import { countBySeverity, decisionsForSong } from "@/lib/decisions";
import { openDecisions } from "@/lib/projects";
import { isSegment } from "@/lib/browse";

export const dynamic = "force-dynamic";

// The worklist, as data.
//
// No cache header and force-dynamic, for the same reason the browse pages are
// dynamic: the CLI scripts write these files underneath the app, so a cached
// "nothing to decide" is the one answer that must never be stale.
//
// `?project=` narrows to one. The parameter is deliberately not called `song`,
// because nothing else in this route knows what a song is.
export async function GET(request: Request) {
  const project = new URL(request.url).searchParams.get("project");
  if (project && !isSegment(project)) {
    return Response.json({ error: "bad project" }, { status: 400 });
  }

  const items = project ? await decisionsForSong(project) : await openDecisions();
  const projects = new Set(items.map((d) => d.project)).size;

  return Response.json(
    { items, projects, counts: countBySeverity(items) },
    { headers: { "cache-control": "no-store" } },
  );
}