import 'dart:developer';

import 'package:adaptive_dialog/adaptive_dialog.dart';
import 'package:adaptive_page_layout/adaptive_page_layout.dart';
import 'package:fluffychat/views/widgets/dialogs/permission_slider_dialog.dart';
import 'package:fluffychat/views/widgets/max_width_body.dart';
import 'package:future_loading_dialog/future_loading_dialog.dart';
import 'package:fluffychat/views/widgets/matrix.dart';

import 'package:flutter/material.dart';
import 'package:flutter_gen/gen_l10n/l10n.dart';
import 'package:famedlysdk/famedlysdk.dart';

class ChatPermissionsSettings extends StatelessWidget {
  final String roomId;

  const ChatPermissionsSettings(this.roomId, {Key key}) : super(key: key);

  void _editPowerLevel(BuildContext context, String key, int currentLevel,
      {String category}) async {
    final room = Matrix.of(context).client.getRoomById(roomId);
    if (!room.canSendEvent(EventTypes.RoomPowerLevels)) {
      AdaptivePageLayout.of(context)
          .showSnackBar(SnackBar(content: Text(L10n.of(context).noPermission)));
      return;
    }
    final newLevel =
        await PermissionSliderDialog(initialPermission: currentLevel)
            .show(context);
    if (newLevel == null) return;
    final content = Map<String, dynamic>.from(
        room.getState(EventTypes.RoomPowerLevels).content);
    if (category != null) {
      if (!content.containsKey(category)) {
        content[category] = <String, dynamic>{};
      }
      content[category][key] = newLevel;
    } else {
      content[key] = newLevel;
    }
    inspect(content);
    await showFutureLoadingDialog(
      context: context,
      future: () =>
          room.client.sendState(room.id, EventTypes.RoomPowerLevels, content),
    );
  }

  @override
  Widget build(BuildContext context) {
    return Scaffold(
      appBar: AppBar(
        leading: BackButton(),
        title: Text(L10n.of(context).editChatPermissions),
      ),
      body: MaxWidthBody(
        withScrolling: true,
        child: StreamBuilder(
          stream: Matrix.of(context).client.onSync.stream.where(
                (e) =>
                    (e?.rooms?.join?.containsKey(roomId) ?? false) &&
                    (e.rooms.join[roomId]?.timeline?.events?.any(
                            (s) => s.type == EventTypes.RoomPowerLevels) ??
                        false),
              ),
          builder: (context, _) {
            final room = Matrix.of(context).client.getRoomById(roomId);
            final powerLevelsContent = Map<String, dynamic>.from(
                room.getState(EventTypes.RoomPowerLevels).content);
            final powerLevels = Map<String, dynamic>.from(powerLevelsContent)
              ..removeWhere((k, v) => !(v is int));
            final eventsPowerLevels =
                Map<String, dynamic>.from(powerLevelsContent['events'])
                  ..removeWhere((k, v) => !(v is int));

            return Column(
              children: [
                Column(
                  mainAxisSize: MainAxisSize.min,
                  children: [
                    for (var entry in powerLevels.entries)
                      PermissionsListTile(
                        permissionKey: entry.key,
                        permission: entry.value,
                        onTap: () =>
                            _editPowerLevel(context, entry.key, entry.value),
                      ),
                    Divider(thickness: 1),
                    ListTile(
                      title: Text(
                        L10n.of(context).notifications,
                        style: TextStyle(
                          color: Theme.of(context).primaryColor,
                          fontWeight: FontWeight.bold,
                        ),
                      ),
                    ),
                    Builder(builder: (context) {
                      final key = 'rooms';
                      final int value = powerLevelsContent
                              .containsKey('notifications')
                          ? powerLevelsContent['notifications']['rooms'] ?? 0
                          : 0;
                      return PermissionsListTile(
                        permissionKey: key,
                        permission: value,
                        category: 'notifications',
                        onTap: () => _editPowerLevel(context, key, value,
                            category: 'notifications'),
                      );
                    }),
                    Divider(thickness: 1),
                    ListTile(
                      title: Text(
                        L10n.of(context).configureChat,
                        style: TextStyle(
                          color: Theme.of(context).primaryColor,
                          fontWeight: FontWeight.bold,
                        ),
                      ),
                    ),
                    if (eventsPowerLevels != null)
                      for (var entry in eventsPowerLevels.entries)
                        PermissionsListTile(
                          permissionKey: entry.key,
                          category: 'events',
                          permission: entry.value,
                          onTap: () => _editPowerLevel(
                              context, entry.key, entry.value,
                              category: 'events'),
                        ),
                    if (room.ownPowerLevel >= 100) ...{
                      Divider(thickness: 1),
                      FutureBuilder<ServerCapabilities>(
                        future: room.client.requestServerCapabilities(),
                        builder: (context, snapshot) {
                          if (!snapshot.hasData) {
                            return Center(child: CircularProgressIndicator());
                          }
                          final String roomVersion = room
                                  .getState(EventTypes.RoomCreate)
                                  .content['room_version'] ??
                              '1';
                          final shouldHaveVersion =
                              snapshot.data.mRoomVersions.defaultVersion;

