import 'dart:convert';
import 'dart:io';

import 'package:file_picker/file_picker.dart';
import 'package:flutter/material.dart';
import 'package:flutter/services.dart';
import 'package:flutter_hbb/common.dart';
import 'package:flutter_hbb/common/widgets/setting_widgets.dart';
import 'package:flutter_hbb/consts.dart';
import 'package:flutter_hbb/desktop/pages/desktop_home_page.dart';
import 'package:flutter_hbb/desktop/pages/desktop_tab_page.dart';
import 'package:flutter_hbb/models/platform_model.dart';
import 'package:flutter_hbb/models/server_model.dart';
import 'package:flutter_hbb/plugin/manager.dart';
import 'package:flutter_hbb/plugin/widgets/desktop_settings.dart';
import 'package:get/get.dart';
import 'package:provider/provider.dart';
import 'package:url_launcher/url_launcher.dart';
import 'package:url_launcher/url_launcher_string.dart';
import 'package:flutter_hbb/desktop/widgets/scroll_wrapper.dart';

import '../../common/widgets/dialog.dart';
import '../../common/widgets/login.dart';

const double _kTabWidth = 200;
const double _kTabHeight = 42;
const double _kCardFixedWidth = 540;
const double _kCardLeftMargin = 15;
const double _kContentHMargin = 15;
const double _kContentHSubMargin = _kContentHMargin + 33;
const double _kCheckBoxLeftMargin = 10;
const double _kRadioLeftMargin = 10;
const double _kListViewBottomMargin = 15;
const double _kTitleFontSize = 20;
const double _kContentFontSize = 15;
const Color _accentColor = MyTheme.accent;
const String _kSettingPageControllerTag = 'settingPageController';
const String _kSettingPageIndexTag = 'settingPageIndex';
const int _kPageCount = 6;

class _TabInfo {
  late final String label;
  late final IconData unselected;
  late final IconData selected;
  _TabInfo(this.label, this.unselected, this.selected);
}

class DesktopSettingPage extends StatefulWidget {
  final int initialPage;

  const DesktopSettingPage({Key? key, required this.initialPage})
      : super(key: key);

  @override
  State<DesktopSettingPage> createState() => _DesktopSettingPageState();

  static void switch2page(int page) {
    if (page >= _kPageCount) return;
    try {
      if (Get.isRegistered<PageController>(tag: _kSettingPageControllerTag)) {
        DesktopTabPage.onAddSetting(initialPage: page);
        PageController controller = Get.find(tag: _kSettingPageControllerTag);
        RxInt selectedIndex = Get.find(tag: _kSettingPageIndexTag);
        selectedIndex.value = page;
        controller.jumpToPage(page);
      } else {
        DesktopTabPage.onAddSetting(initialPage: page);
      }
    } catch (e) {
      debugPrintStack(label: '$e');
    }
  }
}

class _DesktopSettingPageState extends State<DesktopSettingPage>
    with TickerProviderStateMixin, AutomaticKeepAliveClientMixin {
  late PageController controller;
  late RxInt selectedIndex;

  @override
  bool get wantKeepAlive => true;

  @override
  void initState() {
    super.initState();
    selectedIndex =
        (widget.initialPage < _kPageCount ? widget.initialPage : 0).obs;
    Get.put<RxInt>(selectedIndex, tag: _kSettingPageIndexTag);
    controller = PageController(initialPage: widget.initialPage);
    Get.put<PageController>(controller, tag: _kSettingPageControllerTag);
  }

  @override
  void dispose() {
    super.dispose();
    Get.delete<PageController>(tag: _kSettingPageControllerTag);
    Get.delete<RxInt>(tag: _kSettingPageIndexTag);
  }

  List<_TabInfo> _settingTabs() {
    final List<_TabInfo> settingTabs = <_TabInfo>[
      _TabInfo('General', Icons.settings_outlined, Icons.settings),
      _TabInfo('Security', Icons.enhanced_encryption_outlined,
          Icons.enhanced_encryption),
      _TabInfo('Network', Icons.link_outlined, Icons.link),
      _TabInfo(
          'Display', Icons.desktop_windows_outlined, Icons.desktop_windows),
      _TabInfo('Account', Icons.person_outline, Icons.person),
      _TabInfo('About', Icons.info_outline, Icons.info)
    ];
    if (bind.pluginFeatureIsEnabled()) {
      settingTabs.insert(
          4, _TabInfo('Plugin', Icons.extension_outlined, Icons.extension));
    }
    return settingTabs;
  }

  List<Widget> _children() {
    final children = [
      _General(),
      _Safety(),
      _Network(),
      _Display(),
      _Account(),
      _About(),
    ];
    if (bind.pluginFeatureIsEnabled()) {
      children.insert(4, _Plugin());
    }
    return children;
  }

  @override
  Widget build(BuildContext context) {
    super.build(context);
    return Scaffold(
      backgroundColor: Theme.of(context).colorScheme.background,
      body: Row(
        children: <Widget>[
          SizedBox(
            width: _kTabWidth,
            child: Column(
              children: [
                _header(),
                Flexible(child: _listView(tabs: _settingTabs())),
              ],
            ),
          ),
          const VerticalDivider(width: 1),
          Expanded(
            child: Container(
              color: Theme.of(context).scaffoldBackgroundColor,
              child: DesktopScrollWrapper(
                  scrollController: controller,
                  child: PageView(
                    controller: controller,
                    physics: DraggableNeverScrollableScrollPhysics(),
                    children: _children(),
                  )),
            ),
          )
        ],
      ),
    );
  }

  Widget _header() {
    return Row(
      children: [
        SizedBox(
          height: 62,
          child: Text(
            translate('Settings'),
            textAlign: TextAlign.left,
            style: const TextStyle(
              color: _accentColor,
              fontSize: _kTitleFontSize,
              fontWeight: FontWeight.w400,
            ),
          ),
        ).marginOnly(left: 20, top: 10),
        const Spacer(),
      ],
    );
  }

  Widget _listView({required List<_TabInfo> tabs}) {
    final scrollController = ScrollController();
    return DesktopScrollWrapper(
        scrollController: scrollController,
        child: ListView(
          physics: DraggableNeverScrollableScrollPhysics(),
          controller: scrollController,
          children: tabs
              .asMap()
              .entries
              .map((tab) => _listItem(tab: tab.value, index: tab.key))
              .toList(),
        ));
  }

  Widget _listItem({required _TabInfo tab, required int index}) {
    return Obx(() {
      bool selected = index == selectedIndex.value;
      return SizedBox(
        width: _kTabWidth,
        height: _kTabHeight,
        child: InkWell(
          onTap: () {
            if (selectedIndex.value != index) {
              controller.jumpToPage(index);
            }
            selectedIndex.value = index;
          },
          child: Row(children: [
            Container(
              width: 4,
              height: _kTabHeight * 0.7,
              color: selected ? _accentColor : null,
            ),
            Icon(
              selected ? tab.selected : tab.unselected,
              color: selected ? _accentColor : null,
              size: 20,
            ).marginOnly(left: 13, right: 10),
            Text(
              translate(tab.label),
              style: TextStyle(
                  color: selected ? _accentColor : null,
                  fontWeight: FontWeight.w400,
                  fontSize: _kContentFontSize),
            ),
          ]),
        ),
      );
    });
  }
}

