using System;
using System.Collections.Generic;
using System.Collections.ObjectModel;
using System.ComponentModel;
using System.Diagnostics;
using System.Linq;
using System.Security.Principal;
using System.ServiceProcess;
using System.Threading.Tasks;
using System.Windows;
using System.Windows.Controls;
using System.Windows.Controls.Primitives;
using System.Windows.Data;
using System.Windows.Input;
using System.Windows.Interop;
using System.Windows.Media;
using System.Windows.Threading;
using JJServiceManager.Remote;
using Forms = System.Windows.Forms;

namespace JJServiceManager
{
    /// <summary>초기화면</summary>
    public sealed class MainWindow : Window
    {
        private static readonly TimeSpan OpTimeout = TimeSpan.FromSeconds(60);

        private readonly AppSettings _settings;
        private readonly FrameworkElement _root;
        private readonly ObservableCollection<HostGroup> _groups = new ObservableCollection<HostGroup>();
        private readonly HostGroup _local;
        private readonly LogPanel _log;
        private readonly LogWindowManager _logWindows;
        private readonly DispatcherTimer _statusTimer;
        private readonly RemoteServer _remoteServer;
        private readonly PassiveHub _passiveHub;
        private RemoteIndicatorWindow _indicator;
        private readonly Dictionary<string, RemoteViewerWindow> _viewers = new Dictionary<string, RemoteViewerWindow>(StringComparer.OrdinalIgnoreCase);
        private string _passiveKey = "";
        private string _passiveListenKey = "";

        private readonly TabControl _tabs;
        private readonly TabItem _tabAll;
        private readonly ComboBox _cmbAddTab;
        private readonly CheckBox _chkAll;
        private readonly TextBlock _txtCount, _txtLogHidden;
        private readonly ContentControl _ccLog;
        private readonly FrameworkElement _pnlShutdown;
        private readonly Dictionary<string, TabItem> _hostTabs = new Dictionary<string, TabItem>(StringComparer.OrdinalIgnoreCase);

        /// <summary>원격 접속 허용 쪽에 넘겨줄 등록 서비스 목록 (다른 스레드에서 읽음)</summary>
        private volatile IReadOnlyList<ServiceEntry> _servicesSnapshot = Array.Empty<ServiceEntry>();
        private string _serverKey = "";
        private string _targetsKey = "";

        private Forms.NotifyIcon _tray;
        private HotkeyManager _hotkey;
        private bool _exiting;
        private bool _refreshing;
        private bool _trayTipShown;
        private bool _modalOpen;

        public MainWindow(AppSettings settings)
        {
            _settings = settings;

            Title = "JJServiceManager - 서비스 관리" + AppInstance.TitleTag;
            FontFamily = new FontFamily("Malgun Gothic");
            FontSize = 13;
            Background = Brushes2.Make("#F5F7F8");
            MinWidth = 860;
            MinHeight = 560;
            AppIcon.Apply(this);
            RestoreWindowBounds(settings);

            _root = XamlLoader.LoadElement("MainWindow.xaml");
            Content = _root;

            _tabs = _root.Find<TabControl>("tabHosts");
            _tabAll = _root.Find<TabItem>("tabAll");
            _cmbAddTab = _root.Find<ComboBox>("cmbAddTab");
            _chkAll = _root.Find<CheckBox>("chkAll");
            _txtCount = _root.Find<TextBlock>("txtCount");
            _txtLogHidden = _root.Find<TextBlock>("txtLogHidden");
            _ccLog = _root.Find<ContentControl>("ccLog");
            _pnlShutdown = _root.Find<FrameworkElement>("pnlShutdown");

            _log = new LogPanel { ShowTimestamp = true };
            _ccLog.Content = _log;

            _logWindows = new LogWindowManager(() => _settings, SaveSettings, LogChoices);

            // 내 PC
            _local = new HostGroup
            {
                Id = HostGroup.LocalId,
                Title = $"내 PC ({Environment.MachineName})",
                EmptyText = "[추가] 버튼을 눌러 관리할 서비스를 등록하세요."
            };
            foreach (var e in settings.Services) _local.Rows.Add(new ServiceRow(e, _local));
            _local.Rows.CollectionChanged += (s, e) => UpdateCounts();
            _groups.Add(_local);
            UpdateSnapshot();

            _root.Find<ItemsControl>("icGroups").ItemsSource = _groups;
            _cmbAddTab.ItemsSource = _groups;
            _cmbAddTab.SelectionChanged += OnAddTabSelected;
            _tabs.SelectionChanged += (s, e) => { if (e.Source == _tabs) UpdateCounts(); };

            // 상단 버튼
            _root.Find<Button>("btnAdd").Click += (s, e) => AddServices();
            _root.Find<Button>("btnDelete").Click += (s, e) => DeleteChecked();
            _root.Find<Button>("btnStartChecked").Click += async (s, e) => await RunChecked(true);
            _root.Find<Button>("btnStopChecked").Click += async (s, e) => await RunChecked(false);
            _root.Find<Button>("btnShutdown").Click += (s, e) => Shutdown(false);
            _root.Find<Button>("btnRestart").Click += (s, e) => Shutdown(true);
            _root.Find<Button>("btnSettings").Click += (s, e) => OpenSettings();
            _root.Find<Button>("btnExit").Click += (s, e) => ExitApp();
            _chkAll.Click += (s, e) =>
            {
                bool v = _chkAll.IsChecked == true;
                foreach (var r in VisibleRows()) r.IsChecked = v;
            };

            // 서비스 줄의 Start / Stop / Status / Log 버튼 (모든 탭)
            _tabs.AddHandler(ButtonBase.ClickEvent, new RoutedEventHandler(OnRowButton));
            // 우클릭: 로그 경로 지정 메뉴
            _tabs.AddHandler(UIElement.PreviewMouseRightButtonUpEvent, new MouseButtonEventHandler(OnRowRightClick), true);

            PreviewKeyDown += OnPreviewKeyDown;

            // 처음 뜰 때 다른 창 뒤에 가려지지 않도록 맨 앞으로
            ContentRendered += (s, e) =>
            {
                Activate();
                Topmost = true;
                Topmost = false;
            };

            // 내 PC 상태 자동 갱신 (2초)
            _statusTimer = new DispatcherTimer { Interval = TimeSpan.FromSeconds(2) };
            _statusTimer.Tick += async (s, e) => await RefreshStatuses(false);

