import { useState, useEffect, useRef } from 'react';
import api from './lib/api.js';
import CommunityAutocompleteInput from './components/CommunityAutocompleteInput.jsx';
import CommunityBadge from './components/CommunityBadge.jsx';
import {
  IconPlus,
  IconSearch,
  IconEdit,
  IconTrash,
  IconCheck,
  IconX,
  IconDatabase,
  IconRefresh,
  IconUpload,
  IconDownload,
  IconDeviceFloppy,
  IconHash,
  IconClock,
  IconFileText,
  IconFilter,
  IconArrowUp,
  IconArrowDown,
  IconNetwork,
  IconCopy,
  IconCopyCheck
} from '@tabler/icons-react';
import TableSkeleton, { TableEmpty } from './components/TableSkeleton.jsx';
import S3MetaBar from './components/S3MetaBar.jsx';
import PageHeaderActions from './components/PageHeaderActions.jsx';
import PageHeader from './components/PageHeader.jsx';
import EmptyState from './components/EmptyState.jsx';
import Breadcrumbs from './components/Breadcrumbs.jsx';
import ConfirmDialog from './components/ConfirmDialog.jsx';
import WsUpdateModal from './components/WsUpdateModal.jsx';
import ConfirmDiffModal from './components/ConfirmDiffModal.jsx';
import HistoryModal from './components/HistoryModal.jsx';
import ErrorAlert from './components/ErrorAlert.jsx';
import { notifyMutationSuccess } from './components/NotifyProvider.jsx';
import ImportModal from './components/ImportModal.jsx';
import QuickAddBar from './components/QuickAddBar.jsx';
import AccordionCard from './components/AccordionCard.jsx';
import SavedFilters from './components/SavedFilters.jsx';
import BulkActionsBar from './components/BulkActionsBar.jsx';
import Tooltip from './components/Tooltip.jsx';
import Pagination from './components/Pagination.jsx';

const API_URL = '/api';

function IPRangesManager() {
  const [items, setItems] = useState([]);
  const [originalItems, setOriginalItems] = useState([]);
  const [etag, setEtag] = useState('');
  const [lastModified, setLastModified] = useState('');
  const [contentLength, setContentLength] = useState(null);
  const [newItem, setNewItem] = useState({ ipRange: '', community: '' });
  const [newInvalid, setNewInvalid] = useState({ ipRange: false, community: false });
  const [error, setError] = useState('');
  const [success, setSuccess] = useState('');
  const [searchTerm, setSearchTerm] = useState('');
  const searchTimer = useRef(null);
  const didInit = useRef(false);
  const [editingIp, setEditingIp] = useState(null);
  const [editingValue, setEditingValue] = useState('');
  const [loading, setLoading] = useState(false);
  const [showDeleteModal, setShowDeleteModal] = useState(false);
  const [itemToDelete, setItemToDelete] = useState(null);
  const [currentPage, setCurrentPage] = useState(1);
  const [totalItems, setTotalItems] = useState(0);
  const [sortField, setSortField] = useState('ipRange');
  const [sortOrder, setSortOrder] = useState('asc');
  const [filterCommunity, setFilterCommunity] = useState('');
  const editInputRef = useRef(null);
  const pageSize = 10;
  const [selectedItems, setSelectedItems] = useState(new Set());

  // Справочник community для подсказок
  const [communities, setCommunities] = useState([]);
  useEffect(() => {
    (async () => {
      try {
        const res = await api.get(`/communities`);
        setCommunities(Array.isArray(res.data) ? res.data : []);
      } catch (e) {
        // тихо игнорируем
      }
    })();
  }, []);

  const renderCommunityBadge = (value) => (<CommunityBadge value={value} communities={communities} />);

  const isValidIPv4 = (ip) => {
    const octets = ip.split('.');
    if (octets.length !== 4) return false;
    return octets.every(o => /^\d{1,3}$/.test(o) && Number(o) >= 0 && Number(o) <= 255);
  };

  const isValidCidr = (value) => {
    const v = String(value).trim();
    const parts = v.split('/');
    if (parts.length !== 2) return false;
    const [ip, mask] = parts;
    if (!isValidIPv4(ip)) return false;
    if (!/^\d{1,2}$/.test(mask)) return false;
    const m = Number(mask);
    return m >= 0 && m <= 32;
  };

  // Допускаем как числовые, так и строковые (AS:NNN) community
  const isValidCommunity = (value) => /^(\d+|\d+:\d+)$/.test(String(value).trim());

  const [wsOpen, setWsOpen] = useState(false);
  const [wsUrl, setWsUrl] = useState('');

  useEffect(() => {
    (async () => { try { const r = await api.get('/ws/url'); setWsUrl(String(r.data?.url || '')); } catch {} })();
  }, []);

  const fetchItems = async () => {
    setLoading(true);
    try {
      const response = await api.get(`/ip-ranges`, { params: { offset: 0, limit: 0, format: 'std' } });
      const payload = Array.isArray(response.data?.items) ? response.data.items : [];
      const total = payload.length;
      setItems(payload);
      setOriginalItems(payload);
      setTotalItems(Number.isFinite(total) ? total : 0);
      setEtag(response.headers?.etag || '');
      setLastModified(response.headers?.['last-modified'] || '');
      const lengthHeader = response.headers?.['content-length-source'];
      setContentLength(typeof lengthHeader !== 'undefined' ? Number(lengthHeader) : null);
      setError('');
    } catch (error) {
      console.error('Error fetching ip-ranges:', error);
      setError('Не удалось загрузить IP-диапазоны. Проверьте, запущен ли бэкенд.');
    } finally {
      setLoading(false);
    }
  };

  useEffect(() => { if (!didInit.current) { didInit.current = true; fetchItems(); } }, []);

  const handleAddItem = () => {
    const cidrOk = isValidCidr(newItem.ipRange);
    const communityOk = isValidCommunity(newItem.community);
    setNewInvalid({ ipRange: !cidrOk, community: !communityOk });
    if (!cidrOk || !communityOk) {
      setError('Введите корректный IP-диапазон в формате CIDR (например 192.168.1.0/24) и числовой community.');
      return;
    }
    setError('');
    setItems([...items, { ipRange: newItem.ipRange.trim(), community: String(newItem.community).trim() }]);
    setNewItem({ ipRange: '', community: '' });
    setNewInvalid({ ipRange: false, community: false });
  };

  const handleEdit = (item) => {
    setEditingIp(item.ipRange);
    setEditingValue(item.community);
  };

  const handleSaveEdit = (ipRange) => {
    if (!isValidCommunity(editingValue)) {
      setError('Community должен быть числом.');
      return;
    }
    const updatedItems = items.map(i =>
      i.ipRange === ipRange ? { ...i, community: String(editingValue).trim() } : i
    );
    setItems(updatedItems);
    setEditingIp(null);
  };

  const handleCancelEdit = () => {
    setEditingIp(null);
  };

  const handleDeleteItem = (ipRangeToDelete) => {
    setItems(items.filter(i => i.ipRange !== ipRangeToDelete));
    setSelectedItems(prev => {
      const next = new Set(prev);
      next.delete(ipRangeToDelete);
      return next;
    });
  };

