(function (root, factory) {
  "use strict";

  const api = factory(root);
  if (typeof module === "object" && module.exports) module.exports = api;
  else root.RacketWikiMermaid = api;
})(typeof window === "object" ? window : globalThis, function (root) {
  "use strict";

  const selector = "pre > code.language-mermaid, pre > code.lang-mermaid";
  let initialized = false;
  let renderSequence = 0;
  let hydrationTimer = null;

  function initialize(mermaidApi = root.mermaid) {
    if (initialized) return;
    if (!mermaidApi || typeof mermaidApi.initialize !== "function") {
      throw new Error("Mermaid is not installed. Open /setup to repair the frontend setup.");
    }
    mermaidApi.initialize({
      startOnLoad: false,
      securityLevel: "strict",
      suppressErrorRendering: true
    });
    initialized = true;
  }

  async function hydrate(container = root.document, mermaidApi = root.mermaid) {
    initialize(mermaidApi);
    const blocks = Array.from(container.querySelectorAll(selector));
    for (const code of blocks) {
      const source = code.parentElement;
      if (!source || source.dataset.mermaidState) continue;
      source.dataset.mermaidState = "rendering";
      try {
        const id = `racket-wiki-mermaid-${++renderSequence}`;
        const rendered = await mermaidApi.render(id, code.textContent || "");
        const diagram = source.ownerDocument.createElement("div");
        diagram.className = "rw-mermaid";
        diagram.setAttribute("role", "img");
        diagram.setAttribute("aria-label", "Mermaid diagram");
        diagram.innerHTML = rendered.svg;
        source.replaceWith(diagram);
        if (typeof rendered.bindFunctions === "function") rendered.bindFunctions(diagram);
      } catch (error) {
        source.dataset.mermaidState = "error";
        source.classList.add("rw-mermaid-error");
        source.title = error && error.message ? error.message : "Mermaid diagram could not be rendered";
        if (root.console && typeof root.console.error === "function") {
          root.console.error("Mermaid diagram could not be rendered", error);
        }
      }
    }
  }

  function queue(container = root.document) {
    if (hydrationTimer !== null) root.clearTimeout(hydrationTimer);
    hydrationTimer = root.setTimeout(() => {
      hydrationTimer = null;
      hydrate(container).catch((error) => {
        if (root.console && typeof root.console.error === "function") root.console.error(error);
      });
    }, 0);
  }

  return { hydrate, initialize, queue, selector };
});