import 'dart:async';
import 'dart:io';
import 'dart:math';

import 'package:flutter_hbb/desktop/widgets/dragable_divider.dart';
import 'package:percent_indicator/percent_indicator.dart';
import 'package:desktop_drop/desktop_drop.dart';
import 'package:flutter/gestures.dart';
import 'package:flutter/material.dart';
import 'package:flutter/services.dart';
import 'package:flutter_breadcrumb/flutter_breadcrumb.dart';
import 'package:flutter_hbb/desktop/widgets/list_search_action_listener.dart';
import 'package:flutter_hbb/desktop/widgets/menu_button.dart';
import 'package:flutter_hbb/desktop/widgets/tabbar_widget.dart';
import 'package:flutter_hbb/models/file_model.dart';
import 'package:flutter_svg/flutter_svg.dart';
import 'package:get/get.dart';
import 'package:provider/provider.dart';
import 'package:wakelock/wakelock.dart';

import '../../consts.dart';
import '../../desktop/widgets/material_mod_popup_menu.dart' as mod_menu;
import '../../common.dart';
import '../../models/model.dart';
import '../../models/platform_model.dart';
import '../widgets/popup_menu.dart';

/// status of location bar
enum LocationStatus {
  /// normal bread crumb bar
  bread,

  /// show path text field
  pathLocation,

  /// show file search bar text field
  fileSearchBar
}

/// The status of currently focused scope of the mouse
enum MouseFocusScope {
  /// Mouse is in local field.
  local,

  /// Mouse is in remote field.
  remote,

  /// Mouse is not in local field, remote neither.
  none
}

class FileManagerPage extends StatefulWidget {
  const FileManagerPage({Key? key, required this.id, this.forceRelay})
      : super(key: key);
  final String id;
  final bool? forceRelay;

  @override
  State<StatefulWidget> createState() => _FileManagerPageState();
}

class _FileManagerPageState extends State<FileManagerPage>
    with AutomaticKeepAliveClientMixin {
  final _localSelectedItems = SelectedItems();
  final _remoteSelectedItems = SelectedItems();

  final _locationStatusLocal = LocationStatus.bread.obs;
  final _locationStatusRemote = LocationStatus.bread.obs;
  final _locationNodeLocal = FocusNode(debugLabel: "locationNodeLocal");
  final _locationNodeRemote = FocusNode(debugLabel: "locationNodeRemote");
  final _locationBarKeyLocal = GlobalKey(debugLabel: "locationBarKeyLocal");
  final _locationBarKeyRemote = GlobalKey(debugLabel: "locationBarKeyRemote");
  final _searchTextLocal = "".obs;
  final _searchTextRemote = "".obs;
  final _breadCrumbScrollerLocal = ScrollController();
  final _breadCrumbScrollerRemote = ScrollController();
  final _mouseFocusScope = Rx<MouseFocusScope>(MouseFocusScope.none);
  final _keyboardNodeLocal = FocusNode(debugLabel: "keyboardNodeLocal");
  final _keyboardNodeRemote = FocusNode(debugLabel: "keyboardNodeRemote");
  final _listSearchBufferLocal = TimeoutStringBuffer();
  final _listSearchBufferRemote = TimeoutStringBuffer();
  final _nameColWidthLocal = kDesktopFileTransferNameColWidth.obs;
  final _modifiedColWidthLocal = kDesktopFileTransferModifiedColWidth.obs;
  final _nameColWidthRemote = kDesktopFileTransferNameColWidth.obs;
  final _modifiedColWidthRemote = kDesktopFileTransferModifiedColWidth.obs;

  /// [_lastClickTime], [_lastClickEntry] help to handle double click
  int _lastClickTime =
      DateTime.now().millisecondsSinceEpoch - bind.getDoubleClickTime() - 1000;
  Entry? _lastClickEntry;

  final _dropMaskVisible = false.obs; // TODO impl drop mask
  final _overlayKeyState = OverlayKeyState();

  ScrollController getBreadCrumbScrollController(bool isLocal) {
    return isLocal ? _breadCrumbScrollerLocal : _breadCrumbScrollerRemote;
  }

  GlobalKey getLocationBarKey(bool isLocal) {
    return isLocal ? _locationBarKeyLocal : _locationBarKeyRemote;
  }

  late FFI _ffi;

  FileModel get model => _ffi.fileModel;

  SelectedItems getSelectedItems(bool isLocal) {
    return isLocal ? _localSelectedItems : _remoteSelectedItems;
  }

  @override
  void initState() {
    super.initState();
    _ffi = FFI();
    _ffi.start(widget.id, isFileTransfer: true, forceRelay: widget.forceRelay);
    WidgetsBinding.instance.addPostFrameCallback((_) {
      _ffi.dialogManager
          .showLoading(translate('Connecting...'), onCancel: closeConnection);
    });
    Get.put(_ffi, tag: 'ft_${widget.id}');
    if (!Platform.isLinux) {
      Wakelock.enable();
    }
    debugPrint("File manager page init success with id ${widget.id}");
    model.onDirChanged = breadCrumbScrollToEnd;
    // register location listener
    _locationNodeLocal.addListener(onLocalLocationFocusChanged);
    _locationNodeRemote.addListener(onRemoteLocationFocusChanged);
    _ffi.dialogManager.setOverlayState(_overlayKeyState);
  }

  @override
  void dispose() {
    model.onClose().whenComplete(() {
      _ffi.close();
      _ffi.dialogManager.dismissAll();
      if (!Platform.isLinux) {
        Wakelock.disable();
      }
      Get.delete<FFI>(tag: 'ft_${widget.id}');
      _locationNodeLocal.removeListener(onLocalLocationFocusChanged);
      _locationNodeRemote.removeListener(onRemoteLocationFocusChanged);
      _locationNodeLocal.dispose();
      _locationNodeRemote.dispose();
    });
    super.dispose();
  }