  // Функции для работы с выбранными элементами
  const toggleSelectItem = (ipRange) => {
    setSelectedItems(prev => {
      const next = new Set(prev);
      if (next.has(ipRange)) {
        next.delete(ipRange);
      } else {
        next.add(ipRange);
      }
      return next;
    });
  };

  const selectAll = () => {
    setSelectedItems(new Set(paginatedItems.map(i => i.ipRange)));
  };

  const deselectAll = () => {
    setSelectedItems(new Set());
  };

  const handleBulkDelete = () => {
    if (selectedItems.size === 0) return;
    const count = selectedItems.size;
    setItems(items.filter(i => !selectedItems.has(i.ipRange)));
    setSelectedItems(new Set());
    window.notify?.success?.(`Удалено ${count} записей`);
  };

  const handleBulkExport = () => {
    if (selectedItems.size === 0) return;
    const selected = items.filter(i => selectedItems.has(i.ipRange));
    const header = ['ipRange', 'community'];
    const csv = [header, ...selected.map(i => [i.ipRange, i.community])]
      .map(r => r.map(x => `"${(x ?? '').toString().replace(/"/g, '""')}"`).join(','))
      .join('\n');
    const blob = new Blob([csv], { type: 'text/csv;charset=utf-8;' });
    const url = URL.createObjectURL(blob);
    const a = document.createElement('a');
    a.href = url;
    a.download = `ip_ranges_selected_${new Date().toISOString().split('T')[0]}.csv`;
    a.click();
    URL.revokeObjectURL(url);
    window.notify?.success?.(`Экспортировано ${selectedItems.size} записей`);
  };

  const copyToClipboard = (text) => {
    navigator.clipboard.writeText(text).then(() => {
      window.notify?.success?.('Скопировано в буфер обмена');
    }).catch(() => {
      window.notify?.error?.('Не удалось скопировать');
    });
  };

  const duplicateItem = (item) => {
    setItems([...items, { ...item, ipRange: `${item.ipRange.split('/')[0]}/24` }]);
    window.notify?.success?.('Запись продублирована');
  };

  const confirmDelete = (item) => {
    setItemToDelete(item);
    setShowDeleteModal(true);
  };

  const executeDelete = () => {
    if (itemToDelete) {
      handleDeleteItem(itemToDelete.ipRange);
      setShowDeleteModal(false);
      setItemToDelete(null);
    }
  };

  const deduplicate = (arr) => {
    const seen = new Set();
    const out = [];
    for (const i of arr) {
      const key = String(i.ipRange).trim();
      if (!key) continue;
      if (seen.has(key)) continue;
      seen.add(key);
      out.push({ ipRange: key, community: String(i.community || '').trim() });
    }
    return out;
  };

  const computeDiff = (before, after) => {
    const mapBefore = new Map(before.map(i => [i.ipRange, i]));
    const mapAfter = new Map(after.map(i => [i.ipRange, i]));
    const added = [];
    const removed = [];
    const changed = [];
    for (const [k, v] of mapAfter) {
      if (!mapBefore.has(k)) { added.push(v); continue; }
      const prev = mapBefore.get(k);
      if (String(prev.community) !== String(v.community)) changed.push({ from: prev, to: v });
    }
    for (const [k, v] of mapBefore) {
      if (!mapAfter.has(k)) removed.push(v);
    }
    return { added, removed, changed };
  };

  const [showDiff, setShowDiff] = useState(false);
  const [diff, setDiff] = useState({ added: [], removed: [], changed: [] });
  const [confirmSaveOpen, setConfirmSaveOpen] = useState(false);
  const [historyOpen, setHistoryOpen] = useState(false);
  const [clearCommunitiesOpen, setClearCommunitiesOpen] = useState(false);

  // Аналитика
  const [analyzeOpen, setAnalyzeOpen] = useState(false);
  const [analyzeConfirmOpen, setAnalyzeConfirmOpen] = useState(false);
  const [analysisResultsOpen, setAnalysisResultsOpen] = useState(false);
  const [analysisPreview, setAnalysisPreview] = useState(null);
  const [overwriteConfirmOpen, setOverwriteConfirmOpen] = useState(false);
  const [analyzeFilters, setAnalyzeFilters] = useState({ community: '', minMask: 0, maxMask: 32, type: 'any', supernet16: false });

  const handlePreviewDiff = () => {
    const valid = items.filter(i => i != null && isValidCidr(i.ipRange) && isValidCommunity(i.community))
      .map(i => ({ ipRange: i.ipRange.trim(), community: String(i.community).trim() }));
    const unique = deduplicate(valid);
    setDiff(computeDiff(originalItems, unique));
    setShowDiff(true);
  };

  const handleSaveChanges = async () => {
    // подготовим diff и спросим подтверждение только при массовых изменениях (>10)
    const valid = items.filter(i => i != null && isValidCidr(i.ipRange) && isValidCommunity(i.community))
      .map(i => ({ ipRange: i.ipRange.trim(), community: String(i.community).trim() }));
    const unique = deduplicate(valid);
    const diffData = computeDiff(originalItems, unique);
    setDiff(diffData);
    
    // Умное подтверждение: показываем модалку только при массовых изменениях
    const totalChanges = (diffData.added?.length || 0) + (diffData.removed?.length || 0) + (diffData.changed?.length || 0);
    
    if (totalChanges > 10) {
      // Массовое изменение - требуется подтверждение
      setConfirmSaveOpen(true);
    } else {
      // Малое изменение - сохраняем сразу
      performSave();
    }
  };

  const performSave = async () => {
    setConfirmSaveOpen(false);
    setLoading(true);
    try {
      const valid = items.filter(i => isValidCidr(i.ipRange) && isValidCommunity(i.community))
        .map(i => ({ ipRange: i.ipRange.trim(), community: String(i.community).trim() }));
      const unique = deduplicate(valid);

      // Загрузим полный список, совместим с изменениями текущей страницы и сохраним
      const fullRes = await api.get(`/ip-ranges`, { params: { offset: 0, limit: 0, format: 'std' } });
      const full = Array.isArray(fullRes.data?.items) ? fullRes.data.items : (Array.isArray(fullRes.data) ? fullRes.data : []);
      const fullMap = new Map(full.map(i => [String(i.ipRange).trim(), { ipRange: String(i.ipRange).trim(), community: String(i.community || '').trim() }]));
      const originalPageMap = new Map(originalItems.map(i => [String(i.ipRange).trim(), true]));
      const uniqueMap = new Map(unique.map(i => [String(i.ipRange).trim(), { ipRange: String(i.ipRange).trim(), community: String(i.community).trim() }]));
      for (const key of originalPageMap.keys()) {
        if (!uniqueMap.has(key)) fullMap.delete(key);
      }
      for (const [key, val] of uniqueMap.entries()) fullMap.set(key, val);
      const fullToSave = Array.from(fullMap.values());

      const et = fullRes?.headers?.etag || etag;
      const response = await api.post(`/ip-ranges`, { ipRanges: fullToSave, etag: et }, { validateStatus: () => true });
      if (response.status === 412) {
        setError('Данные изменились в S3 (ETag mismatch). Обновите список и попробуйте снова.');
        return;
      }
      if (response.status >= 400) {
        throw new Error(`Save failed with status ${response.status}`);
      }
      setEtag(response.headers?.etag || et);
      await fetchItems();
      setSuccess('Изменения успешно сохранены!');
      setTimeout(() => setSuccess(''), 3000);
      notifyMutationSuccess('Изменения сохранены');
    } catch (error) {
      console.error('Error saving changes:', error);
      setError('Не удалось сохранить изменения.');
    } finally {
      setLoading(false);
    }
  };

