using Grpc.Core;
using JOBot.Proto;
using JOBot.TClient.Infrastructure.Exceptions;
using Telegram.Bot;
using Telegram.Bot.Types;
using User = JOBot.Proto.User;

namespace JOBot.TClient.Services;

public class UserService(ITelegramBotClient bot, User.UserClient userClient)
{
    /// <summary>
    ///     Get user
    /// </summary>
    /// <param name="update">Telegram Update object</param>
    /// <param name="ct">Cancellation Token</param>
    /// <returns>RPC User Response or null if user not exists</returns>
    /// <exception cref="FallbackException">If something in server logic went wrong</exception>
    /// <exception cref="ArgumentNullException">If update.Message is null</exception>
    public async Task<GetUserResponse?> GetUser(Update update, CancellationToken ct = default)
    {
        ArgumentNullException.ThrowIfNull(update.Message?.From);

        GetUserResponse? user;
        try
        {
            user = await userClient.GetUserAsync(new GetUserRequest() //Получаем пользователя
            {
                UserId = update.Message.From.Id
            });
        }
        catch (RpcException e) //Пользователь не найден?
        {
            if (e.StatusCode != StatusCode.NotFound)
                throw new FallbackException(TextResource.FallbackMessage, update.Message, bot);

            return null;
        }

        return user;
    }
}