// ignore_for_file: empty_catches, unused_catch_stack

import 'dart:async';

import 'package:after_layout/after_layout.dart';
import 'package:flutter/material.dart';
import 'package:karing/app/local_services/vpn_service.dart';
import 'package:karing/app/modules/server_manager.dart';
import 'package:karing/app/modules/setting_manager.dart';
import 'package:karing/app/runtime/return_result.dart';
import 'package:karing/app/utils/backup_and_sync_utils.dart';
import 'package:karing/app/utils/file_utils.dart';
import 'package:karing/app/utils/path_utils.dart';
import 'package:karing/app/utils/webdav_utils.dart';
import 'package:karing/i18n/strings.g.dart';
import 'package:karing/screens/dialog_utils.dart';
import 'package:karing/screens/group_helper.dart';
import 'package:karing/screens/group_item_creator.dart';
import 'package:karing/screens/group_item_options.dart';
import 'package:karing/screens/group_screen.dart';
import 'package:karing/screens/theme_config.dart';
import 'package:karing/screens/theme_define.dart';
import 'package:karing/screens/widgets/framework.dart';
import 'package:path/path.dart' as path;
import 'package:webdav_client_plus/webdav_client_plus.dart';

class BackupAndSyncWebdavScreen extends LasyRenderingStatefulWidget {
  static RouteSettings routSettings() {
    return const RouteSettings(name: "BackupAndSyncWebdavScreen");
  }

  const BackupAndSyncWebdavScreen({super.key});

  @override
  State<BackupAndSyncWebdavScreen> createState() =>
      _BackupAndSyncWebdavScreenState();
}

class _BackupAndSyncWebdavScreenState
    extends LasyRenderingState<BackupAndSyncWebdavScreen>
    with AfterLayoutMixin {
  bool _connecting = true;
  bool _loading = true;
  bool _uploading = false;

  WebdavClient? _webdavClient;
  List<String> _fileList = [];
  final TextEditingController _urlController = TextEditingController();
  final TextEditingController _userController = TextEditingController();
  final TextEditingController _passwordController = TextEditingController();

  @override
  void initState() {
    super.initState();
    var settingConfig = SettingManager.getConfig();
    _urlController.value = _urlController.value.copyWith(
      text: settingConfig.webdav.url,
    );
    _userController.value = _userController.value.copyWith(
      text: settingConfig.webdav.user,
    );
    _passwordController.value = _passwordController.value.copyWith(
      text: settingConfig.webdav.password,
    );
  }

  @override
  void dispose() {
    _urlController.dispose();
    _userController.dispose();
    _passwordController.dispose();
    super.dispose();
  }

  @override
  FutureOr<void> afterFirstLayout(BuildContext context) async {
    var settingConfig = SettingManager.getConfig();
    if (settingConfig.webdav.url.isEmpty ||
        settingConfig.webdav.user.isEmpty ||
        settingConfig.webdav.password.isEmpty) {
      await onTapSetting();
    } else {
      await reconnect();
      await list();
    }
  }