  const handleImport = () => {
    setImportOpen(true);
  };

  const handleExport = async () => {
    try {
      const effectiveQ = searchTerm ? searchTerm : (filterCommunity ? filterCommunity : '');
      const response = await api.get(`/ip-ranges`, { params: { q: effectiveQ, offset: 0, limit: 0, format: 'std' } });
      const all = Array.isArray(response.data?.items) ? response.data.items : (Array.isArray(response.data) ? response.data : []);
      const header = ['ipRange', 'community'];
      const csv = [header, ...all.map(i => [i.ipRange, i.community])]
        .map(r => r.map(x => `"${(x ?? '').toString().replace(/"/g, '""')}"`).join(','))
        .join('\n');
      const blob = new Blob([csv], { type: 'text/csv;charset=utf-8;' });
      const url = URL.createObjectURL(blob);
      const a = document.createElement('a');
      a.href = url;
      a.download = `ip_ranges_${new Date().toISOString().split('T')[0]}.csv`;
      a.click();
      URL.revokeObjectURL(url);
    } catch (e) {
      window.notify?.error('Экспорт IP-диапазонов не удался', String(e?.message || e));
    }
  };

  // Drag&Drop импорт (оставим как быстрый путь)
  const onDropImport = async (e) => {
    e.preventDefault();
    const file = e.dataTransfer?.files?.[0];
    if (!file) return;
    const text = await file.text();
    const lines = text.split(/\r?\n/).map(l => l.trim()).filter(Boolean);
    const parsed = lines.map(l => {
      const [cidr, c] = l.split(/\s+/);
      return { ipRange: (cidr || '').trim(), community: (c || '').trim() };
    }).filter(i => i != null && isValidCidr(i.ipRange) && isValidCommunity(i.community));
    setItems(prev => {
      const merged = [...prev, ...parsed];
      const map = new Map();
      for (const it of merged) {
        const key = String(it.ipRange).trim();
        if (!map.has(key)) map.set(key, { ipRange: key, community: String(it.community).trim() });
      }
      return Array.from(map.values());
    });
  };

  const clearInvalid = () => {
    setItems(prev => prev.filter(i => i != null && (i.ipRange || i.community))
      .filter(i => isValidCidr(i.ipRange) && isValidCommunity(i.community))
    );
  };

  // ===== Импорт через модалку =====
  const [importOpen, setImportOpen] = useState(false);
  const parseLine = (line) => {
    const [cidr, c] = String(line).split(/\s+/);
    return { ipRange: (cidr || '').trim(), community: (c || '').trim() };
  };
  const validateItem = (obj) => isValidCidr(obj.ipRange) && isValidCommunity(obj.community);
  const applyImportedItems = (list) => {
    setItems(prev => {
      const merged = [...prev, ...list];
      const map = new Map();
      for (const it of merged) {
        const key = String(it.ipRange).trim();
        if (!map.has(key)) map.set(key, { ipRange: key, community: String(it.community).trim() });
      }
      return Array.from(map.values());
    });
    setImportOpen(false);
  };

  // Шаблон CSV для пустого состояния
  const downloadSampleCsv = () => {
    const header = ['ipRange','community'];
    const lines = [header, ['192.168.1.0/24', '65000:100']]
      .map(r => r.map(x => `"${(x ?? '').toString().replace(/"/g, '""')}"`).join(','))
      .join('\n');
    const blob = new Blob([lines], { type: 'text/csv;charset=utf-8;' });
    const url = URL.createObjectURL(blob);
    const a = document.createElement('a');
    a.href = url;
    a.download = 'ip_ranges_sample.csv';
    a.click();
    URL.revokeObjectURL(url);
  };

  // Сортировка
  const sortedItems = [...items].sort((a, b) => {
    let valA = a[sortField] || '';
    let valB = b[sortField] || '';
    if (typeof valA === 'string') valA = valA.toLowerCase();
    if (typeof valB === 'string') valB = valB.toLowerCase();
    if (valA < valB) return sortOrder === 'asc' ? -1 : 1;
    if (valA > valB) return sortOrder === 'asc' ? 1 : -1;
    return 0;
  });

  // Локальная фильтрация и пагинация
  const filtered = sortedItems.filter(i => {
    const byCommunity = !filterCommunity || i.community === filterCommunity;
    const term = String(searchTerm || '').toLowerCase();
    const bySearch = !term || String(i.ipRange).toLowerCase().includes(term);
    return byCommunity && bySearch;
  });
  const totalPages = Math.max(1, Math.ceil(filtered.length / pageSize));
  const paginatedItems = filtered.slice((currentPage - 1) * pageSize, (currentPage) * pageSize);

  // Для фильтра - список всех уникальных community
  const allCommunities = Array.from(new Set(items.map(i => i.community)));

  // Сортировка по клику
  const handleSort = (field) => {
    if (sortField === field) {
      setSortOrder(sortOrder === 'asc' ? 'desc' : 'asc');
    } else {
      setSortField(field);
      setSortOrder('asc');
    }
  };

  // Улучшенный инлайн-редакт
  useEffect(() => {
    if (editingIp && editInputRef.current) {
      editInputRef.current.focus();
    }
  }, [editingIp]);
  // Глобальные хоткеи: Ctrl+S — сохранить изменения
  useEffect(() => {
    const onKey = (e) => {
      if ((e.ctrlKey || e.metaKey) && (e.key === 's' || e.key === 'S')) {
        e.preventDefault();
        if (!loading) handleSaveChanges();
      }
    };
    window.addEventListener('keydown', onKey);
    return () => window.removeEventListener('keydown', onKey);
  }, [loading, items, originalItems, etag, sortField, sortOrder, filterCommunity]);

  const handleEditKeyDown = (e, ipRange) => {
    if (e.key === 'Enter') handleSaveEdit(ipRange);
    if (e.key === 'Escape') handleCancelEdit();
  };

  // ===== Аналитика: утилиты =====
  const parseMask = (cidr) => {
    const parts = String(cidr || '').split('/');
    const mask = Number(parts[1]);
    return Number.isFinite(mask) ? mask : NaN;
  };

  const countAddresses = (mask) => {
    if (!Number.isFinite(mask) || mask < 0 || mask > 32) return 0n;
    return 1n << BigInt(32 - mask);
  };

  const parseOctets = (ip) => {
    const [a, b, c, d] = String(ip || '').split('.').map(x => Number(x));
    return [a, b, c, d];
  };

  const isPrivateIPv4 = (ip) => {
    const [a, b] = parseOctets(ip);
    if (a === 10) return true; // 10.0.0.0/8
    if (a === 192 && b === 168) return true; // 192.168.0.0/16
    if (a === 172 && b >= 16 && b <= 31) return true; // 172.16.0.0/12
    return false;
  };

  const isCGNATIPv4 = (ip) => {
    const [a, b] = parseOctets(ip);
    return a === 100 && b >= 64 && b <= 127; // 100.64.0.0/10
  };

