// Proposed logic for src/probe.ts
const PROBE_CACHE_TTL_MS = 24 * 60 * 60 * 1000;
const PROBE_ERROR_TTL_MS = 60 * 1000;
const probeCache = new Map<string, { result: any; timestamp: number }>();

export async function probeFeishu(creds?: any) {
  // 1. Check Cache
  const cacheKey = `${creds.appId}:${creds.domain}`;
  const cached = probeCache.get(cacheKey);
  if (cached) {
    const ttl = cached.result.ok ? PROBE_CACHE_TTL_MS : PROBE_ERROR_TTL_MS;
    if (Date.now() - cached.timestamp < ttl) return cached.result;
  }

  // 2. Request with Timeout
  try {
    const client = createFeishuClient(creds);
    const response = await (client as any).request({
      method: "GET",
      url: "/open-apis/bot/v3/info",
      params: {}, 
      timeout: 10000 
    });
    // ... cache and return
  } catch (err) {
    // ... cache error for 1 min
  }
}