import 'dart:async';
import 'dart:convert';
import 'dart:io';
import 'dart:typed_data';

import 'package:back_button_interceptor/back_button_interceptor.dart';
import 'package:desktop_multi_window/desktop_multi_window.dart';
import 'package:flutter/gestures.dart';
import 'package:flutter/material.dart';
import 'package:flutter/services.dart';
import 'package:flutter_hbb/desktop/widgets/tabbar_widget.dart';
import 'package:flutter_hbb/models/peer_model.dart';
import 'package:get/get.dart';
import 'package:shared_preferences/shared_preferences.dart';
import 'package:window_manager/window_manager.dart';

import 'models/model.dart';
import 'models/platform_model.dart';

final globalKey = GlobalKey<NavigatorState>();
final navigationBarKey = GlobalKey();

final isAndroid = Platform.isAndroid;
final isIOS = Platform.isIOS;
final isDesktop = Platform.isWindows || Platform.isMacOS || Platform.isLinux;
var isWeb = false;
var isWebDesktop = false;
var version = "";
int androidVersion = 0;

typedef F = String Function(String);
typedef FMethod = String Function(String, dynamic);

late final iconKeyboard = MemoryImage(Uint8List.fromList(base64Decode(
    "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")));
late final iconClipboard = MemoryImage(Uint8List.fromList(base64Decode(
    'iVBORw0KGgoAAAANSUhEUgAAACAAAAAgCAMAAABEpIrGAAAAjVBMVEUAAAD///////////////////////////////////////////////////////////////////////////////////////////////////////////////////////////////////////////////////////////////////////////////////////8DizOFAAAALnRSTlMAnIsyZy8YZF3NSAuabRL34cq6trCScyZ4qI9CQDwV+fPl2tnTwzkeB+m/pIFK/Xx0ewAAAQlJREFUOMudktduhDAQRWep69iY3tle0+7/f16Qg7MsJUQ5Dwh8jzRzhemJPIaf3GiW7eFQfOwDPp1ek/iMnKgBi5PrhJAhZAa1lCxE9pw5KWMswOMAQXuQOvqTB7tLFJ36wimKLrufZTzUaoRtdthqRA2vEwS+tR4qguiElRKk1YMrYfUQRkwLmwVBYDMvJKF8R0o3V2MOhNrfo+hXSYYjPn1L/S+n438t8gWh+q1F+cYFBMm1Jh8Ia7y2OWXQxMMRLqr2eTc1crSD84cWfEGwYM4LlaACEee2ZjsQXJxR3qmYb+GpC8ZfNM5oh3yxxbxgQE7lEkb3ZvvH1BiRHn1bu02ICcKGWr4AudUkyYxmvywAAAAASUVORK5CYII=')));
late final iconAudio = MemoryImage(Uint8List.fromList(base64Decode(
    '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')));
late final iconFile = MemoryImage(Uint8List.fromList(base64Decode(
    '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')));
late final iconRestart = MemoryImage(Uint8List.fromList(base64Decode(
    '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')));

class IconFont {
  static const _family1 = 'Tabbar';
  static const _family2 = 'PeerSearchbar';
  IconFont._();

  static const IconData max = IconData(0xe606, fontFamily: _family1);
  static const IconData restore = IconData(0xe607, fontFamily: _family1);
  static const IconData close = IconData(0xe668, fontFamily: _family1);
  static const IconData min = IconData(0xe609, fontFamily: _family1);
  static const IconData add = IconData(0xe664, fontFamily: _family1);
  static const IconData menu = IconData(0xe628, fontFamily: _family1);
  static const IconData search = IconData(0xe6a4, fontFamily: _family2);
  static const IconData round_close = IconData(0xe6ed, fontFamily: _family2);
}

class ColorThemeExtension extends ThemeExtension<ColorThemeExtension> {
  const ColorThemeExtension({
    required this.bg,
    required this.grayBg,
    required this.text,
    required this.lightText,
    required this.lighterText,
    required this.placeholder,
    required this.border,
  });

  final Color? bg;
  final Color? grayBg;
  final Color? text;
  final Color? lightText;
  final Color? lighterText;
  final Color? placeholder;
  final Color? border;

  static const light = ColorThemeExtension(
    bg: Color(0xFFFFFFFF),
    grayBg: Color(0xFFEEEEEE),
    text: Color(0xFF222222),
    lightText: Color(0xFF666666),
    lighterText: Color(0xFF888888),
    placeholder: Color(0xFFAAAAAA),
    border: Color(0xFFCCCCCC),
  );

  static const dark = ColorThemeExtension(
    bg: Color(0xFF252525),
    grayBg: Color(0xFF141414),
    text: Color(0xFFFFFFFF),
    lightText: Color(0xFF999999),
    lighterText: Color(0xFF777777),
    placeholder: Color(0xFF555555),
    border: Color(0xFF555555),
  );