            // 창 핸들을 미리 만들어 트레이 시작 상태에서도 단축키가 동작하게 함
            new WindowInteropHelper(this).EnsureHandle();
            _hotkey = new HotkeyManager(new WindowInteropHelper(this).Handle);
            _hotkey.Pressed += ToggleVisibility;

            // 원격 접속 허용 (대상 역할)
            _remoteServer = new RemoteServer(
                () => _servicesSnapshot,
                (m, l) => Log(m, l),
                () => Dispatcher.BeginInvoke(new Action(() => _ = RefreshStatuses(true))),
                () => new ScreenPolicy(_settings.RemoteAllowView, _settings.RemoteAllowView && _settings.RemoteAllowControl, _settings.RemoteRequireApproval),
                (who, control) => Dispatcher.InvokeAsync(() => ApprovalWindow.AskAsync(who, control)).Task.Unwrap());
            _remoteServer.ScreenViewersChanged += list => Dispatcher.BeginInvoke(new Action(() =>
            {
                if (_indicator == null)
                {
                    _indicator = new RemoteIndicatorWindow();
                    _indicator.DisconnectRequested += () =>
                    {
                        Log("[원격 화면] 이 PC에서 연결 끊기", LogLevel.Warning);
                        _remoteServer.StopAllScreens();
                    };
                }
                _indicator.Update(list);
            }));

            // 관리 PC: Passive 대상 PC의 접속을 받는 곳
            _passiveHub = new PassiveHub((m, l) => Log(m, l));

            CreateTray();

            Log("프로그램 시작" + (IsAdmin() ? " (관리자 권한)" : "") + AppInstance.TitleTag, LogLevel.Notice);
            if (!IsAdmin()) Log("관리자 권한이 아닙니다. 서비스 Start/Stop이 실패할 수 있습니다.", LogLevel.Warning);
            if (_local.Rows.Count == 0) Log("[추가] 버튼을 눌러 관리할 서비스를 등록하세요.");

            ApplySettings(startup: true);
            RestoreHostTabs();
            UpdateCounts();

            _ = RefreshStatuses(true);
            _statusTimer.Start();

            // 컴퓨터 시작시 기동이 켜져 있으면 실행 파일 위치가 바뀌었을 경우를 대비해 다시 등록
            if (_settings.RunAtStartup) Task.Run(() => StartupManager.Enable());
        }

        // ───────────────────────── 로그 ─────────────────────────

        private void Log(string text, LogLevel level = LogLevel.Info)
        {
            if (!Dispatcher.CheckAccess())
            {
                Dispatcher.BeginInvoke(new Action(() => Log(text, level)));
                return;
            }
            OperationLogFile.Append(DateTime.Now, text);
            if (_settings.ShowOperationLog) _log.Add(text, level);
        }

        // ───────────────────────── 목록 / 탭 ─────────────────────────

        private IEnumerable<ServiceRow> AllRows() => _groups.SelectMany(g => g.Rows);

        /// <summary>지금 보고 있는 탭의 서비스</summary>
        private IEnumerable<ServiceRow> VisibleRows()
        {
            if (_tabs.SelectedItem is TabItem t && t != _tabAll && t.Tag is string id)
                return _groups.FirstOrDefault(g => g.Id == id)?.Rows ?? Enumerable.Empty<ServiceRow>();
            return AllRows();
        }

        private void UpdateCounts()
        {
            var rows = VisibleRows().ToList();
            int running = rows.Count(r => r.Status == ServiceControllerStatus.Running);
            _txtCount.Text = rows.Count == 0 ? "" : $"{rows.Count}개 · 실행 중 {running}";
        }

        private void UpdateSnapshot()
            => _servicesSnapshot = _local.Rows.Select(r => r.Entry).ToList();

        private void SyncEntriesFromRows()
        {
            _settings.Services = _local.Rows.Select(r => r.Entry).ToList();
            UpdateSnapshot();
            SaveSettings();
            _logWindows.ChoicesChanged();
        }

        private void OnAddTabSelected(object sender, SelectionChangedEventArgs e)
        {
            if (_cmbAddTab.SelectedItem is not HostGroup g) return;
            OpenHostTab(g.Id, select: true);
            // 다시 고를 수 있도록 선택 해제
            Dispatcher.BeginInvoke(new Action(() => _cmbAddTab.SelectedItem = null));
        }

        /// <summary>PC 하나만 보여주는 탭 열기</summary>
        private void OpenHostTab(string id, bool select)
        {
            var group = _groups.FirstOrDefault(g => g.Id == id);
            if (group == null) return;

            if (_hostTabs.TryGetValue(id, out var existing))
            {
                if (select) _tabs.SelectedItem = existing;
                return;
            }

            var title = new TextBlock { DataContext = group, VerticalAlignment = VerticalAlignment.Center };
            title.SetBinding(TextBlock.TextProperty, new Binding(nameof(HostGroup.Title)));

            var list = new ItemsControl
            {
                ItemTemplate = (DataTemplate)_root.FindResource("GroupTemplate"),
                ItemsSource = new[] { group },
                Margin = new Thickness(4)
            };
            var tab = new TabItem
            {
                Tag = id,
                Content = new ScrollViewer { VerticalScrollBarVisibility = ScrollBarVisibility.Auto, Content = list }
            };
            tab.Header = LogWindowManager.TabHeader(title, () => CloseHostTab(id));

            _hostTabs[id] = tab;
            _tabs.Items.Add(tab);
            if (select) _tabs.SelectedItem = tab;
            SaveOpenTabs();
        }

        private void CloseHostTab(string id, bool save = true)
        {
            if (!_hostTabs.TryGetValue(id, out var tab)) return;
            if (_tabs.SelectedItem == tab) _tabs.SelectedItem = _tabAll;
            _tabs.Items.Remove(tab);
            _hostTabs.Remove(id);
            if (save) SaveOpenTabs();
        }

        private void SaveOpenTabs()
        {
            _settings.OpenHostTabs = _hostTabs.Keys.ToList();
            SaveSettings();
        }

        private void RestoreHostTabs()
        {
            foreach (var id in _settings.OpenHostTabs.ToList()) OpenHostTab(id, select: false);
            // 없어진 PC 탭은 정리
            _settings.OpenHostTabs = _hostTabs.Keys.ToList();
        }

        // ───────────────────────── 내 PC 서비스 추가 / 삭제 ─────────────────────────

        private void AddServices()
        {
            if (_modalOpen) return;
            var picker = new ServicePickerWindow(_local.Rows.Select(r => r.ServiceName)) { Owner = this };
            bool? ok;
            _modalOpen = true;
            try { ok = picker.ShowDialog(); }
            finally { _modalOpen = false; }
            if (ok != true || picker.Result == null) return;

            var chosen = picker.Result;
            var chosenNames = new HashSet<string>(chosen.Select(c => c.ServiceName), StringComparer.OrdinalIgnoreCase);

