import { withEditNotes } from "@/lib/report/guard";
import { PostsRefused, StaleToken, updatePosts } from "@/lib/report/manifest.mjs";
import { resolveReport } from "@/lib/report/serve.mjs";

export const dynamic = "force-dynamic";

// The two decisions a person makes about a post once it is in the manifest:
// which clip it rides on (`attachTo`, null for the automatic one) and whether
// it is shown (`hide`). Adding, removing or rewording posts is not here --
// they are written into the manifest by whoever cites them.
//
// PUT is the Posts table's one save: `{ project, posts: { <id>: { attachTo?,
// hide? } }, token }`. One unknown id, one bad value, or a result the build's
// validatePosts refuses fails the WHOLE batch and nothing is written. The
// client sends a project id, never a path. Read through GET
// /api/report/onscreen, which carries the rows and the token.

const noStore = { "cache-control": "no-store" };

export async function PUT(request: Request) {
  let body: Record<string, unknown>;
  try {
    body = await request.json();
  } catch {
    return Response.json({ error: "expected JSON" }, { status: 400 });
  }

  const r = await resolveReport(String(body.project ?? ""));
  if ("error" in r) return Response.json({ error: r.error }, { status: r.status });

  try {
    const { result: res, editNotes } = await withEditNotes(r.project, () =>
      updatePosts(
        r.project.dir,
        body.posts as Record<string, { attachTo?: string | null; hide?: boolean }>,
        { token: body.token === undefined ? null : String(body.token) },
      ),
    );
    return Response.json({ ok: true, posts: res.posts, token: res.token, editNotes }, { headers: noStore });
  } catch (e) {
    if (e instanceof StaleToken) {
      return Response.json(
        { error: e.message, expected: e.expected, got: e.got, stale: true },
        { status: 409 },
      );
    }
    if (e instanceof PostsRefused) {
      return Response.json({ error: e.message, errors: e.errors }, { status: 400 });
    }
    return Response.json({ error: e instanceof Error ? e.message : String(e) }, { status: 400 });
  }
}