using System;
using System.Threading.Tasks;
using Flexitime.Objects;
using FlexitimeAPI.Exceptions;
using FlexitimeAPI.Interfaces;

namespace FlexitimeAPI.Services
{
    public class IdentifierService : IIdentifierService
    {
        private readonly IUserService _userService;

        public IdentifierService(IUserService userService)
        {
            _userService = userService;
        }

        public async Task Associate(Identifier identifier, Guid userId)
        {
            var user = await _userService.GetById(userId);

            if (user == null)
            {
                throw new InvalidUserIdException(userId);
            }

            user.AssociatedIdentifiers.Add(identifier);
            await _userService.Update(user);
        }
    }
}