  @override
  Widget build(BuildContext context) {
    super.build(context);
    return Overlay(key: _overlayKeyState.key, initialEntries: [
      OverlayEntry(builder: (_) {
        return ChangeNotifierProvider.value(
            value: _ffi.fileModel,
            child: Consumer<FileModel>(builder: (context, model, child) {
              return Scaffold(
                backgroundColor: Theme.of(context).scaffoldBackgroundColor,
                body: Row(
                  children: [
                    Flexible(flex: 3, child: body(isLocal: true)),
                    Flexible(flex: 3, child: body(isLocal: false)),
                    Flexible(flex: 2, child: statusList())
                  ],
                ),
              );
            }));
      })
    ]);
  }

  Widget menu({bool isLocal = false}) {
    var menuPos = RelativeRect.fill;

    final List<MenuEntryBase<String>> items = [
      MenuEntrySwitch<String>(
        switchType: SwitchType.scheckbox,
        text: translate("Show Hidden Files"),
        getter: () async {
          return model.getCurrentShowHidden(isLocal);
        },
        setter: (bool v) async {
          model.toggleShowHidden(local: isLocal);
        },
        padding: kDesktopMenuPadding,
        dismissOnClicked: true,
      ),
      MenuEntryButton(
          childBuilder: (style) => Text(translate("Select All"), style: style),
          proc: () => setState(() => getSelectedItems(isLocal)
              .selectAll(model.getCurrentDir(isLocal).entries)),
          padding: kDesktopMenuPadding,
          dismissOnClicked: true),
      MenuEntryButton(
          childBuilder: (style) =>
              Text(translate("Unselect All"), style: style),
          proc: () => setState(() => getSelectedItems(isLocal).clear()),
          padding: kDesktopMenuPadding,
          dismissOnClicked: true)
    ];

    return Listener(
      onPointerDown: (e) {
        final x = e.position.dx;
        final y = e.position.dy;
        menuPos = RelativeRect.fromLTRB(x, y, x, y);
      },
      child: MenuButton(
        onPressed: () => mod_menu.showMenu(
          context: context,
          position: menuPos,
          items: items
              .map(
                (e) => e.build(
                  context,
                  MenuConfig(
                      commonColor: CustomPopupMenuTheme.commonColor,
                      height: CustomPopupMenuTheme.height,
                      dividerHeight: CustomPopupMenuTheme.dividerHeight),
                ),
              )
              .expand((i) => i)
              .toList(),
          elevation: 8,
        ),
        child: SvgPicture.asset(
          "assets/dots.svg",
          color: Theme.of(context).tabBarTheme.labelColor,
        ),
        color: Theme.of(context).cardColor,
        hoverColor: Theme.of(context).hoverColor,
      ),
    );
  }

  Widget body({bool isLocal = false}) {
    final scrollController = ScrollController();
    return Container(
      margin: const EdgeInsets.all(16.0),
      padding: const EdgeInsets.all(8.0),
      child: DropTarget(
        onDragDone: (detail) => handleDragDone(detail, isLocal),
        onDragEntered: (enter) {
          _dropMaskVisible.value = true;
        },
        onDragExited: (exit) {
          _dropMaskVisible.value = false;
        },
        child: Column(
          crossAxisAlignment: CrossAxisAlignment.start,
          children: [
            headTools(isLocal),
            Expanded(
              child: Row(
                crossAxisAlignment: CrossAxisAlignment.start,
                children: [
                  Expanded(
                    child: _buildFileList(context, isLocal, scrollController),
                  )
                ],
              ),
            ),
          ],
        ),
      ),
    );
  }

  Widget _buildFileList(
      BuildContext context, bool isLocal, ScrollController scrollController) {
    final fd = model.getCurrentDir(isLocal);
    final entries = fd.entries;
    final selectedEntries = getSelectedItems(isLocal);

