import { auth } from "@/app/(auth)/auth";

type MetricEvent = {
  name: string;
  ts: number;
  seq?: number;
  latencyMs?: number;
  queueDepth?: number;
  networkType?: string;
  deviceClass?: string;
};

type MetricsPayload = {
  sessionId: string;
  events: MetricEvent[];
};

export async function POST(request: Request) {
  const session = await auth();
  if (!session?.user?.id) {
    return Response.json({ code: "UNAUTHORIZED", message: "请先登录" }, { status: 401 });
  }

  let payload: MetricsPayload;
  try {
    payload = (await request.json()) as MetricsPayload;
  } catch {
    return Response.json({ code: "BAD_REQUEST", message: "无效 JSON" }, { status: 400 });
  }

  if (!payload?.sessionId || !Array.isArray(payload.events)) {
    return Response.json({ code: "BAD_REQUEST", message: "缺少 sessionId 或 events" }, { status: 400 });
  }

  if (payload.events.length > 200) {
    return Response.json(
      { code: "PAYLOAD_TOO_LARGE", message: "events 超过限制（200）" },
      { status: 413 }
    );
  }

  if (payload.events.length > 0) {
    const latest = payload.events[payload.events.length - 1];
    console.log("[RealtimeMetrics]", {
      userId: session.user.id,
      sessionId: payload.sessionId,
      count: payload.events.length,
      latest,
    });
  }

  return Response.json({ ok: true });
}