using System;
using System.Linq;
using System.Collections.Generic;
using NHibernate;
using Tanshu.Accounts.Entities.Auth;


namespace Tanshu.Accounts.Repository
{
    public class UserBI : UnitOfWork<User>
    {
        public IList<Group> GroupList()
        {
            return _session.QueryOver<Group>()
                   .OrderBy(x => x.Name).Asc
                   .List();
        }
        public IList<User> GetFilteredUsers(Dictionary<string, string> filter)
        {
            return _session.QueryOver<User>()
                .WhereRestrictionOn(x => x.Name).IsLike(string.Format("%{0}%", filter["Name"]))
                .List();
        }
        public bool ChangePassword(User userData, string newPassword)
        {
            var dbUser = Get(x => x.Name == userData.Name && x.Password == userData.Password);
            if (dbUser == null)
                return false;
            dbUser.Password = newPassword;
            _session.Update(dbUser);
            return true;
        }
        public User ValidateUser(string name, string password)
        {
            return Get(x => x.Name == name && x.Password == password);
        }
        public User MsrValidateUser(string msrString)
        {
            return Get(x => x.MsrString == msrString);
        }
        public IList<User> ListActive(DateTime startDate, DateTime finishDate)
        {
            const string query = @"
select distinct(u) from Voucher v
inner join v.User u
where v.Date >= :startDate and v.Date <= :finishDate
order by u.Name";
            return _session.CreateQuery(query)
                .SetParameter("startDate", startDate)
                .SetParameter("finishDate", finishDate)
                .List<User>();
        }
        public void Update(User user, IEnumerable<Group> selectedGroups)
        {
            var roles = new Dictionary<Group, bool>();
            foreach (var item in GroupList())
            {
                roles.Add(item, selectedGroups.Any(x => x.GroupID == item.GroupID));
            }
            foreach (var item in roles)
            {
                var id = item.Key.GroupID;
                var ug = user.UserGroups.SingleOrDefault(x => x.Group.GroupID == id);
                if (item.Value && ug == null)
                {
                    var rg = new UserGroup() { User = user, Group = item.Key };
                    _session.Save(rg);
                }
                else if (!item.Value && ug != null)
                {
                    user.UserGroups.Remove(ug);
                    _session.Delete(ug);
                }
            }
        }
        public bool IsUserInRole(Guid userID, string roleName)
        {
            var user = _session.QueryOver<User>()
                .Where(x => x.UserID == userID)
                .SingleOrDefault();
            return user.UserGroups.SelectMany(x => x.Group.RoleGroups).Any(y=>y.Role.Name == roleName);
        }
    }
}