"use client";

import { useEffect, useRef } from "react";
import { usePathname } from "next/navigation";
import { apiTelemetryPageView } from "@/lib/api";

/**
 * 公开站页面访问埋点：同 path 30s 内合并；跳过 /admin。
 */
export default function VisitBeacon() {
  const pathname = usePathname();
  const lastRef = useRef<{ path: string; at: number }>({ path: "", at: 0 });

  useEffect(() => {
    if (!pathname || pathname === "/admin" || pathname.startsWith("/admin/")) return;
    const now = Date.now();
    if (lastRef.current.path === pathname && now - lastRef.current.at < 30_000) return;
    lastRef.current = { path: pathname, at: now };
    void apiTelemetryPageView();
  }, [pathname]);

  return null;
}