//#region pages

class _General extends StatefulWidget {
  const _General({Key? key}) : super(key: key);

  @override
  State<_General> createState() => _GeneralState();
}

class _GeneralState extends State<_General> {
  final RxBool serviceStop = Get.find<RxBool>(tag: 'stop-service');
  RxBool serviceBtnEnabled = true.obs;

  @override
  Widget build(BuildContext context) {
    final scrollController = ScrollController();
    return DesktopScrollWrapper(
        scrollController: scrollController,
        child: ListView(
          physics: DraggableNeverScrollableScrollPhysics(),
          controller: scrollController,
          children: [
            service(),
            theme(),
            hwcodec(),
            audio(context),
            record(context),
            _Card(title: 'Language', children: [language()]),
            other()
          ],
        ).marginOnly(bottom: _kListViewBottomMargin));
  }

  Widget theme() {
    final current = MyTheme.getThemeModePreference().toShortString();
    onChanged(String value) {
      MyTheme.changeDarkMode(MyTheme.themeModeFromString(value));
      setState(() {});
    }

    return _Card(title: 'Theme', children: [
      _Radio<String>(context,
          value: 'light',
          groupValue: current,
          label: 'Light',
          onChanged: onChanged),
      _Radio<String>(context,
          value: 'dark',
          groupValue: current,
          label: 'Dark',
          onChanged: onChanged),
      _Radio<String>(context,
          value: 'system',
          groupValue: current,
          label: 'Follow System',
          onChanged: onChanged),
    ]);
  }

  Widget service() {
    return _Card(title: 'Service', children: [
      Obx(() => _Button(serviceStop.value ? 'Start' : 'Stop', () {
            () async {
              serviceBtnEnabled.value = false;
              await start_service(serviceStop.value);
              // enable the button after 1 second
              Future.delayed(const Duration(seconds: 1), () {
                serviceBtnEnabled.value = true;
              });
            }();
          }, enabled: serviceBtnEnabled.value))
    ]);
  }

  Widget other() {
    final children = [
      _OptionCheckBox(context, 'Confirm before closing multiple tabs',
          'enable-confirm-closing-tabs',
          isServer: false),
      _OptionCheckBox(context, 'Adaptive bitrate', 'enable-abr'),
      _OptionCheckBox(
        context,
        'Open connection in new tab',
        kOptionOpenNewConnInTabs,
        isServer: false,
      ),
    ];
    // though this is related to GUI, but opengl problem affects all users, so put in config rather than local
    children.add(Tooltip(
      message: translate('software_render_tip'),
      child: _OptionCheckBox(context, "Always use software rendering",
          'allow-always-software-render'),
    ));
    if (bind.mainShowOption(key: 'allow-linux-headless')) {
      children.add(_OptionCheckBox(
          context, 'Allow linux headless', 'allow-linux-headless'));
    }
    return _Card(title: 'Other', children: children);
  }

  Widget hwcodec() {
    return Offstage(
      offstage: !bind.mainHasHwcodec(),
      child: _Card(title: 'Hardware Codec', children: [
        _OptionCheckBox(context, 'Enable hardware codec', 'enable-hwcodec'),
      ]),
    );
  }

  Widget audio(BuildContext context) {
    String getDefault() {
      if (Platform.isWindows) return translate('System Sound');
      return '';
    }

    Future<String> getValue() async {
      String device = await bind.mainGetOption(key: 'audio-input');
      if (device.isNotEmpty) {
        return device;
      } else {
        return getDefault();
      }
    }

    setDevice(String device) {
      if (device == getDefault()) device = '';
      bind.mainSetOption(key: 'audio-input', value: device);
    }

    return futureBuilder(future: () async {
      List<String> devices = (await bind.mainGetSoundInputs()).toList();
      if (Platform.isWindows) {
        devices.insert(0, translate('System Sound'));
      }
      String current = await getValue();
      return {'devices': devices, 'current': current};
    }(), hasData: (data) {
      String currentDevice = data['current'];
      List<String> devices = data['devices'] as List<String>;
      if (devices.isEmpty) {
        return const Offstage();
      }
      return _Card(title: 'Audio Input Device', children: [
        ...devices.map((device) => _Radio<String>(context,
                value: device,
                groupValue: currentDevice,
                autoNewLine: false,
                label: device, onChanged: (value) {
              setDevice(value);
              setState(() {});
            }))
      ]);
    });
  }

  Widget record(BuildContext context) {
    return futureBuilder(future: () async {
      String defaultDirectory = await bind.mainDefaultVideoSaveDirectory();
      // canLaunchUrl blocked on windows portable, user SYSTEM
      return {'dir': defaultDirectory, 'canlaunch': true};
    }(), hasData: (data) {
      Map<String, dynamic> map = data as Map<String, dynamic>;
      String dir = map['dir']!;
      String customDirectory =
          bind.mainGetOptionSync(key: 'video-save-directory');
      if (customDirectory.isNotEmpty) {
        dir = customDirectory;
      }
      bool canlaunch = map['canlaunch']! as bool;

      return _Card(title: 'Recording', children: [
        _OptionCheckBox(context, 'Automatically record incoming sessions',
            'allow-auto-record-incoming'),
        Row(
          children: [
            Text('${translate("Directory")}:'),
            Expanded(
              child: GestureDetector(
                  onTap: canlaunch ? () => launchUrl(Uri.file(dir)) : null,
                  child: Text(
                    dir,
                    softWrap: true,
                    style:
                        const TextStyle(decoration: TextDecoration.underline),
                  )).marginOnly(left: 10),
            ),
            ElevatedButton(
                    onPressed: () async {
                      String? initialDirectory;
                      if (await Directory.fromUri(Uri.directory(dir))
                          .exists()) {
                        initialDirectory = dir;
                      }
                      String? selectedDirectory = await FilePicker.platform
                          .getDirectoryPath(initialDirectory: initialDirectory);
                      if (selectedDirectory != null) {
                        await bind.mainSetOption(
                            key: 'video-save-directory',
                            value: selectedDirectory);
                        setState(() {});
                      }
                    },
                    child: Text(translate('Change')))
                .marginOnly(left: 5),
          ],
        ).marginOnly(left: _kContentHMargin),
      ]);
    });
  }

