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 new IList<User> List()
        {
            return _session.QueryOver<User>()
                .OrderBy(x => x.Name).Asc
                .List<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 void ChangePassword(User user, string password)
        {
            user.Password = Tanshu.Common.Md5.Hash(password, "v2");
            _session.Update(user);
        }
        public User ValidateUser(string name, string password)
        {
            password = Tanshu.Common.Md5.Hash(password, "v2");
            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 IList<Role> Roles(Guid userID)
        {
            const string query = @"
select distinct(r) from UserGroup ug
inner join ug.User u
inner join ug.Group g
inner join g.RoleGroups rg
inner join rg.Role r
where u.UserID = :userID
order by r.Name";
            return _session.CreateQuery(query)
                .SetParameter("userID", userID)
                .List<Role>();
        }
    }
}