    return MouseRegion(
      onEnter: (evt) {
        _mouseFocusScope.value =
            isLocal ? MouseFocusScope.local : MouseFocusScope.remote;
        if (isLocal) {
          _keyboardNodeLocal.requestFocus();
        } else {
          _keyboardNodeRemote.requestFocus();
        }
      },
      onExit: (evt) {
        _mouseFocusScope.value = MouseFocusScope.none;
      },
      child: ListSearchActionListener(
        node: isLocal ? _keyboardNodeLocal : _keyboardNodeRemote,
        buffer: isLocal ? _listSearchBufferLocal : _listSearchBufferRemote,
        onNext: (buffer) {
          debugPrint("searching next for $buffer");
          assert(buffer.length == 1);
          assert(selectedEntries.length <= 1);
          var skipCount = 0;
          if (selectedEntries.items.isNotEmpty) {
            final index = entries.indexOf(selectedEntries.items.first);
            if (index < 0) {
              return;
            }
            skipCount = index + 1;
          }
          var searchResult = entries.skip(skipCount).where(
              (element) => element.name.toLowerCase().startsWith(buffer));
          if (searchResult.isEmpty) {
            // cannot find next, lets restart search from head
            debugPrint("restart search from head");
            searchResult = entries.where(
                (element) => element.name.toLowerCase().startsWith(buffer));
          }
          if (searchResult.isEmpty) {
            setState(() {
              getSelectedItems(isLocal).clear();
            });
            return;
          }
          _jumpToEntry(isLocal, searchResult.first, scrollController,
              kDesktopFileTransferRowHeight);
        },
        onSearch: (buffer) {
          debugPrint("searching for $buffer");
          final selectedEntries = getSelectedItems(isLocal);
          final searchResult = entries.where(
              (element) => element.name.toLowerCase().startsWith(buffer));
          selectedEntries.clear();
          if (searchResult.isEmpty) {
            setState(() {
              getSelectedItems(isLocal).clear();
            });
            return;
          }
          _jumpToEntry(isLocal, searchResult.first, scrollController,
              kDesktopFileTransferRowHeight);
        },
        child: ObxValue<RxString>(
          (searchText) {
            final filteredEntries = searchText.isNotEmpty
                ? entries.where((element) {
                    return element.name.contains(searchText.value);
                  }).toList(growable: false)
                : entries;
            final rows = filteredEntries.map((entry) {
              final sizeStr =
                  entry.isFile ? readableFileSize(entry.size.toDouble()) : "";
              final lastModifiedStr = entry.isDrive
                  ? " "
                  : "${entry.lastModified().toString().replaceAll(".000", "")}   ";
              final isSelected = selectedEntries.contains(entry);
              return Padding(
                padding: EdgeInsets.symmetric(vertical: 1),
                child: Container(
                    decoration: BoxDecoration(
                      color: isSelected
                          ? Theme.of(context).hoverColor
                          : Theme.of(context).cardColor,
                      borderRadius: BorderRadius.all(
                        Radius.circular(5.0),
                      ),
                    ),
                    key: ValueKey(entry.name),
                    height: kDesktopFileTransferRowHeight,
                    child: Column(
                      mainAxisAlignment: MainAxisAlignment.spaceAround,
                      children: [
                        Expanded(
                          child: InkWell(
                            child: Row(
                              children: [
                                GestureDetector(
                                  child: Obx(
                                    () => Container(
                                        width: isLocal
                                            ? _nameColWidthLocal.value
                                            : _nameColWidthRemote.value,
                                        child: Tooltip(
                                          waitDuration:
                                              Duration(milliseconds: 500),
                                          message: entry.name,
                                          child: Row(children: [
                                            entry.isDrive
                                                ? Image(
                                                        image: iconHardDrive,
                                                        fit: BoxFit.scaleDown,
                                                        color: Theme.of(context)
                                                            .iconTheme
                                                            .color
                                                            ?.withOpacity(0.7))
                                                    .paddingAll(4)
                                                : SvgPicture.asset(
                                                    entry.isFile
                                                        ? "assets/file.svg"
                                                        : "assets/folder.svg",
                                                    color: Theme.of(context)
                                                        .tabBarTheme
                                                        .labelColor,
                                                  ),
                                            Expanded(
                                                child: Text(
                                                    entry.name.nonBreaking,
                                                    overflow:
                                                        TextOverflow.ellipsis))
                                          ]),
                                        )),
                                  ),
                                  onTap: () {
                                    final items = getSelectedItems(isLocal);
                                    // handle double click
                                    if (_checkDoubleClick(entry)) {
                                      openDirectory(entry.path,
                                          isLocal: isLocal);
                                      items.clear();
                                      return;
                                    }
                                    _onSelectedChanged(
                                        items, filteredEntries, entry, isLocal);
                                  },
                                ),
                                SizedBox(
                                  width: 2.0,
                                ),
                                GestureDetector(
                                  child: Obx(
                                    () => SizedBox(
                                      width: isLocal
                                          ? _modifiedColWidthLocal.value
                                          : _modifiedColWidthRemote.value,
                                      child: Tooltip(
                                          waitDuration:
                                              Duration(milliseconds: 500),
                                          message: lastModifiedStr,
                                          child: Text(
                                            lastModifiedStr,
                                            overflow: TextOverflow.ellipsis,
                                            style: TextStyle(
                                              fontSize: 12,
                                              color: MyTheme.darkGray,
                                            ),
                                          )),
                                    ),
                                  ),
                                ),
                                // Divider from header.
                                SizedBox(
                                  width: 2.0,
                                ),
                                Expanded(
                                  // width: 100,
                                  child: GestureDetector(
                                    child: Tooltip(
                                      waitDuration: Duration(milliseconds: 500),
                                      message: sizeStr,
                                      child: Text(
                                        sizeStr,
                                        overflow: TextOverflow.ellipsis,
                                        style: TextStyle(
                                            fontSize: 10,
                                            color: MyTheme.darkGray),
                                      ),
                                    ),
                                  ),
                                ),
                              ],
                            ),
                          ),
                        ),
                      ],
                    )),
              );
            }).toList(growable: false);

            return Column(
              children: [
                // Header
                Row(
                  children: [
                    Expanded(child: _buildFileBrowserHeader(context, isLocal)),
                  ],
                ),
                // Body
                Expanded(
                  child: ListView.builder(
                    controller: scrollController,
                    itemExtent: kDesktopFileTransferRowHeight,
                    itemBuilder: (context, index) {
                      return rows[index];
                    },
                    itemCount: rows.length,
                  ),
                ),
              ],
            );
          },
          isLocal ? _searchTextLocal : _searchTextRemote,
        ),
      ),
    );
  }

  void _jumpToEntry(bool isLocal, Entry entry,
      ScrollController scrollController, double rowHeight) {
    final entries = model.getCurrentDir(isLocal).entries;
    final index = entries.indexOf(entry);
    if (index == -1) {
      debugPrint("entry is not valid: ${entry.path}");
    }
    final selectedEntries = getSelectedItems(isLocal);
    final searchResult = entries.where((element) => element == entry);
    selectedEntries.clear();
    if (searchResult.isEmpty) {
      return;
    }
    final offset = min(
        max(scrollController.position.minScrollExtent,
            entries.indexOf(searchResult.first) * rowHeight),
        scrollController.position.maxScrollExtent);
    scrollController.jumpTo(offset);
    setState(() {
      selectedEntries.add(isLocal, searchResult.first);
      debugPrint("focused on ${searchResult.first.name}");
    });
  }

