import 'package:flutter/material.dart';
import 'package:flutter/services.dart';

import 'package:badges/badges.dart';
import 'package:flutter_gen/gen_l10n/l10n.dart';
import 'package:keyboard_shortcuts/keyboard_shortcuts.dart';
import 'package:vrouter/vrouter.dart';

import 'package:fluffychat/config/app_config.dart';
import 'package:fluffychat/config/themes.dart';
import 'package:fluffychat/pages/chat_list/chat_list.dart';
import 'package:fluffychat/widgets/avatar.dart';
import 'package:fluffychat/widgets/unread_rooms_badge.dart';
import '../../widgets/matrix.dart';
import 'chat_list_body.dart';
import 'chat_list_header.dart';
import 'start_chat_fab.dart';

class ChatListView extends StatelessWidget {
  final ChatListController controller;

  const ChatListView(this.controller, {Key? key}) : super(key: key);

  List<NavigationDestination> getNavigationDestinations(BuildContext context) {
    final badgePosition = BadgePosition.topEnd(top: -12, end: -8);
    return [
      if (AppConfig.separateChatTypes) ...[
        NavigationDestination(
          icon: UnreadRoomsBadge(
            badgePosition: badgePosition,
            filter: controller.getRoomFilterByActiveFilter(ActiveFilter.groups),
            child: const Icon(Icons.groups_outlined),
          ),
          selectedIcon: UnreadRoomsBadge(
            badgePosition: badgePosition,
            filter: controller.getRoomFilterByActiveFilter(ActiveFilter.groups),
            child: const Icon(Icons.groups),
          ),
          label: L10n.of(context)!.groups,
        ),
        NavigationDestination(
          icon: UnreadRoomsBadge(
            badgePosition: badgePosition,
            filter:
                controller.getRoomFilterByActiveFilter(ActiveFilter.messages),
            child: const Icon(Icons.chat_outlined),
          ),
          selectedIcon: UnreadRoomsBadge(
            badgePosition: badgePosition,
            filter:
                controller.getRoomFilterByActiveFilter(ActiveFilter.messages),
            child: const Icon(Icons.chat),
          ),
          label: L10n.of(context)!.messages,
        ),
      ] else
        NavigationDestination(
          icon: UnreadRoomsBadge(
            badgePosition: badgePosition,
            filter:
                controller.getRoomFilterByActiveFilter(ActiveFilter.allChats),
            child: const Icon(Icons.chat_outlined),
          ),
          selectedIcon: UnreadRoomsBadge(
            badgePosition: badgePosition,
            filter:
                controller.getRoomFilterByActiveFilter(ActiveFilter.allChats),
            child: const Icon(Icons.chat),
          ),
          label: L10n.of(context)!.chats,
        ),
      if (controller.spaces.isNotEmpty)
        const NavigationDestination(
          icon: Icon(Icons.workspaces_outlined),
          selectedIcon: Icon(Icons.workspaces),
          label: 'Spaces',
        ),
    ];
  }

  @override
  Widget build(BuildContext context) {
    final client = Matrix.of(context).client;
    return StreamBuilder<Object?>(
      stream: Matrix.of(context).onShareContentChanged.stream,
      builder: (_, __) {
        final selectMode = controller.selectMode;
        return VWidgetGuard(
          onSystemPop: (redirector) async {
            final selMode = controller.selectMode;
            if (selMode != SelectMode.normal) {
              controller.cancelAction();
              redirector.stopRedirection();
              return;
            }
            if (controller.activeFilter !=
                (AppConfig.separateChatTypes
                    ? ActiveFilter.messages
                    : ActiveFilter.allChats)) {
              controller
                  .onDestinationSelected(AppConfig.separateChatTypes ? 1 : 0);
              redirector.stopRedirection();
              return;
            }
          },
          child: Row(
            children: [
              if (FluffyThemes.isColumnMode(context) &&
                  FluffyThemes.getDisplayNavigationRail(context)) ...[
                Builder(builder: (context) {
                  final allSpaces = client.rooms.where((room) => room.isSpace);
                  final rootSpaces = allSpaces
                      .where(
                        (space) => !allSpaces.any(
                          (parentSpace) => parentSpace.spaceChildren
                              .any((child) => child.roomId == space.id),
                        ),
                      )
                      .toList();
                  final destinations = getNavigationDestinations(context);

