import 'package:flutter/material.dart';
import 'package:logging/logging.dart';
import 'package:result_monad/result_monad.dart';

import '../globals.dart';
import '../models/connection.dart';
import '../models/exec_error.dart';
import '../models/group_data.dart';
import 'auth_service.dart';

class ConnectionsManager extends ChangeNotifier {
  static final _logger = Logger('$ConnectionsManager');
  final _connectionsById = <String, Connection>{};
  final _connectionsByName = <String, Connection>{};
  final _connectionsByProfileUrl = <Uri, Connection>{};
  final _listsForConnection = <String, List<GroupData>>{};

  int get length => _connectionsById.length;

  void clearCaches() {
    _connectionsById.clear();
    _connectionsByName.clear();
    _connectionsByProfileUrl.clear();
    _listsForConnection.clear();
  }

  bool addConnection(Connection connection) {
    if (_connectionsById.containsKey(connection.id)) {
      return false;
    }
    _connectionsById[connection.id] = connection;
    _connectionsByName[connection.name] = connection;
    _connectionsByProfileUrl[connection.profileUrl] = connection;

    return true;
  }

  bool addAllConnections(Iterable<Connection> newConnections) {
    bool result = true;

    for (final connection in newConnections) {
      result &= addConnection(connection);
    }

    return result;
  }

  Result<List<GroupData>, ExecError> getListsForUser(String id) {
    final result = _listsForConnection[id] ?? [];
    _refreshConnectionListData(id);
    return Result.ok(result);
  }

  Future<void> _refreshConnectionListData(String id) async {
    _logger.finest('Refreshing member list data for Connection $id');
    await getIt<AuthService>()
        .currentClient
        .andThenAsync((client) => client.getMemberGroupsForConnection(id))
        .match(
      onSuccess: (lists) {
        _listsForConnection[id] = lists;
        notifyListeners();
      },
      onError: (error) {
        _logger.severe('Error getting list data for $id: $error');
      },
    );
  }

  Result<Connection, String> getById(String id) {
    final result = _connectionsById[id];

    return result != null ? Result.ok(result) : Result.error('$id not found');
  }

  Result<Connection, String> getByName(String name) {
    final result = _connectionsByName[name];

    return result != null ? Result.ok(result) : Result.error('$name not found');
  }

  Result<Connection, String> getByProfileUrl(Uri url) {
    final result = _connectionsByProfileUrl[url];

    return result != null ? Result.ok(result) : Result.error('$url not found');
  }
}