import { NextRequest, NextResponse } from "next/server";
import { headers } from "next/headers";
import { auth } from "@/lib/auth";
import matter from "gray-matter";
import { mdToTiptap } from "@/lib/md-to-tiptap";

export async function POST(req: NextRequest) {
  const session = await auth.api.getSession({ headers: await headers() });
  if (!session || session.user.role !== "admin") {
    return NextResponse.json({ error: "Unauthorized" }, { status: 401 });
  }

  const formData = await req.formData();
  const file = formData.get("file") as File | null;

  if (!file) {
    return NextResponse.json({ error: "No file provided" }, { status: 400 });
  }
  if (!file.name.endsWith(".md")) {
    return NextResponse.json({ error: "Only .md files are supported" }, { status: 400 });
  }

  const raw = await file.text();
  const { data: fm, content } = matter(raw);

  // Extract known frontmatter fields (Obsidian-compatible naming)
  const title =
    typeof fm.title === "string" ? fm.title.trim() : null;
  const kinescopeId =
    (fm.kinescopeId ?? fm.kinescope_id ?? fm.videoId ?? fm.video_id ?? "") as string;
  const order =
    typeof fm.order === "number" ? fm.order : null;
  const published =
    typeof fm.published === "boolean" ? fm.published : null;

  const tiptapContent = mdToTiptap(content);

  return NextResponse.json({ title, kinescopeId, order, published, content: tiptapContent });
}