            // 체크 해제된 기존 항목은 목록에서 뺌
            var removed = _local.Rows.Where(r => !chosenNames.Contains(r.ServiceName)).ToList();
            foreach (var r in removed)
            {
                _local.Rows.Remove(r);
                _logWindows.Close("local|" + r.ServiceName);
            }

            // 새로 체크된 항목 추가 (기존 순서 유지, 새 항목은 뒤에)
            var existing = new HashSet<string>(_local.Rows.Select(r => r.ServiceName), StringComparer.OrdinalIgnoreCase);
            var added = new List<string>();
            foreach (var c in chosen)
            {
                if (existing.Contains(c.ServiceName)) continue;
                _local.Rows.Add(new ServiceRow(new ServiceEntry { ServiceName = c.ServiceName, DisplayName = c.DisplayName }, _local));
                added.Add(c.DisplayName);
            }

            if (added.Count > 0) Log($"서비스 추가: {string.Join(", ", added)}", LogLevel.Success);
            if (removed.Count > 0) Log($"목록에서 제외: {string.Join(", ", removed.Select(r => r.DisplayName))}");
            if (added.Count == 0 && removed.Count == 0) Log("변경 사항 없음");

            SyncEntriesFromRows();
            _ = RefreshStatuses(true);
        }

        private void DeleteChecked()
        {
            var checkedRows = AllRows().Where(r => r.IsChecked).ToList();
            var targets = checkedRows.Where(r => !r.IsRemote).ToList();
            if (targets.Count == 0)
            {
                Dialogs.Info(this, checkedRows.Count > 0
                    ? "원격 PC의 서비스는 여기서 삭제할 수 없습니다. (대상 PC에서 관리)\n삭제할 내 PC 서비스를 체크하세요."
                    : "삭제할 서비스를 체크하세요.");
                return;
            }
            var names = string.Join("\n", targets.Select(t => " · " + t.DisplayName));
            var note = checkedRows.Count > targets.Count ? "\n\n체크한 원격 서비스는 삭제 대상에서 제외됩니다." : "";
            if (!Dialogs.Confirm(this, $"아래 {targets.Count}개 서비스를 목록에서 삭제할까요?\n\n{names}\n\n(Windows 서비스 자체는 그대로 유지됩니다){note}", "삭제"))
                return;

            foreach (var t in targets)
            {
                _local.Rows.Remove(t);
                _logWindows.Close("local|" + t.ServiceName);
            }
            _chkAll.IsChecked = false;
            Log($"목록에서 삭제: {string.Join(", ", targets.Select(t => t.DisplayName))}");
            SyncEntriesFromRows();
        }

        // ───────────────────────── 숫자 6자리 확인 ─────────────────────────

        private bool NeedsCode(IEnumerable<ServiceRow> rows)
            => rows.Any(r => r.IsRemote ? _settings.ConfirmRemoteStartStop : _settings.ConfirmLocalStartStop);

        /// <summary>설정에 따라 숫자 확인창을 띄움. 실행해도 되면 true</summary>
        private bool ConfirmStartStop(bool start, IList<ServiceRow> rows)
        {
            if (!NeedsCode(rows)) return true;
            if (_modalOpen) return false;

            var what = start ? "시작" : "중지";
            var list = string.Join("\n", rows.Take(8).Select(r => " · " + (r.IsRemote ? $"[{r.HostPrefix}] " : "") + r.DisplayName));
            if (rows.Count > 8) list += $"\n · 외 {rows.Count - 8}개";

            bool ok;
            _modalOpen = true;
            try
            {
                ok = CodeConfirmWindow.Ask(this, "서비스 " + what, $"아래 서비스를 {what}합니다.\n\n{list}", "서비스 " + what);
            }
            finally { _modalOpen = false; }
            if (!ok) Log($"서비스 {what} 취소", LogLevel.Info);
            return ok;
        }

        // ───────────────────────── Start / Stop / Status / Log ─────────────────────────

        private async void OnRowButton(object sender, RoutedEventArgs e)
        {
            if (e.OriginalSource is Button hb && hb.DataContext is HostGroup hg && hb.Tag as string == "remoteDesktop")
            {
                e.Handled = true;
                OpenRemoteDesktop(hg);
                return;
            }
            if (e.OriginalSource is not Button b || b.DataContext is not ServiceRow row) return;
            switch (b.Tag as string)
            {
                case "start":
                    if (ConfirmStartStop(true, new[] { row })) await StartService(row);
                    break;
                case "stop":
                    if (ConfirmStartStop(false, new[] { row })) await StopService(row);
                    break;
                case "status": await ShowStatus(row); break;
                case "log": OpenLog(row, b); break;
            }
        }

        private Task StartService(ServiceRow row) => row.IsRemote ? RemoteStartStop(row, true) : LocalStartStop(row, true);
        private Task StopService(ServiceRow row) => row.IsRemote ? RemoteStartStop(row, false) : LocalStartStop(row, false);

        private async Task LocalStartStop(ServiceRow row, bool start)
        {
            if (row.IsBusy) return;
            var what = start ? "시작" : "중지";
            row.IsBusy = true;
            Log($"{row.LogName} {what} 요청");
            var sw = Stopwatch.StartNew();
            try
            {
                await Task.Run(() =>
                {
                    if (start) ServiceOps.Start(row.ServiceName, OpTimeout);
                    else ServiceOps.Stop(row.ServiceName, OpTimeout);
                });
                Log($"{row.LogName} {what} 완료 ({sw.Elapsed.TotalSeconds:0.0}초)", LogLevel.Success);
            }
            catch (InfoException ex) { Log($"{row.LogName} {ex.Message}", LogLevel.Warning); }
            catch (Exception ex) { Log($"{row.LogName} {what} 실패: {ServiceOps.Describe(ex)}", LogLevel.Error); }
            finally
            {
                row.IsBusy = false;
                await RefreshStatuses(true);
            }
        }