  Widget language() {
    return futureBuilder(future: () async {
      String langs = await bind.mainGetLangs();
      return {'langs': langs};
    }(), hasData: (res) {
      Map<String, String> data = res as Map<String, String>;
      List<dynamic> langsList = jsonDecode(data['langs']!);
      Map<String, String> langsMap = {for (var v in langsList) v[0]: v[1]};
      List<String> keys = langsMap.keys.toList();
      List<String> values = langsMap.values.toList();
      keys.insert(0, '');
      values.insert(0, translate('Default'));
      String currentKey = bind.mainGetLocalOption(key: kCommConfKeyLang);
      if (!keys.contains(currentKey)) {
        currentKey = '';
      }
      return _ComboBox(
        keys: keys,
        values: values,
        initialKey: currentKey,
        onChanged: (key) async {
          await bind.mainSetLocalOption(key: kCommConfKeyLang, value: key);
          reloadAllWindows();
          bind.mainChangeLanguage(lang: key);
        },
      ).marginOnly(left: _kContentHMargin);
    });
  }
}

enum _AccessMode {
  custom,
  full,
  view,
}

class _Safety extends StatefulWidget {
  const _Safety({Key? key}) : super(key: key);

  @override
  State<_Safety> createState() => _SafetyState();
}

class _SafetyState extends State<_Safety> with AutomaticKeepAliveClientMixin {
  @override
  bool get wantKeepAlive => true;
  bool locked = bind.mainIsInstalled();
  final scrollController = ScrollController();

  @override
  Widget build(BuildContext context) {
    super.build(context);
    return DesktopScrollWrapper(
        scrollController: scrollController,
        child: SingleChildScrollView(
            physics: DraggableNeverScrollableScrollPhysics(),
            controller: scrollController,
            child: Column(
              children: [
                _lock(locked, 'Unlock Security Settings', () {
                  locked = false;
                  setState(() => {});
                }),
                AbsorbPointer(
                  absorbing: locked,
                  child: Column(children: [
                    permissions(context),
                    password(context),
                    _Card(title: 'ID', children: [changeId()]),
                    more(context),
                  ]),
                ),
              ],
            )).marginOnly(bottom: _kListViewBottomMargin));
  }

  Widget changeId() {
    return ChangeNotifierProvider.value(
        value: gFFI.serverModel,
        child: Consumer<ServerModel>(builder: ((context, model, child) {
          return _Button('Change ID', changeIdDialog,
              enabled: !locked && model.connectStatus > 0);
        })));
  }

  Widget permissions(context) {
    bool enabled = !locked;
    // Simple temp wrapper for PR check
    tmpWrapper() {
      String accessMode = bind.mainGetOptionSync(key: 'access-mode');
      _AccessMode mode;
      if (accessMode == 'full') {
        mode = _AccessMode.full;
      } else if (accessMode == 'view') {
        mode = _AccessMode.view;
      } else {
        mode = _AccessMode.custom;
      }
      String initialKey;
      bool? fakeValue;
      switch (mode) {
        case _AccessMode.custom:
          initialKey = '';
          fakeValue = null;
          break;
        case _AccessMode.full:
          initialKey = 'full';
          fakeValue = true;
          break;
        case _AccessMode.view:
          initialKey = 'view';
          fakeValue = false;
          break;
      }

      return _Card(title: 'Permissions', children: [
        _ComboBox(
            keys: [
              '',
              'full',
              'view',
            ],
            values: [
              translate('Custom'),
              translate('Full Access'),
              translate('Screen Share'),
            ],
            enabled: enabled,
            initialKey: initialKey,
            onChanged: (mode) async {
              await bind.mainSetOption(key: 'access-mode', value: mode);
              setState(() {});
            }).marginOnly(left: _kContentHMargin),
        Column(
          children: [
            _OptionCheckBox(context, 'Enable Keyboard/Mouse', 'enable-keyboard',
                enabled: enabled, fakeValue: fakeValue),
            _OptionCheckBox(context, 'Enable Clipboard', 'enable-clipboard',
                enabled: enabled, fakeValue: fakeValue),
            _OptionCheckBox(
                context, 'Enable File Transfer', 'enable-file-transfer',
                enabled: enabled, fakeValue: fakeValue),
            _OptionCheckBox(context, 'Enable Audio', 'enable-audio',
                enabled: enabled, fakeValue: fakeValue),
            _OptionCheckBox(context, 'Enable TCP Tunneling', 'enable-tunnel',
                enabled: enabled, fakeValue: fakeValue),
            _OptionCheckBox(
                context, 'Enable Remote Restart', 'enable-remote-restart',
                enabled: enabled, fakeValue: fakeValue),
            _OptionCheckBox(
                context, 'Enable Recording Session', 'enable-record-session',
                enabled: enabled, fakeValue: fakeValue),
            _OptionCheckBox(context, 'Enable remote configuration modification',
                'allow-remote-config-modification',
                enabled: enabled, fakeValue: fakeValue),
          ],
        ),
      ]);
    }

    return tmpWrapper();
  }

  Widget password(BuildContext context) {
    return ChangeNotifierProvider.value(
        value: gFFI.serverModel,
        child: Consumer<ServerModel>(builder: ((context, model, child) {
          List<String> passwordKeys = [
            kUseTemporaryPassword,
            kUsePermanentPassword,
            kUseBothPasswords,
          ];
          List<String> passwordValues = [
            translate('Use one-time password'),
            translate('Use permanent password'),
            translate('Use both passwords'),
          ];
          bool tmpEnabled = model.verificationMethod != kUsePermanentPassword;
          bool permEnabled = model.verificationMethod != kUseTemporaryPassword;
          String currentValue =
              passwordValues[passwordKeys.indexOf(model.verificationMethod)];
          List<Widget> radios = passwordValues
              .map((value) => _Radio<String>(
                    context,
                    value: value,
                    groupValue: currentValue,
                    label: value,
                    onChanged: ((value) {
                      () async {
                        await model.setVerificationMethod(
                            passwordKeys[passwordValues.indexOf(value)]);
                        await model.updatePasswordModel();
                      }();
                    }),
                    enabled: !locked,
                  ))
              .toList();

          var onChanged = tmpEnabled && !locked
              ? (value) {
                  if (value != null) {
                    () async {
                      await model.setTemporaryPasswordLength(value.toString());
                      await model.updatePasswordModel();
                    }();
                  }
                }
              : null;
          List<Widget> lengthRadios = ['6', '8', '10']
              .map((value) => GestureDetector(
                    child: Row(
                      children: [
                        Radio(
                            value: value,
                            groupValue: model.temporaryPasswordLength,
                            onChanged: onChanged),
                        Text(
                          value,
                          style: TextStyle(
                              color: _disabledTextColor(
                                  context, onChanged != null)),
                        ),
                      ],
                    ).paddingOnly(right: 10),
                    onTap: () => onChanged?.call(value),
                  ))
              .toList();

          final modeKeys = ['password', 'click', ''];
          final modeValues = [
            translate('Accept sessions via password'),
            translate('Accept sessions via click'),
            translate('Accept sessions via both'),
          ];
          var modeInitialKey = model.approveMode;
          if (!modeKeys.contains(modeInitialKey)) modeInitialKey = '';
          final usePassword = model.approveMode != 'click';

          return _Card(title: 'Password', children: [
            _ComboBox(
              enabled: !locked,
              keys: modeKeys,
              values: modeValues,
              initialKey: modeInitialKey,
              onChanged: (key) => model.setApproveMode(key),
            ).marginOnly(left: _kContentHMargin),
            if (usePassword) radios[0],
            if (usePassword)
              _SubLabeledWidget(
                  context,
                  'One-time password length',
                  Row(
                    children: [
                      ...lengthRadios,
                    ],
                  ),
                  enabled: tmpEnabled && !locked),
            if (usePassword) radios[1],
            if (usePassword)
              _SubButton('Set permanent password', setPasswordDialog,
                  permEnabled && !locked),
            // if (usePassword)
            //   hide_cm(!locked).marginOnly(left: _kContentHSubMargin - 6),
            if (usePassword) radios[2],
          ]);
        })));
  }