  @override
  ThemeExtension<ColorThemeExtension> copyWith(
      {Color? bg,
      Color? grayBg,
      Color? text,
      Color? lightText,
      Color? lighterText,
      Color? placeholder,
      Color? border}) {
    return ColorThemeExtension(
      bg: bg ?? this.bg,
      grayBg: grayBg ?? this.grayBg,
      text: text ?? this.text,
      lightText: lightText ?? this.lightText,
      lighterText: lighterText ?? this.lighterText,
      placeholder: placeholder ?? this.placeholder,
      border: border ?? this.border,
    );
  }

  @override
  ThemeExtension<ColorThemeExtension> lerp(
      ThemeExtension<ColorThemeExtension>? other, double t) {
    if (other is! ColorThemeExtension) {
      return this;
    }
    return ColorThemeExtension(
      bg: Color.lerp(bg, other.bg, t),
      grayBg: Color.lerp(grayBg, other.grayBg, t),
      text: Color.lerp(text, other.text, t),
      lightText: Color.lerp(lightText, other.lightText, t),
      lighterText: Color.lerp(lighterText, other.lighterText, t),
      placeholder: Color.lerp(placeholder, other.placeholder, t),
      border: Color.lerp(border, other.border, t),
    );
  }
}

class MyTheme {
  MyTheme._();

  static const Color grayBg = Color(0xFFEEEEEE);
  static const Color white = Color(0xFFFFFFFF);
  static const Color accent = Color(0xFF0071FF);
  static const Color accent50 = Color(0x770071FF);
  static const Color accent80 = Color(0xAA0071FF);
  static const Color canvasColor = Color(0xFF212121);
  static const Color border = Color(0xFFCCCCCC);
  static const Color idColor = Color(0xFF00B6F0);
  static const Color darkGray = Color(0xFFB9BABC);
  static const Color cmIdColor = Color(0xFF21790B);
  static const Color dark = Colors.black87;
  static const Color button = Color(0xFF2C8CFF);
  static const Color hoverBorder = Color(0xFF999999);

  static ThemeData lightTheme = ThemeData(
    brightness: Brightness.light,
    primarySwatch: Colors.blue,
    visualDensity: VisualDensity.adaptivePlatformDensity,
    tabBarTheme: const TabBarTheme(
      labelColor: Colors.black87,
    ),
    splashColor: Colors.transparent,
    highlightColor: Colors.transparent,
  ).copyWith(
    extensions: <ThemeExtension<dynamic>>[
      ColorThemeExtension.light,
      TabbarTheme.light,
    ],
  );
  static ThemeData darkTheme = ThemeData(
    brightness: Brightness.dark,
    primarySwatch: Colors.blue,
    visualDensity: VisualDensity.adaptivePlatformDensity,
    tabBarTheme: const TabBarTheme(
      labelColor: Colors.white70,
    ),
    splashColor: Colors.transparent,
    highlightColor: Colors.transparent,
  ).copyWith(
    extensions: <ThemeExtension<dynamic>>[
      ColorThemeExtension.dark,
      TabbarTheme.dark,
    ],
  );

  static ColorThemeExtension color(BuildContext context) {
    return Theme.of(context).extension<ColorThemeExtension>()!;
  }

  static TabbarTheme tabbar(BuildContext context) {
    return Theme.of(context).extension<TabbarTheme>()!;
  }
}

bool isDarkTheme() {
  final isDark = "Y" == Get.find<SharedPreferences>().getString("darkTheme");
  return isDark;
}

final ButtonStyle flatButtonStyle = TextButton.styleFrom(
  minimumSize: Size(0, 36),
  padding: EdgeInsets.symmetric(horizontal: 16.0, vertical: 10.0),
  shape: const RoundedRectangleBorder(
    borderRadius: BorderRadius.all(Radius.circular(2.0)),
  ),
);

