import 'dart:developer';

import 'package:sorted/sorted.dart';

import '../../../infrastructure/utilityWidgets/loadableHydratedBloc/loadable_hydrated_bloc.dart';
import '../../../infrastructure/utilityWidgets/loadableHydratedBloc/loadable_hydrated_bloc_event.dart';
import '../repository/files_repository.dart';
import 'files_event.dart';
import 'files_state.dart';

class FilesBloc extends LoadableHydratedBloc<FilesEvent, FilesState, FilesRepository> {
  static const String basePath = '/';

  FilesBloc() {
    add(Emit((state) => state.copyWith(currentFolder: basePath)));
    on<EnterFolder>((event, emit) {
      add(Emit((state) {
        log('setFolder');
        return state.copyWith(currentFolder: event.absolutePath);
      }, fetch: true));
    });
  }

  List<File>? getVisibleFiles() => innerState?.files[innerState?.currentFolder];
  String getCurrentFolder() => innerState?.currentFolder ?? basePath;
  String getCurrentFolderName() {
    var folder = innerState?.currentFolder.split('/').reversed.elementAt(1);
    return folder!.isEmpty ? 'Dateien' : folder;
  }
  bool canGoBack() => innerState?.currentFolder != basePath;
  String goBackLocation() {
    var pathSegments = innerState?.currentFolder.split(basePath) ?? [];
    if (pathSegments.isNotEmpty) {
      pathSegments.removeLast();
      pathSegments.removeLast();
    }
    return pathSegments.join(basePath) + basePath;
  }

  List currentSortConfiguration() => [
    SortedComparable<File, DateTime>((file) => file.updatedAt ?? DateTime.now()),
  ];

  @override
  FilesState fromNothing() => const FilesState(currentFolder: basePath, files: {});

  @override
  FilesState fromStorage(Map<String, dynamic> json) => FilesState.fromJson(json);

  @override
  Future<void> gatherData() async {
    var fetchFolder = getCurrentFolder();
    log(fetchFolder);
    var files = await repo.getFileList(fetchFolder);
    var newFileMap = Map.of(innerState?.files ?? <String, List<File>>{});
    newFileMap[fetchFolder] = files;
    if(fetchFolder != getCurrentFolder()) {
      log('Fetch aborted due to folder change (expected "$fetchFolder" got "${getCurrentFolder()}")');
      return;
    }
    add(DataGathered((state) => state.copyWith(files: newFileMap)));
  }

  @override
  FilesRepository repository() => FilesRepository();

  @override
  Map<String, dynamic>? toStorage(FilesState state) => state.toJson();

}