// original cm window in Sciter version.

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

import 'package:flutter/material.dart';
import 'package:flutter_hbb/consts.dart';
import 'package:flutter_hbb/desktop/widgets/tabbar_widget.dart';
import 'package:flutter_hbb/models/chat_model.dart';
import 'package:flutter_hbb/utils/platform_channel.dart';
import 'package:get/get.dart';
import 'package:provider/provider.dart';
import 'package:window_manager/window_manager.dart';
import 'package:flutter_svg/flutter_svg.dart';

import '../../common.dart';
import '../../common/widgets/chat_page.dart';
import '../../models/platform_model.dart';
import '../../models/server_model.dart';

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

  @override
  State<DesktopServerPage> createState() => _DesktopServerPageState();
}

class _DesktopServerPageState extends State<DesktopServerPage>
    with WindowListener, AutomaticKeepAliveClientMixin {
  final tabController = gFFI.serverModel.tabController;
  @override
  void initState() {
    gFFI.ffiModel.updateEventListener(gFFI.sessionId, "");
    windowManager.addListener(this);
    tabController.onRemoved = (_, id) {
      onRemoveId(id);
    };
    super.initState();
  }

  @override
  void dispose() {
    windowManager.removeListener(this);
    super.dispose();
  }

  @override
  void onWindowClose() {
    Future.wait([gFFI.serverModel.closeAll(), gFFI.close()]).then((_) {
      if (Platform.isMacOS) {
        RdPlatformChannel.instance.terminate();
      } else {
        windowManager.setPreventClose(false);
        windowManager.close();
      }
    });
    super.onWindowClose();
  }

  void onRemoveId(String id) {
    if (tabController.state.value.tabs.isEmpty) {
      windowManager.close();
    }
  }

  @override
  Widget build(BuildContext context) {
    super.build(context);
    return MultiProvider(
      providers: [
        ChangeNotifierProvider.value(value: gFFI.serverModel),
        ChangeNotifierProvider.value(value: gFFI.chatModel),
      ],
      child: Consumer<ServerModel>(
        builder: (context, serverModel, child) => Container(
          decoration: BoxDecoration(
              border: Border.all(color: MyTheme.color(context).border!)),
          child: Scaffold(
            backgroundColor: Theme.of(context).scaffoldBackgroundColor,
            body: ConnectionManager(),
          ),
        ),
      ),
    );
  }

  @override
  bool get wantKeepAlive => true;
}

class ConnectionManager extends StatefulWidget {
  @override
  State<StatefulWidget> createState() => ConnectionManagerState();
}

class ConnectionManagerState extends State<ConnectionManager> {
  @override
  void initState() {
    gFFI.serverModel.updateClientState();
    gFFI.serverModel.tabController.onSelected = (client_id_str) {
      final client_id = int.tryParse(client_id_str);
      if (client_id != null) {
        final client =
            gFFI.serverModel.clients.firstWhereOrNull((e) => e.id == client_id);
        if (client != null) {
          gFFI.chatModel.changeCurrentKey(MessageKey(client.peerId, client.id));
          if (client.unreadChatMessageCount.value > 0) {
            Future.delayed(Duration.zero, () {
              client.unreadChatMessageCount.value = 0;
              gFFI.chatModel.showChatPage(MessageKey(client.peerId, client.id));
            });
          }
          windowManager.setTitle(getWindowNameWithId(client.peerId));
        }
      }
    };
    gFFI.chatModel.isConnManager = true;
    super.initState();
  }

  @override
  Widget build(BuildContext context) {
    final serverModel = Provider.of<ServerModel>(context);
    pointerHandler(PointerEvent e) {
      if (serverModel.cmHiddenTimer != null) {
        serverModel.cmHiddenTimer!.cancel();
        serverModel.cmHiddenTimer = null;
        debugPrint("CM hidden timer has been canceled");
      }
    }

