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

// ── POST /api/ext/workers/{machineId}/heartbeat (E7) ─────────────────────────
//
// Heartbeat + the server→worker command channel: cancellation piggybacks on
// the response (`commands: [{ type: "CANCEL_JOB", jobId }]`) so no server→
// worker connection is ever needed.

export async function POST(
  req: NextRequest,
  { params }: { params: Promise<{ machineId: string }> }
) {
  if (!isExtAuthorized(req)) {
    return NextResponse.json({ error: "Unauthorized" }, { status: 401 });
  }
  const { machineId } = await params;
  let body: { cpuPercent?: number; memPercent?: number; diskFreeGb?: number; currentJobId?: string | null } = {};
  try {
    body = await req.json();
  } catch {
    // heartbeat with empty body is fine
  }
  try {
    const result = await recordHeartbeat(machineId, body);
    return NextResponse.json(result);
  } catch (err) {
    const { body: errBody, status } = toErrorResponse(err);
    return NextResponse.json(errBody, { status });
  }
}