  const getIpCategory = (cidr) => {
    const baseIp = String(cidr || '').split('/')[0];
    if (isCGNATIPv4(baseIp)) return 'cgnat';
    if (isPrivateIPv4(baseIp)) return 'private';
    return 'public';
  };

  const formatBigInt = (n) => {
    try {
      const s = (n ?? 0n).toString();
      return s.replace(/\B(?=(\d{3})+(?!\d))/g, ' ');
    } catch {
      return String(n);
    }
  };

  const buildAnalysisConfirmText = () => {
    const parts = [];
    parts.push(`Community: ${analyzeFilters.community || 'не выбрано'}`);
    parts.push(`Маска: /${analyzeFilters.minMask}..../${analyzeFilters.maxMask}`);
    const typeLabel = analyzeFilters.type === 'any' ? 'любой' : (analyzeFilters.type === 'private' ? 'только приватные' : (analyzeFilters.type === 'public' ? 'только публичные' : 'только CGNAT'));
    parts.push(`Тип: ${typeLabel}`);
    parts.push(`Агрегировать >2 префиксов в одном /16 до /16: ${analyzeFilters.supernet16 ? 'да' : 'нет'}`);
    return parts.join('\n');
  };

  // ===== Суммаризация CIDR для выбранного community =====
  const ipToInt = (ip) => {
    const [a, b, c, d] = parseOctets(ip);
    return (BigInt(a) << 24n) | (BigInt(b) << 16n) | (BigInt(c) << 8n) | BigInt(d);
  };

  const intToIp = (num) => {
    const a = Number((num >> 24n) & 255n);
    const b = Number((num >> 16n) & 255n);
    const c = Number((num >> 8n) & 255n);
    const d = Number(num & 255n);
    return `${a}.${b}.${c}.${d}`;
  };

  const cidrToRange = (cidr) => {
    const [ip, maskStr] = String(cidr).split('/');
    const mask = Number(maskStr);
    const ipNum = ipToInt(ip);
    const hostBits = 32 - mask;
    const start = ipNum & (~0n << BigInt(hostBits));
    const end = start | ((1n << BigInt(hostBits)) - 1n);
    return [start, end];
  };

  const countTrailingZeros32 = (n) => {
    if (n === 0n) return 32;
    let zeros = 0;
    for (let i = 0; i < 32; i++) {
      if ((n & (1n << BigInt(i))) !== 0n) { zeros = i; break; }
    }
    return zeros;
  };

  const floorLog2 = (n) => {
    let p = -1;
    while (n > 0n) { n >>= 1n; p++; }
    return p < 0 ? 0 : p;
  };

  const rangeToCidrs = (start, end) => {
    const res = [];
    let cur = start;
    while (cur <= end) {
      const maxAlignPow = countTrailingZeros32(cur);
      const remaining = end - cur + 1n;
      const remainingPow = floorLog2(remaining);
      const blockPow = Math.min(maxAlignPow, remainingPow);
      const mask = 32 - blockPow;
      res.push(`${intToIp(cur)}/${mask}`);
      cur += 1n << BigInt(blockPow);
    }
    return res;
  };

  const mergeIntervals = (intervals) => {
    if (intervals.length === 0) return [];
    intervals.sort((a, b) => (a[0] < b[0] ? -1 : a[0] > b[0] ? 1 : 0));
    const merged = [];
    let [cs, ce] = intervals[0];
    for (let i = 1; i < intervals.length; i++) {
      const [s, e] = intervals[i];
      if (s <= ce + 1n) {
        if (e > ce) ce = e;
      } else {
        merged.push([cs, ce]);
        cs = s; ce = e;
      }
    }
    merged.push([cs, ce]);
    return merged;
  };

  const summarizeCidrs = (cidrs) => {
    const ranges = cidrs.map(cidrToRange);
    const merged = mergeIntervals(ranges);
    const out = [];
    for (const [s, e] of merged) {
      out.push(...rangeToCidrs(s, e));
    }
    return out;
  };

  // Агрессивная агрегация: если в одном /16 > 2 префиксов — свернуть в /16
  const get16BaseCidr = (cidr) => {
    const ip = String(cidr).split('/')[0];
    const ipNum = ipToInt(ip);
    const start = ipNum & (~0n << 16n);
    return `${intToIp(start)}/16`;
  };

  const applySupernet16 = (cidrs) => {
    const buckets = new Map();
    for (const c of cidrs) {
      const base16 = get16BaseCidr(c);
      if (!buckets.has(base16)) buckets.set(base16, []);
      buckets.get(base16).push(c);
    }
    const out = [];
    for (const [base16, list] of buckets) {
      if (list.length > 2) out.push(base16); else out.push(...list);
    }
    return Array.from(new Set(out));
  };

  const runAnalysis = () => {
    const community = String(analyzeFilters.community || '').trim();
    if (!community) { window.notify?.error?.('Выберите community'); return; }
    // исходные для community
    const allForCommunity = items.filter(i => i != null && i.community === community && isValidCidr(i.ipRange));
    const totalBefore = allForCommunity.length;

    const filtered = allForCommunity.filter(i => {
      const mask = parseMask(i.ipRange);
      if (mask < analyzeFilters.minMask || mask > analyzeFilters.maxMask) return false;
      const cat = getIpCategory(i.ipRange);
      if (analyzeFilters.type !== 'any' && cat !== analyzeFilters.type) return false;
      return true;
    });
    const unchanged = allForCommunity.filter(i => !filtered.includes(i));

    const beforeCidrs = filtered.map(i => i.ipRange);
    let afterCidrs = summarizeCidrs(beforeCidrs);
    if (analyzeFilters.supernet16) {
      afterCidrs = applySupernet16(afterCidrs);
    }
    const processedBefore = beforeCidrs.length;
    const processedAfter = afterCidrs.length;
    const totalAfter = processedAfter + unchanged.length;

    setAnalysisPreview({
      community,
      totalBefore,
      totalAfter,
      processedBefore,
      processedAfter,
      unchangedCount: unchanged.length,
      beforeCidrs,
      afterCidrs,
      unchangedCidrs: unchanged.map(i => i.ipRange)
    });
    setAnalysisResultsOpen(true);
  };

  const applyAnalysisToItems = () => {
    if (!analysisPreview) return;
    const { community, afterCidrs, unchangedCidrs } = analysisPreview;
    const keptOthers = items.filter(i => i != null && i.community !== community);
    const newCommunityItems = [
      ...unchangedCidrs.map(ipRange => ({ ipRange, community })),
      ...afterCidrs.map(ipRange => ({ ipRange, community }))
    ];
    // Удаляем дубликаты по ipRange, соблюдая глобальную уникальность ключа ipRange
    const map = new Map();
    for (const it of [...keptOthers, ...newCommunityItems]) {
      const key = String(it.ipRange).trim();
      if (!map.has(key)) map.set(key, { ipRange: key, community: String(it.community).trim() });
      else {
        // Если ipRange уже существует в другой community, перезапишем значением текущего (по выбранному community)
        // но только если этот ipRange относится к выбранному community
        if (it.community === community) map.set(key, { ipRange: key, community: String(it.community).trim() });
      }
    }
    const next = Array.from(map.values());
    setItems(next);
    setAnalysisResultsOpen(false);
    setOverwriteConfirmOpen(false);
    window.notify?.success?.('Диапазоны перезаписаны по результатам анализа. Не забудьте сохранить изменения.');
  };

  const exportAnalysisCsv = () => {
    const header = ['community', 'ranges', 'totalAddresses'];
    const lines = [header, ...analysisResult.map(r => [r.community, r.ranges, r.totalAddresses.toString()])]
      .map(r => r.map(x => `"${(x ?? '').toString().replace(/"/g, '""')}"`).join(','))
      .join('\n');
    const blob = new Blob([lines], { type: 'text/csv;charset=utf-8;' });
    const url = URL.createObjectURL(blob);
    const a = document.createElement('a');
    a.href = url;
    a.download = `ip_ranges_analysis_${new Date().toISOString().split('T')[0]}.csv`;
    a.click();
    URL.revokeObjectURL(url);
  };

  return (
    <>
      {error && (
        <ErrorAlert message={error} onClose={() => setError('')} />
      )}
      