        private async Task RemoteStartStop(ServiceRow row, bool start)
        {
            if (row.IsBusy) return;
            var client = row.Host.Client;
            var what = start ? "시작" : "중지";
            row.IsBusy = true;
            Log($"{row.LogName} {what} 요청 (원격)");
            try
            {
                var r = start ? await client.StartServiceAsync(row.ServiceName) : await client.StopServiceAsync(row.ServiceName);
                double sec = 0;
                try { sec = r["seconds"]?.GetValue<double>() ?? 0; } catch { }
                Log($"{row.LogName} {what} 완료 ({sec:0.0}초)", LogLevel.Success);
            }
            catch (RemoteException ex) when (ex.IsInfo) { Log($"{row.LogName} {ex.Message}", LogLevel.Warning); }
            catch (Exception ex) { Log($"{row.LogName} {what} 실패: {RemoteClient.Friendly(ex)}", LogLevel.Error); }
            finally
            {
                row.IsBusy = false;
            }
        }

        private async Task RunChecked(bool start)
        {
            var targets = AllRows().Where(r => r.IsChecked).ToList();
            var what = start ? "시작" : "중지";
            if (targets.Count == 0)
            {
                Dialogs.Info(this, $"{what}할 서비스를 체크하세요.");
                return;
            }
            // 여러 개를 한꺼번에 할 때는 숫자를 한 번만 입력
            if (!ConfirmStartStop(start, targets)) return;

            Log($"선택한 {targets.Count}개 서비스 {what}", LogLevel.Notice);
            foreach (var r in targets)
            {
                if (start) await StartService(r);
                else await StopService(r);
            }
        }

        private async Task ShowStatus(ServiceRow row)
        {
            try
            {
                var lines = row.IsRemote
                    ? await row.Host.Client.GetDetailsAsync(row.ServiceName)
                    : await Task.Run(() => ServiceOps.GetDetails(row.ServiceName));
                Log($"{row.LogName} 상태 정보", LogLevel.Notice);
                foreach (var l in lines) Log("    " + l);
            }
            catch (Exception ex)
            {
                var msg = row.IsRemote ? RemoteClient.Friendly(ex) : ServiceOps.Describe(ex);
                Log($"{row.LogName} 상태 조회 실패: {msg}", LogLevel.Error);
            }
            if (!row.IsRemote) await RefreshStatuses(true);
        }

        private void OpenLog(ServiceRow row, FrameworkElement anchor)
        {
            if (row.IsRemote)
            {
                if (!row.HasLog)
                {
                    Dialogs.Info(this, $"{row.Host.Title} 에서 [{row.DisplayName}]의 로그 경로가 지정되지 않았습니다.\n대상 PC의 JJServiceManager에서 Log 버튼으로 경로를 지정하세요.");
                    return;
                }
                _logWindows.Open(RemoteLogTarget(row));
                return;
            }

            if (!row.HasLog)
            {
                // 경로가 없으면 파일/폴더 중 선택
                ShowLogMenu(row, anchor, includeView: false);
                return;
            }
            _logWindows.Open(LogTarget.ForLocal(row.Entry));
        }

        private static LogTarget RemoteLogTarget(ServiceRow row)
        {
            var client = row.Host.Client;
            var entry = row.Entry;
            var svc = row.ServiceName;
            return new LogTarget
            {
                Key = $"remote|{row.Host.Id}|{svc}",
                Title = $"{row.HostPrefix} - {row.DisplayName}",
                PathText = () => "대상 PC " + (entry.LogIsFolder ? "폴더: " : "파일: ") + entry.LogPath,
                IsLocal = false,
                CreateSource = (t, output) => new RemoteLogSource(client, svc, () => t.Encoding, output)
            };
        }

        // ───────────────────────── 원격관리 (화면 보기 / 제어) ─────────────────────────

        private void OpenRemoteDesktop(HostGroup g)
        {
            if (g.IsLocal || g.Client == null) return;
            if (_viewers.TryGetValue(g.Id, out var existing))
            {
                if (existing.WindowState == WindowState.Minimized) existing.WindowState = WindowState.Normal;
                existing.Activate();
                return;
            }
            if (g.Client.State != RemoteState.Connected)
            {
                Dialogs.Info(this, $"{g.Title} 에 연결되어 있지 않습니다.\n({g.StatusText})");
                return;
            }
            if (!g.Client.AllowView)
            {
                Dialogs.Info(this, $"{g.Title} 에서 화면 보기를 허용하지 않았습니다.\n대상 PC 설정 → 원격 접속 허용 → 원격관리에서 '화면 보기 허용'을 켜야 합니다.");
                return;
            }

            // 원격관리는 항상 숫자 6자리 확인
            if (_modalOpen) return;
            bool ok;
            _modalOpen = true;
            try
            {
                ok = CodeConfirmWindow.Ask(this, "원격관리",
                    $"{g.Title} 의 화면을 {(g.Client.AllowControl ? "보고 키보드·마우스로 제어" : "봅")}니다.",
                    "원격관리 시작");
            }
            finally { _modalOpen = false; }
            if (!ok)
            {
                Log($"[{g.Prefix}] 원격관리 취소");
                return;
            }

            Log($"[{g.Prefix}] 원격관리 시작 ({(g.Client.AllowControl ? "보기 + 제어" : "보기")})", LogLevel.Notice);
            var v = new RemoteViewerWindow(g.Id, g.Client, g.Title);
            v.Closed += (s, e) =>
            {
                _viewers.Remove(g.Id);
                Log($"[{g.Prefix}] 원격관리 끝");
            };
            _viewers[g.Id] = v;
            v.Show();
        }

        /// <summary>좌우 분할 창에서 고를 수 있는 로그 (내 PC + 원격)</summary>
        private List<LogTarget> LogChoices()
        {
            var list = new List<LogTarget>();
            foreach (var r in _local.Rows.Where(r => r.HasLog)) list.Add(LogTarget.ForLocal(r.Entry));
            foreach (var g in _groups.Where(g => !g.IsLocal))
                foreach (var r in g.Rows.Where(r => r.HasLog)) list.Add(RemoteLogTarget(r));
            return list;
        }

        private void OnRowRightClick(object sender, MouseButtonEventArgs e)
        {
            var fe = e.OriginalSource as FrameworkElement;
            while (fe != null && fe.DataContext is not ServiceRow) fe = VisualTreeHelper.GetParent(fe) as FrameworkElement;
            if (fe?.DataContext is ServiceRow row)
            {
                if (row.IsRemote)
                {
                    // 원격 서비스: 로그 경로는 대상 PC에서 지정
                    if (row.HasLog)
                    {
                        var menu = new ContextMenu { PlacementTarget = fe, Placement = PlacementMode.MousePoint };
                        var view = new MenuItem { Header = "로그 보기", FontWeight = FontWeights.Bold };
                        view.Click += (s, a) => _logWindows.Open(RemoteLogTarget(row));
                        menu.Items.Add(view);
                        menu.Items.Add(new MenuItem { Header = "대상 PC 로그: " + row.Entry.LogPath, IsEnabled = false });
                        menu.IsOpen = true;
                    }
                }
                else
                {
                    ShowLogMenu(row, e.OriginalSource as FrameworkElement ?? fe, includeView: true);
                }
                e.Handled = true;
            }
        }