  Widget more(BuildContext context) {
    bool enabled = !locked;
    return _Card(title: 'Security', children: [
      Offstage(
        offstage: !Platform.isWindows,
        child: _OptionCheckBox(context, 'Enable RDP', 'enable-rdp',
            enabled: enabled),
      ),
      shareRdp(context, enabled),
      _OptionCheckBox(context, 'Deny LAN Discovery', 'enable-lan-discovery',
          reverse: true, enabled: enabled),
      ...directIp(context),
      whitelist(),
    ]);
  }

  shareRdp(BuildContext context, bool enabled) {
    onChanged(bool b) async {
      await bind.mainSetShareRdp(enable: b);
      setState(() {});
    }

    bool value = bind.mainIsShareRdp();
    return Offstage(
      offstage: !(Platform.isWindows && bind.mainIsRdpServiceOpen()),
      child: GestureDetector(
          child: Row(
            children: [
              Checkbox(
                      value: value,
                      onChanged: enabled ? (_) => onChanged(!value) : null)
                  .marginOnly(right: 5),
              Expanded(
                child: Text(translate('Enable RDP session sharing'),
                    style:
                        TextStyle(color: _disabledTextColor(context, enabled))),
              )
            ],
          ).marginOnly(left: _kCheckBoxLeftMargin),
          onTap: enabled ? () => onChanged(!value) : null),
    );
  }

  List<Widget> directIp(BuildContext context) {
    TextEditingController controller = TextEditingController();
    update() => setState(() {});
    RxBool applyEnabled = false.obs;
    return [
      _OptionCheckBox(context, 'Enable Direct IP Access', 'direct-server',
          update: update, enabled: !locked),
      () {
        // Simple temp wrapper for PR check
        tmpWrapper() {
          bool enabled = option2bool(
              'direct-server', bind.mainGetOptionSync(key: 'direct-server'));
          if (!enabled) applyEnabled.value = false;
          controller.text = bind.mainGetOptionSync(key: 'direct-access-port');
          return Offstage(
            offstage: !enabled,
            child: _SubLabeledWidget(
              context,
              'Port',
              Row(children: [
                SizedBox(
                  width: 95,
                  child: TextField(
                    controller: controller,
                    enabled: enabled && !locked,
                    onChanged: (_) => applyEnabled.value = true,
                    inputFormatters: [
                      FilteringTextInputFormatter.allow(RegExp(
                          r'^([0-9]|[1-9]\d|[1-9]\d{2}|[1-9]\d{3}|[1-5]\d{4}|6[0-4]\d{3}|65[0-4]\d{2}|655[0-2]\d|6553[0-5])$')),
                    ],
                    decoration: const InputDecoration(
                      hintText: '21118',
                      contentPadding:
                          EdgeInsets.symmetric(vertical: 12, horizontal: 12),
                    ),
                  ).marginOnly(right: 15),
                ),
                Obx(() => ElevatedButton(
                      onPressed: applyEnabled.value && enabled && !locked
                          ? () async {
                              applyEnabled.value = false;
                              await bind.mainSetOption(
                                  key: 'direct-access-port',
                                  value: controller.text);
                            }
                          : null,
                      child: Text(
                        translate('Apply'),
                      ),
                    ))
              ]),
              enabled: enabled && !locked,
            ),
          );
        }

        return tmpWrapper();
      }(),
    ];
  }

  Widget whitelist() {
    bool enabled = !locked;
    // Simple temp wrapper for PR check
    tmpWrapper() {
      RxBool hasWhitelist =
          bind.mainGetOptionSync(key: 'whitelist').isNotEmpty.obs;
      update() async {
        hasWhitelist.value =
            bind.mainGetOptionSync(key: 'whitelist').isNotEmpty;
      }

      onChanged(bool? checked) async {
        changeWhiteList(callback: update);
      }

      return GestureDetector(
        child: Tooltip(
          message: translate('whitelist_tip'),
          child: Obx(() => Row(
                children: [
                  Checkbox(
                          value: hasWhitelist.value,
                          onChanged: enabled ? onChanged : null)
                      .marginOnly(right: 5),
                  Offstage(
                    offstage: !hasWhitelist.value,
                    child: const Icon(Icons.warning_amber_rounded,
                            color: Color.fromARGB(255, 255, 204, 0))
                        .marginOnly(right: 5),
                  ),
                  Expanded(
                      child: Text(
                    translate('Use IP Whitelisting'),
                    style:
                        TextStyle(color: _disabledTextColor(context, enabled)),
                  ))
                ],
              )),
        ),
        onTap: () {
          onChanged(!hasWhitelist.value);
        },
      ).marginOnly(left: _kCheckBoxLeftMargin);
    }

    return tmpWrapper();
  }

  Widget hide_cm(bool enabled) {
    return ChangeNotifierProvider.value(
        value: gFFI.serverModel,
        child: Consumer<ServerModel>(builder: (context, model, child) {
          final enableHideCm = model.approveMode == 'password' &&
              model.verificationMethod == kUsePermanentPassword;
          onHideCmChanged(bool? b) {
            if (b != null) {
              bind.mainSetOption(
                  key: 'allow-hide-cm', value: bool2option('allow-hide-cm', b));
            }
          }

          return Tooltip(
              message: enableHideCm ? "" : translate('hide_cm_tip'),
              child: GestureDetector(
                onTap:
                    enableHideCm ? () => onHideCmChanged(!model.hideCm) : null,
                child: Row(
                  children: [
                    Checkbox(
                            value: model.hideCm,
                            onChanged: enabled && enableHideCm
                                ? onHideCmChanged
                                : null)
                        .marginOnly(right: 5),
                    Expanded(
                      child: Text(
                        translate('Hide connection management window'),
                        style: TextStyle(
                            color: _disabledTextColor(
                                context, enabled && enableHideCm)),
                      ),
                    ),
                  ],
                ),
              ));
        }));
  }
}

class _Network extends StatefulWidget {
  const _Network({Key? key}) : super(key: key);

  @override
  State<_Network> createState() => _NetworkState();
}

class _NetworkState extends State<_Network> with AutomaticKeepAliveClientMixin {
  @override
  bool get wantKeepAlive => true;
  bool locked = bind.mainIsInstalled();