      {success && (
        <div className="alert alert-success alert-dismissible" role="alert">
          <div className="d-flex">
            <div>
              <IconCheck className="icon alert-icon" />
            </div>
            <div>
              {success}
            </div>
          </div>
          <button type="button" className="btn-close" onClick={() => setSuccess('')}></button>
        </div>
      )}

      <PageHeader
        title="IP-диапазоны"
        pretitle={(
          <Breadcrumbs items={[
            { label: 'Главная', to: '/dashboard' },
            { label: 'Данные' },
            { label: 'IP ranges' },
          ]} />
        )}
        actions={(
          <PageHeaderActions
              loading={loading}
              onPreview={handlePreviewDiff}
              disablePreview={loading || items.length === 0}
              onRefresh={fetchItems}
              disableRefresh={loading}
              onImport={handleImport}
              onExport={handleExport}
              disableExport={items.length === 0}
              onClear={clearInvalid}
              disableClear={items.length === 0}
              onClearCommunities={() => { if (!filterCommunity) { setError('Выберите community в фильтре для очистки'); return; } setClearCommunitiesOpen(true); }}
              disableClearCommunities={items.length === 0 || !filterCommunity}
              onSave={handleSaveChanges}
              disableSave={loading}
              onHistory={() => setHistoryOpen(true)}
              onOnlineUpdate={() => setWsOpen(true)}
              onBackgroundUpdate={async () => {
                try {
                  const res = await fetch('/api/update-bgp/background', { method: 'POST' });
                  const data = await res.json().catch(() => ({}));
                  if (!res.ok || data.ok === false) {
                    throw new Error(data?.message || `HTTP ${res.status}`);
                  }
                  notifyMutationSuccess('Фоновое обновление запущено', data);
                } catch (e) {
                  window.notify?.error('Не удалось запустить фоновое обновление', String(e));
                }
              }}
          />
        )}
      />
      <div className="row">
        <div className="col-lg-3">
          {/* Classic Add New Item Card (improved) */}
          <div className="card card-md animate-in">
            <div className="card-header bg-primary-lt">
              <h3 className="card-title text-primary">
                <IconPlus className="icon me-2" />
                Добавить новый IP-диапазон
              </h3>
            </div>
            <div className="card-body">
              <form onSubmit={(e) => { e.preventDefault(); handleAddItem(); }}>
                <div className="mb-3">
                  <label className="form-label required">IP-диапазон</label>
                  <div className="input-icon">
                    <span className="input-icon-addon">
                      <IconNetwork size={18} />
                    </span>
                    <input
                      type="text"
                      className={`form-control${newInvalid.ipRange ? ' is-invalid' : isValidCidr(newItem.ipRange) ? ' is-valid' : ''}`}
                      placeholder="192.168.1.0/24"
                      value={newItem.ipRange}
                      onChange={(e) => setNewItem({ ...newItem, ipRange: e.target.value })}
                    />
                  </div>
                  {newInvalid.ipRange && <div className="invalid-feedback">Некорректный CIDR</div>}
                  {isValidCidr(newItem.ipRange) && !newInvalid.ipRange && (<div className="valid-feedback">Корректный CIDR</div>)}
                  <div className="form-text text-muted small">Формат: A.B.C.D/Маска, например 10.0.0.0/24</div>
                </div>
                <div className="mb-3">
                  <label className="form-label required">Community</label>
                  <div className="input-icon">
                    <span className="input-icon-addon">
                      <IconHash size={18} />
                    </span>
                    <CommunityAutocompleteInput
                      value={newItem.community}
                      onChange={(v) => setNewItem({ ...newItem, community: v })}
                      communities={communities}
                      placeholder="Начните вводить номер или имя"
                      className={`form-control${newInvalid.community ? ' is-invalid' : isValidCommunity(newItem.community) ? ' is-valid' : ''}`}
                      useShortValue={true}
                    />
                  </div>
                  {newInvalid.community && <div className="invalid-feedback">Неверный формат community</div>}
                  {isValidCommunity(newItem.community) && !newInvalid.community && (<div className="valid-feedback">Корректный формат community</div>)}
                  {(() => {
                    const match = communities.find(c => c.value === String(newItem.community).trim());
                    if (!match) return null;
                    return (
                      <div className="alert alert-info alert-dismissible mt-2 mb-0" role="alert">
                        <div className="d-flex">
                          <div>
                            <strong>{match.name || match.value}</strong>
                            {match.description && <div className="text-muted small">{match.description}</div>}
                            {match.tags && match.tags.length > 0 && (
                              <div className="mt-1">
                                {match.tags.map((tag, idx) => (<span key={idx} className="badge bg-blue-lt text-blue me-1">{tag}</span>))}
                              </div>
                            )}
                          </div>
                        </div>
                      </div>
                    );
                  })()}
                </div>
                <div className="form-footer">
                  <button type="submit" className="btn btn-primary w-100" disabled={!isValidCidr(newItem.ipRange) || !isValidCommunity(newItem.community)}>
                    <IconPlus className="icon me-2" />
                    Добавить диапазон
                  </button>
                </div>
              </form>
            </div>
          </div>

          {/* Дополнительные варианты */}
          <AccordionCard title={'Дополнительные варианты'} defaultOpen={false} className="animate-in" style={{animationDelay: '0.1s'}}>
            <QuickAddBar
              placeholder={'192.168.1.0/24 65000:100'}
              help={'Вставьте строки: CIDR ПРОБЕЛ COMMUNITY'}
              parseLine={(line) => { const [cidr, c] = String(line).split(/\s+/); return { ipRange: (cidr||'').trim(), community: (c||'').trim() }; }}
              validateItem={(obj) => isValidCidr(obj.ipRange) && isValidCommunity(obj.community)}
              onApply={(list) => {
                setItems(prev => {
                  const merged = [...prev, ...list];
                  const map = new Map();
                  for (const it of merged) {
                    const key = String(it.ipRange).trim();
                    if (!map.has(key)) map.set(key, { ipRange: key, community: String(it.community).trim() });
                  }
                  return Array.from(map.values());
                });
              }}
            />
            <div className="card card-md border-dashed mt-3 animate-in"
                 style={{animationDelay: '0.15s'}}
                 onDragOver={(e) => { e.preventDefault(); e.currentTarget.style.borderColor = 'var(--tblr-primary)'; }}
                 onDragLeave={(e) => { e.currentTarget.style.borderColor = ''; }}
                 onDrop={(e) => { e.currentTarget.style.borderColor = ''; onDropImport(e); }}
            >
              <div className="card-body text-center text-muted py-4">
                <IconUpload size={32} className="mb-2 text-muted" />
                <div className="fw-medium">Перетащите файл TXT/CSV сюда</div>
                <div className="small">Формат: CIDR community</div>
              </div>
            </div>
          </AccordionCard>
          