        private void ShowLogMenu(ServiceRow row, FrameworkElement anchor, bool includeView)
        {
            var menu = new ContextMenu { PlacementTarget = anchor, Placement = PlacementMode.MousePoint };

            if (includeView && row.HasLog)
            {
                var view = new MenuItem { Header = "로그 보기", FontWeight = FontWeights.Bold };
                view.Click += (s, e) => _logWindows.Open(LogTarget.ForLocal(row.Entry));
                menu.Items.Add(view);
                menu.Items.Add(new Separator());
            }

            var file = new MenuItem { Header = "로그 파일 지정…" };
            file.Click += (s, e) => PickLogFile(row);
            menu.Items.Add(file);

            var folder = new MenuItem { Header = "로그 폴더 지정… (가장 최근 파일 자동 표시)" };
            folder.Click += (s, e) => PickLogFolder(row);
            menu.Items.Add(folder);

            if (row.HasLog)
            {
                menu.Items.Add(new Separator());
                var cur = new MenuItem { Header = (row.Entry.LogIsFolder ? "현재 폴더: " : "현재 파일: ") + row.Entry.LogPath, IsEnabled = false };
                menu.Items.Add(cur);
                var clear = new MenuItem { Header = "로그 경로 해제" };
                clear.Click += (s, e) =>
                {
                    row.Entry.LogPath = "";
                    row.Entry.LogIsFolder = false;
                    row.LogPathChanged();
                    Log($"{row.LogName} 로그 경로 해제");
                    SyncEntriesFromRows();
                    _logWindows.LocalPathChanged(row.Entry);
                };
                menu.Items.Add(clear);
            }

            menu.IsOpen = true;
        }

        private void PickLogFile(ServiceRow row)
        {
            var dlg = new Microsoft.Win32.OpenFileDialog
            {
                Title = $"{row.DisplayName} - 로그 파일 선택",
                Filter = "로그 파일 (*.log;*.txt)|*.log;*.txt|모든 파일 (*.*)|*.*",
                CheckFileExists = true
            };
            if (row.HasLog)
            {
                try
                {
                    dlg.InitialDirectory = row.Entry.LogIsFolder
                        ? row.Entry.LogPath
                        : System.IO.Path.GetDirectoryName(row.Entry.LogPath);
                }
                catch { }
            }
            if (dlg.ShowDialog(this) != true) return;

            row.Entry.LogPath = dlg.FileName;
            row.Entry.LogIsFolder = false;
            row.LogPathChanged();
            Log($"{row.LogName} 로그 파일 지정: {dlg.FileName}");
            SyncEntriesFromRows();
            _logWindows.LocalPathChanged(row.Entry);
            _logWindows.Open(LogTarget.ForLocal(row.Entry));
        }

        private void PickLogFolder(ServiceRow row)
        {
            var dlg = new Microsoft.Win32.OpenFolderDialog
            {
                Title = $"{row.DisplayName} - 로그 폴더 선택 (가장 최근 파일을 자동으로 표시)"
            };
            if (row.HasLog)
            {
                try
                {
                    dlg.InitialDirectory = row.Entry.LogIsFolder
                        ? row.Entry.LogPath
                        : System.IO.Path.GetDirectoryName(row.Entry.LogPath);
                }
                catch { }
            }
            if (dlg.ShowDialog(this) != true) return;

            row.Entry.LogPath = dlg.FolderName;
            row.Entry.LogIsFolder = true;
            row.LogPathChanged();
            Log($"{row.LogName} 로그 폴더 지정: {dlg.FolderName}");
            SyncEntriesFromRows();
            _logWindows.LocalPathChanged(row.Entry);
            _logWindows.Open(LogTarget.ForLocal(row.Entry));
        }

        // ───────────────────────── 내 PC 상태 자동 갱신 ─────────────────────────

        private async Task RefreshStatuses(bool force)
        {
            if (_refreshing && !force) return;
            _refreshing = true;
            try
            {
                var names = _local.Rows.Select(r => r.ServiceName).ToList();
                var result = await Task.Run(() => names.Distinct(StringComparer.OrdinalIgnoreCase)
                    .ToDictionary(n => n, n => ServiceOps.GetStatus(n), StringComparer.OrdinalIgnoreCase));

                foreach (var r in _local.Rows)
                {
                    if (!result.TryGetValue(r.ServiceName, out var st)) continue;
                    if (r.StatusKnown && r.Status != st && !r.IsBusy) LogStatusChange(r, r.Status, st);
                    r.Status = st;
                }
                UpdateCounts();
            }
            catch
            {
                // 다음 주기에 다시 시도
            }
            finally
            {
                _refreshing = false;
            }
        }

        private void LogStatusChange(ServiceRow r, ServiceControllerStatus? from, ServiceControllerStatus? to)
        {
            Log($"{r.LogName} 상태 변경: {ServiceOps.StatusText(from)} → {ServiceOps.StatusText(to)}",
                to == ServiceControllerStatus.Running ? LogLevel.Success
                : to == ServiceControllerStatus.Stopped ? LogLevel.Warning : LogLevel.Info);
        }

        // ───────────────────────── 원격: 다른 PC 관리 (관리 역할) ─────────────────────────

        private static string TargetsKey(AppSettings s)
            => (s.RemoteManageEnabled ? "on;" : "off;")
               + string.Join(";", s.Targets.Select(t => $"{t.Id}|{t.Direction}|{t.AccessCode}|{t.Address}|{t.Mode}|{t.Port}|{t.ProtectedPassword}"));

        /// <summary>관리 대상 PC 목록이 바뀌면 접속을 새로 만듦</summary>
        private void ApplyRemoteManage()
        {
            var key = TargetsKey(_settings);
            if (key == _targetsKey) return;
            _targetsKey = key;