  @override
  Widget build(BuildContext context) {
    super.build(context);
    bool enabled = !locked;
    final scrollController = ScrollController();
    return DesktopScrollWrapper(
        scrollController: scrollController,
        child: ListView(
            controller: scrollController,
            physics: DraggableNeverScrollableScrollPhysics(),
            children: [
              _lock(locked, 'Unlock Network Settings', () {
                locked = false;
                setState(() => {});
              }),
              AbsorbPointer(
                absorbing: locked,
                child: Column(children: [
                  server(enabled),
                  _Card(title: 'Proxy', children: [
                    _Button('Socks5 Proxy', changeSocks5Proxy,
                        enabled: enabled),
                  ]),
                ]),
              ),
            ]).marginOnly(bottom: _kListViewBottomMargin));
  }

  server(bool enabled) {
    // Simple temp wrapper for PR check
    tmpWrapper() {
      // Setting page is not modal, oldOptions should only be used when getting options, never when setting.
      Map<String, dynamic> oldOptions =
          jsonDecode(bind.mainGetOptionsSync() as String);
      old(String key) {
        return (oldOptions[key] ?? '').trim();
      }

      RxString idErrMsg = ''.obs;
      RxString relayErrMsg = ''.obs;
      RxString apiErrMsg = ''.obs;
      var idController =
          TextEditingController(text: old('custom-rendezvous-server'));
      var relayController = TextEditingController(text: old('relay-server'));
      var apiController = TextEditingController(text: old('api-server'));
      var keyController = TextEditingController(text: old('key'));
      final controllers = [
        idController,
        relayController,
        apiController,
        keyController,
      ];
      final errMsgs = [
        idErrMsg,
        relayErrMsg,
        apiErrMsg,
      ];

      submit() async {
        bool result = await setServerConfig(
            controllers,
            errMsgs,
            ServerConfig(
                idServer: idController.text,
                relayServer: relayController.text,
                apiServer: apiController.text,
                key: keyController.text));
        if (result) {
          setState(() {});
          showToast(translate('Successful'));
        } else {
          showToast(translate('Failed'));
        }
      }

      bool secure = !enabled;
      return _Card(
          title: 'ID/Relay Server',
          title_suffix: ServerConfigImportExportWidgets(controllers, errMsgs),
          children: [
            Column(
              children: [
                Obx(() => _LabeledTextField(context, 'ID Server', idController,
                    idErrMsg.value, enabled, secure)),
                Obx(() => _LabeledTextField(context, 'Relay Server',
                    relayController, relayErrMsg.value, enabled, secure)),
                Obx(() => _LabeledTextField(context, 'API Server',
                    apiController, apiErrMsg.value, enabled, secure)),
                _LabeledTextField(
                    context, 'Key', keyController, '', enabled, secure),
                Row(
                  mainAxisAlignment: MainAxisAlignment.end,
                  children: [_Button('Apply', submit, enabled: enabled)],
                ).marginOnly(top: 10),
              ],
            )
          ]);
    }

    return tmpWrapper();
  }
}

class _Display extends StatefulWidget {
  const _Display({Key? key}) : super(key: key);

  @override
  State<_Display> createState() => _DisplayState();
}

class _DisplayState extends State<_Display> {
  @override
  Widget build(BuildContext context) {
    final scrollController = ScrollController();
    return DesktopScrollWrapper(
        scrollController: scrollController,
        child: ListView(
            controller: scrollController,
            physics: DraggableNeverScrollableScrollPhysics(),
            children: [
              viewStyle(context),
              scrollStyle(context),
              imageQuality(context),
              codec(context),
              other(context),
            ]).marginOnly(bottom: _kListViewBottomMargin));
  }

  Widget viewStyle(BuildContext context) {
    final key = 'view_style';
    onChanged(String value) async {
      await bind.mainSetUserDefaultOption(key: key, value: value);
      setState(() {});
    }

    final groupValue = bind.mainGetUserDefaultOption(key: key);
    return _Card(title: 'Default View Style', children: [
      _Radio(context,
          value: kRemoteViewStyleOriginal,
          groupValue: groupValue,
          label: 'Scale original',
          onChanged: onChanged),
      _Radio(context,
          value: kRemoteViewStyleAdaptive,
          groupValue: groupValue,
          label: 'Scale adaptive',
          onChanged: onChanged),
    ]);
  }

  Widget scrollStyle(BuildContext context) {
    final key = 'scroll_style';
    onChanged(String value) async {
      await bind.mainSetUserDefaultOption(key: key, value: value);
      setState(() {});
    }

    final groupValue = bind.mainGetUserDefaultOption(key: key);
    return _Card(title: 'Default Scroll Style', children: [
      _Radio(context,
          value: kRemoteScrollStyleAuto,
          groupValue: groupValue,
          label: 'ScrollAuto',
          onChanged: onChanged),
      _Radio(context,
          value: kRemoteScrollStyleBar,
          groupValue: groupValue,
          label: 'Scrollbar',
          onChanged: onChanged),
    ]);
  }

  Widget imageQuality(BuildContext context) {
    final key = 'image_quality';
    onChanged(String value) async {
      await bind.mainSetUserDefaultOption(key: key, value: value);
      setState(() {});
    }

    final groupValue = bind.mainGetUserDefaultOption(key: key);
    return _Card(title: 'Default Image Quality', children: [
      _Radio(context,
          value: kRemoteImageQualityBest,
          groupValue: groupValue,
          label: 'Good image quality',
          onChanged: onChanged),
      _Radio(context,
          value: kRemoteImageQualityBalanced,
          groupValue: groupValue,
          label: 'Balanced',
          onChanged: onChanged),
      _Radio(context,
          value: kRemoteImageQualityLow,
          groupValue: groupValue,
          label: 'Optimize reaction time',
          onChanged: onChanged),
      _Radio(context,
          value: kRemoteImageQualityCustom,
          groupValue: groupValue,
          label: 'Custom',
          onChanged: onChanged),
      Offstage(
        offstage: groupValue != kRemoteImageQualityCustom,
        child: customImageQualitySetting(),
      )
    ]);
  }

  Widget codec(BuildContext context) {
    final key = 'codec-preference';
    onChanged(String value) async {
      await bind.mainSetUserDefaultOption(key: key, value: value);
      setState(() {});
    }

    final groupValue = bind.mainGetUserDefaultOption(key: key);
    var hwRadios = [];
    try {
      final Map codecsJson = jsonDecode(bind.mainSupportedHwdecodings());
      final h264 = codecsJson['h264'] ?? false;
      final h265 = codecsJson['h265'] ?? false;
      if (h264) {
        hwRadios.add(_Radio(context,
            value: 'h264',
            groupValue: groupValue,
            label: 'H264',
            onChanged: onChanged));
      }
      if (h265) {
        hwRadios.add(_Radio(context,
            value: 'h265',
            groupValue: groupValue,
            label: 'H265',
            onChanged: onChanged));
      }
    } catch (e) {
      debugPrint("failed to parse supported hwdecodings, err=$e");
    }
    return _Card(title: 'Default Codec', children: [
      _Radio(context,
          value: 'auto',
          groupValue: groupValue,
          label: 'Auto',
          onChanged: onChanged),
      _Radio(context,
          value: 'vp8',
          groupValue: groupValue,
          label: 'VP8',
          onChanged: onChanged),
      _Radio(context,
          value: 'vp9',
          groupValue: groupValue,
          label: 'VP9',
          onChanged: onChanged),
      _Radio(context,
          value: 'av1',
          groupValue: groupValue,
          label: 'AV1',
          onChanged: onChanged),
      ...hwRadios,
    ]);
  }

