToIconName } from "./app.js";
import { markdownToSpecs, collectHeadings } from "./markdown/render.js";
import { EventBus } from "./services/event-bus.js";
import { IndexService } from "./services/index-service.js";
import { SearchService } from "./services/search-service.js";
import { DocumentService } from "./services/document-service.js";
import { NavigationService } from "./services/navigation-service.js";

const modules = import.meta.glob(["./widgets/*.umc"]);

await deferCustomElementDefines(async () => {
  await Promise.all(
    Object.entries(modules).map(async ([path, load]) => {
      try {
        await load();
      } catch (err) {
        console.error(`[slatehtml-docs] failed to load ${path}`, err);
      }
    })
  );
});

/**
 * Mount / start the docs app on a <slate-docs-viewer> (or create one).
 * @param {ParentNode|string|null} target
 * @param {{ indexUrl?: string, create?: boolean }} [options]
 * @returns {Promise<DocsApp>}
 */
export async function mountDocs(target = "slate-docs-viewer", options = {}) {
  let host =
    typeof target === "string" ? document.querySelector(target) : target;

  if (!host && options.create !== false) {
    host = document.createElement("slate-docs-viewer");
    if (options.indexUrl) host.setAttribute("index", options.indexUrl);
    document.body.appendChild(host);
  }
  if (!host) throw new Error("mountDocs: no slate-docs-viewer host found");

  // Wait a frame so UMC Construct/stamp finishes.
  await Promise.resolve();
  await new Promise((r) => requestAnimationFrame(() => r()));

  const app = new DocsApp(host, {
    indexUrl: options.indexUrl || host.getAttribute("index") || "./index.json",
  });
  await app.start();
  host.__docsApp = app;
  return app;
}

export {
  DocsApp,
  faClassToIconName,
  markdownToSpecs,
  collectHeadings,
  EventBus,
  IndexService,
  SearchService,
  DocumentService,
  NavigationService,
};