import { getPaperBySlug, risFor } from "@autoscholar/core";
import { handler } from "@/lib/server/api";
import { db } from "@/lib/server/db";

export const runtime = "nodejs";

export const GET = handler(async (_req, { params }) => {
  const { slug } = (await params) as { slug: string };
  const p = await getPaperBySlug(db(), slug);
  const base = process.env.APP_BASE_URL ?? "http://localhost:8470";
  const pub = new Date(p.version.publishedAt);
  const text = risFor({
    publicId: p.paper.publicId,
    title: p.version.title,
    year: pub.getUTCFullYear(),
    month: pub.getUTCMonth() + 1,
    versionNo: p.version.versionNo,
    url: `${base}/research/${p.paper.slug}`,
    keywords: p.version.keywords,
    abstract: p.version.abstract,
  });
  return new Response(text, {
    headers: {
      "content-type": "application/x-research-info-systems; charset=utf-8",
      "content-disposition": `attachment; filename="${p.paper.publicId}.ris"`,
      "cache-control": "public, max-age=3600",
    },
  });
});