import { Suspense, useEffect, useState } from "react";
import { NavLink, Routes, Route, Navigate, useLocation } from "react-router-dom";

import { routes, navGroups, defaultPath } from "../routes";
import { gatewayOnline } from "../api";

// 控制台外壳：导航与内容均由路由注册表派生（动态路由）。
export function AppShell() {
  const [online, setOnline] = useState(false);
  const loc = useLocation();
  const current = routes.find((r) => r.path === loc.pathname);

  useEffect(() => {
    const ping = () => gatewayOnline().then(setOnline);
    ping();
    const id = setInterval(ping, 4000);
    return () => clearInterval(id);
  }, []);

  return (
    <div className="flex h-screen w-screen text-gray-900">
      <aside className="flex w-56 shrink-0 flex-col border-r bg-gray-50">
        <div className="border-b p-4">
          <div className="text-sm font-bold text-gray-800">sundynix-agentix</div>
          <div className="text-[11px] text-gray-400">运维控制台</div>
        </div>
        <nav className="flex flex-col gap-1 p-2">
          {navGroups().map((g) => (
            <div key={g.group}>
              <div className="mt-2 px-3 text-[9px] font-semibold tracking-wider text-gray-300">{g.group}</div>
              {g.items.map((r) => (
                <NavLink
                  key={r.path}
                  to={r.path}
                  className={({ isActive }) =>
                    `flex items-center justify-between rounded px-3 py-2 text-sm ${
                      isActive ? "bg-violet-50 font-medium text-violet-700" : "text-gray-600 hover:bg-gray-100"
                    }`
                  }
                >
                  {r.label}
                  {!r.ready && <span className="text-[9px] text-gray-300">规划</span>}
                </NavLink>
              ))}
            </div>
          ))}
        </nav>
        <div className="mt-auto flex items-center gap-2 border-t p-4 text-[11px] text-gray-500">
          <span className={`h-2 w-2 rounded-full ${online ? "bg-emerald-500" : "bg-rose-500"}`} />
          Gateway {online ? "在线" : "离线"}
        </div>
      </aside>

      <main className="flex-1 overflow-auto p-6">
        <h1 className="mb-4 text-lg font-semibold text-gray-800">{current?.label ?? ""}</h1>
        <Suspense fallback={<div className="text-sm text-gray-400">加载中…</div>}>
          <Routes>
            {routes.map((r) => (
              <Route key={r.path} path={r.path} element={r.element} />
            ))}
            <Route path="*" element={<Navigate to={defaultPath} replace />} />
          </Routes>
        </Suspense>
      </main>
    </div>
  );
}
