// GET: Leagues/AddTeams
        public IActionResult AddTeams(int leagueId)
        {
            var league = _leaguesService.GetLeague(leagueId);

            //if he's not admin he can't add teams
            if (!league.LeagueAdminEmails.Contains(User.Identity.Name))
            {
                _logger.LogWarning("User with email - " + User?.Identity?.Name + " tried to edit league with id " + leagueId);
                return(NotFound());
            }
            AddTeamsViewModel model = new AddTeamsViewModel()
            {
                LeagueId     = leagueId,
                League       = league,
                CurrentTeams = league.Teams.Select(x => new Models.TeamViewModels.TeamDetailsViewModel()
                {
                    TeamName = x.Name,
                    TeamId   = x.Id
                }).ToList()
            };

            model.TeamsToSelect = _teamsService.GetTeamsThatAreNotInLeague(leagueId).Select(x => new Models.TeamViewModels.TeamDetailsViewModel()
            {
                TeamName = x.Name,
                TeamId   = x.Id
            }).ToList();

            return(View("AddTeams", model));
        }
        public async Task <IActionResult> AddTeams(AddTeamsViewModel model)
        {
            var league = _leaguesService.GetLeague(model.LeagueId);

            if (!league.LeagueAdminEmails.Contains(User.Identity.Name))
            {
                return(NotFound());
            }
            if (string.IsNullOrEmpty(model.SelectedTeamIds))
            {
                ModelState.AddModelError("AddingTeamsNumber", "Morate označiti barem jedan tim kojeg želite dodati.");
                model.League        = league;
                model.TeamsToSelect = _teamsService.GetTeamsThatAreNotInLeague(league.Id).Select(x => new TeamDetailsViewModel()
                {
                    TeamId   = x.Id,
                    TeamName = x.Name
                }).ToList();
                return(View(model));
            }
            var teamIdsString = model.SelectedTeamIds.Split(',').ToList();

            var teamIds = teamIdsString.Select(x => int.Parse(x)).ToList();

            await _leaguesService.AddTeamsToLeague(teamIds, model.LeagueId);

            return(RedirectToAction(nameof(Details), new { id = model.LeagueId }));
        }