            // 기존 원격 PC 정리
            _passiveHub.Clear();
            foreach (var v in _viewers.Values.ToList()) v.Close();
            foreach (var g in _groups.Where(g => !g.IsLocal).ToList())
            {
                g.Client?.Dispose();
                _logWindows.Close($"remote|{g.Id}|", prefix: true);
                _groups.Remove(g);
            }

            if (_settings.RemoteManageEnabled)
            {
                foreach (var t in _settings.Targets)
                {
                    var client = new RemoteClient(t);
                    var g = new HostGroup
                    {
                        Id = t.Id,
                        Client = client,
                        Title = t.Label,
                        StatusText = "연결 중…",
                        StatusBrush = Brushes2.Pending,
                        EmptyText = "연결 중…"
                    };
                    client.StateChanged += c =>
                    {
                        // 상태는 이벤트 시점 값으로 넘김 (UI에서 나중에 읽으면 연속 변경이 모두 같은 값으로 보임)
                        var st = c.State;
                        var stMsg = c.StateMessage;
                        Dispatcher.BeginInvoke(new Action(() => OnRemoteState(g, st, stMsg)));
                    };
                    client.ServicesChanged += c => Dispatcher.BeginInvoke(new Action(() => OnRemoteServices(g, c)));
                    client.HostnameDiscovered += (c, host) => Dispatcher.BeginInvoke(new Action(() => OnHostname(g, c, host)));
                    client.PeerAddressDiscovered += (c, addr) => Dispatcher.BeginInvoke(new Action(() => OnPeerAddress(g, addr)));
                    if (t.Direction == ConnectDirection.Passive) _passiveHub.Register(client);
                    _groups.Add(g);
                    client.Start();
                }
            }

            // 열어둔 PC 탭: 없어진 PC는 닫고, 남은 PC는 새 목록으로 다시 엶
            var open = _hostTabs.Keys.ToList();
            foreach (var id in open) CloseHostTab(id, save: false);
            foreach (var id in open) OpenHostTab(id, select: false);
            SaveOpenTabs();

            _logWindows.ChoicesChanged();
            UpdateCounts();
        }

        /// <summary>Passive 대상이 있으면 수신 포트를 엶 (방화벽 포함)</summary>
        private void ApplyPassiveListen(bool startup)
        {
            var s = _settings;
            bool need = s.RemoteManageEnabled && s.Targets.Any(t => t.Direction == ConnectDirection.Passive);
            var key = need ? $"{s.PassiveListenMode}|{s.PassiveListenPort}" : "off";
            if (key == _passiveListenKey) return;
            bool wasOn = _passiveListenKey != "" && _passiveListenKey != "off";
            _passiveListenKey = key;
            _passiveHub.Apply(need, s.PassiveListenMode, s.PassiveListenPort);
            if (need || wasOn)
            {
                bool on = need && _passiveHub.IsRunning;
                int port = s.PassiveListenPort;
                Task.Run(() =>
                {
                    var (ok, msg) = FirewallManager.Apply(FirewallManager.PassiveRule, on, port);
                    if (!startup || !ok) Log(msg, ok ? LogLevel.Info : LogLevel.Warning);
                });
            }
        }

        /// <summary>Passive: 대상 PC가 접속해 온 IP 표시</summary>
        private void OnPeerAddress(HostGroup g, string addr)
        {
            var t = _settings.Targets.FirstOrDefault(x => x.Id == g.Id);
            if (t == null || string.IsNullOrEmpty(addr)) return;
            if (t.LastAddress != addr)
            {
                t.LastAddress = addr;
                SaveSettings();
            }
            g.Title = t.Label;
            g.TitleChanged();
            _logWindows.ChoicesChanged();
        }

        private void OnRemoteState(HostGroup g, RemoteState state, string stateMessage)
        {
            if (!_groups.Contains(g)) return;
            switch (state)
            {
                case RemoteState.Connected:
                    g.StatusText = "연결됨";
                    g.StatusBrush = Brushes2.Running;
                    g.EmptyText = "대상 PC에 등록된 서비스가 없습니다.";
                    Log($"[{g.Prefix}] 연결됨", LogLevel.Success);
                    break;
                case RemoteState.Connecting:
                    g.StatusText = "연결 중…";
                    g.StatusBrush = Brushes2.Pending;
                    break;
                default:
                    bool wasConnected = g.Rows.Any(r => r.StatusKnown);
                    g.StatusText = (state == RemoteState.AuthFailed ? "인증 실패: " : "연결 안 됨: ") + stateMessage;
                    g.StatusBrush = Brushes2.Stopped;
                    g.EmptyText = g.StatusText;
                    foreach (var r in g.Rows) r.MarkUnknown();
                    // 같은 실패 메시지는 처음 한 번만 기록
                    if (wasConnected || g.Tag != stateMessage)
                        Log($"[{g.Prefix}] {g.StatusText}", state == RemoteState.AuthFailed ? LogLevel.Error : LogLevel.Warning);
                    g.Tag = stateMessage;
                    break;
            }
            if (state == RemoteState.Connected) g.Tag = null;
            UpdateCounts();
        }

        private void OnRemoteServices(HostGroup g, RemoteClient c)
        {
            if (!_groups.Contains(g)) return;
            var list = c.Services;
            var names = new HashSet<string>(list.Select(s => s.ServiceName), StringComparer.OrdinalIgnoreCase);
            bool changed = false;

            // 대상 PC에서 빠진 서비스
            foreach (var r in g.Rows.Where(r => !names.Contains(r.ServiceName)).ToList())
            {
                g.Rows.Remove(r);
                _logWindows.Close($"remote|{g.Id}|{r.ServiceName}");
                changed = true;
            }

            // 새로 생기거나 바뀐 서비스
            int index = 0;
            foreach (var info in list)
            {
                var row = g.Rows.FirstOrDefault(r => string.Equals(r.ServiceName, info.ServiceName, StringComparison.OrdinalIgnoreCase));
                if (row == null)
                {
                    row = new ServiceRow(new ServiceEntry { ServiceName = info.ServiceName, DisplayName = info.DisplayName }, g);
                    g.Rows.Insert(Math.Min(index, g.Rows.Count), row);
                    row.UpdateFromRemote(info);
                    changed = true;
                }
                else
                {
                    var before = row.StatusKnown ? row.Status : null;
                    bool known = row.StatusKnown;
                    bool hadLog = row.HasLog;
                    row.UpdateFromRemote(info);
                    if (known && before != row.Status && !row.IsBusy) LogStatusChange(row, before, row.Status);
                    if (hadLog != row.HasLog) changed = true;
                }
                index++;
            }

            if (changed) _logWindows.ChoicesChanged();
            UpdateCounts();
        }

        /// <summary>hostname 자동 등록</summary>
        private void OnHostname(HostGroup g, RemoteClient c, string host)
        {
            var t = _settings.Targets.FirstOrDefault(x => x.Id == g.Id);
            if (t == null) return;
            if (t.Hostname != host)
            {
                Log($"[{t.Address}] hostname 자동 등록: {host}");
                t.Hostname = host;
                SaveSettings();
            }
            g.Title = t.Label;
            g.TitleChanged();
            _logWindows.ChoicesChanged();
        }

