private static async Task EmptyStateMessageHandlerAsync(string message, ChatState chatState)
        {
            switch (message)
            {
            case var m when m.ToLower().StartsWith("/infa"):
                await ChatStateOperations.UpdateChatStateAsync(chatState, State.InfaState);

                await Bot.SendTextMessageAsync(chatState.ChatId, "Какую инфу ты хочешь измерить?");

                break;

            case var m when m.ToLower().StartsWith("/when"):
                await ChatStateOperations.UpdateChatStateAsync(chatState, State.WhenState);

                await Bot.SendTextMessageAsync(chatState.ChatId, "Когда ...?");

                break;

            case var m1 when m1.ToLower().StartsWith("/start"):
            case var m2 when m2.ToLower().StartsWith("/help"):
                await Bot.SendTextMessageAsync(chatState.ChatId, "Какой вопрос тебя интересует?\n/Infa - инфаметр\n/When - датаметр");

                break;

            default:
                await Bot.SendRandomAnswer(chatState.ChatId);

                break;
            }
        }
        public static async void BotOnMessageReceived(object sender, MessageEventArgs messageEventArgs)
        {
            var message   = messageEventArgs.Message;
            var chatState = await ChatStateOperations.GetOrCreateChatStateAsync(message.Chat.Id);

            if (message == null || message.Type != MessageType.TextMessage)
            {
                return;
            }

            switch (chatState.State)
            {
            case State.Empty:
                await EmptyStateMessageHandlerAsync(message.Text, chatState);

                break;

            case State.InfaState:
                await ChatStateOperations.UpdateChatStateAsync(chatState, State.Empty);

                await Bot.SendInfametr(chatState.ChatId);

                break;

            case State.WhenState:
                await ChatStateOperations.UpdateChatStateAsync(chatState, State.Empty);

                await Bot.SendDatametr(chatState.ChatId);

                break;

            default:
                Log.Error($"Unknown chat state. ChatId: {message.Chat.Id}.");
                break;
            }

            Log.Info($"{message.From.Id}({message.From.FirstName} chat:{message.Chat.Id}): {message.Text} ({message.Date})");
        }