String formatDurationToTime(Duration duration) {
  var totalTime = duration.inSeconds;
  final secs = totalTime % 60;
  totalTime = (totalTime - secs) ~/ 60;
  final mins = totalTime % 60;
  totalTime = (totalTime - mins) ~/ 60;
  return "${totalTime.toString().padLeft(2, "0")}:${mins.toString().padLeft(2, "0")}:${secs.toString().padLeft(2, "0")}";
}

closeConnection({String? id}) {
  if (isAndroid || isIOS) {
    Navigator.popUntil(globalKey.currentContext!, ModalRoute.withName("/"));
  } else {
    final controller = Get.find<DesktopTabController>();
    controller.closeBy(id);
  }
}

void window_on_top(int? id) {
  if (id == null) {
    // main window
    windowManager.restore();
    windowManager.show();
    windowManager.focus();
  } else {
    WindowController.fromWindowId(id)
      ..focus()
      ..show();
  }
}

typedef DialogBuilder = CustomAlertDialog Function(
    StateSetter setState, void Function([dynamic]) close);

class Dialog<T> {
  OverlayEntry? entry;
  Completer<T?> completer = Completer<T?>();

  Dialog();

  void complete(T? res) {
    try {
      if (!completer.isCompleted) {
        completer.complete(res);
      }
    } catch (e) {
      debugPrint("Dialog complete catch error: $e");
    } finally {
      entry?.remove();
    }
  }
}

class OverlayDialogManager {
  OverlayState? _overlayState;
  Map<String, Dialog> _dialogs = Map();
  int _tagCount = 0;

  /// By default OverlayDialogManager use global overlay
  OverlayDialogManager() {
    _overlayState = globalKey.currentState?.overlay;
  }

  void setOverlayState(OverlayState? overlayState) {
    _overlayState = overlayState;
  }

  void dismissAll() {
    _dialogs.forEach((key, value) {
      value.complete(null);
      BackButtonInterceptor.removeByName(key);
    });
    _dialogs.clear();
  }

  void dismissByTag(String tag) {
    _dialogs[tag]?.complete(null);
    _dialogs.remove(tag);
    BackButtonInterceptor.removeByName(tag);
  }

  Future<T?> show<T>(DialogBuilder builder,
      {bool clickMaskDismiss = false,
      bool backDismiss = false,
      String? tag,
      bool useAnimation = true,
      bool forceGlobal = false}) {
    final overlayState =
        forceGlobal ? globalKey.currentState?.overlay : _overlayState;

    if (overlayState == null) {
      return Future.error(
          "[OverlayDialogManager] Failed to show dialog, _overlayState is null, call [setOverlayState] first");
    }

    final _tag;
    if (tag != null) {
      _tag = tag;
    } else {
      _tag = _tagCount.toString();
      _tagCount++;
    }

    final dialog = Dialog<T>();
    _dialogs[_tag] = dialog;

    final close = ([res]) {
      _dialogs.remove(_tag);
      dialog.complete(res);
      BackButtonInterceptor.removeByName(_tag);
    };
    dialog.entry = OverlayEntry(builder: (_) {
      bool innerClicked = false;
      return Listener(
          onPointerUp: (_) {
            if (!innerClicked && clickMaskDismiss) {
              close();
            }
            innerClicked = false;
          },
          child: Container(
              color: Colors.black12,
              child: StatefulBuilder(builder: (context, setState) {
                return Listener(
                  onPointerUp: (_) => innerClicked = true,
                  child: builder(setState, close),
                );
              })));
    });
    overlayState.insert(dialog.entry!);
    BackButtonInterceptor.add((stopDefaultButtonEvent, routeInfo) {
      if (backDismiss) {
        close();
      }
      return true;
    }, name: _tag);
    return dialog.completer.future;
  }

  void showLoading(String text,
      {bool clickMaskDismiss = false,
      bool showCancel = true,
      VoidCallback? onCancel}) {
    show((setState, close) {
      cancel() {
        dismissAll();
        if (onCancel != null) {
          onCancel();
        }
      }

