import { buildsIn, usageIndex, usesOf } from "@/lib/usage";

export const dynamic = "force-dynamic";

// `?key=` asks about one clip; no key gives the index's shape, which is what a
// header wants. Both are cheap after the first call -- the index is rebuilt only
// when a plan file's mtime changes, i.e. when something has actually been
// rendered.
export async function GET(request: Request) {
  const key = new URL(request.url).searchParams.get("key");
  if (!key) {
    const idx = await usageIndex();
    return Response.json(
      { builds: idx.builds, clips: idx.clips },
      { headers: { "cache-control": "no-store" } },
    );
  }
  const uses = await usesOf(key);
  return Response.json(
    { key, uses, builds: buildsIn(uses) },
    { headers: { "cache-control": "no-store" } },
  );
}