    return serverModel.clients.isEmpty
        ? Column(
            children: [
              buildTitleBar(),
              Expanded(
                child: Center(
                  child: Text(translate("Waiting")),
                ),
              ),
            ],
          )
        : Listener(
            onPointerDown: pointerHandler,
            onPointerMove: pointerHandler,
            child: DesktopTab(
              showTitle: false,
              showMaximize: false,
              showMinimize: true,
              showClose: true,
              onWindowCloseButton: handleWindowCloseButton,
              controller: serverModel.tabController,
              selectedBorderColor: MyTheme.accent,
              maxLabelWidth: 100,
              tail: buildScrollJumper(),
              selectedTabBackgroundColor:
                  Theme.of(context).hintColor.withOpacity(0),
              tabBuilder: (key, icon, label, themeConf) {
                final client = serverModel.clients
                    .firstWhereOrNull((client) => client.id.toString() == key);
                return Row(
                  mainAxisAlignment: MainAxisAlignment.center,
                  children: [
                    Tooltip(
                        message: key,
                        waitDuration: Duration(seconds: 1),
                        child: label),
                    unreadMessageCountBuilder(client?.unreadChatMessageCount)
                        .marginOnly(left: 4),
                  ],
                );
              },
              pageViewBuilder: (pageView) => Row(
                children: [
                  Consumer<ChatModel>(
                    builder: (_, model, child) => model.isShowCMChatPage
                        ? Expanded(
                            child: buildRemoteBlock(
                              child: Container(
                                  decoration: BoxDecoration(
                                      border: Border(
                                          right: BorderSide(
                                              color: Theme.of(context)
                                                  .dividerColor))),
                                  child:
                                      ChatPage(type: ChatPageType.desktopCM)),
                            ),
                            flex: (kConnectionManagerWindowSizeOpenChat.width -
                                    kConnectionManagerWindowSizeClosedChat
                                        .width)
                                .toInt(),
                          )
                        : Offstage(),
                  ),
                  Expanded(
                      child: pageView,
                      flex: kConnectionManagerWindowSizeClosedChat.width
                              .toInt() -
                          4 // prevent stretch of the page view when chat is open,
                      ),
                ],
              ),
            ),
          );
  }

  Widget buildTitleBar() {
    return SizedBox(
      height: kDesktopRemoteTabBarHeight,
      child: Row(
        crossAxisAlignment: CrossAxisAlignment.center,
        children: [
          const _AppIcon(),
          Expanded(
            child: GestureDetector(
              onPanStart: (d) {
                windowManager.startDragging();
              },
              child: Container(
                color: Theme.of(context).colorScheme.background,
              ),
            ),
          ),
          const SizedBox(
            width: 4.0,
          ),
          const _CloseButton()
        ],
      ),
    );
  }

  Widget buildScrollJumper() {
    final offstage = gFFI.serverModel.clients.length < 2;
    final sc = gFFI.serverModel.tabController.state.value.scrollController;
    return Offstage(
        offstage: offstage,
        child: Row(
          children: [
            ActionIcon(
                icon: Icons.arrow_left, iconSize: 22, onTap: sc.backward),
            ActionIcon(
                icon: Icons.arrow_right, iconSize: 22, onTap: sc.forward),
          ],
        ));
  }

  Future<bool> handleWindowCloseButton() async {
    var tabController = gFFI.serverModel.tabController;
    final connLength = tabController.length;
    if (connLength <= 1) {
      windowManager.close();
      return true;
    } else {
      final opt = "enable-confirm-closing-tabs";
      final bool res;
      if (!option2bool(opt, await bind.mainGetOption(key: opt))) {
        res = true;
      } else {
        res = await closeConfirmDialog();
      }
      if (res) {
        windowManager.close();
      }
      return res;
    }
  }
}

Widget buildConnectionCard(Client client) {
  return Consumer<ServerModel>(
    builder: (context, value, child) => Column(
      mainAxisAlignment: MainAxisAlignment.start,
      crossAxisAlignment: CrossAxisAlignment.start,
      key: ValueKey(client.id),
      children: [
        _CmHeader(client: client),
        client.type_() != ClientType.remote || client.disconnected
            ? Offstage()
            : _PrivilegeBoard(client: client),
        Expanded(
          child: Align(
            alignment: Alignment.bottomCenter,
            child: _CmControlPanel(client: client),
          ),
        )
      ],
    ).paddingSymmetric(vertical: 4.0, horizontal: 8.0),
  );
}

class _AppIcon extends StatelessWidget {
  const _AppIcon({Key? key}) : super(key: key);