      return CustomAlertDialog(
        content: Container(
            constraints: const BoxConstraints(maxWidth: 240),
            child: Column(
                mainAxisSize: MainAxisSize.min,
                crossAxisAlignment: CrossAxisAlignment.start,
                children: [
                  const SizedBox(height: 30),
                  const Center(child: CircularProgressIndicator()),
                  const SizedBox(height: 20),
                  Center(
                      child: Text(translate(text),
                          style: const TextStyle(fontSize: 15))),
                  const SizedBox(height: 20),
                  Offstage(
                      offstage: !showCancel,
                      child: Center(
                          child: TextButton(
                              style: flatButtonStyle,
                              onPressed: cancel,
                              child: Text(translate('Cancel'),
                                  style:
                                      const TextStyle(color: MyTheme.accent)))))
                ])),
        onCancel: showCancel ? cancel : null,
      );
    });
  }
}

void showToast(String text, {Duration timeout = const Duration(seconds: 2)}) {
  final overlayState = globalKey.currentState?.overlay;
  if (overlayState == null) return;
  final entry = OverlayEntry(builder: (_) {
    return IgnorePointer(
        child: Align(
            alignment: const Alignment(0.0, 0.8),
            child: Container(
              decoration: BoxDecoration(
                color: Colors.black.withOpacity(0.6),
                borderRadius: const BorderRadius.all(
                  Radius.circular(20),
                ),
              ),
              padding: const EdgeInsets.symmetric(horizontal: 20, vertical: 5),
              child: Text(
                text,
                style: const TextStyle(
                    decoration: TextDecoration.none,
                    fontWeight: FontWeight.w300,
                    fontSize: 18,
                    color: Colors.white),
              ),
            )));
  });
  overlayState.insert(entry);
  Future.delayed(timeout, () {
    entry.remove();
  });
}

class CustomAlertDialog extends StatelessWidget {
  const CustomAlertDialog(
      {Key? key,
      this.title,
      required this.content,
      this.actions,
      this.contentPadding,
      this.onSubmit,
      this.onCancel})
      : super(key: key);

  final Widget? title;
  final Widget content;
  final List<Widget>? actions;
  final double? contentPadding;
  final Function()? onSubmit;
  final Function()? onCancel;

  @override
  Widget build(BuildContext context) {
    FocusNode focusNode = FocusNode();
    // request focus if there is no focused FocusNode in the dialog
    Future.delayed(Duration.zero, () {
      if (!focusNode.hasFocus) focusNode.requestFocus();
    });
    return Focus(
      focusNode: focusNode,
      autofocus: true,
      onKey: (node, key) {
        if (key.logicalKey == LogicalKeyboardKey.escape) {
          if (key is RawKeyDownEvent) {
            onCancel?.call();
          }
          return KeyEventResult.handled; // avoid TextField exception on escape
        } else if (onSubmit != null &&
            key.logicalKey == LogicalKeyboardKey.enter) {
          if (key is RawKeyDownEvent) onSubmit?.call();
          return KeyEventResult.handled;
        }
        return KeyEventResult.ignored;
      },
      child: AlertDialog(
        scrollable: true,
        title: title,
        contentPadding: EdgeInsets.symmetric(
            horizontal: contentPadding ?? 25, vertical: 10),
        content: content,
        actions: actions,
      ),
    );
  }
}

void msgBox(
    String type, String title, String text, OverlayDialogManager dialogManager,
    {bool? hasCancel}) {
  dialogManager.dismissAll();
  List<Widget> buttons = [];
  bool hasOk = false;
  submit() {
    dialogManager.dismissAll();
    // https://github.com/fufesou/rustdesk/blob/5e9a31340b899822090a3731769ae79c6bf5f3e5/src/ui/common.tis#L263
    if (!type.contains("custom")) {
      closeConnection();
    }
  }

  cancel() {
    dialogManager.dismissAll();
  }

  if (type != "connecting" && type != "success" && !type.contains("nook")) {
    hasOk = true;
    buttons.insert(0, msgBoxButton(translate('OK'), submit));
  }
  hasCancel ??= !type.contains("error") &&
      !type.contains("nocancel") &&
      type != "restarting";
  if (hasCancel) {
    buttons.insert(0, msgBoxButton(translate('Cancel'), cancel));
  }
  // TODO: test this button
  if (type.contains("hasclose")) {
    buttons.insert(
        0,
        msgBoxButton(translate('Close'), () {
          dialogManager.dismissAll();
        }));
  }
  dialogManager.show((setState, close) => CustomAlertDialog(
        title: _msgBoxTitle(title),
        content: Text(translate(text), style: const TextStyle(fontSize: 15)),
        actions: buttons,
        onSubmit: hasOk ? submit : null,
        onCancel: hasCancel == true ? cancel : null,
      ));
}