          {/* Карточка действий больше не нужна — действия перенесены в page-header */}
        </div>

        <div className="col-lg-9">
          {/* BulkActionsBar */}
          <BulkActionsBar
            selectedCount={selectedItems.size}
            totalCount={paginatedItems.length}
            onSelectAll={selectAll}
            onDeselectAll={deselectAll}
            onDelete={selectedItems.size > 0 ? () => {
              if (confirm(`Удалить ${selectedItems.size} записей?`)) {
                handleBulkDelete();
              }
            } : null}
            onExport={selectedItems.size > 0 ? handleBulkExport : null}
          />

          <div className="card">
            <div className="card-header d-flex justify-content-between align-items-center flex-wrap gap-2">
              <h3 className="card-title mb-0">Список IP-диапазонов <span className="badge bg-blue-lt text-blue ms-2">{items.length}</span></h3>
              <div className="d-flex gap-2 flex-wrap">
                <SavedFilters
                  pageKey="ip-ranges"
                  currentFilters={{ searchTerm, filterCommunity, sortField, sortOrder }}
                  onApplyFilter={(filters) => {
                    setSearchTerm(filters.searchTerm || '');
                    setFilterCommunity(filters.filterCommunity || '');
                    setSortField(filters.sortField || 'ipRange');
                    setSortOrder(filters.sortOrder || 'asc');
                    setCurrentPage(1);
                  }}
                />
                <div className="d-flex gap-2 w-auto flex-grow-1" style={{minWidth: '300px'}}>
                  {/* Фильтр по community */}
                  <select
                    className="form-select w-auto"
                    value={filterCommunity}
                    onChange={e => { setFilterCommunity(e.target.value); setCurrentPage(1); }}
                    title={(() => {
                      const meta = communities.find(c => c.value === filterCommunity);
                      if (!meta) return 'Все community';
                      const name = meta.name ? meta.name + ' — ' : '';
                      const desc = meta.description || '';
                      const tags = meta.tags && meta.tags.length ? ' (' + meta.tags.join(', ') + ')' : '';
                      return name + desc + tags;
                    })()}
                  >
                    <option value="">Все community</option>
                    {allCommunities.map(community => {
                      const meta = communities.find(c => c.value === community);
                      const label = meta && meta.name ? `${community} — ${meta.name}` : community;
                      const title = meta ? `${meta.name ? meta.name + ' — ' : ''}${meta.description || ''}${meta.tags && meta.tags.length ? ' (' + meta.tags.join(', ') + ')' : ''}` : community;
                      return (
                        <option key={community} value={community} title={title}>{label}</option>
                      );
                    })}
                  </select>
                  {/* Поиск */}
                  <div className="input-icon flex-grow-1">
                    <span className="input-icon-addon">
                      <IconSearch size={18} />
                    </span>
                    <input
                      type="text"
                      className="form-control"
                      placeholder="Поиск IP-диапазона..."
                      value={searchTerm}
                      onChange={e => { setSearchTerm(e.target.value); setCurrentPage(1); }}
                      aria-label="Поиск IP-диапазона"
                    />
                  </div>
                </div>
                <Tooltip content="Анализ и суммаризация IP-диапазонов">
                  <button className="btn btn-outline-primary" onClick={() => setAnalyzeOpen(true)}>
                    <IconDatabase className="icon me-2" />
                    Анализ
                  </button>
                </Tooltip>
              </div>
            </div>
            {/* Мета-информация будет показана внизу карточки */}
            {loading ? (
              <TableSkeleton rows={10} cols={3} />
            ) : paginatedItems.length === 0 ? (
              <TableEmpty cols={3}>
                <EmptyState
                  title="Нет IP-диапазонов"
                  description="Импортируйте или добавьте записи, чтобы начать."
                  action={<button className="btn btn-primary" onClick={handleImport}>Импорт</button>}
                  secondaryAction={<button className="btn btn-outline-primary" onClick={downloadSampleCsv}>Шаблон CSV</button>}
                />
              </TableEmpty>
            ) : (
            <div className="table-responsive">
              <table className="table card-table table-vcenter table-nowrap mb-0">
                <thead>
                  <tr>
                    <th style={{width: '40px'}}>
                      <input
                        type="checkbox"
                        className="form-check-input"
                        checked={paginatedItems.length > 0 && paginatedItems.every(i => selectedItems.has(i.ipRange))}
                        onChange={(e) => {
                          if (e.target.checked) {
                            selectAll();
                          } else {
                            deselectAll();
                          }
                        }}
                        title="Выбрать все на странице"
                      />
                    </th>
                    <th className="cursor-pointer user-select-none" onClick={() => handleSort('ipRange')}>
                      <div className="d-flex align-items-center">
                        <IconNetwork size={16} className="me-1 text-muted" />
                        IP-диапазон
                        {sortField === 'ipRange' && (
                          <span className="ms-1">
                            {sortOrder === 'asc' ? <IconArrowUp size={14} /> : <IconArrowDown size={14} />}
                          </span>
                        )}
                      </div>
                    </th>
                    <th className="cursor-pointer user-select-none" onClick={() => handleSort('community')}>
                      <div className="d-flex align-items-center">
                        <IconHash size={16} className="me-1 text-muted" />
                        Community
                        {sortField === 'community' && (
                          <span className="ms-1">
                            {sortOrder === 'asc' ? <IconArrowUp size={14} /> : <IconArrowDown size={14} />}
                          </span>
                        )}
                      </div>
                    </th>
                    <th className="text-end">Действия</th>
                  </tr>
                </thead>
                <tbody>
                  {paginatedItems.map((item, idx) => (
                    <tr key={item.ipRange} className={editingIp === item.ipRange ? 'table-active' : (selectedItems.has(item.ipRange) ? 'table-selected' : '')} style={{ animation: `fadeIn 0.3s ease ${idx * 0.02}s both` }}>
                      <td>
                        <input
                          type="checkbox"
                          className="form-check-input"
                          checked={selectedItems.has(item.ipRange)}
                          onChange={() => toggleSelectItem(item.ipRange)}
                          onClick={(e) => e.stopPropagation()}
                        />
                      </td>
                      <td className="font-monospace" title="CIDR">
                        <div className="d-flex align-items-center">
                          <IconNetwork size={16} className="me-2 text-muted" />
                          <span>{item.ipRange}</span>
                          <Tooltip content="Копировать IP-диапазон" position="top">
                            <button
                              className="btn btn-ghost-secondary btn-icon btn-sm ms-2"
                              onClick={() => copyToClipboard(item.ipRange)}
                              aria-label="Копировать"
                              title="Копировать IP-диапазон"
                            >
                              <IconCopy size={14} />
                            </button>
                          </Tooltip>
                        </div>
                      </td>
                      <td>{renderCommunityBadge(item.community)}</td>
                      <td className="text-end">
                        {editingIp === item.ipRange ? (
                          <>
                            <CommunityAutocompleteInput
                              value={editingValue}
                              onChange={setEditingValue}
                              communities={communities}
                              className={`form-control d-inline-block me-2${isValidCommunity(editingValue) ? '' : ' is-invalid'}`}
                              style={{ width: '150px' }}
                              onKeyDown={(e) => handleEditKeyDown(e, item.ipRange)}
                              useShortValue={true}
                            />
                            <Tooltip content="Сохранить (Enter)">
                              <button className="btn btn-success btn-icon btn-sm me-1" onClick={() => handleSaveEdit(item.ipRange)} disabled={!isValidCommunity(editingValue)}><IconCheck size={16} /></button>
                            </Tooltip>
                            <Tooltip content="Отмена (Esc)">
                              <button className="btn btn-secondary btn-icon btn-sm" onClick={handleCancelEdit}><IconX size={16} /></button>
                            </Tooltip>
                          </>
                        ) : (
                          <>
                            <Tooltip content="Редактировать" position="top">
                              <button className="btn btn-outline-primary btn-icon btn-sm me-1" aria-label="Редактировать" onClick={() => handleEdit(item)} title="Редактировать"><IconEdit size={16} /></button>
                            </Tooltip>
                            <Tooltip content="Копировать" position="top">
                              <button className="btn btn-outline-secondary btn-icon btn-sm me-1" aria-label="Копировать" onClick={() => copyToClipboard(`${item.ipRange} ${item.community}`)} title="Копировать"><IconCopy size={16} /></button>
                            </Tooltip>
                            <Tooltip content="Удалить" position="top">
                              <button className="btn btn-outline-danger btn-icon btn-sm" aria-label="Удалить" onClick={() => confirmDelete(item)} title="Удалить"><IconTrash size={16} /></button>
                            </Tooltip>
                          </>
                        )}
                      </td>
                    </tr>
                  ))}
                </tbody>
              </table>
            </div>
            )}
            {/* Пагинация */}
            <Pagination
              currentPage={currentPage}
              totalPages={totalPages}
              totalItems={totalItems || filtered.length}
              pageSize={pageSize}
              onPageChange={setCurrentPage}
            />
            <S3MetaBar keys={["ipRanges"]} />
          </div>
        </div>
      </div>