  void _onSelectedChanged(SelectedItems selectedItems, List<Entry> entries,
      Entry entry, bool isLocal) {
    final isCtrlDown = RawKeyboard.instance.keysPressed
        .contains(LogicalKeyboardKey.controlLeft);
    final isShiftDown =
        RawKeyboard.instance.keysPressed.contains(LogicalKeyboardKey.shiftLeft);
    if (isCtrlDown) {
      if (selectedItems.contains(entry)) {
        selectedItems.remove(entry);
      } else {
        selectedItems.add(isLocal, entry);
      }
    } else if (isShiftDown) {
      final List<int> indexGroup = [];
      for (var selected in selectedItems.items) {
        indexGroup.add(entries.indexOf(selected));
      }
      indexGroup.add(entries.indexOf(entry));
      indexGroup.removeWhere((e) => e == -1);
      final maxIndex = indexGroup.reduce(max);
      final minIndex = indexGroup.reduce(min);
      selectedItems.clear();
      entries
          .getRange(minIndex, maxIndex + 1)
          .forEach((e) => selectedItems.add(isLocal, e));
    } else {
      selectedItems.clear();
      selectedItems.add(isLocal, entry);
    }
    setState(() {});
  }

  bool _checkDoubleClick(Entry entry) {
    final current = DateTime.now().millisecondsSinceEpoch;
    final elapsed = current - _lastClickTime;
    _lastClickTime = current;
    if (_lastClickEntry == entry) {
      if (elapsed < bind.getDoubleClickTime()) {
        return true;
      }
    } else {
      _lastClickEntry = entry;
    }
    return false;
  }

  Widget generateCard(Widget child) {
    return Container(
      decoration: BoxDecoration(
        color: Theme.of(context).cardColor,
        borderRadius: BorderRadius.all(
          Radius.circular(15.0),
        ),
      ),
      child: child,
    );
  }

  /// transfer status list
  /// watch transfer status
  Widget statusList() {
    return PreferredSize(
      preferredSize: const Size(200, double.infinity),
      child: Container(
        margin: const EdgeInsets.only(top: 16.0, bottom: 16.0, right: 16.0),
        padding: const EdgeInsets.all(8.0),
        child: model.jobTable.isEmpty
            ? generateCard(
                Center(
                  child: Column(
                    mainAxisAlignment: MainAxisAlignment.center,
                    children: [
                      SvgPicture.asset(
                        "assets/transfer.svg",
                        color: Theme.of(context).tabBarTheme.labelColor,
                        height: 40,
                      ).paddingOnly(bottom: 10),
                      Text(
                        translate("No transfers in progress"),
                        textAlign: TextAlign.center,
                        textScaleFactor: 1.20,
                        style: TextStyle(
                            color: Theme.of(context).tabBarTheme.labelColor),
                      ),
                    ],
                  ),
                ),
              )
            : Obx(
                () => ListView.builder(
                  controller: ScrollController(),
                  itemBuilder: (BuildContext context, int index) {
                    final item = model.jobTable[index];
                    return Padding(
                      padding: const EdgeInsets.only(bottom: 5),
                      child: generateCard(
                        Column(
                          mainAxisSize: MainAxisSize.min,
                          children: [
                            Row(
                              crossAxisAlignment: CrossAxisAlignment.center,
                              children: [
                                Transform.rotate(
                                  angle: item.isRemote ? pi : 0,
                                  child: SvgPicture.asset(
                                    "assets/arrow.svg",
                                    color: Theme.of(context)
                                        .tabBarTheme
                                        .labelColor,
                                  ),
                                ).paddingOnly(left: 15),
                                const SizedBox(
                                  width: 16.0,
                                ),
                                Expanded(
                                  child: Column(
                                    mainAxisSize: MainAxisSize.min,
                                    crossAxisAlignment:
                                        CrossAxisAlignment.start,
                                    children: [
                                      Tooltip(
                                        waitDuration:
                                            Duration(milliseconds: 500),
                                        message: item.jobName,
                                        child: Text(
                                          item.fileName,
                                          maxLines: 1,
                                          overflow: TextOverflow.ellipsis,
                                        ).paddingSymmetric(vertical: 10),
                                      ),
                                      Text(
                                        '${translate("Total")} ${readableFileSize(item.totalSize.toDouble())}',
                                        style: TextStyle(
                                          fontSize: 12,
                                          color: MyTheme.darkGray,
                                        ),
                                      ),
                                      Offstage(
                                        offstage:
                                            item.state != JobState.inProgress,
                                        child: Text(
                                          '${translate("Speed")} ${readableFileSize(item.speed)}/s',
                                          style: TextStyle(
                                            fontSize: 12,
                                            color: MyTheme.darkGray,
                                          ),
                                        ),
                                      ),
                                      Offstage(
                                        offstage:
                                            item.state == JobState.inProgress,
                                        child: Text(
                                          translate(
                                            item.display(),
                                          ),
                                          style: TextStyle(
                                            fontSize: 12,
                                            color: MyTheme.darkGray,
                                          ),
                                        ),
                                      ),
                                      Offstage(
                                        offstage:
                                            item.state != JobState.inProgress,
                                        child: LinearPercentIndicator(
                                          padding: EdgeInsets.only(right: 15),
                                          animateFromLastPercent: true,
                                          center: Text(
                                            '${(item.finishedSize / item.totalSize * 100).toStringAsFixed(0)}%',
                                          ),
                                          barRadius: Radius.circular(15),
                                          percent: item.finishedSize /
                                              item.totalSize,
                                          progressColor: MyTheme.accent,
                                          backgroundColor:
                                              Theme.of(context).hoverColor,
                                          lineHeight:
                                              kDesktopFileTransferRowHeight,
                                        ).paddingSymmetric(vertical: 15),
                                      ),
                                    ],
                                  ),
                                ),
                                Row(
                                  mainAxisAlignment: MainAxisAlignment.end,
                                  children: [
                                    Offstage(
                                      offstage: item.state != JobState.paused,
                                      child: MenuButton(
                                        onPressed: () {
                                          model.resumeJob(item.id);
                                        },
                                        child: SvgPicture.asset(
                                          "assets/refresh.svg",
                                          color: Colors.white,
                                        ),
                                        color: MyTheme.accent,
                                        hoverColor: MyTheme.accent80,
                                      ),
                                    ),
                                    MenuButton(
                                      padding: EdgeInsets.only(right: 15),
                                      child: SvgPicture.asset(
                                        "assets/close.svg",
                                        color: Colors.white,
                                      ),
                                      onPressed: () {
                                        model.jobTable.removeAt(index);
                                        model.cancelJob(item.id);
                                      },
                                      color: MyTheme.accent,
                                      hoverColor: MyTheme.accent80,
                                    ),
                                  ],
                                ),
                              ],
                            ),
                          ],
                        ).paddingSymmetric(vertical: 10),
                      ),
                    );
                  },
                  itemCount: model.jobTable.length,
                ),
              ),
      ),
    );
  }