        // ───────────────────────── 원격: 원격 접속 허용 (대상 역할) ─────────────────────────

        private void ApplyRemoteServer(bool startup)
        {
            var s = _settings;
            bool hasPw = !string.IsNullOrEmpty(s.RemotePasswordHash);
            // 비밀번호는 Active / Passive 모두 사용하므로 항상 반영
            _remoteServer.UpdatePassword(s.RemotePasswordHash, s.RemotePasswordSalt);

            if (s.RemoteServerEnabled && !hasPw)
                Log("원격 접속 허용: 접속 비밀번호가 없어 시작하지 않았습니다. (설정 → 원격 접속 허용)", LogLevel.Warning);

            // ── Active 수신
            bool active = s.RemoteServerEnabled && hasPw && s.RemoteServerActiveListen;
            var key = active ? $"{s.RemoteServerMode}|{s.RemoteServerPort}" : "off";
            if (key != _serverKey)
            {
                bool wasOn = _serverKey != "" && _serverKey != "off";
                _serverKey = key;
                if (active) _remoteServer.Start(s.RemoteServerMode, s.RemoteServerPort, s.RemotePasswordHash, s.RemotePasswordSalt);
                else _remoteServer.Stop();

                // 방화벽: 켤 때 포트 열기, 끌 때 규칙 삭제 (처음 실행 시 꺼져 있으면 건드리지 않음)
                if (active || wasOn || !startup)
                {
                    bool on = active && _remoteServer.IsRunning;
                    int port = s.RemoteServerPort;
                    Task.Run(() =>
                    {
                        var (ok, msg) = FirewallManager.Apply(FirewallManager.ActiveRule, on, port);
                        if (!startup || !ok) Log(msg, ok ? LogLevel.Info : LogLevel.Warning);
                    });
                }
            }

            // ── Passive 접속 (이 PC → 관리 PC)
            bool passive = s.RemoteServerEnabled && hasPw && s.PassiveManagers.Count > 0;
            var pkey = passive ? string.Join(";", s.PassiveManagers.Select(m => $"{m.Address}|{m.Mode}|{m.Port}|{m.AccessCode}")) : "off";
            if (pkey != _passiveKey)
            {
                _passiveKey = pkey;
                if (passive)
                {
                    _remoteServer.StartPassive(s.PassiveManagers);
                    Log($"Passive 접속 시작: 관리 PC {s.PassiveManagers.Count}곳", LogLevel.Info);
                }
                else _remoteServer.StopPassive();
            }

            // ── 원격관리 허용을 끄면 보고 있던 연결은 다음 장면에서 자동으로 끊김
            var parts = new List<string>();
            if (_remoteServer.IsRunning) parts.Add($"Active {(s.RemoteServerMode == RemoteMode.Ssh ? "SSH" : "지정 포트")} {s.RemoteServerPort}");
            if (passive) parts.Add($"Passive {s.PassiveManagers.Count}곳");
            if (s.RemoteServerEnabled && s.RemoteAllowView) parts.Add(s.RemoteAllowControl ? "화면 보기·제어 허용" : "화면 보기 허용");
            _local.StatusText = parts.Count > 0 ? "원격 접속 허용 중 · " + string.Join(" · ", parts) : "";
            _local.StatusBrush = Brushes2.Running;
        }

        // ───────────────────────── Windows 종료 ─────────────────────────

        private void Shutdown(bool restart)
        {
            var what = restart ? "재시작" : "강제 종료";
            if (_modalOpen) return;
            bool confirmed;
            _modalOpen = true;
            try
            {
                confirmed = CodeConfirmWindow.Ask(this, "Windows " + what,
                    $"Windows를 지금 {what}합니다.\n저장하지 않은 작업은 모두 사라집니다.",
                    restart ? "Windows 재시작" : "Windows 강제종료");
            }
            finally { _modalOpen = false; }
            if (!confirmed)
            {
                Log($"Windows {what} 취소");
                return;
            }
            Log($"Windows {what} 실행", LogLevel.Warning);
            try
            {
                if (restart) PowerOps.ForceRestart(); else PowerOps.ForceShutdown();
            }
            catch (Exception ex)
            {
                Log($"Windows {what} 실패: {ex.Message}", LogLevel.Error);
            }
        }

        // ───────────────────────── 설정 ─────────────────────────

        private void OpenSettings()
        {
            ShowFromTray();
            if (_modalOpen) return;
            bool wasStartup = _settings.RunAtStartup;
            var dlg = new SettingsWindow(_settings) { Owner = this };

            // 설정 창에서 단축키를 누를 때 전역 단축키가 먼저 받지 않도록 잠시 해제
            _hotkey.Unregister();
            bool? dialogOk;
            _modalOpen = true;
            try { dialogOk = dlg.ShowDialog(); }
            finally { _modalOpen = false; }
            if (dialogOk != true)
            {
                ApplyHotkey(quiet: true);
                return;
            }

            SaveSettings();
            Log("설정 저장");

            if (wasStartup != _settings.RunAtStartup || (_settings.RunAtStartup && !StartupManager.IsEnabled()))
            {
                var (ok, msg) = _settings.RunAtStartup ? StartupManager.Enable() : StartupManager.Disable();
                if (ok) Log(_settings.RunAtStartup ? "컴퓨터 시작시 기동: 켬 (작업 스케줄러 등록)" : "컴퓨터 시작시 기동: 끔", LogLevel.Success);
                else Log("컴퓨터 시작시 기동 설정 실패: " + msg, LogLevel.Error);
            }
            ApplySettings(startup: false);
        }

        private void ApplySettings(bool startup)
        {
            // Windows 종료 버튼 표시
            _pnlShutdown.Visibility = _settings.ShowShutdownButtons ? Visibility.Visible : Visibility.Collapsed;

            // 작업 로그 표시
            _ccLog.Visibility = _settings.ShowOperationLog ? Visibility.Visible : Visibility.Collapsed;
            _txtLogHidden.Visibility = _settings.ShowOperationLog ? Visibility.Collapsed : Visibility.Visible;