      <ConfirmDialog
        open={showDeleteModal}
        title={'Удалить IP-диапазон?'}
        message={!itemToDelete ? '' : `Вы уверены, что хотите удалить "${itemToDelete.ipRange}"? Это действие необратимо.`}
        confirmText={'Удалить'}
        cancelText={'Отмена'}
        destructive
        size={'sm'}
        onConfirm={executeDelete}
        onCancel={() => setShowDeleteModal(false)}
      />
      <ConfirmDiffModal
        show={confirmSaveOpen}
        diff={diff}
        onConfirm={performSave}
        onClose={() => setConfirmSaveOpen(false)}
      />
      <ImportModal
        show={importOpen}
        title={'Импорт IP-диапазонов'}
        description={'Формат: CIDR ПРОБЕЛ COMMUNITY'}
        parseLine={parseLine}
        validateItem={validateItem}
        onConfirm={applyImportedItems}
        onClose={() => setImportOpen(false)}
        sampleHeader={['ipRange','community']}
        placeholder={'192.168.1.0/24 65000:100'}
      />
      <HistoryModal
        resource="ip-ranges"
        show={historyOpen}
        onClose={() => setHistoryOpen(false)}
        onRolledBack={() => fetchItems()}
      />
      <WsUpdateModal
        show={wsOpen}
        url={wsUrl}
        onClose={() => setWsOpen(false)}
      />
      <ConfirmDialog
        open={clearCommunitiesOpen}
        title={'Удалить записи community'}
        message={`Будут удалены все IP-диапазоны с community "${filterCommunity}". Действие НЕ сохраняет изменения автоматически.`}
        confirmText={'Удалить'}
        cancelText={'Отмена'}
        onConfirm={() => { setItems(prev => prev.filter(i => i != null && i.community !== filterCommunity)); setClearCommunitiesOpen(false); }}
        onCancel={() => setClearCommunitiesOpen(false)}
      />
      {/* Analyze Settings Modal */}
      {analyzeOpen && (
        <div className="modal modal-blur fade show" style={{display: 'block'}} tabIndex="-1">
          <div className="modal-dialog modal-lg modal-dialog-centered" role="document">
            <div className="modal-content">
              <button type="button" className="btn-close" onClick={() => setAnalyzeOpen(false)}></button>
              <div className="modal-header">
                <h3 className="modal-title">Анализ IP-диапазонов</h3>
              </div>
              <div className="modal-body">
                <div className="row g-3">
                  <div className="col-md-6">
                    <label className="form-label">Community</label>
                    <select className="form-select" value={analyzeFilters.community} onChange={e => setAnalyzeFilters(f => ({ ...f, community: e.target.value }))}>
                      <option value="">Выберите community</option>
                      {allCommunities.map(val => (
                        <option key={val} value={val}>{val}</option>
                      ))}
                    </select>
                    <div className="form-text">Анализ выполняется в рамках одного выбранного community.</div>
                  </div>
                  <div className="col-md-6">
                    <div className="mb-3">
                      <label className="form-label">Диапазон масок</label>
                      <div className="row g-2 align-items-center">
                        <div className="col-auto">
                          <span className="form-help">от</span>
                        </div>
                        <div className="col">
                          <input type="number" className="form-control" min={0} max={32} value={analyzeFilters.minMask}
                            onChange={e => {
                              const v = Math.max(0, Math.min(32, Number(e.target.value)));
                              setAnalyzeFilters(f => ({ ...f, minMask: Math.min(v, f.maxMask) }));
                            }} />
                        </div>
                        <div className="col-auto">
                          <span className="form-help">до</span>
                        </div>
                        <div className="col">
                          <input type="number" className="form-control" min={0} max={32} value={analyzeFilters.maxMask}
                            onChange={e => {
                              const v = Math.max(0, Math.min(32, Number(e.target.value)));
                              setAnalyzeFilters(f => ({ ...f, maxMask: Math.max(v, f.minMask) }));
                            }} />
                        </div>
                      </div>
                      <div className="form-text">Учитываются только CIDR внутри выбранного диапазона масок.</div>
                    </div>
                    <div className="mb-3">
                      <label className="form-label">Тип адресов</label>
                      <div>
                        <label className="form-check form-check-inline">
                          <input className="form-check-input" type="radio" name="anType" value="any" checked={analyzeFilters.type === 'any'} onChange={() => setAnalyzeFilters(f => ({ ...f, type: 'any' }))} />
                          <span className="form-check-label">Любой</span>
                        </label>
                        <label className="form-check form-check-inline">
                          <input className="form-check-input" type="radio" name="anType" value="public" checked={analyzeFilters.type === 'public'} onChange={() => setAnalyzeFilters(f => ({ ...f, type: 'public' }))} />
                          <span className="form-check-label">Публичные</span>
                        </label>
                        <label className="form-check form-check-inline">
                          <input className="form-check-input" type="radio" name="anType" value="private" checked={analyzeFilters.type === 'private'} onChange={() => setAnalyzeFilters(f => ({ ...f, type: 'private' }))} />
                          <span className="form-check-label">Приватные</span>
                        </label>
                        <label className="form-check form-check-inline">
                          <input className="form-check-input" type="radio" name="anType" value="cgnat" checked={analyzeFilters.type === 'cgnat'} onChange={() => setAnalyzeFilters(f => ({ ...f, type: 'cgnat' }))} />
                          <span className="form-check-label">CGNAT</span>
                        </label>
                      </div>
                      <div className="form-text">Определение типа по первому IP в CIDR.</div>
                    </div>
                    <div className="mb-3">
                      <label className="form-label">Агрессивная агрегация</label>
                      <label className="form-check">
                        <input className="form-check-input" type="checkbox" checked={analyzeFilters.supernet16} onChange={e => setAnalyzeFilters(f => ({ ...f, supernet16: e.target.checked }))} />
                        <span className="form-check-label">Если в одном /16 более 2 префиксов — свернуть в /16</span>
                      </label>
                      <div className="form-text">Например: 157.240.12.0/23, 157.240.15.0/24, 157.240.16.0/23 → 157.240.0.0/16</div>
                    </div>
                  </div>
                </div>
              </div>
              <div className="modal-footer">
