using System.Collections.Generic;
using System.Globalization;
using HelpdeskLib.Model;
using HelpdeskLib.Interfaces;
using HelpdeskLib.DataAcess;

namespace HelpdeskLib.Repositories
{
    class UserRepository : IUserRepository
    {
        //Extension method for ToTitleCase
        private static string toTitleCase(string text)
        {
            var ti = new CultureInfo("en-us", false).TextInfo;
            return ti.ToTitleCase(text.ToLower());
        }

        private static User mapToUser(UserToGroupDataModel user)
        {
            return new User
                       {
                           Username = user.UserName,
                           Name = new PersonName(toTitleCase(user.FirstName), toTitleCase(user.LastName)),
                           Email = user.EmailAddress,
                           IsManager = (user.Manager.HasValue) ? user.Manager.Value : false,
                           GroupName = user.GroupName
                       };
        }
        public IList<User> GetUsersByGroup(string groupName)
        {
            using (var db = new DevQuailHelpdeskDataContext())
            {
                return db.UserToGroups
                    .Where(u => u.GroupName == groupName)
                    .Select(mapToUser)
                    .ToList();
            }
        }
        public User GetUser(string userName)
        {
            using (var db = new DevQuailHelpdeskDataContext())
            {
                var user = db.UserToGroups.SingleOrDefault(x => x.UserName == userName);

                return user == null ? User.NULL : mapToUser(user);
            }
        }
    }
}