// src/pages/infra/useNodeStatus.js
// /api/agent-office/nodes 를 주기 폴링하는 훅. 3초 권장(Three.js 흐름과 동기).
import { useEffect, useState, useRef, useCallback } from 'react';
import { getNodeStatus } from '../../api';

export function useNodeStatus(intervalMs = 4000) {
    const [data, setData] = useState(null);
    const [error, setError] = useState(null);
    const [loading, setLoading] = useState(true);
    const [updatedAt, setUpdatedAt] = useState(null);
    const aliveRef = useRef(true);

    const tick = useCallback(async () => {
        try {
            const d = await getNodeStatus();
            if (!aliveRef.current) return;
            setData(d);
            setError(null);
            setUpdatedAt(Date.now());
        } catch (e) {
            if (!aliveRef.current) return;
            setError(e);
        } finally {
            if (aliveRef.current) setLoading(false);
        }
    }, []);

    useEffect(() => {
        aliveRef.current = true;
        tick();
        const id = setInterval(tick, intervalMs);
        return () => {
            aliveRef.current = false;
            clearInterval(id);
        };
    }, [tick, intervalMs]);

    return { data, error, loading, updatedAt, refresh: tick };
}