  @override
  Widget build(BuildContext context) {
    return Container(
      margin: EdgeInsets.symmetric(horizontal: 4.0),
      child: SvgPicture.asset(
        'assets/logo.svg',
        width: 30,
        height: 30,
      ),
    );
  }
}

class _CloseButton extends StatelessWidget {
  const _CloseButton({Key? key}) : super(key: key);

  @override
  Widget build(BuildContext context) {
    return IconButton(
      onPressed: () {
        windowManager.close();
      },
      icon: const Icon(
        IconFont.close,
        size: 18,
      ),
      splashColor: Colors.transparent,
      hoverColor: Colors.transparent,
    );
  }
}

class _CmHeader extends StatefulWidget {
  final Client client;

  const _CmHeader({Key? key, required this.client}) : super(key: key);

  @override
  State<_CmHeader> createState() => _CmHeaderState();
}

class _CmHeaderState extends State<_CmHeader>
    with AutomaticKeepAliveClientMixin {
  Client get client => widget.client;

  final _time = 0.obs;
  Timer? _timer;

  @override
  void initState() {
    super.initState();
    _timer = Timer.periodic(Duration(seconds: 1), (_) {
      if (client.authorized && !client.disconnected) {
        _time.value = _time.value + 1;
      }
    });
    gFFI.serverModel.tabController.onSelected?.call(client.id.toString());
  }

  @override
  void dispose() {
    _timer?.cancel();
    super.dispose();
  }

  @override
  Widget build(BuildContext context) {
    super.build(context);
    return Container(
      decoration: BoxDecoration(
        borderRadius: BorderRadius.circular(10.0),
        gradient: LinearGradient(
          begin: Alignment.topRight,
          end: Alignment.bottomLeft,
          colors: [
            Color(0xff00bfe1),
            Color(0xff0071ff),
          ],
        ),
      ),
      margin: EdgeInsets.symmetric(horizontal: 5.0, vertical: 10.0),
      padding: EdgeInsets.only(
        top: 10.0,
        bottom: 10.0,
        left: 10.0,
        right: 5.0,
      ),
      child: Row(
        crossAxisAlignment: CrossAxisAlignment.start,
        children: [
          Container(
            width: 70,
            height: 70,
            alignment: Alignment.center,
            decoration: BoxDecoration(
              color: str2color(client.name),
              borderRadius: BorderRadius.circular(15.0),
            ),
            child: Text(
              client.name[0],
              style: TextStyle(
                fontWeight: FontWeight.bold,
                color: Colors.white,
                fontSize: 55,
              ),
            ),
          ).marginOnly(right: 10.0),
          Expanded(
            child: Column(
              mainAxisAlignment: MainAxisAlignment.start,
              crossAxisAlignment: CrossAxisAlignment.start,
              children: [
                FittedBox(
                    child: Text(
                  client.name,
                  style: TextStyle(
                    color: Colors.white,
                    fontWeight: FontWeight.bold,
                    fontSize: 20,
                    overflow: TextOverflow.ellipsis,
                  ),
                  maxLines: 1,
                )),
                FittedBox(
                  child: Text(
                    "(${client.peerId})",
                    style: TextStyle(color: Colors.white, fontSize: 14),
                  ),
                ).marginOnly(bottom: 10.0),
                FittedBox(
                    child: Row(
                  children: [
                    Text(
                      client.authorized
                          ? client.disconnected
                              ? translate("Disconnected")
                              : translate("Connected")
                          : "${translate("Request access to your device")}...",
                      style: TextStyle(color: Colors.white),
                    ).marginOnly(right: 8.0),
                    if (client.authorized)
                      Obx(
                        () => Text(
                          formatDurationToTime(
                            Duration(seconds: _time.value),
                          ),
                          style: TextStyle(color: Colors.white),
                        ),
                      )
                  ],
                ))
              ],
            ),
          ),
          Offstage(
            offstage: !client.authorized || client.type_() != ClientType.remote,
            child: IconButton(
              onPressed: () => checkClickTime(
                client.id,
                () => gFFI.chatModel
                    .toggleCMChatPage(MessageKey(client.peerId, client.id)),
              ),
              icon: SvgPicture.asset('assets/chat2.svg'),
              splashRadius: kDesktopIconButtonSplashRadius,
            ),
          )
        ],
      ),
    );
  }