  Widget headTools(bool isLocal) {
    final locationStatus =
        isLocal ? _locationStatusLocal : _locationStatusRemote;
    final locationFocus = isLocal ? _locationNodeLocal : _locationNodeRemote;
    final selectedItems = getSelectedItems(isLocal);
    return Container(
      child: Column(
        children: [
          // symbols
          PreferredSize(
                  child: Row(
                    crossAxisAlignment: CrossAxisAlignment.center,
                    children: [
                      Container(
                          width: 50,
                          height: 50,
                          decoration: BoxDecoration(
                            borderRadius: BorderRadius.all(Radius.circular(8)),
                            color: MyTheme.accent,
                          ),
                          padding: EdgeInsets.all(8.0),
                          child: FutureBuilder<String>(
                              future: bind.sessionGetPlatform(
                                  id: _ffi.id, isRemote: !isLocal),
                              builder: (context, snapshot) {
                                if (snapshot.hasData &&
                                    snapshot.data!.isNotEmpty) {
                                  return getPlatformImage('${snapshot.data}');
                                } else {
                                  return CircularProgressIndicator(
                                    color: Theme.of(context)
                                        .tabBarTheme
                                        .labelColor,
                                  );
                                }
                              })),
                      Text(isLocal
                              ? translate("Local Computer")
                              : translate("Remote Computer"))
                          .marginOnly(left: 8.0)
                    ],
                  ),
                  preferredSize: Size(double.infinity, 70))
              .paddingOnly(bottom: 15),
          // buttons
          Row(
            children: [
              Row(
                children: [
                  MenuButton(
                    padding: EdgeInsets.only(
                      right: 3,
                    ),
                    child: RotatedBox(
                      quarterTurns: 2,
                      child: SvgPicture.asset(
                        "assets/arrow.svg",
                        color: Theme.of(context).tabBarTheme.labelColor,
                      ),
                    ),
                    color: Theme.of(context).cardColor,
                    hoverColor: Theme.of(context).hoverColor,
                    onPressed: () {
                      selectedItems.clear();
                      model.goBack(isLocal: isLocal);
                    },
                  ),
                  MenuButton(
                    child: RotatedBox(
                      quarterTurns: 3,
                      child: SvgPicture.asset(
                        "assets/arrow.svg",
                        color: Theme.of(context).tabBarTheme.labelColor,
                      ),
                    ),
                    color: Theme.of(context).cardColor,
                    hoverColor: Theme.of(context).hoverColor,
                    onPressed: () {
                      selectedItems.clear();
                      model.goToParentDirectory(isLocal: isLocal);
                    },
                  ),
                ],
              ),
              Expanded(
                child: Padding(
                  padding: const EdgeInsets.symmetric(horizontal: 3.0),
                  child: Container(
                    decoration: BoxDecoration(
                      color: Theme.of(context).cardColor,
                      borderRadius: BorderRadius.all(
                        Radius.circular(8.0),
                      ),
                    ),
                    child: Padding(
                      padding: EdgeInsets.symmetric(vertical: 2.5),
                      child: GestureDetector(
                        onTap: () {
                          locationStatus.value =
                              locationStatus.value == LocationStatus.bread
                                  ? LocationStatus.pathLocation
                                  : LocationStatus.bread;
                          Future.delayed(Duration.zero, () {
                            if (locationStatus.value ==
                                LocationStatus.pathLocation) {
                              locationFocus.requestFocus();
                            }
                          });
                        },
                        child: Obx(
                          () => Container(
                            child: Row(
                              children: [
                                Expanded(
                                    child: locationStatus.value ==
                                            LocationStatus.bread
                                        ? buildBread(isLocal)
                                        : buildPathLocation(isLocal)),
                              ],
                            ),
                          ),
                        ),
                      ),
                    ),
                  ),
                ),
              ),
              Obx(() {
                switch (locationStatus.value) {
                  case LocationStatus.bread:
                    return MenuButton(
                      onPressed: () {
                        locationStatus.value = LocationStatus.fileSearchBar;
                        final focusNode =
                            isLocal ? _locationNodeLocal : _locationNodeRemote;
                        Future.delayed(
                            Duration.zero, () => focusNode.requestFocus());
                      },
                      child: SvgPicture.asset(
                        "assets/search.svg",
                        color: Theme.of(context).tabBarTheme.labelColor,
                      ),
                      color: Theme.of(context).cardColor,
                      hoverColor: Theme.of(context).hoverColor,
                    );
                  case LocationStatus.pathLocation:
                    return MenuButton(
                      onPressed: null,
                      child: SvgPicture.asset(
                        "assets/close.svg",
                        color: Theme.of(context).tabBarTheme.labelColor,
                      ),
                      color: Theme.of(context).disabledColor,
                      hoverColor: Theme.of(context).hoverColor,
                    );
                  case LocationStatus.fileSearchBar:
                    return MenuButton(
                      onPressed: () {
                        onSearchText("", isLocal);
                        locationStatus.value = LocationStatus.bread;
                      },
                      child: SvgPicture.asset(
                        "assets/close.svg",
                        color: Theme.of(context).tabBarTheme.labelColor,
                      ),
                      color: Theme.of(context).cardColor,
                      hoverColor: Theme.of(context).hoverColor,
                    );
                }
              }),
              MenuButton(
                padding: EdgeInsets.only(
                  left: 3,
                ),
                onPressed: () {
                  model.refresh(isLocal: isLocal);
                },
                child: SvgPicture.asset(
                  "assets/refresh.svg",
                  color: Theme.of(context).tabBarTheme.labelColor,
                ),
                color: Theme.of(context).cardColor,
                hoverColor: Theme.of(context).hoverColor,
              ),
            ],
          ),
          Row(
            textDirection: isLocal ? TextDirection.ltr : TextDirection.rtl,
            children: [
              Expanded(
                child: Row(
                  mainAxisAlignment:
                      isLocal ? MainAxisAlignment.start : MainAxisAlignment.end,
                  children: [
                    MenuButton(
                      padding: EdgeInsets.only(
                        right: 3,
                      ),
                      onPressed: () {
                        model.goHome(isLocal: isLocal);
                      },
                      child: SvgPicture.asset(
                        "assets/home.svg",
                        color: Theme.of(context).tabBarTheme.labelColor,
                      ),
                      color: Theme.of(context).cardColor,
                      hoverColor: Theme.of(context).hoverColor,
                    ),
                    MenuButton(
                      onPressed: () {
                        final name = TextEditingController();
                        _ffi.dialogManager.show((setState, close) {
                          submit() {
                            if (name.value.text.isNotEmpty) {
                              model.createDir(
                                  PathUtil.join(
                                      model.getCurrentDir(isLocal).path,
                                      name.value.text,
                                      model.getCurrentIsWindows(isLocal)),
                                  isLocal: isLocal);
                              close();
                            }
                          }