                          return ListTile(
                            title: Text('Current room version: $roomVersion'),
                            subtitle: roomVersion == shouldHaveVersion
                                ? null
                                : Text(
                                    'Upgrade to $shouldHaveVersion available!',
                                    style: TextStyle(
                                        fontWeight: FontWeight.bold,
                                        color: Theme.of(context).accentColor),
                                  ),
                            onTap: () async {
                              final newVersion =
                                  await showConfirmationDialog<String>(
                                context: context,
                                title: 'Choose Room Version',
                                actions: snapshot
                                    .data.mRoomVersions.available.entries
                                    .where((r) => r.key != roomVersion)
                                    .map((version) => AlertDialogAction(
                                        key: version.key,
                                        label:
                                            '${version.key} (${version.value.toString().split('.').last})')),
                              );
                              await showFutureLoadingDialog(
                                context: context,
                                future: () =>
                                    room.client.upgradeRoom(roomId, newVersion),
                              ).then(
                                  (_) => AdaptivePageLayout.of(context).pop());
                            },
                          );
                        },
                      ),
                    },
                  ],
                ),
              ],
            );
          },
        ),
      ),
    );
  }
}

class PermissionsListTile extends StatelessWidget {
  final String permissionKey;
  final int permission;
  final String category;
  final void Function() onTap;

  const PermissionsListTile({
    Key key,
    @required this.permissionKey,
    @required this.permission,
    this.category,
    this.onTap,
  }) : super(key: key);

  String getLocalizedPowerLevelString(BuildContext context) {
    if (category == null) {
      switch (permissionKey) {
        case 'users_default':
          return L10n.of(context).defaultPermissionLevel;
        case 'events_default':
          return L10n.of(context).sendMessages;
        case 'state_default':
          return L10n.of(context).configureChat;
        case 'ban':
          return L10n.of(context).banFromChat;
        case 'kick':
          return L10n.of(context).kickFromChat;
        case 'redact':
          return L10n.of(context).deleteMessage;
        case 'invite':
          return L10n.of(context).inviteContact;
      }
    } else if (category == 'notifications') {
      switch (permissionKey) {
        case 'rooms':
          return L10n.of(context).notifications;
      }
    } else if (category == 'events') {
      switch (permissionKey) {
        case EventTypes.RoomName:
          return L10n.of(context).changeTheNameOfTheGroup;
        case EventTypes.RoomPowerLevels:
          return L10n.of(context).editChatPermissions;
        case EventTypes.HistoryVisibility:
          return L10n.of(context).visibilityOfTheChatHistory;
        case EventTypes.RoomCanonicalAlias:
          return L10n.of(context).setInvitationLink;
        case EventTypes.RoomAvatar:
          return L10n.of(context).editRoomAvatar;
        case EventTypes.RoomTombstone:
          return L10n.of(context).replaceRoomWithNewerVersion;
        case EventTypes.Encryption:
          return L10n.of(context).enableEncryption;
        case 'm.room.server_acl':
          return L10n.of(context).editBlockedServers;
      }
    }
    return permissionKey;
  }

  @override
  Widget build(BuildContext context) {
    return ListTile(
      onTap: onTap,
      leading: CircleAvatar(
        backgroundColor: Theme.of(context).scaffoldBackgroundColor,
        foregroundColor: Colors.grey,
        child: Icon(Icons.edit_attributes_outlined),
      ),
      title: Text(getLocalizedPowerLevelString(context)),
      subtitle: Row(
        children: [
          Container(
            padding: EdgeInsets.all(4),
            decoration: BoxDecoration(
              color: Theme.of(context).secondaryHeaderColor,
              borderRadius: BorderRadius.circular(8),
            ),
            child: Center(
              child: Text(permission.toString()),
            ),
          ),
          SizedBox(width: 8),
          Text(permission.toLocalizedPowerLevelString(context)),
        ],
      ),
    );
  }
}

extension on int {
  String toLocalizedPowerLevelString(BuildContext context) {
    return this == 100
        ? L10n.of(context).admin
        : this >= 50
            ? L10n.of(context).moderator
            : L10n.of(context).participant;
  }
}