Widget msgBoxButton(String text, void Function() onPressed) {
  return ButtonTheme(
      padding: EdgeInsets.symmetric(horizontal: 20, vertical: 10),
      materialTapTargetSize: MaterialTapTargetSize.shrinkWrap,
      //limits the touch area to the button area
      minWidth: 0,
      //wraps child's width
      height: 0,
      child: TextButton(
          style: flatButtonStyle,
          onPressed: onPressed,
          child:
              Text(translate(text), style: TextStyle(color: MyTheme.accent))));
}

Widget _msgBoxTitle(String title) =>
    Text(translate(title), style: TextStyle(fontSize: 21));

void msgBoxCommon(OverlayDialogManager dialogManager, String title,
    Widget content, List<Widget> buttons,
    {bool hasCancel = true}) {
  dialogManager.dismissAll();
  dialogManager.show((setState, close) => CustomAlertDialog(
        title: _msgBoxTitle(title),
        content: content,
        actions: buttons,
        onCancel: hasCancel ? close : null,
      ));
}

Color str2color(String str, [alpha = 0xFF]) {
  var hash = 160 << 16 + 114 << 8 + 91;
  for (var i = 0; i < str.length; i += 1) {
    hash = str.codeUnitAt(i) + ((hash << 5) - hash);
  }
  hash = hash % 16777216;
  return Color((hash & 0xFF7FFF) | (alpha << 24));
}

const K = 1024;
const M = K * K;
const G = M * K;

String readableFileSize(double size) {
  if (size < K) {
    return "${size.toStringAsFixed(2)} B";
  } else if (size < M) {
    return "${(size / K).toStringAsFixed(2)} KB";
  } else if (size < G) {
    return "${(size / M).toStringAsFixed(2)} MB";
  } else {
    return "${(size / G).toStringAsFixed(2)} GB";
  }
}

/// Flutter can't not catch PointerMoveEvent when size is 1
/// This will happen in Android AccessibilityService Input
/// android can't init dispatching size yet ,see: https://stackoverflow.com/questions/59960451/android-accessibility-dispatchgesture-is-it-possible-to-specify-pressure-for-a
/// use this temporary solution until flutter or android fixes the bug
class AccessibilityListener extends StatelessWidget {
  final Widget? child;
  static final offset = 100;

  AccessibilityListener({this.child});

  @override
  Widget build(BuildContext context) {
    return Listener(
        onPointerDown: (evt) {
          if (evt.size == 1) {
            GestureBinding.instance.handlePointerEvent(PointerAddedEvent(
                pointer: evt.pointer + offset, position: evt.position));
            GestureBinding.instance.handlePointerEvent(PointerDownEvent(
                pointer: evt.pointer + offset,
                size: 0.1,
                position: evt.position));
          }
        },
        onPointerUp: (evt) {
          if (evt.size == 1) {
            GestureBinding.instance.handlePointerEvent(PointerUpEvent(
                pointer: evt.pointer + offset,
                size: 0.1,
                position: evt.position));
            GestureBinding.instance.handlePointerEvent(PointerRemovedEvent(
                pointer: evt.pointer + offset, position: evt.position));
          }
        },
        onPointerMove: (evt) {
          if (evt.size == 1) {
            GestureBinding.instance.handlePointerEvent(PointerMoveEvent(
                pointer: evt.pointer + offset,
                size: 0.1,
                delta: evt.delta,
                position: evt.position));
          }
        },
        child: child);
  }
}

class PermissionManager {
  static Completer<bool>? _completer;
  static Timer? _timer;
  static var _current = "";

  static final permissions = [
    "audio",
    "file",
    "ignore_battery_optimizations",
    "application_details_settings"
  ];

  static bool isWaitingFile() {
    if (_completer != null) {
      return !_completer!.isCompleted && _current == "file";
    }
    return false;
  }

  static Future<bool> check(String type) {
    if (isDesktop) {
      return Future.value(true);
    }
    if (!permissions.contains(type))
      return Future.error("Wrong permission!$type");
    return gFFI.invokeMethod("check_permission", type);
  }

  static Future<bool> request(String type) {
    if (isDesktop) {
      return Future.value(true);
    }
    if (!permissions.contains(type))
      return Future.error("Wrong permission!$type");

    gFFI.invokeMethod("request_permission", type);
    if (type == "ignore_battery_optimizations") {
      return Future.value(false);
    }
    _current = type;
    _completer = Completer<bool>();
    gFFI.invokeMethod("request_permission", type);

