part of '../neon_files.dart';

@immutable
class FilesSync implements SyncImplementation<FilesSyncMapping, WebDavFile, FileSystemEntity> {
  const FilesSync();

  @override
  String get appId => AppIDs.files;

  @override
  Future<FilesSyncSources> getSources(final Account account, final FilesSyncMapping mapping) async {
    // This shouldn't be necessary, but it sadly is because of https://github.com/flutter/flutter/issues/25659.
    // Alternative would be to use https://pub.dev/packages/shared_storage,
    // but to be efficient we'd need https://github.com/alexrintt/shared-storage/issues/91
    // or copy the files to the app cache (which is also not optimal).
    if (Platform.isAndroid && !await Permission.manageExternalStorage.request().isGranted) {
      throw const MissingPermissionException(Permission.manageExternalStorage);
    }
    return FilesSyncSources(
      account.client,
      mapping.remotePath,
      mapping.localPath,
    );
  }

  @override
  Map<String, dynamic> serializeMapping(final FilesSyncMapping mapping) => mapping.toJson();

  @override
  FilesSyncMapping deserializeMapping(final Map<String, dynamic> json) => FilesSyncMapping.fromJson(json);

  @override
  Future<FilesSyncMapping?> addMapping(final BuildContext context, final Account account) async {
    final accountsBloc = NeonProvider.of<AccountsBloc>(context);
    final appsBloc = accountsBloc.getAppsBlocFor(account);
    final filesBloc = appsBloc.getAppBlocByID(AppIDs.files)! as FilesBloc;
    final filesBrowserBloc = filesBloc.getNewFilesBrowserBloc();

    final remotePath = await showDialog<PathUri>(
      context: context,
      builder: (final context) => FilesChooseFolderDialog(
        bloc: filesBrowserBloc,
        filesBloc: filesBloc,
        originalPath: PathUri.cwd(),
      ),
    );
    filesBrowserBloc.dispose();
    if (remotePath == null) {
      return null;
    }

    final localPath = await FileUtils.pickDirectory();
    if (localPath == null) {
      return null;
    }
    if (!context.mounted) {
      return null;
    }

    return FilesSyncMapping(
      appId: AppIDs.files,
      accountId: account.id,
      remotePath: remotePath,
      localPath: Directory(localPath),
      journal: SyncJournal(),
    );
  }

  @override
  String getMappingDisplayTitle(final FilesSyncMapping mapping) => mapping.remotePath.toString();

  @override
  String getMappingDisplaySubtitle(final FilesSyncMapping mapping) => mapping.localPath.path;

  @override
  String getMappingId(final FilesSyncMapping mapping) =>
      '${Uri.encodeComponent(mapping.remotePath.toString())}-${Uri.encodeComponent(mapping.localPath.path)}';

  @override
  Widget getConflictDetailsLocal(final BuildContext context, final FileSystemEntity object) {
    final stat = object.statSync();
    return FilesFileTile(
      showFullPath: true,
      filesBloc: NeonProvider.of<FilesBloc>(context),
      details: FileDetails(
        uri: PathUri.parse(object.path),
        size: stat.size,
        etag: '',
        mimeType: '',
        lastModified: stat.modified,
        hasPreview: false,
        isFavorite: false,
      ),
    );
  }

  @override
  Widget getConflictDetailsRemote(final BuildContext context, final WebDavFile object) => FilesFileTile(
        showFullPath: true,
        filesBloc: NeonProvider.of<FilesBloc>(context),
        details: FileDetails.fromWebDav(
          file: object,
        ),
      );
}