import { readFile } from "node:fs/promises";
import path from "node:path";
import { configStore } from "@/lib/config/loader";

export const dynamic = "force-dynamic";

const CONFIG_DIR = path.join(process.cwd(), "config");

export async function GET(): Promise<Response> {
  let customCssPath: string | undefined;
  try {
    customCssPath = configStore.get().theme.customCssPath;
  } catch {
    return new Response("", { status: 204 });
  }

  if (!customCssPath) {
    return new Response("", { status: 204 });
  }

  const resolved = path.normalize(path.join(CONFIG_DIR, customCssPath));
  if (!resolved.startsWith(CONFIG_DIR + path.sep)) {
    return new Response("", { status: 204 });
  }

  try {
    const css = await readFile(resolved, "utf-8");
    return new Response(css, {
      headers: { "Content-Type": "text/css; charset=utf-8", "Cache-Control": "no-cache" },
    });
  } catch {
    return new Response("", { status: 204 });
  }
}