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.Input;
using System.Windows.Interop;
using System.Windows.Media;
using System.Windows.Threading;
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 ObservableCollection<ServiceRow> _rows = new ObservableCollection<ServiceRow>();
        private readonly LogPanel _log;
        private readonly LogWindowManager _logWindows;
        private readonly DispatcherTimer _statusTimer;

        private readonly ItemsControl _list;
        private readonly CheckBox _chkAll;
        private readonly TextBlock _txtCount, _txtEmpty, _txtLogHidden;
        private readonly ContentControl _ccLog;
        private readonly FrameworkElement _pnlShutdown;

        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";
            FontFamily = new FontFamily("Malgun Gothic");
            FontSize = 13;
            Background = Brushes2.Make("#F5F7F8");
            MinWidth = 760;
            MinHeight = 520;
            AppIcon.Apply(this);
            RestoreWindowBounds(settings);

            var root = XamlLoader.LoadElement("MainWindow.xaml");
            Content = root;

            _list = root.Find<ItemsControl>("icServices");
            _chkAll = root.Find<CheckBox>("chkAll");
            _txtCount = root.Find<TextBlock>("txtCount");
            _txtEmpty = root.Find<TextBlock>("txtEmpty");
            _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);

            foreach (var e in settings.Services) _rows.Add(new ServiceRow(e));
            _list.ItemsSource = _rows;
            _rows.CollectionChanged += (s, e) => 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 _rows) r.IsChecked = v;
            };

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

            PreviewKeyDown += OnPreviewKeyDown;

            // 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;

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

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

            _ = 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);
        }

        // ───────────────────────── 서비스 목록 ─────────────────────────

        private void UpdateCounts()
        {
            int running = _rows.Count(r => r.Status == ServiceControllerStatus.Running);
            _txtCount.Text = _rows.Count == 0 ? "" : $"{_rows.Count}개 · 실행 중 {running}";
            _txtEmpty.Visibility = _rows.Count == 0 ? Visibility.Visible : Visibility.Collapsed;
        }

        private void SyncEntriesFromRows()
        {
            _settings.Services = _rows.Select(r => r.Entry).ToList();
            SaveSettings();
            _logWindows.ServicesChanged();
        }

        private void AddServices()
        {
            if (_modalOpen) return;
            var picker = new ServicePickerWindow(_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 = _rows.Where(r => !chosenNames.Contains(r.ServiceName)).ToList();
            foreach (var r in removed)
            {
                _rows.Remove(r);
                _logWindows.Close(r.ServiceName);
            }

            // 새로 체크된 항목 추가 (기존 순서 유지, 새 항목은 뒤에)
            var existing = new HashSet<string>(_rows.Select(r => r.ServiceName), StringComparer.OrdinalIgnoreCase);
            var added = new List<string>();
            foreach (var c in chosen)
            {
                if (existing.Contains(c.ServiceName)) continue;
                var row = new ServiceRow(new ServiceEntry { ServiceName = c.ServiceName, DisplayName = c.DisplayName });
                _rows.Add(row);
                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 targets = _rows.Where(r => r.IsChecked).ToList();
            if (targets.Count == 0)
            {
                Dialogs.Info(this, "삭제할 서비스를 체크하세요.");
                return;
            }
            var names = string.Join("\n", targets.Select(t => " · " + t.DisplayName));
            if (!Dialogs.Confirm(this, $"아래 {targets.Count}개 서비스를 목록에서 삭제할까요?\n\n{names}\n\n(Windows 서비스 자체는 그대로 유지됩니다)", "삭제"))
                return;

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

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

        private async void OnRowButton(object sender, RoutedEventArgs e)
        {
            if (e.OriginalSource is not Button b || b.DataContext is not ServiceRow row) return;
            switch (b.Tag as string)
            {
                case "start": await StartService(row); break;
                case "stop": await StopService(row); break;
                case "status": await ShowStatus(row); break;
                case "log": OpenLog(row, b); break;
            }
        }

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

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

        private async Task RunChecked(bool start)
        {
            var targets = _rows.Where(r => r.IsChecked).ToList();
            if (targets.Count == 0)
            {
                Dialogs.Info(this, $"{(start ? "시작" : "중지")}할 서비스를 체크하세요.");
                return;
            }
            Log($"선택한 {targets.Count}개 서비스 {(start ? "시작" : "중지")}", 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 = await Task.Run(() => ServiceOps.GetDetails(row.ServiceName));
                Log($"[{row.DisplayName}] 상태 정보", LogLevel.Notice);
                foreach (var l in lines) Log("    " + l);
            }
            catch (Exception ex)
            {
                Log($"[{row.DisplayName}] 상태 조회 실패: {ServiceOps.Describe(ex)}", LogLevel.Error);
            }
            await RefreshStatuses(true);
        }

        private void OpenLog(ServiceRow row, FrameworkElement anchor)
        {
            if (string.IsNullOrWhiteSpace(row.Entry.LogPath))
            {
                // 경로가 없으면 파일/폴더 중 선택
                ShowLogMenu(row, anchor, includeView: false);
                return;
            }
            _logWindows.Open(row.Entry);
        }

        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)
            {
                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 && !string.IsNullOrWhiteSpace(row.Entry.LogPath))
            {
                var view = new MenuItem { Header = "로그 보기", FontWeight = FontWeights.Bold };
                view.Click += (s, e) => _logWindows.Open(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 (!string.IsNullOrWhiteSpace(row.Entry.LogPath))
            {
                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.DisplayName}] 로그 경로 해제");
                    SyncEntriesFromRows();
                    _logWindows.EntryPathChanged(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 (!string.IsNullOrWhiteSpace(row.Entry.LogPath))
            {
                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.DisplayName}] 로그 파일 지정: {dlg.FileName}");
            SyncEntriesFromRows();
            _logWindows.EntryPathChanged(row.Entry);
            _logWindows.Open(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 (!string.IsNullOrWhiteSpace(row.Entry.LogPath))
            {
                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.DisplayName}] 로그 폴더 지정: {dlg.FolderName}");
            SyncEntriesFromRows();
            _logWindows.EntryPathChanged(row.Entry);
            _logWindows.Open(row.Entry);
        }

        // ───────────────────────── 상태 자동 갱신 ─────────────────────────

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

                foreach (var r in _rows)
                {
                    if (!result.TryGetValue(r.ServiceName, out var st)) continue;
                    if (r.StatusKnown && r.Status != st && !r.IsBusy)
                    {
                        Log($"[{r.DisplayName}] 상태 변경: {ServiceOps.StatusText(r.Status)} → {ServiceOps.StatusText(st)}",
                            st == ServiceControllerStatus.Running ? LogLevel.Success
                            : st == ServiceControllerStatus.Stopped ? LogLevel.Warning : LogLevel.Info);
                    }
                    r.Status = st;
                }
                UpdateCounts();
            }
            catch
            {
                // 다음 주기에 다시 시도
            }
            finally
            {
                _refreshing = false;
            }
        }

        // ───────────────────────── 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);
        }

        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 = _settings.HotkeyEnabled
                    ? Trim63($"JJServiceManager ({HotkeyManager.Format(mods, key)})")
                    : "JJServiceManager";
        }

        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 = "JJServiceManager",
                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", "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();
            _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; }
        }
    }
}