  @override
  Widget build(BuildContext context) {
    final tcontext = Translations.of(context);
    Size windowSize = MediaQuery.of(context).size;
    return Scaffold(
      appBar: PreferredSize(preferredSize: Size.zero, child: AppBar()),
      body: SafeArea(
        child: Padding(
          padding: const EdgeInsets.fromLTRB(0, 20, 0, 0),
          child: Column(
            children: [
              Padding(
                padding: const EdgeInsets.fromLTRB(0, 0, 0, 0),
                child: Row(
                  mainAxisAlignment: MainAxisAlignment.spaceBetween,
                  children: [
                    InkWell(
                      onTap: () => Navigator.pop(context),
                      child: const SizedBox(
                        width: 50,
                        height: 30,
                        child: Icon(Icons.arrow_back_ios_outlined, size: 26),
                      ),
                    ),
                    SizedBox(
                      width: windowSize.width - 50 * 3,
                      child: Text(
                        tcontext.meta.webdav,
                        textAlign: TextAlign.center,
                        overflow: TextOverflow.ellipsis,
                        style: const TextStyle(
                          fontWeight: ThemeConfig.kFontWeightTitle,
                          fontSize: ThemeConfig.kFontSizeTitle,
                        ),
                      ),
                    ),
                    Row(
                      children: [
                        _uploading
                            ? const Row(
                                children: [
                                  SizedBox(width: 12),
                                  SizedBox(
                                    width: 26,
                                    height: 26,
                                    child: RepaintBoundary(
                                      child: CircularProgressIndicator(),
                                    ),
                                  ),
                                  SizedBox(width: 12),
                                ],
                              )
                            : InkWell(
                                onTap: _webdavClient == null
                                    ? null
                                    : () {
                                        onTapBackup();
                                      },
                                child: const SizedBox(
                                  width: 50,
                                  height: 30,
                                  child: Icon(
                                    Icons.cloud_upload_outlined,
                                    size: 26,
                                  ),
                                ),
                              ),
                        InkWell(
                          onTap: () {
                            onTapSetting();
                          },
                          child: const SizedBox(
                            width: 50,
                            height: 30,
                            child: Icon(Icons.settings, size: 26),
                          ),
                        ),
                      ],
                    ),
                  ],
                ),
              ),
              const SizedBox(height: 10),
              Expanded(child: _loadListView()),
            ],
          ),
        ),
      ),
    );
  }

  Widget _loadListView() {
    if (_connecting || _loading) {
      return const Column(
        mainAxisAlignment: MainAxisAlignment.center,
        crossAxisAlignment: CrossAxisAlignment.start,
        children: [
          SizedBox(
            width: 26,
            height: 26,
            child: RepaintBoundary(child: CircularProgressIndicator()),
          ),
        ],
      );
    }
    Size windowSize = MediaQuery.of(context).size;
    return Scrollbar(
      thumbVisibility: true,
      child: ListView.separated(
        itemCount: _fileList.length,
        itemBuilder: (BuildContext context, int index) {
          var current = _fileList[index];
          return createWidget(current, windowSize);
        },
        separatorBuilder: (BuildContext context, int index) {
          return const Divider(height: 1, thickness: 0.3);
        },
      ),
    );
  }

  Widget createWidget(String current, Size windowSize) {
    return Material(
      borderRadius: ThemeDefine.kBorderRadius,
      child: Container(
        padding: const EdgeInsets.symmetric(horizontal: 10),
        width: double.infinity,
        //height: 66,
        child: Row(
          children: [
            Row(
              children: [
                Column(
                  mainAxisAlignment: MainAxisAlignment.center,
                  crossAxisAlignment: CrossAxisAlignment.start,
                  children: [
                    Row(
                      children: [
                        SizedBox(
                          width: windowSize.width - 100,
                          child: Column(
                            mainAxisAlignment: MainAxisAlignment.center,
                            crossAxisAlignment: CrossAxisAlignment.start,
                            children: [
                              Text(
                                current,
                                style: TextStyle(
                                  fontSize: ThemeConfig.kFontSizeGroupItem,
                                ),
                              ),
                            ],
                          ),
                        ),
                        const SizedBox(width: 5),
                        InkWell(
                          onTap: () {
                            onTapDownload(current);
                          },
                          child: const SizedBox(
                            width: 30,
                            height: ThemeConfig.kListItemHeight2,
                            child: Icon(
                              Icons.cloud_download_outlined,
                              size: 26,
                            ),
                          ),
                        ),
                        const SizedBox(width: 10),
                        InkWell(
                          onTap: () {
                            onTapDelete(current);
                          },
                          child: const SizedBox(
                            width: 30,
                            height: ThemeConfig.kListItemHeight2,
                            child: Icon(
                              Icons.remove_circle_outlined,
                              size: 26,
                              color: Colors.red,
                            ),
                          ),
                        ),
                      ],
                    ),
                  ],
                ),
              ],
            ),
          ],
        ),
      ),
    );
  }