                <button className="btn" onClick={() => setAnalyzeOpen(false)}>Отмена</button>
                <button className="btn btn-primary" disabled={!analyzeFilters.community} onClick={() => { setAnalyzeOpen(false); setAnalyzeConfirmOpen(true); }}>Предпросмотр</button>
              </div>
            </div>
          </div>
        </div>
      )}
      {/* Analyze Confirm */}
      <ConfirmDialog
        open={analyzeConfirmOpen}
        title={'Подтвердить анализ'}
        message={buildAnalysisConfirmText()}
        confirmText={'Запустить'}
        cancelText={'Отмена'}
        onConfirm={() => { setAnalyzeConfirmOpen(false); runAnalysis(); }}
        onCancel={() => setAnalyzeConfirmOpen(false)}
      />
      {/* Analysis Results Modal */}
      {analysisResultsOpen && (
        <div className="modal modal-blur fade show" style={{display: 'block'}} tabIndex="-1">
          <div className="modal-dialog modal-lg modal-dialog-centered" role="document">
            <div className="modal-content">
              <button type="button" className="btn-close" onClick={() => setAnalysisResultsOpen(false)}></button>
              <div className="modal-header">
                <h3 className="modal-title">Результаты анализа</h3>
              </div>
              <div className="modal-body">
                {!analysisPreview ? (
                  <div className="text-center text-muted">Нет данных по заданным фильтрам</div>
                ) : (
                  <>
                    <div className="mb-2">
                      <strong>Community:</strong> {renderCommunityBadge(analysisPreview.community)}
                    </div>
                    <div className="row g-3 mb-2">
                      <div className="col-md-4">
                        <div className="card"><div className="card-body">
                          <div className="text-muted">Было (всего в community)</div>
                          <div className="h2 m-0">{analysisPreview.totalBefore}</div>
                        </div></div>
                      </div>
                      <div className="col-md-4">
                        <div className="card"><div className="card-body">
                          <div className="text-muted">Обработано (по фильтрам)</div>
                          <div className="h2 m-0">{analysisPreview.processedBefore}</div>
                        </div></div>
                      </div>
                      <div className="col-md-4">
                        <div className="card"><div className="card-body">
                          <div className="text-muted">Станет (после суммаризации)</div>
                          <div className="h2 m-0">{analysisPreview.totalAfter}</div>
                        </div></div>
                      </div>
                    </div>
                    <div className="row g-3">
                      <div className="col-md-6">
                        <div className="card">
                          <div className="card-header"><h4 className="card-title">Исходные (учтенные по фильтрам) — {analysisPreview.processedBefore}</h4></div>
                          <div className="card-body" style={{maxHeight: 220, overflow: 'auto'}}>
                            {analysisPreview.beforeCidrs.length === 0 ? (
                              <div className="text-muted">—</div>
                            ) : (
                              <ul className="list-unstyled m-0">
                                {analysisPreview.beforeCidrs.map(c => (<li key={c}><code>{c}</code></li>))}
                              </ul>
                            )}
                          </div>
                        </div>
                      </div>
                      <div className="col-md-6">
                        <div className="card">
                          <div className="card-header"><h4 className="card-title">После суммаризации — {analysisPreview.processedAfter}</h4></div>
                          <div className="card-body" style={{maxHeight: 220, overflow: 'auto'}}>
                            {analysisPreview.afterCidrs.length === 0 ? (
                              <div className="text-muted">—</div>
                            ) : (
                              <ul className="list-unstyled m-0">
                                {analysisPreview.afterCidrs.map(c => (<li key={c}><code>{c}</code></li>))}
                              </ul>
                            )}
                          </div>
                        </div>
                      </div>
                    </div>
                    <div className="form-text mt-2">Неизменные (вне фильтров): {analysisPreview.unchangedCount}</div>
                  </>
                )}
              </div>
              <div className="modal-footer">
                <button className="btn" onClick={() => setAnalysisResultsOpen(false)}>Закрыть</button>
                <button className="btn btn-primary" disabled={!analysisPreview} onClick={() => setOverwriteConfirmOpen(true)}>
                  <IconDeviceFloppy className="icon me-2" />Применить изменения
                </button>
              </div>
            </div>
          </div>
        </div>
      )}
      {/* Overwrite confirm */}
      <ConfirmDialog
        open={overwriteConfirmOpen}
        title={'Перезаписать диапазоны в community?'}
        message={!analysisPreview ? '' : `Community: ${analysisPreview.community}\nБыло: ${analysisPreview.totalBefore}\nСтанет: ${analysisPreview.totalAfter}\nИзменится только выбранное community. Это действие изменит список, но не сохранит его в S3 до нажатия «Сохранить».`}
        confirmText={'Перезаписать'}
        cancelText={'Отмена'}
        onConfirm={applyAnalysisToItems}
        onCancel={() => setOverwriteConfirmOpen(false)}
      />
      {/* Diff Modal */}
      {showDiff && (
        <div className="modal modal-blur fade show" style={{display: 'block'}} tabIndex="-1">
          <div className="modal-dialog modal-lg modal-dialog-centered" role="document">
            <div className="modal-content">
              <button type="button" className="btn-close" onClick={() => setShowDiff(false)}></button>
              <div className="modal-header"><h3 className="modal-title">Изменения</h3></div>
              <div className="modal-body">
                <div className="row g-3">
                  <div className="col-md-4"><div className="card"><div className="card-body"><strong>Добавлено</strong><div className="text-muted">{diff.added.length}</div></div></div></div>
                  <div className="col-md-4"><div className="card"><div className="card-body"><strong>Удалено</strong><div className="text-muted">{diff.removed.length}</div></div></div></div>
                  <div className="col-md-4"><div className="card"><div className="card-body"><strong>Изменено</strong><div className="text-muted">{diff.changed.length}</div></div></div></div>
                </div>
              </div>
              <div className="modal-footer">
                <button className="btn" onClick={() => setShowDiff(false)}>Закрыть</button>
              </div>
            </div>
          </div>
        </div>
      )}
      {/* datalist больше не нужен, т.к. используем кастомный автокомплит */}
    </>
  );
}

export default IPRangesManager;