  @override
  bool get wantKeepAlive => true;
}

class _PrivilegeBoard extends StatefulWidget {
  final Client client;

  const _PrivilegeBoard({Key? key, required this.client}) : super(key: key);

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

class _PrivilegeBoardState extends State<_PrivilegeBoard> {
  late final client = widget.client;
  Widget buildPermissionIcon(bool enabled, IconData iconData,
      Function(bool)? onTap, String tooltipText) {
    return Tooltip(
      message: "$tooltipText: ${enabled ? "ON" : "OFF"}",
      child: Container(
        decoration: BoxDecoration(
          color: enabled ? MyTheme.accent : Colors.grey[700],
          borderRadius: BorderRadius.circular(10.0),
        ),
        padding: EdgeInsets.all(8.0),
        child: InkWell(
          onTap: () =>
              checkClickTime(widget.client.id, () => onTap?.call(!enabled)),
          child: Column(
            mainAxisAlignment: MainAxisAlignment.spaceAround,
            children: [
              Expanded(
                child: Icon(
                  iconData,
                  color: Colors.white,
                  size: 32,
                ),
              ),
            ],
          ),
        ),
      ),
    );
  }

  @override
  Widget build(BuildContext context) {
    return Container(
      width: double.infinity,
      height: 200.0,
      margin: EdgeInsets.all(5.0),
      padding: EdgeInsets.all(5.0),
      decoration: BoxDecoration(
        borderRadius: BorderRadius.circular(10.0),
        color: Theme.of(context).colorScheme.background,
        boxShadow: [
          BoxShadow(
            color: Colors.black.withOpacity(0.2),
            spreadRadius: 1,
            blurRadius: 1,
            offset: Offset(0, 1.5),
          ),
        ],
      ),
      child: Column(
        crossAxisAlignment: CrossAxisAlignment.center,
        children: [
          Text(
            translate("Permissions"),
            style: TextStyle(fontSize: 16, fontWeight: FontWeight.bold),
            textAlign: TextAlign.center,
          ).marginOnly(left: 4.0, bottom: 8.0),
          Expanded(
            child: GridView.count(
              crossAxisCount: 3,
              padding: EdgeInsets.symmetric(horizontal: 20.0),
              mainAxisSpacing: 20.0,
              crossAxisSpacing: 20.0,
              children: [
                buildPermissionIcon(
                  client.keyboard,
                  Icons.keyboard,
                  (enabled) {
                    bind.cmSwitchPermission(
                        connId: client.id, name: "keyboard", enabled: enabled);
                    setState(() {
                      client.keyboard = enabled;
                    });
                  },
                  translate('Allow using keyboard and mouse'),
                ),
                buildPermissionIcon(
                  client.clipboard,
                  Icons.assignment_rounded,
                  (enabled) {
                    bind.cmSwitchPermission(
                        connId: client.id, name: "clipboard", enabled: enabled);
                    setState(() {
                      client.clipboard = enabled;
                    });
                  },
                  translate('Allow using clipboard'),
                ),
                buildPermissionIcon(
                  client.audio,
                  Icons.volume_up_rounded,
                  (enabled) {
                    bind.cmSwitchPermission(
                        connId: client.id, name: "audio", enabled: enabled);
                    setState(() {
                      client.audio = enabled;
                    });
                  },
                  translate('Allow hearing sound'),
                ),
                buildPermissionIcon(
                  client.file,
                  Icons.upload_file_rounded,
                  (enabled) {
                    bind.cmSwitchPermission(
                        connId: client.id, name: "file", enabled: enabled);
                    setState(() {
                      client.file = enabled;
                    });
                  },
                  translate('Allow file copy and paste'),
                ),
                buildPermissionIcon(
                  client.restart,
                  Icons.restart_alt_rounded,
                  (enabled) {
                    bind.cmSwitchPermission(
                        connId: client.id, name: "restart", enabled: enabled);
                    setState(() {
                      client.restart = enabled;
                    });
                  },
                  translate('Allow remote restart'),
                ),
                buildPermissionIcon(
                  client.recording,
                  Icons.videocam_rounded,
                  (enabled) {
                    bind.cmSwitchPermission(
                        connId: client.id, name: "recording", enabled: enabled);
                    setState(() {
                      client.recording = enabled;
                    });
                  },
                  translate('Allow recording session'),
                )
              ],
            ),
          ),
        ],
      ),
    );
  }
}