            ApplyHotkey(quiet: startup);
            ApplyRemoteServer(startup);
            ApplyRemoteManage();
            ApplyPassiveListen(startup);
        }

        private void ApplyHotkey(bool quiet)
        {
            var mods = (ModifierKeys)_settings.HotkeyModifiers;
            var key = (Key)_settings.HotkeyKey;
            if (_settings.HotkeyEnabled)
            {
                if (_hotkey.Register(mods, key))
                {
                    if (!quiet) Log($"단축키 등록: {HotkeyManager.Format(mods, key)}");
                }
                else
                {
                    var prev = _hotkey.Active;
                    Log($"단축키 {HotkeyManager.Format(mods, key)} 등록 실패 (다른 프로그램이 사용 중일 수 있습니다)"
                        + (prev.HasValue ? $" → 이전 단축키 {HotkeyManager.Format(prev.Value.mods, prev.Value.key)} 유지" : ""),
                        LogLevel.Warning);
                }
            }
            else
            {
                _hotkey.Unregister();
            }

            if (_tray != null)
                _tray.Text = Trim63(_settings.HotkeyEnabled
                    ? $"JJServiceManager{AppInstance.TitleTag} ({HotkeyManager.Format(mods, key)})"
                    : "JJServiceManager" + AppInstance.TitleTag);
        }

        private static string Trim63(string s) => s.Length > 63 ? s.Substring(0, 63) : s;

        private void SaveSettings()
        {
            if (WindowState == WindowState.Normal && IsLoaded)
            {
                _settings.WindowLeft = Left;
                _settings.WindowTop = Top;
                _settings.WindowWidth = Width;
                _settings.WindowHeight = Height;
            }
            SettingsStore.Save(_settings);
        }

        private void RestoreWindowBounds(AppSettings s)
        {
            Width = s.WindowWidth > 300 ? s.WindowWidth : 1000;
            Height = s.WindowHeight > 300 ? s.WindowHeight : 720;
            bool valid = !double.IsNaN(s.WindowLeft) && !double.IsNaN(s.WindowTop)
                && s.WindowLeft >= SystemParameters.VirtualScreenLeft - 50
                && s.WindowTop >= SystemParameters.VirtualScreenTop - 50
                && s.WindowLeft < SystemParameters.VirtualScreenLeft + SystemParameters.VirtualScreenWidth - 100
                && s.WindowTop < SystemParameters.VirtualScreenTop + SystemParameters.VirtualScreenHeight - 100;
            if (valid)
            {
                WindowStartupLocation = WindowStartupLocation.Manual;
                Left = s.WindowLeft;
                Top = s.WindowTop;
            }
            else
            {
                WindowStartupLocation = WindowStartupLocation.CenterScreen;
            }
        }

        // ───────────────────────── 트레이 / Esc / 종료 ─────────────────────────

        private void CreateTray()
        {
            var menu = new Forms.ContextMenuStrip();
            menu.Items.Add("열기", null, (s, e) => Dispatcher.Invoke(ShowFromTray));
            menu.Items.Add("설정", null, (s, e) => { if (!_modalOpen) Dispatcher.Invoke(OpenSettings); else Dispatcher.Invoke(ShowFromTray); });
            menu.Items.Add(new Forms.ToolStripSeparator());
            menu.Items.Add("완전 종료", null, (s, e) => Dispatcher.Invoke(ExitApp));

            _tray = new Forms.NotifyIcon
            {
                Icon = AppIcon.Icon,
                Text = Trim63("JJServiceManager" + AppInstance.TitleTag),
                ContextMenuStrip = menu,
                Visible = true
            };
            _tray.MouseClick += (s, e) =>
            {
                if (e.Button == Forms.MouseButtons.Left) Dispatcher.Invoke(ShowFromTray);
            };
        }

        public void ShowFromTray()
        {
            if (!IsVisible) Show();
            if (WindowState == WindowState.Minimized) WindowState = WindowState.Normal;
            Activate();
            Topmost = true;  // 다른 창 뒤에 숨지 않도록 잠깐 맨 앞으로
            Topmost = false;
            Focus();
        }

        private void HideToTray()
        {
            SaveSettings();
            Hide();
            if (!_trayTipShown && _tray != null)
            {
                _trayTipShown = true;
                var hk = _settings.HotkeyEnabled ? $" 단축키 {HotkeyManager.Format((ModifierKeys)_settings.HotkeyModifiers, (Key)_settings.HotkeyKey)}로 다시 열 수 있습니다." : "";
                _tray.ShowBalloonTip(2500, "JJServiceManager" + AppInstance.TitleTag, "트레이에서 계속 실행 중입니다." + hk, Forms.ToolTipIcon.Info);
            }
        }

        private void ToggleVisibility()
        {
            if (IsVisible && IsActive && WindowState != WindowState.Minimized) HideToTray();
            else ShowFromTray();
        }

        private void OnPreviewKeyDown(object sender, KeyEventArgs e)
        {
            if (e.Key != Key.Escape) return;
            e.Handled = true;
            if (_settings.EscAction == EscAction.Exit) ExitApp();
            else HideToTray();
        }

        protected override void OnClosing(CancelEventArgs e)
        {
            if (!_exiting)
            {
                // 창의 X 버튼도 Esc 설정을 따름
                if (_settings.EscAction == EscAction.Tray)
                {
                    e.Cancel = true;
                    HideToTray();
                    return;
                }
                _exiting = true;
                Cleanup();
            }
            base.OnClosing(e);
        }

        protected override void OnClosed(EventArgs e)
        {
            base.OnClosed(e);
            Application.Current.Shutdown();
        }

        /// <summary>Windows 로그오프/종료 시 정리</summary>
        public void OnSessionEnding()
        {
            if (_exiting) return;
            _exiting = true;
            OperationLogFile.Append(DateTime.Now, "Windows 세션 종료");
            Cleanup();
        }

        public void ExitApp()
        {
            if (_exiting) return;
            _exiting = true;
            Cleanup();
            Close();
            Application.Current.Shutdown();
        }

        private void Cleanup()
        {
            OperationLogFile.Append(DateTime.Now, "프로그램 종료");
            _statusTimer.Stop();
            SaveSettings();
            _logWindows.CloseAll();
            foreach (var v in _viewers.Values.ToList()) v.Close();
            foreach (var g in _groups) g.Client?.Dispose();
            _passiveHub.Dispose();
            _remoteServer.Dispose();
            _indicator?.Close();
            _hotkey?.Dispose();
            if (_tray != null)
            {
                _tray.Visible = false;
                _tray.Dispose();
                _tray = null;
            }
        }

        private static bool IsAdmin()
        {
            try { return new WindowsPrincipal(WindowsIdentity.GetCurrent()).IsInRole(WindowsBuiltInRole.Administrator); }
            catch { return false; }
        }
    }
}