import { NextRequest, NextResponse } from "next/server";
import { isExtAuthorized } from "@/lib/render-pipeline/ext-auth";
import { toErrorResponse } from "@/lib/render-pipeline/errors";
import { claimNextJob } from "@/lib/render-pipeline/jobs";

// ── POST /api/ext/render/jobs/claim (E8) ─────────────────────────────────────
//
// Atomically claim the next queued job (FOR UPDATE SKIP LOCKED). Enforces
// machine availability windows / Render Now / urgent priority server-side
// (§7.10). 204 when nothing is claimable.

export async function POST(req: NextRequest) {
  if (!isExtAuthorized(req)) {
    return NextResponse.json({ error: "Unauthorized" }, { status: 401 });
  }
  let body: { machineId?: string; types?: string[] };
  try {
    body = await req.json();
  } catch {
    return NextResponse.json({ error: "Invalid JSON" }, { status: 400 });
  }
  if (!body.machineId) {
    return NextResponse.json({ error: "machineId is required" }, { status: 400 });
  }
  try {
    const result = await claimNextJob(body.machineId, body.types);
    if (!result) return new NextResponse(null, { status: 204 });
    return NextResponse.json(result);
  } catch (err) {
    const { body: errBody, status } = toErrorResponse(err);
    return NextResponse.json(errBody, { status });
  }
}