const double buttonBottomMargin = 8;

class _CmControlPanel extends StatelessWidget {
  final Client client;

  const _CmControlPanel({Key? key, required this.client}) : super(key: key);

  @override
  Widget build(BuildContext context) {
    return client.authorized
        ? client.disconnected
            ? buildDisconnected(context)
            : buildAuthorized(context)
        : buildUnAuthorized(context);
  }

  buildAuthorized(BuildContext context) {
    final bool canElevate = bind.cmCanElevate();
    final model = Provider.of<ServerModel>(context);
    final showElevation = canElevate &&
        model.showElevation &&
        client.type_() == ClientType.remote;
    return Column(
      mainAxisAlignment: MainAxisAlignment.end,
      children: [
        Offstage(
          offstage: !client.inVoiceCall,
          child: buildButton(
            context,
            color: Colors.red,
            onClick: () => closeVoiceCall(),
            icon: Icon(
              Icons.call_end_rounded,
              color: Colors.white,
              size: 14,
            ),
            text: "Stop voice call",
            textColor: Colors.white,
          ),
        ),
        Offstage(
          offstage: !client.incomingVoiceCall,
          child: Row(
            children: [
              Expanded(
                child: buildButton(context,
                    color: MyTheme.accent,
                    onClick: () => handleVoiceCall(true),
                    icon: Icon(
                      Icons.call_rounded,
                      color: Colors.white,
                      size: 14,
                    ),
                    text: "Accept",
                    textColor: Colors.white),
              ),
              Expanded(
                child: buildButton(
                  context,
                  color: Colors.red,
                  onClick: () => handleVoiceCall(false),
                  icon: Icon(
                    Icons.phone_disabled_rounded,
                    color: Colors.white,
                    size: 14,
                  ),
                  text: "Dismiss",
                  textColor: Colors.white,
                ),
              )
            ],
          ),
        ),
        Offstage(
          offstage: !client.fromSwitch,
          child: buildButton(context,
              color: Colors.purple,
              onClick: () => handleSwitchBack(context),
              icon: Icon(Icons.reply, color: Colors.white),
              text: "Switch Sides",
              textColor: Colors.white),
        ),
        Offstage(
          offstage: !showElevation,
          child: buildButton(
            context,
            color: MyTheme.accent,
            onClick: () {
              handleElevate(context);
              windowManager.minimize();
            },
            icon: Icon(
              Icons.security_rounded,
              color: Colors.white,
              size: 14,
            ),
            text: 'Elevate',
            textColor: Colors.white,
          ),
        ),
        Row(
          children: [
            Expanded(
              child: buildButton(context,
                  color: Colors.redAccent,
                  onClick: handleDisconnect,
                  text: 'Disconnect',
                  icon: Icon(
                    Icons.link_off_rounded,
                    color: Colors.white,
                    size: 14,
                  ),
                  textColor: Colors.white),
            ),
          ],
        )
      ],
    ).marginOnly(bottom: buttonBottomMargin);
  }

  buildDisconnected(BuildContext context) {
    return Row(
      mainAxisAlignment: MainAxisAlignment.center,
      children: [
        Expanded(
            child: buildButton(context,
                color: MyTheme.accent,
                onClick: handleClose,
                text: 'Close',
                textColor: Colors.white)),
      ],
    ).marginOnly(bottom: buttonBottomMargin);
  }