                  return SizedBox(
                    width: 64,
                    child: ListView.builder(
                      scrollDirection: Axis.vertical,
                      itemCount: rootSpaces.length + destinations.length,
                      itemBuilder: (context, i) {
                        if (i < destinations.length) {
                          final isSelected = i == controller.selectedIndex;
                          return Container(
                            height: 64,
                            width: 64,
                            decoration: BoxDecoration(
                              border: Border(
                                bottom: i == (destinations.length - 1)
                                    ? BorderSide(
                                        width: 1,
                                        color: Theme.of(context).dividerColor,
                                      )
                                    : BorderSide.none,
                                left: BorderSide(
                                  color: isSelected
                                      ? Theme.of(context).colorScheme.primary
                                      : Colors.transparent,
                                  width: 4,
                                ),
                                right: const BorderSide(
                                  color: Colors.transparent,
                                  width: 4,
                                ),
                              ),
                            ),
                            alignment: Alignment.center,
                            child: IconButton(
                              color: isSelected
                                  ? Theme.of(context).colorScheme.secondary
                                  : null,
                              icon: CircleAvatar(
                                  backgroundColor: isSelected
                                      ? Theme.of(context).colorScheme.secondary
                                      : Theme.of(context)
                                          .colorScheme
                                          .background,
                                  foregroundColor: isSelected
                                      ? Theme.of(context)
                                          .colorScheme
                                          .onSecondary
                                      : Theme.of(context)
                                          .colorScheme
                                          .onBackground,
                                  child: i == controller.selectedIndex
                                      ? destinations[i].selectedIcon ??
                                          destinations[i].icon
                                      : destinations[i].icon),
                              tooltip: destinations[i].label,
                              onPressed: () =>
                                  controller.onDestinationSelected(i),
                            ),
                          );
                        }
                        i -= destinations.length;
                        final isSelected =
                            controller.activeFilter == ActiveFilter.spaces &&
                                rootSpaces[i].id == controller.activeSpaceId;
                        return Container(
                          height: 64,
                          width: 64,
                          decoration: BoxDecoration(
                            border: Border(
                              left: BorderSide(
                                color: isSelected
                                    ? Theme.of(context).colorScheme.secondary
                                    : Colors.transparent,
                                width: 4,
                              ),
                              right: const BorderSide(
                                color: Colors.transparent,
                                width: 4,
                              ),
                            ),
                          ),
                          alignment: Alignment.center,
                          child: IconButton(
                            tooltip: rootSpaces[i].displayname,
                            icon: Avatar(
                              mxContent: rootSpaces[i].avatar,
                              name: rootSpaces[i].displayname,
                              size: 32,
                              fontSize: 12,
                            ),
                            onPressed: () =>
                                controller.setActiveSpace(rootSpaces[i].id),
                          ),
                        );
                      },
                    ),
                  );
                }),
                Container(
                  color: Theme.of(context).dividerColor,
                  width: 1,
                ),
              ],
              Expanded(
                child: GestureDetector(
                  onTap: FocusManager.instance.primaryFocus?.unfocus,
                  excludeFromSemantics: true,
                  behavior: HitTestBehavior.translucent,
                  child: Scaffold(
                    appBar: ChatListHeader(controller: controller),
                    body: ChatListViewBody(controller),
                    bottomNavigationBar: controller.displayNavigationBar
                        ? NavigationBar(
                            height: 64,
                            selectedIndex: controller.selectedIndex,
                            onDestinationSelected:
                                controller.onDestinationSelected,
                            destinations: getNavigationDestinations(context),
                          )
                        : null,
                    floatingActionButtonLocation:
                        controller.filteredRooms.isEmpty
                            ? FloatingActionButtonLocation.centerFloat
                            : null,
                    floatingActionButton: selectMode == SelectMode.normal
                        ? KeyBoardShortcuts(
                            keysToPress: {
                              LogicalKeyboardKey.controlLeft,
                              LogicalKeyboardKey.keyN
                            },
                            onKeysPressed: () =>
                                VRouter.of(context).to('/newprivatechat'),
                            helpLabel: L10n.of(context)!.newChat,
                            child: StartChatFloatingActionButton(
                              controller: controller,
                            ),
                          )
                        : null,
                  ),
                ),
              ),
            ],
          ),
        );
      },
    );
  }
}

enum ChatListPopupMenuItemActions {
  createGroup,
  createSpace,
  discover,
  setStatus,
  inviteContact,
  settings,
}
