import type { NextApiRequest, NextApiResponse } from "next";
import { readDocument } from "@/lib/docs";

// The proxy protects Markdown just like the rendered document and search index.
export default function handler(request: NextApiRequest, response: NextApiResponse) {
  response.setHeader("Cache-Control", "private, no-store");
  if (request.method !== "GET") {
    response.setHeader("Allow", "GET");
    return response.status(405).end();
  }
  const slug = request.query.slug;
  if (typeof slug !== "string") return response.status(400).json({ error: "缺少文档地址" });
  try {
    const doc = readDocument(slug);
    if (!doc) return response.status(404).end();
    response.setHeader("Content-Type", "text/plain; charset=utf-8");
    response.setHeader("X-Content-Type-Options", "nosniff");
    return response.status(200).send(doc.content);
  } catch {
    return response.status(503).json({ error: "文档数据库暂时不可用" });
  }
}