  buildUnAuthorized(BuildContext context) {
    final bool canElevate = bind.cmCanElevate();
    final model = Provider.of<ServerModel>(context);
    final showElevation = canElevate &&
        model.showElevation &&
        client.type_() == ClientType.remote;
    final showAccept = model.approveMode != 'password';
    return Column(
      mainAxisAlignment: MainAxisAlignment.end,
      children: [
        Offstage(
          offstage: !showElevation || !showAccept,
          child: buildButton(context, color: Colors.green[700], onClick: () {
            handleAccept(context);
            handleElevate(context);
            windowManager.minimize();
          },
              text: 'Accept and Elevate',
              icon: Icon(
                Icons.security_rounded,
                color: Colors.white,
                size: 14,
              ),
              textColor: Colors.white,
              tooltip: 'accept_and_elevate_btn_tooltip'),
        ),
        Row(
          mainAxisAlignment: MainAxisAlignment.center,
          children: [
            if (showAccept)
              Expanded(
                child: Column(
                  children: [
                    buildButton(
                      context,
                      color: MyTheme.accent,
                      onClick: () {
                        handleAccept(context);
                        windowManager.minimize();
                      },
                      text: 'Accept',
                      textColor: Colors.white,
                    ),
                  ],
                ),
              ),
            Expanded(
              child: buildButton(
                context,
                color: Colors.transparent,
                border: Border.all(color: Colors.grey),
                onClick: handleDisconnect,
                text: 'Cancel',
                textColor: null,
              ),
            ),
          ],
        ),
      ],
    ).marginOnly(bottom: buttonBottomMargin);
  }

  Widget buildButton(BuildContext context,
      {required Color? color,
      required Function() onClick,
      Icon? icon,
      BoxBorder? border,
      required String text,
      required Color? textColor,
      String? tooltip}) {
    Widget textWidget;
    if (icon != null) {
      textWidget = Text(
        translate(text),
        style: TextStyle(color: textColor),
        textAlign: TextAlign.center,
      );
    } else {
      textWidget = Expanded(
        child: Text(
          translate(text),
          style: TextStyle(color: textColor),
          textAlign: TextAlign.center,
        ),
      );
    }
    final borderRadius = BorderRadius.circular(10.0);
    final btn = Container(
      height: 28,
      decoration: BoxDecoration(
          color: color, borderRadius: borderRadius, border: border),
      child: InkWell(
        borderRadius: borderRadius,
        onTap: () => checkClickTime(client.id, onClick),
        child: Row(
          mainAxisAlignment: MainAxisAlignment.center,
          children: [
            Offstage(offstage: icon == null, child: icon).marginOnly(right: 5),
            textWidget,
          ],
        ),
      ),
    );
    return (tooltip != null
            ? Tooltip(
                message: translate(tooltip),
                child: btn,
              )
            : btn)
        .marginAll(4);
  }

  void handleDisconnect() {
    bind.cmCloseConnection(connId: client.id);
  }

  void handleAccept(BuildContext context) {
    final model = Provider.of<ServerModel>(context, listen: false);
    model.sendLoginResponse(client, true);
  }

  void handleElevate(BuildContext context) {
    final model = Provider.of<ServerModel>(context, listen: false);
    model.setShowElevation(false);
    bind.cmElevatePortable(connId: client.id);
  }

  void handleClose() async {
    await bind.cmRemoveDisconnectedConnection(connId: client.id);
    if (await bind.cmGetClientsLength() == 0) {
      windowManager.close();
    }
  }

  void handleSwitchBack(BuildContext context) {
    bind.cmSwitchBack(connId: client.id);
  }

  void handleVoiceCall(bool accept) {
    bind.cmHandleIncomingVoiceCall(id: client.id, accept: accept);
  }

  void closeVoiceCall() {
    bind.cmCloseVoiceCall(id: client.id);
  }
}

void checkClickTime(int id, Function() callback) async {
  var clickCallbackTime = DateTime.now().millisecondsSinceEpoch;
  await bind.cmCheckClickTime(connId: id);
  Timer(const Duration(milliseconds: 120), () async {
    var d = clickCallbackTime - await bind.cmGetClickTime();
    if (d > 120) callback();
  });
}