    // timeout
    _timer?.cancel();
    _timer = Timer(Duration(seconds: 60), () {
      if (_completer == null) return;
      if (!_completer!.isCompleted) {
        _completer!.complete(false);
      }
      _completer = null;
      _current = "";
    });
    return _completer!.future;
  }

  static complete(String type, bool res) {
    if (type != _current) {
      res = false;
    }
    _timer?.cancel();
    _completer?.complete(res);
    _current = "";
  }
}

RadioListTile<T> getRadio<T>(
    String name, T toValue, T curValue, void Function(T?) onChange) {
  return RadioListTile<T>(
    controlAffinity: ListTileControlAffinity.trailing,
    title: Text(translate(name)),
    value: toValue,
    groupValue: curValue,
    onChanged: onChange,
    dense: true,
  );
}

CheckboxListTile getToggle(
    String id, void Function(void Function()) setState, option, name,
    {FFI? ffi}) {
  final opt = bind.sessionGetToggleOptionSync(id: id, arg: option);
  return CheckboxListTile(
      value: opt,
      onChanged: (v) {
        setState(() {
          bind.sessionToggleOption(id: id, value: option);
        });
        if (option == "show-quality-monitor") {
          (ffi ?? gFFI).qualityMonitorModel.checkShowQualityMonitor(id);
        }
      },
      dense: true,
      title: Text(translate(name)));
}

/// find ffi, tag is Remote ID
/// for session specific usage
FFI ffi(String? tag) {
  return Get.find<FFI>(tag: tag);
}

/// Global FFI object
late FFI _globalFFI;

FFI get gFFI => _globalFFI;

Future<void> initGlobalFFI() async {
  debugPrint("_globalFFI init");
  _globalFFI = FFI();
  debugPrint("_globalFFI init end");
  // after `put`, can also be globally found by Get.find<FFI>();
  Get.put(_globalFFI, permanent: true);
  // global shared preference
  await Get.putAsync(() => SharedPreferences.getInstance());
}

String translate(String name) {
  if (name.startsWith('Failed to') && name.contains(': ')) {
    return name.split(': ').map((x) => translate(x)).join(': ');
  }
  return platformFFI.translate(name, localeName);
}

bool option2bool(String option, String value) {
  bool res;
  if (option.startsWith("enable-")) {
    res = value != "N";
  } else if (option.startsWith("allow-") ||
      option == "stop-service" ||
      option == "direct-server" ||
      option == "stop-rendezvous-service") {
    res = value == "Y";
  } else {
    assert(false);
    res = value != "N";
  }
  return res;
}

String bool2option(String option, bool b) {
  String res;
  if (option.startsWith('enable-')) {
    res = b ? '' : 'N';
  } else if (option.startsWith('allow-') ||
      option == "stop-service" ||
      option == "direct-server" ||
      option == "stop-rendezvous-service") {
    res = b ? 'Y' : '';
  } else {
    assert(false);
    res = b ? 'Y' : 'N';
  }
  return res;
}

Future<bool> matchPeer(String searchText, Peer peer) async {
  if (searchText.isEmpty) {
    return true;
  }
  if (peer.id.toLowerCase().contains(searchText)) {
    return true;
  }
  if (peer.hostname.toLowerCase().contains(searchText) ||
      peer.username.toLowerCase().contains(searchText)) {
    return true;
  }
  final alias = await bind.mainGetPeerOption(id: peer.id, key: 'alias');
  if (alias.isEmpty) {
    return false;
  }
  return alias.toLowerCase().contains(searchText);
}

Future<List<Peer>>? matchPeers(String searchText, List<Peer> peers) async {
  searchText = searchText.trim();
  if (searchText.isEmpty) {
    return peers;
  }
  searchText = searchText.toLowerCase();
  final matches =
      await Future.wait(peers.map((peer) => matchPeer(searchText, peer)));
  final filteredList = List<Peer>.empty(growable: true);
  for (var i = 0; i < peers.length; i++) {
    if (matches[i]) {
      filteredList.add(peers[i]);
    }
  }
  return filteredList;
}