  Widget otherRow(String label, String key) {
    final value = bind.mainGetUserDefaultOption(key: key) == 'Y';
    onChanged(bool b) async {
      await bind.mainSetUserDefaultOption(key: key, value: b ? 'Y' : '');
      setState(() {});
    }

    return GestureDetector(
        child: Row(
          children: [
            Checkbox(value: value, onChanged: (_) => onChanged(!value))
                .marginOnly(right: 5),
            Expanded(
              child: Text(translate(label)),
            )
          ],
        ).marginOnly(left: _kCheckBoxLeftMargin),
        onTap: () => onChanged(!value));
  }

  Widget other(BuildContext context) {
    return _Card(title: 'Other Default Options', children: [
      otherRow('View Mode', 'view_only'),
      otherRow('show_monitors_tip', 'show_monitors_toolbar'),
      otherRow('Collapse toolbar', 'collapse_toolbar'),
      otherRow('Show remote cursor', 'show_remote_cursor'),
      otherRow('Zoom cursor', 'zoom-cursor'),
      otherRow('Show quality monitor', 'show_quality_monitor'),
      otherRow('Mute', 'disable_audio'),
      otherRow('Allow file copy and paste', 'enable_file_transfer'),
      otherRow('Disable clipboard', 'disable_clipboard'),
      otherRow('Lock after session end', 'lock_after_session_end'),
      otherRow('Privacy mode', 'privacy_mode'),
      otherRow('Reverse mouse wheel', 'reverse_mouse_wheel'),
    ]);
  }
}

class _Account extends StatefulWidget {
  const _Account({Key? key}) : super(key: key);

  @override
  State<_Account> createState() => _AccountState();
}

class _AccountState extends State<_Account> {
  @override
  Widget build(BuildContext context) {
    final scrollController = ScrollController();
    return DesktopScrollWrapper(
        scrollController: scrollController,
        child: ListView(
          physics: DraggableNeverScrollableScrollPhysics(),
          controller: scrollController,
          children: [
            _Card(title: 'Account', children: [accountAction(), useInfo()]),
          ],
        ).marginOnly(bottom: _kListViewBottomMargin));
  }

  Widget accountAction() {
    return Obx(() => _Button(
        gFFI.userModel.userName.value.isEmpty ? 'Login' : 'Logout',
        () => {
              gFFI.userModel.userName.value.isEmpty
                  ? loginDialog()
                  : logOutConfirmDialog()
            }));
  }

  Widget useInfo() {
    text(String key, String value) {
      return Align(
        alignment: Alignment.centerLeft,
        child: SelectionArea(child: Text('${translate(key)}: $value'))
            .marginSymmetric(vertical: 4),
      );
    }

    return Obx(() => Offstage(
          offstage: gFFI.userModel.userName.value.isEmpty,
          child: Column(
            children: [
              text('Username', gFFI.userModel.userName.value),
              // text('Group', gFFI.groupModel.groupName.value),
            ],
          ),
        )).marginOnly(left: 18, top: 16);
  }
}

class _Checkbox extends StatefulWidget {
  final String label;
  final bool Function() getValue;
  final Future<void> Function(bool) setValue;

  const _Checkbox(
      {Key? key,
      required this.label,
      required this.getValue,
      required this.setValue})
      : super(key: key);

  @override
  State<_Checkbox> createState() => _CheckboxState();
}

class _CheckboxState extends State<_Checkbox> {
  var value = false;

  @override
  initState() {
    super.initState();
    value = widget.getValue();
  }

  @override
  Widget build(BuildContext context) {
    onChanged(bool b) async {
      await widget.setValue(b);
      setState(() {
        value = widget.getValue();
      });
    }

    return GestureDetector(
      child: Row(
        children: [
          Checkbox(
            value: value,
            onChanged: (_) => onChanged(!value),
          ).marginOnly(right: 5),
          Expanded(
            child: Text(translate(widget.label)),
          )
        ],
      ).marginOnly(left: _kCheckBoxLeftMargin),
      onTap: () => onChanged(!value),
    );
  }
}

class _Plugin extends StatefulWidget {
  const _Plugin({Key? key}) : super(key: key);

  @override
  State<_Plugin> createState() => _PluginState();
}

class _PluginState extends State<_Plugin> {
  @override
  Widget build(BuildContext context) {
    bind.pluginListReload();
    final scrollController = ScrollController();
    return DesktopScrollWrapper(
      scrollController: scrollController,
      child: ChangeNotifierProvider.value(
        value: pluginManager,
        child: Consumer<PluginManager>(builder: (context, model, child) {
          return ListView(
            physics: DraggableNeverScrollableScrollPhysics(),
            controller: scrollController,
            children: model.plugins.map((entry) => pluginCard(entry)).toList(),
          ).marginOnly(bottom: _kListViewBottomMargin);
        }),
      ),
    );
  }

  Widget pluginCard(PluginInfo plugin) {
    return ChangeNotifierProvider.value(
      value: plugin,
      child: Consumer<PluginInfo>(
        builder: (context, model, child) => DesktopSettingsCard(plugin: model),
      ),
    );
  }

  Widget accountAction() {
    return Obx(() => _Button(
        gFFI.userModel.userName.value.isEmpty ? 'Login' : 'Logout',
        () => {
              gFFI.userModel.userName.value.isEmpty
                  ? loginDialog()
                  : logOutConfirmDialog()
            }));
  }
}

class _About extends StatefulWidget {
  const _About({Key? key}) : super(key: key);

