import { NextResponse, type NextRequest } from "next/server";
import { SESSION_COOKIE } from "@/lib/cookie";
import { createTextPost } from "@/lib/post-create";
import { createImagePost } from "@/lib/post-media";

// POST /api/posts
//   - JSON  { content }                -> public text post
//   - multipart/form-data content+file -> public image post (one file)
// Both create a public draft on the feed, then publish it, and return { id }.
// For an image the server also uploads the bytes to a presigned URL and confirms
// the upload; the browser never receives the feed token. The create call can
// report status "draft" for a post already on the home feed, so the browser
// reloads the first page and confirms the id there.
// 401 { error: "sign_in" } without a session.

export const runtime = "nodejs";

export async function POST(req: NextRequest) {
  const sessionId = req.cookies.get(SESSION_COOKIE)?.value;
  const contentType = req.headers.get("content-type") ?? "";

  if (contentType.includes("multipart/form-data")) {
    let content = "";
    let file: File | null = null;
    try {
      const form = await req.formData();
      const c = form.get("content");
      content = typeof c === "string" ? c : "";
      const f = form.get("file");
      file = f instanceof File ? f : null;
    } catch {
      return NextResponse.json({ error: "bad_file" }, { status: 400 });
    }
    const result = await createImagePost(sessionId, content, file);
    if (!result.ok) {
      return NextResponse.json({ error: result.error }, { status: result.status });
    }
    return NextResponse.json({ id: result.id });
  }

  let content: unknown = null;
  try {
    content = ((await req.json()) as { content?: unknown }).content;
  } catch {
    content = null;
  }
  const result = await createTextPost(sessionId, content);
  if (!result.ok) {
    return NextResponse.json({ error: result.error }, { status: result.status });
  }
  return NextResponse.json({ id: result.id });
}