                          cancel() => close(false);
                          return CustomAlertDialog(
                            title: Row(
                              mainAxisAlignment: MainAxisAlignment.center,
                              children: [
                                SvgPicture.asset("assets/folder_new.svg",
                                    color: MyTheme.accent),
                                Text(
                                  translate("Create Folder"),
                                ).paddingOnly(
                                  left: 10,
                                ),
                              ],
                            ),
                            content: Column(
                              mainAxisSize: MainAxisSize.min,
                              children: [
                                TextFormField(
                                  decoration: InputDecoration(
                                    labelText: translate(
                                      "Please enter the folder name",
                                    ),
                                  ),
                                  controller: name,
                                  autofocus: true,
                                ),
                              ],
                            ),
                            actions: [
                              dialogButton(
                                "Cancel",
                                icon: Icon(Icons.close_rounded),
                                onPressed: cancel,
                                isOutline: true,
                              ),
                              dialogButton(
                                "Ok",
                                icon: Icon(Icons.done_rounded),
                                onPressed: submit,
                              ),
                            ],
                            onSubmit: submit,
                            onCancel: cancel,
                          );
                        });
                      },
                      child: SvgPicture.asset(
                        "assets/folder_new.svg",
                        color: Theme.of(context).tabBarTheme.labelColor,
                      ),
                      color: Theme.of(context).cardColor,
                      hoverColor: Theme.of(context).hoverColor,
                    ),
                    MenuButton(
                      onPressed: validItems(selectedItems)
                          ? () async {
                              await (model.removeAction(selectedItems,
                                  isLocal: isLocal));
                              selectedItems.clear();
                            }
                          : null,
                      child: SvgPicture.asset(
                        "assets/trash.svg",
                        color: Theme.of(context).tabBarTheme.labelColor,
                      ),
                      color: Theme.of(context).cardColor,
                      hoverColor: Theme.of(context).hoverColor,
                    ),
                    menu(isLocal: isLocal),
                  ],
                ),
              ),
              ElevatedButton.icon(
                style: ButtonStyle(
                  padding: MaterialStateProperty.all<EdgeInsetsGeometry>(isLocal
                      ? EdgeInsets.only(left: 10)
                      : EdgeInsets.only(right: 10)),
                  backgroundColor: MaterialStateProperty.all(
                    selectedItems.length == 0
                        ? MyTheme.accent80
                        : MyTheme.accent,
                  ),
                ),
                onPressed: validItems(selectedItems)
                    ? () {
                        model.sendFiles(selectedItems, isRemote: !isLocal);
                        selectedItems.clear();
                      }
                    : null,
                icon: isLocal
                    ? Text(
                        translate('Send'),
                        textAlign: TextAlign.right,
                        style: TextStyle(
                          color: selectedItems.length == 0
                              ? Theme.of(context).brightness == Brightness.light
                                  ? MyTheme.grayBg
                                  : MyTheme.darkGray
                              : Colors.white,
                        ),
                      )
                    : RotatedBox(
                        quarterTurns: 2,
                        child: SvgPicture.asset(
                          "assets/arrow.svg",
                          color: selectedItems.length == 0
                              ? Theme.of(context).brightness == Brightness.light
                                  ? MyTheme.grayBg
                                  : MyTheme.darkGray
                              : Colors.white,
                          alignment: Alignment.bottomRight,
                        ),
                      ),
                label: isLocal
                    ? SvgPicture.asset(
                        "assets/arrow.svg",
                        color: selectedItems.length == 0
                            ? Theme.of(context).brightness == Brightness.light
                                ? MyTheme.grayBg
                                : MyTheme.darkGray
                            : Colors.white,
                      )
                    : Text(
                        translate('Receive'),
                        style: TextStyle(
                          color: selectedItems.length == 0
                              ? Theme.of(context).brightness == Brightness.light
                                  ? MyTheme.grayBg
                                  : MyTheme.darkGray
                              : Colors.white,
                        ),
                      ),
              ),
            ],
          ).marginOnly(top: 8.0)
        ],
      ),
    );
  }

  bool validItems(SelectedItems items) {
    if (items.length > 0) {
      // exclude DirDrive type
      return items.items.any((item) => !item.isDrive);
    }
    return false;
  }