  @override
  State<_About> createState() => _AboutState();
}

class _AboutState extends State<_About> {
  @override
  Widget build(BuildContext context) {
    return futureBuilder(future: () async {
      final license = await bind.mainGetLicense();
      final version = await bind.mainGetVersion();
      final buildDate = await bind.mainGetBuildDate();
      final fingerprint = await bind.mainGetFingerprint();
      return {
        'license': license,
        'version': version,
        'buildDate': buildDate,
        'fingerprint': fingerprint
      };
    }(), hasData: (data) {
      final license = data['license'].toString();
      final version = data['version'].toString();
      final buildDate = data['buildDate'].toString();
      final fingerprint = data['fingerprint'].toString();
      const linkStyle = TextStyle(decoration: TextDecoration.underline);
      final scrollController = ScrollController();
      return DesktopScrollWrapper(
          scrollController: scrollController,
          child: SingleChildScrollView(
            controller: scrollController,
            physics: DraggableNeverScrollableScrollPhysics(),
            child: _Card(title: '${translate('About')} RustDesk', children: [
              Column(
                crossAxisAlignment: CrossAxisAlignment.start,
                children: [
                  const SizedBox(
                    height: 8.0,
                  ),
                  SelectionArea(
                      child: Text('${translate('Version')}: $version')
                          .marginSymmetric(vertical: 4.0)),
                  SelectionArea(
                      child: Text('${translate('Build Date')}: $buildDate')
                          .marginSymmetric(vertical: 4.0)),
                  SelectionArea(
                      child: Text('${translate('Fingerprint')}: $fingerprint')
                          .marginSymmetric(vertical: 4.0)),
                  InkWell(
                      onTap: () {
                        launchUrlString('https://rustdesk.com/privacy.html');
                      },
                      child: Text(
                        translate('Privacy Statement'),
                        style: linkStyle,
                      ).marginSymmetric(vertical: 4.0)),
                  InkWell(
                      onTap: () {
                        launchUrlString('https://rustdesk.com');
                      },
                      child: Text(
                        translate('Website'),
                        style: linkStyle,
                      ).marginSymmetric(vertical: 4.0)),
                  Container(
                    decoration: const BoxDecoration(color: Color(0xFF2c8cff)),
                    padding:
                        const EdgeInsets.symmetric(vertical: 24, horizontal: 8),
                    child: SelectionArea(
                        child: Row(
                      children: [
                        Expanded(
                          child: Column(
                            crossAxisAlignment: CrossAxisAlignment.start,
                            children: [
                              Text(
                                'Copyright © 2023 Purslane Ltd.\n$license',
                                style: const TextStyle(color: Colors.white),
                              ),
                              Text(
                                translate('Slogan_tip'),
                                style: TextStyle(
                                    fontWeight: FontWeight.w800,
                                    color: Colors.white),
                              )
                            ],
                          ),
                        ),
                      ],
                    )),
                  ).marginSymmetric(vertical: 4.0)
                ],
              ).marginOnly(left: _kContentHMargin)
            ]),
          ));
    });
  }
}

//#endregion

//#region components

// ignore: non_constant_identifier_names
Widget _Card(
    {required String title,
    required List<Widget> children,
    List<Widget>? title_suffix}) {
  return Row(
    children: [
      Flexible(
        child: SizedBox(
          width: _kCardFixedWidth,
          child: Card(
            child: Column(
              children: [
                Row(
                  children: [
                    Expanded(
                        child: Text(
                      translate(title),
                      textAlign: TextAlign.start,
                      style: const TextStyle(
                        fontSize: _kTitleFontSize,
                      ),
                    )),
                    ...?title_suffix
                  ],
                ).marginOnly(left: _kContentHMargin, top: 10, bottom: 10),
                ...children
                    .map((e) => e.marginOnly(top: 4, right: _kContentHMargin)),
              ],
            ).marginOnly(bottom: 10),
          ).marginOnly(left: _kCardLeftMargin, top: 15),
        ),
      ),
    ],
  );
}

Color? _disabledTextColor(BuildContext context, bool enabled) {
  return enabled
      ? null
      : Theme.of(context).textTheme.titleLarge?.color?.withOpacity(0.6);
}

// ignore: non_constant_identifier_names
Widget _OptionCheckBox(BuildContext context, String label, String key,
    {Function()? update,
    bool reverse = false,
    bool enabled = true,
    Icon? checkedIcon,
    bool? fakeValue,
    bool isServer = true}) {
  bool value =
      isServer ? mainGetBoolOptionSync(key) : mainGetLocalBoolOptionSync(key);
  if (reverse) value = !value;
  var ref = value.obs;
  onChanged(option) async {
    if (option != null) {
      if (reverse) option = !option;
      isServer
          ? await mainSetBoolOption(key, option)
          : await mainSetLocalBoolOption(key, option);
      final readOption = isServer
          ? mainGetBoolOptionSync(key)
          : mainGetLocalBoolOptionSync(key);
      if (reverse) {
        ref.value = !readOption;
      } else {
        ref.value = readOption;
      }
      update?.call();
    }
  }

  if (fakeValue != null) {
    ref.value = fakeValue;
    enabled = false;
  }

  return GestureDetector(
    child: Obx(
      () => Row(
        children: [
          Checkbox(value: ref.value, onChanged: enabled ? onChanged : null)
              .marginOnly(right: 5),
          Offstage(
            offstage: !ref.value || checkedIcon == null,
            child: checkedIcon?.marginOnly(right: 5),
          ),
          Expanded(
              child: Text(
            translate(label),
            style: TextStyle(color: _disabledTextColor(context, enabled)),
          ))
        ],
      ),
    ).marginOnly(left: _kCheckBoxLeftMargin),
    onTap: enabled
        ? () {
            onChanged(!ref.value);
          }
        : null,
  );
}

// ignore: non_constant_identifier_names
Widget _Radio<T>(BuildContext context,
    {required T value,
    required T groupValue,
    required String label,
    required Function(T value) onChanged,
    bool autoNewLine = true,
    bool enabled = true}) {
  var onChange = enabled
      ? (T? value) {
          if (value != null) {
            onChanged(value);
          }
        }
      : null;
  return GestureDetector(
    child: Row(
      children: [
        Radio<T>(value: value, groupValue: groupValue, onChanged: onChange),
        Expanded(
          child: Text(translate(label),
                  overflow: autoNewLine ? null : TextOverflow.ellipsis,
                  style: TextStyle(
                      fontSize: _kContentFontSize,
                      color: _disabledTextColor(context, enabled)))
              .marginOnly(left: 5),
        ),
      ],
    ).marginOnly(left: _kRadioLeftMargin),
    onTap: () => onChange?.call(value),
  );
}

// ignore: non_constant_identifier_names
Widget _Button(String label, Function() onPressed,
    {bool enabled = true, String? tip}) {
  var button = ElevatedButton(
    onPressed: enabled ? onPressed : null,
    child: Text(
      translate(label),
    ).marginSymmetric(horizontal: 15),
  );
  StatefulWidget child;
  if (tip == null) {
    child = button;
  } else {
    child = Tooltip(message: translate(tip), child: button);
  }
  return Row(children: [
    child,
  ]).marginOnly(left: _kContentHMargin);
}

// ignore: non_constant_identifier_names
Widget _SubButton(String label, Function() onPressed, [bool enabled = true]) {
  return Row(
    children: [
      ElevatedButton(
        onPressed: enabled ? onPressed : null,
        child: Text(
          translate(label),
        ).marginSymmetric(horizontal: 15),
      ),
    ],
  ).marginOnly(left: _kContentHSubMargin);
}

// ignore: non_constant_identifier_names
Widget _SubLabeledWidget(BuildContext context, String label, Widget child,
    {bool enabled = true}) {
  return Row(
    children: [
      Text(
        '${translate(label)}: ',
        style: TextStyle(color: _disabledTextColor(context, enabled)),
      ),
      SizedBox(
        width: 10,
      ),
      child,
    ],
  ).marginOnly(left: _kContentHSubMargin);
}