  Future<void> reconnect() async {
    var settingConfig = SettingManager.getConfig();
    if (settingConfig.webdav.url.isEmpty ||
        settingConfig.webdav.user.isEmpty ||
        settingConfig.webdav.password.isEmpty) {
      Navigator.pop(context);
      return;
    }
    if (!mounted) {
      return;
    }

    _connecting = true;
    _webdavClient = null;
    _fileList.clear();
    setState(() {});
    List<int?> ports = await VPNService.getPortsByPrefer(false);
    late ReturnResult<WebdavClient> result;
    for (var port in ports) {
      result = await WebdavUtils.connect(
        port,
        settingConfig.webdav.url,
        settingConfig.webdav.user,
        settingConfig.webdav.password,
      );
      if (!mounted) {
        return;
      }
      if (result.error == null) {
        break;
      }
    }
    if (!mounted) {
      return;
    }
    _connecting = false;
    setState(() {});
    if (result.error != null) {
      final tcontext = Translations.of(context);
      DialogUtils.showAlertDialog(
        context,
        tcontext.BackupAndSyncWebdavScreen.webdavLoginFailed +
            result.error!.message,
        showCopy: true,
        showFAQ: true,
        withVersion: true,
      );
      return;
    }
    _webdavClient = result.data;
    setState(() {});
  }

  Future<void> list() async {
    if (!mounted) {
      return;
    }
    _loading = false;
    if (_webdavClient == null) {
      return;
    }
    _loading = true;
    setState(() {});
    var result = await WebdavUtils.list(_webdavClient!);
    if (!mounted) {
      return;
    }
    _loading = false;
    setState(() {});
    if (result.error != null) {
      final tcontext = Translations.of(context);
      DialogUtils.showAlertDialog(
        context,
        tcontext.BackupAndSyncWebdavScreen.webdavListFailed +
            result.error!.message,
        showCopy: true,
        showFAQ: true,
        withVersion: true,
      );
      return;
    }
    _fileList = result.data!;
    _fileList.sort((a, b) => b.compareTo(a));

    setState(() {});
  }

  Future<void> onTapBackup() async {
    if (_webdavClient == null) {
      return;
    }
    if (!mounted) {
      return;
    }
    _uploading = true;
    setState(() {});
    try {
      String dir = await PathUtils.cacheDir();
      if (!mounted) {
        return;
      }
      String filePath = path.join(dir, BackupAndSyncUtils.getZipFileName());
      ReturnResultError? error = await ServerManager.backupToZip(
        context,
        filePath,
      );
      if (!mounted) {
        FileUtils.deletePath(filePath);
        return;
      }
      if (error != null) {
        DialogUtils.showAlertDialog(
          context,
          error.message,
          showCopy: true,
          showFAQ: true,
          withVersion: true,
        );
        return;
      }
      error = await WebdavUtils.upload(
        _webdavClient!,
        relativePath: path.basename(filePath),
        localPath: filePath,
      );

      FileUtils.deletePath(filePath);
      if (!mounted) {
        return;
      }
      _uploading = false;
      setState(() {});
      if (error != null) {
        DialogUtils.showAlertDialog(
          context,
          error.message,
          showCopy: true,
          showFAQ: true,
          withVersion: true,
        );
        return;
      }
      await list();
    } catch (err, stacktrace) {
      if (!mounted) {
        return;
      }
      _uploading = false;
      setState(() {});
      DialogUtils.showAlertDialog(
        context,
        err.toString(),
        showCopy: true,
        showFAQ: true,
        withVersion: true,
      );
    }
  }

  Future<void> onTapSetting() async {
    final tcontext = Translations.of(context);