  @override
  bool get wantKeepAlive => true;

  void onLocalLocationFocusChanged() {
    debugPrint("focus changed on local");
    if (_locationNodeLocal.hasFocus) {
      // ignore
    } else {
      // lost focus, change to bread
      if (_locationStatusLocal.value != LocationStatus.fileSearchBar) {
        _locationStatusLocal.value = LocationStatus.bread;
      }
    }
  }

  void onRemoteLocationFocusChanged() {
    debugPrint("focus changed on remote");
    if (_locationNodeRemote.hasFocus) {
      // ignore
    } else {
      // lost focus, change to bread
      if (_locationStatusRemote.value != LocationStatus.fileSearchBar) {
        _locationStatusRemote.value = LocationStatus.bread;
      }
    }
  }

  Widget buildBread(bool isLocal) {
    final items = getPathBreadCrumbItems(isLocal, (list) {
      var path = "";
      for (var item in list) {
        path = PathUtil.join(path, item, model.getCurrentIsWindows(isLocal));
      }
      openDirectory(path, isLocal: isLocal);
    });
    final locationBarKey = getLocationBarKey(isLocal);

    return items.isEmpty
        ? Offstage()
        : Row(
            key: locationBarKey,
            mainAxisAlignment: MainAxisAlignment.spaceBetween,
            children: [
                Expanded(
                  child: Listener(
                    // handle mouse wheel
                    onPointerSignal: (e) {
                      if (e is PointerScrollEvent) {
                        final sc = getBreadCrumbScrollController(isLocal);
                        final scale = Platform.isWindows ? 2 : 4;
                        sc.jumpTo(sc.offset + e.scrollDelta.dy / scale);
                      }
                    },
                    child: BreadCrumb(
                      items: items,
                      divider: const Icon(Icons.keyboard_arrow_right_rounded),
                      overflow: ScrollableOverflow(
                        controller: getBreadCrumbScrollController(isLocal),
                      ),
                    ),
                  ),
                ),
                ActionIcon(
                  message: "",
                  icon: Icons.keyboard_arrow_down_rounded,
                  onTap: () async {
                    final renderBox = locationBarKey.currentContext
                        ?.findRenderObject() as RenderBox;
                    locationBarKey.currentContext?.size;

                    final size = renderBox.size;
                    final offset = renderBox.localToGlobal(Offset.zero);

                    final x = offset.dx;
                    final y = offset.dy + size.height + 1;

                    final isPeerWindows = model.getCurrentIsWindows(isLocal);
                    final List<MenuEntryBase> menuItems = [
                      MenuEntryButton(
                          childBuilder: (TextStyle? style) => isPeerWindows
                              ? buildWindowsThisPC(style)
                              : Text(
                                  '/',
                                  style: style,
                                ),
                          proc: () {
                            openDirectory('/', isLocal: isLocal);
                          },
                          dismissOnClicked: true),
                      MenuEntryDivider()
                    ];
                    if (isPeerWindows) {
                      var loadingTag = "";
                      if (!isLocal) {
                        loadingTag = _ffi.dialogManager.showLoading("Waiting");
                      }
                      try {
                        final fd =
                            await model.fetchDirectory("/", isLocal, isLocal);
                        for (var entry in fd.entries) {
                          menuItems.add(MenuEntryButton(
                              childBuilder: (TextStyle? style) =>
                                  Row(children: [
                                    Image(
                                        image: iconHardDrive,
                                        fit: BoxFit.scaleDown,
                                        color: Theme.of(context)
                                            .iconTheme
                                            .color
                                            ?.withOpacity(0.7)),
                                    SizedBox(width: 10),
                                    Text(
                                      entry.name,
                                      style: style,
                                    )
                                  ]),
                              proc: () {
                                openDirectory('${entry.name}\\',
                                    isLocal: isLocal);
                              },
                              dismissOnClicked: true));
                        }
                      } catch (e) {
                        debugPrint("buildBread fetchDirectory err=$e");
                      } finally {
                        if (!isLocal) {
                          _ffi.dialogManager.dismissByTag(loadingTag);
                        }
                      }
                    }
                    menuItems.add(MenuEntryDivider());
                    mod_menu.showMenu(
                        context: context,
                        position: RelativeRect.fromLTRB(x, y, x, y),
                        elevation: 4,
                        items: menuItems
                            .map((e) => e.build(
                                context,
                                MenuConfig(
                                    commonColor:
                                        CustomPopupMenuTheme.commonColor,
                                    height: CustomPopupMenuTheme.height,
                                    dividerHeight:
                                        CustomPopupMenuTheme.dividerHeight,
                                    boxWidth: size.width)))
                            .expand((i) => i)
                            .toList());
                  },
                  iconSize: 20,
                )
              ]);
  }

  Widget buildWindowsThisPC([TextStyle? textStyle]) {
    final color = Theme.of(context).iconTheme.color?.withOpacity(0.7);
    return Row(children: [
      Icon(Icons.computer, size: 20, color: color),
      SizedBox(width: 10),
      Text(translate('This PC'), style: textStyle)
    ]);
  }

  List<BreadCrumbItem> getPathBreadCrumbItems(
      bool isLocal, void Function(List<String>) onPressed) {
    final path = model.getCurrentDir(isLocal).path;
    final breadCrumbList = List<BreadCrumbItem>.empty(growable: true);
    final isWindows = model.getCurrentIsWindows(isLocal);
    if (isWindows && path == '/') {
      breadCrumbList.add(BreadCrumbItem(
          content: TextButton(
                  child: buildWindowsThisPC(),
                  style: ButtonStyle(
                      minimumSize: MaterialStateProperty.all(Size(0, 0))),
                  onPressed: () => onPressed(['/']))
              .marginSymmetric(horizontal: 4)));
    } else {
      final list = PathUtil.split(path, isWindows);
      breadCrumbList.addAll(
        list.asMap().entries.map(
              (e) => BreadCrumbItem(
                content: TextButton(
                  child: Text(e.value),
                  style: ButtonStyle(
                    minimumSize: MaterialStateProperty.all(
                      Size(0, 0),
                    ),
                  ),
                  onPressed: () => onPressed(
                    list.sublist(0, e.key + 1),
                  ),
                ).marginSymmetric(horizontal: 4),
              ),
            ),
      );
    }
    return breadCrumbList;
  }

  breadCrumbScrollToEnd(bool isLocal) {
    Future.delayed(Duration(milliseconds: 200), () {
      final breadCrumbScroller = getBreadCrumbScrollController(isLocal);
      if (breadCrumbScroller.hasClients) {
        breadCrumbScroller.animateTo(
            breadCrumbScroller.position.maxScrollExtent,
            duration: Duration(milliseconds: 200),
            curve: Curves.fastLinearToSlowEaseIn);
      }
    });
  }