Widget _lock(
  bool locked,
  String label,
  Function() onUnlock,
) {
  return Offstage(
      offstage: !locked,
      child: Row(
        children: [
          Flexible(
            child: SizedBox(
              width: _kCardFixedWidth,
              child: Card(
                child: ElevatedButton(
                  child: SizedBox(
                      height: 25,
                      child: Row(
                          mainAxisAlignment: MainAxisAlignment.center,
                          children: [
                            const Icon(
                              Icons.security_sharp,
                              size: 20,
                            ),
                            Text(translate(label)).marginOnly(left: 5),
                          ]).marginSymmetric(vertical: 2)),
                  onPressed: () async {
                    bool checked = await callMainCheckSuperUserPermission();
                    if (checked) {
                      onUnlock();
                    }
                  },
                ).marginSymmetric(horizontal: 2, vertical: 4),
              ).marginOnly(left: _kCardLeftMargin),
            ).marginOnly(top: 10),
          ),
        ],
      ));
}

_LabeledTextField(
    BuildContext context,
    String label,
    TextEditingController controller,
    String errorText,
    bool enabled,
    bool secure) {
  return Row(
    children: [
      ConstrainedBox(
          constraints: const BoxConstraints(minWidth: 140),
          child: Text(
            '${translate(label)}:',
            textAlign: TextAlign.right,
            style: TextStyle(
                fontSize: 16, color: _disabledTextColor(context, enabled)),
          ).marginOnly(right: 10)),
      Expanded(
        child: TextField(
            controller: controller,
            enabled: enabled,
            obscureText: secure,
            decoration: InputDecoration(
                errorText: errorText.isNotEmpty ? errorText : null),
            style: TextStyle(
              color: _disabledTextColor(context, enabled),
            )),
      ),
    ],
  ).marginOnly(bottom: 8);
}

// ignore: must_be_immutable
class _ComboBox extends StatelessWidget {
  late final List<String> keys;
  late final List<String> values;
  late final String initialKey;
  late final Function(String key) onChanged;
  late final bool enabled;
  late String current;

  _ComboBox({
    Key? key,
    required this.keys,
    required this.values,
    required this.initialKey,
    required this.onChanged,
    this.enabled = true,
  }) : super(key: key);

  @override
  Widget build(BuildContext context) {
    var index = keys.indexOf(initialKey);
    if (index < 0) {
      index = 0;
    }
    var ref = values[index].obs;
    current = keys[index];
    return Container(
      decoration: BoxDecoration(
        border: Border.all(
          color: enabled
              ? MyTheme.color(context).border2 ?? MyTheme.border
              : MyTheme.border,
        ),
        borderRadius:
            BorderRadius.circular(8), //border raiuds of dropdown button
      ),
      height: 42, // should be the height of a TextField
      child: Obx(() => DropdownButton<String>(
            isExpanded: true,
            value: ref.value,
            elevation: 16,
            underline: Container(),
            style: TextStyle(
                color: enabled
                    ? Theme.of(context).textTheme.titleMedium?.color
                    : _disabledTextColor(context, enabled)),
            icon: const Icon(
              Icons.expand_more_sharp,
              size: 20,
            ).marginOnly(right: 15),
            onChanged: enabled
                ? (String? newValue) {
                    if (newValue != null && newValue != ref.value) {
                      ref.value = newValue;
                      current = newValue;
                      onChanged(keys[values.indexOf(newValue)]);
                    }
                  }
                : null,
            items: values.map<DropdownMenuItem<String>>((String value) {
              return DropdownMenuItem<String>(
                value: value,
                child: Text(
                  value,
                  style: const TextStyle(fontSize: _kContentFontSize),
                  overflow: TextOverflow.ellipsis,
                ).marginOnly(left: 15),
              );
            }).toList(),
          )),
    ).marginOnly(bottom: 5);
  }
}

//#endregion

//#region dialogs

void changeSocks5Proxy() async {
  var socks = await bind.mainGetSocks();

  String proxy = '';
  String proxyMsg = '';
  String username = '';
  String password = '';
  if (socks.length == 3) {
    proxy = socks[0];
    username = socks[1];
    password = socks[2];
  }
  var proxyController = TextEditingController(text: proxy);
  var userController = TextEditingController(text: username);
  var pwdController = TextEditingController(text: password);
  RxBool obscure = true.obs;

  var isInProgress = false;
  gFFI.dialogManager.show((setState, close, context) {
    submit() async {
      setState(() {
        proxyMsg = '';
        isInProgress = true;
      });
      cancel() {
        setState(() {
          isInProgress = false;
        });
      }

      proxy = proxyController.text.trim();
      username = userController.text.trim();
      password = pwdController.text.trim();

      if (proxy.isNotEmpty) {
        proxyMsg = translate(await bind.mainTestIfValidServer(server: proxy));
        if (proxyMsg.isEmpty) {
          // ignore
        } else {
          cancel();
          return;
        }
      }
      await bind.mainSetSocks(
          proxy: proxy, username: username, password: password);
      close();
    }

    return CustomAlertDialog(
      title: Text(translate('Socks5 Proxy')),
      content: ConstrainedBox(
        constraints: const BoxConstraints(minWidth: 500),
        child: Column(
          crossAxisAlignment: CrossAxisAlignment.start,
          children: [
            Row(
              children: [
                ConstrainedBox(
                    constraints: const BoxConstraints(minWidth: 140),
                    child: Text(
                      '${translate("Hostname")}:',
                      textAlign: TextAlign.right,
                    ).marginOnly(right: 10)),
                Expanded(
                  child: TextField(
                    decoration: InputDecoration(
                        errorText: proxyMsg.isNotEmpty ? proxyMsg : null),
                    controller: proxyController,
                    autofocus: true,
                  ),
                ),
              ],
            ).marginOnly(bottom: 8),
            Row(
              children: [
                ConstrainedBox(
                    constraints: const BoxConstraints(minWidth: 140),
                    child: Text(
                      '${translate("Username")}:',
                      textAlign: TextAlign.right,
                    ).marginOnly(right: 10)),
                Expanded(
                  child: TextField(
                    controller: userController,
                  ),
                ),
              ],
            ).marginOnly(bottom: 8),
            Row(
              children: [
                ConstrainedBox(
                    constraints: const BoxConstraints(minWidth: 140),
                    child: Text(
                      '${translate("Password")}:',
                      textAlign: TextAlign.right,
                    ).marginOnly(right: 10)),
                Expanded(
                  child: Obx(() => TextField(
                        obscureText: obscure.value,
                        decoration: InputDecoration(
                            suffixIcon: IconButton(
                                onPressed: () => obscure.value = !obscure.value,
                                icon: Icon(obscure.value
                                    ? Icons.visibility_off
                                    : Icons.visibility))),
                        controller: pwdController,
                      )),
                ),
              ],
            ),
            // NOT use Offstage to wrap LinearProgressIndicator
            if (isInProgress)
              const LinearProgressIndicator().marginOnly(top: 8),
          ],
        ),
      ),
      actions: [
        dialogButton('Cancel', onPressed: close, isOutline: true),
        dialogButton('OK', onPressed: submit),
      ],
      onSubmit: submit,
      onCancel: close,
    );
  });
}

//#endregion