    Future<List<GroupItem>> getOptions(
      BuildContext context,
      SetStateCallback? setstate,
    ) async {
      List<GroupItemOptions> options = [
        GroupItemOptions(
          textFormFieldOptions: GroupItemTextFieldOptions(
            name: tcontext.BackupAndSyncWebdavScreen.webdavServerUrl,
            keyboardType: TextInputType.url,
            hint: "${tcontext.meta.required}[https://xxxx/webdav]",
            textWidthPercent: 0.6,
            controller: _urlController,
            autoFocus: true,
            textInputAction: TextInputAction.next,
          ),
        ),
        GroupItemOptions(
          textFormFieldOptions: GroupItemTextFieldOptions(
            name: tcontext.meta.account,
            hint: tcontext.meta.required,
            textWidthPercent: 0.6,
            controller: _userController,
            textInputAction: TextInputAction.next,
          ),
        ),
        GroupItemOptions(
          textFormFieldOptions: GroupItemTextFieldOptions(
            name: tcontext.meta.password,
            hint: tcontext.meta.required,
            textWidthPercent: 0.6,
            obscureText: true,
            controller: _passwordController,
            textInputAction: TextInputAction.done,
            onSubmitted: (String value) {
              FocusScope.of(context).nextFocus();
            },
          ),
        ),
      ];

      List<GroupItemOptions> options1 = [
        GroupItemOptions(
          pushOptions: GroupItemPushOptions(
            name: tcontext.meta.reset,
            onPush: () async {
              SettingManager.getConfig().webdav.url = "";
              SettingManager.getConfig().webdav.user = "";
              SettingManager.getConfig().webdav.password = "";
              SettingManager.save();
              Navigator.pop(context, true);
            },
          ),
        ),
      ];

      return [GroupItem(options: options), GroupItem(options: options1)];
    }

    bool? done = await Navigator.push(
      context,
      MaterialPageRoute(
        settings: GroupScreen.routSettings("webdav"),
        builder: (context) => GroupScreen(
          title: tcontext.meta.webdav,
          getOptions: getOptions,
          onDone: (BuildContext context) async {
            if (!mounted) {
              return false;
            }
            if (_urlController.text.isEmpty ||
                _userController.text.isEmpty ||
                _passwordController.text.isEmpty) {
              DialogUtils.showAlertDialog(
                context,
                tcontext.BackupAndSyncWebdavScreen.webdavRequired,
              );
              return false;
            }
            Uri? uri = Uri.tryParse(_urlController.text);
            if (uri == null ||
                (uri.scheme != "http" && uri.scheme != "https")) {
              DialogUtils.showAlertDialog(context, tcontext.meta.urlInvalid);
              return false;
            }

            SettingManager.getConfig().webdav.url = _urlController.text.trim();
            SettingManager.getConfig().webdav.user = _userController.text
                .trim();
            SettingManager.getConfig().webdav.password = _passwordController
                .text
                .trim();
            SettingManager.save();

            return true;
          },
        ),
      ),
    );
    if (done == true) {
      await reconnect();
      await list();
    } else {
      var settingConfig = SettingManager.getConfig();
      if (settingConfig.webdav.url.isEmpty ||
          settingConfig.webdav.user.isEmpty ||
          settingConfig.webdav.password.isEmpty) {
        if (!mounted) {
          return;
        }
        Navigator.pop(context);
        return;
      }
    }
  }

  Future<void> onTapDownload(String filename) async {
    if (_webdavClient == null) {
      return;
    }

    String dir = await PathUtils.cacheDir();
    String filePath = path.join(dir, BackupAndSyncUtils.getZipFileName());
    var error = await WebdavUtils.download(
      _webdavClient!,
      relativePath: filename,
      localPath: filePath,
    );
    if (!mounted) {
      return;
    }
    if (error != null) {
      DialogUtils.showAlertDialog(
        context,
        error.message,
        showCopy: true,
        showFAQ: true,
        withVersion: true,
      );
      return;
    }
    await GroupHelper.backupRestoreFromZip(context, filePath, confirm: true);
    await FileUtils.deletePath(filePath);
  }

  Future<void> onTapDelete(String filename) async {
    if (_webdavClient == null) {
      return;
    }
    var error = await WebdavUtils.delete(_webdavClient!, filename);
    if (!mounted) {
      return;
    }
    if (error != null) {
      DialogUtils.showAlertDialog(
        context,
        error.message,
        showCopy: true,
        showFAQ: true,
        withVersion: true,
      );
      return;
    }
    await list();
  }
}