  Widget buildPathLocation(bool isLocal) {
    final searchTextObs = isLocal ? _searchTextLocal : _searchTextRemote;
    final locationStatus =
        isLocal ? _locationStatusLocal : _locationStatusRemote;
    final focusNode = isLocal ? _locationNodeLocal : _locationNodeRemote;
    final text = locationStatus.value == LocationStatus.pathLocation
        ? model.getCurrentDir(isLocal).path
        : searchTextObs.value;
    final textController = TextEditingController(text: text)
      ..selection = TextSelection.collapsed(offset: text.length);
    return Row(
      children: [
        SvgPicture.asset(
          locationStatus.value == LocationStatus.pathLocation
              ? "assets/folder.svg"
              : "assets/search.svg",
          color: Theme.of(context).tabBarTheme.labelColor,
        ),
        Expanded(
          child: TextField(
            focusNode: focusNode,
            decoration: InputDecoration(
              border: InputBorder.none,
              isDense: true,
              prefix: Padding(
                padding: EdgeInsets.only(left: 4.0),
              ),
            ),
            controller: textController,
            onSubmitted: (path) {
              openDirectory(path, isLocal: isLocal);
            },
            onChanged: locationStatus.value == LocationStatus.fileSearchBar
                ? (searchText) => onSearchText(searchText, isLocal)
                : null,
          ),
        )
      ],
    );
  }

  onSearchText(String searchText, bool isLocal) {
    if (isLocal) {
      _localSelectedItems.clear();
      _searchTextLocal.value = searchText;
    } else {
      _remoteSelectedItems.clear();
      _searchTextRemote.value = searchText;
    }
  }

  openDirectory(String path, {bool isLocal = false}) {
    model.openDirectory(path, isLocal: isLocal);
  }

  void handleDragDone(DropDoneDetails details, bool isLocal) {
    if (isLocal) {
      // ignore local
      return;
    }
    var items = SelectedItems();
    for (var file in details.files) {
      final f = File(file.path);
      items.add(
          true,
          Entry()
            ..path = file.path
            ..name = file.name
            ..size =
                FileSystemEntity.isDirectorySync(f.path) ? 0 : f.lengthSync());
    }
    model.sendFiles(items, isRemote: false);
  }

  void refocusKeyboardListener(bool isLocal) {
    Future.delayed(Duration.zero, () {
      if (isLocal) {
        _keyboardNodeLocal.requestFocus();
      } else {
        _keyboardNodeRemote.requestFocus();
      }
    });
  }

  Widget headerItemFunc(
      double? width, SortBy sortBy, String name, bool isLocal) {
    final headerTextStyle =
        Theme.of(context).dataTableTheme.headingTextStyle ?? TextStyle();
    return ObxValue<Rx<bool?>>(
        (ascending) => InkWell(
              onTap: () {
                if (ascending.value == null) {
                  ascending.value = true;
                } else {
                  ascending.value = !ascending.value!;
                }
                model.changeSortStyle(sortBy,
                    isLocal: isLocal, ascending: ascending.value!);
              },
              child: SizedBox(
                width: width,
                height: kDesktopFileTransferHeaderHeight,
                child: Row(
                  children: [
                    Flexible(
                      flex: 2,
                      child: Text(
                        name,
                        style: headerTextStyle,
                        overflow: TextOverflow.ellipsis,
                      ).marginSymmetric(horizontal: 4),
                    ),
                    Flexible(
                        flex: 1,
                        child: ascending.value != null
                            ? Icon(
                                ascending.value!
                                    ? Icons.keyboard_arrow_up_rounded
                                    : Icons.keyboard_arrow_down_rounded,
                              )
                            : const Offstage())
                  ],
                ),
              ),
            ), () {
      if (model.getSortStyle(isLocal) == sortBy) {
        return model.getSortAscending(isLocal).obs;
      } else {
        return Rx<bool?>(null);
      }
    }());
  }

  Widget _buildFileBrowserHeader(BuildContext context, bool isLocal) {
    final nameColWidth = isLocal ? _nameColWidthLocal : _nameColWidthRemote;
    final modifiedColWidth =
        isLocal ? _modifiedColWidthLocal : _modifiedColWidthRemote;
    final padding = EdgeInsets.all(1.0);
    return SizedBox(
      height: kDesktopFileTransferHeaderHeight,
      child: Row(
        children: [
          Obx(
            () => headerItemFunc(
                nameColWidth.value, SortBy.name, translate("Name"), isLocal),
          ),
          DraggableDivider(
            axis: Axis.vertical,
            onPointerMove: (dx) {
              nameColWidth.value += dx;
              nameColWidth.value = min(kDesktopFileTransferMaximumWidth,
                  max(kDesktopFileTransferMinimumWidth, nameColWidth.value));
            },
            padding: padding,
          ),
          Obx(
            () => headerItemFunc(modifiedColWidth.value, SortBy.modified,
                translate("Modified"), isLocal),
          ),
          DraggableDivider(
              axis: Axis.vertical,
              onPointerMove: (dx) {
                modifiedColWidth.value += dx;
                modifiedColWidth.value = min(
                    kDesktopFileTransferMaximumWidth,
                    max(kDesktopFileTransferMinimumWidth,
                        modifiedColWidth.value));
              },
              padding: padding),
          Expanded(
              child:
                  headerItemFunc(null, SortBy.size, translate("Size"), isLocal))
        ],
      ),
    );
  }
}
