import { useEffect, useRef } from 'react';
import { accountApi } from '@/core-bridge/account';
import { acceptInvitation, invitationLabel } from '@/store/invitations';
import { useToast } from '@/store/toast';

const POLL_MS = 8000;

/** 登录后轮询账号邀请,出现新邀请就弹通知,可直接接受 */
export function useInvitationNotices(username: string | null): void {
  const seen = useRef<Set<string> | null>(null);
  useEffect(() => {
    if (!username) { seen.current = null; return; }
    let stopped = false;
    async function poll() {
      try {
        const rows = await accountApi.invitations();
        if (stopped) return;
        const known = seen.current;
        seen.current = new Set(rows.map((row) => row.channel_id));
        const fresh = known ? rows.filter((row) => !known.has(row.channel_id)) : rows;
        for (const row of fresh) {
          useToast.getState().push({ kind: 'info', text: row.invitedBy ? `${row.invitedBy} 邀请你加入 ${invitationLabel(row)}` : `你收到了加入 ${invitationLabel(row)} 的邀请`,
            action: { label: '接受', run: () => { void acceptInvitation(row); } } });
        }
      } catch { /* 下一轮再试,不打扰用户 */ }
    }
    void poll();
    const timer = window.setInterval(() => { void poll(); }, POLL_MS);
    return () => { stopped = true; window.clearInterval(timer); };
  }, [username]);
}