using System;
using System.Collections.Generic;
//using System.Linq;
using System.Text;
using System.Data.SqlClient;
using Tanshu.Accounts.Contracts;
using Tanshu.Data.DAO;
using Tanshu.Accounts.SqlDAO;
using Tanshu.Accounts.Entities;
using Tanshu.Accounts.Entities.Auth;
using NHibernate.Criterion;
using NHibernate.Linq;
using NHibernate;

namespace Tanshu.Accounts.Repository
{
    public static class MembershipBI
    {

        //public string[] GetAllRoles()
        //{
        //    using (var session = SessionManager.Session)
        //    {
        //        var roleList = session.CreateCriteria<Role>().List<Role>();
        //        string[] list = new string[roleList.Count];
        //        for (int i = 0; i < list.Length; i++)
        //        {
        //            list[i] = roleList[i].Name;
        //        }
        //        return list;
        //    }
        //}

        //public string[] GetRolesForUser(string username)
        //{
        //    using (var session = SessionManager.Session)
        //    {
        //        var user = session.CreateCriteria<User>()
        //            .Add(Restrictions.Eq("Name", username))
        //            .UniqueResult<User>();

        //        List<string> roles = new List<string>();
        //        foreach (var group in user.Groups)
        //        {
        //            foreach (var item in group.RoleGroups)
        //            {
        //                roles.Add(item.Role.Name);
        //            }
        //        }
        //        return roles.ToArray();
        //    }
        //}

        //public bool IsUserInRole(string username, string roleName)
        //{
        //    using (var session = SessionManager.Session)
        //    {
        //        var user = session.CreateCriteria<User>()
        //            .Add(Restrictions.Eq("Name", username))
        //            .UniqueResult<User>();
        //        return IsUserInRole(user.UserID, roleName);
        //    }
        //}

        public static bool IsUserInRole(int userID, string roleName)
        {
            string query = @"
SELECT COUNT(*) AS Role_Count FROM
Auth_UserGroups ug INNER JOIN Auth_RoleGroups rg ON ug.GroupID = rg.GroupID
INNER JOIN Auth_Roles r ON rg.RoleID = r.RoleID
WHERE ug.UserID = :UserID AND r.Name = :Role;";
            using (var session = SessionManager.Session)
            {
                return session
                    .CreateSQLQuery(query)
                    .AddScalar("Role_Count", NHibernateUtil.Int32)
                    .SetInt32("UserID", userID)
                    .SetString("Role", roleName)
                    .UniqueResult<int>() > 0;
            }
        }
        #region UserGroup
        public static IList<Group> GetGroups()
        {
            using (var session = SessionManager.Session)
            {
                return session.CreateCriteria<Group>()
                    .List<Group>();
            }
        }
        public static IList<Group> GetGroupsOfUser(int userID)
        {
            using (var session = SessionManager.Session)
            {
                string query = "select ug.Group from UserGroup ug where ug.User.UserID = :userID";
                var list = session.CreateQuery(query)
                .SetParameter("userID", userID)
                .List<Group>();
                foreach (var item in list)
                    NHibernateUtil.Initialize(item);
                return list;
            }
        }
        public static IList<Group> GetGroupsNotOfUser(int userID)
        {
            using (var session = SessionManager.Session)
            {
                string query = "select g from Group g where g not in (select ug.Group from UserGroup ug where ug.User.UserID = :userID)";
                var list = session.CreateQuery(query)
                .SetParameter("userID", userID)
                .List<Group>();
                foreach (var item in list)
                    NHibernateUtil.Initialize(item);
                return list;
            }
        }
        public static void AddUserToGroup(int userID, int groupID)
        {
            using (var session = SessionManager.Session)
            {
                var userGroup = session.CreateQuery("select count(*) from UserGroup ug where ug.User.UserID = :userID and ug.Group.GroupID = :groupID")
                    .SetParameter("userID", userID)
                    .SetParameter("groupID", groupID)
                    .UniqueResult<long>();
                if (userGroup == 0)
                {
                    var user = session.Get<User>(userID);
                    var group = session.Get<Group>(groupID);
                    session.Save(new UserGroup() { User = user, Group = group });
                }
            }
        }
        public static void RemoveUserFromGroup(int userID, int groupID)
        {
            using (var session = SessionManager.Session)
            {
                string query = "delete UserGroup ug where ug.User.UserID = :userID and ug.Group.GroupID = :groupID";
                session.CreateQuery(query)
                .SetParameter("userID", userID)
                .SetParameter("groupID", groupID)
                .ExecuteUpdate();
            }
        }
        #endregion
        #region RoleGroup
        public static IList<Role> GetRoles()
        {
            using (var session = SessionManager.Session)
            {
                return session.CreateCriteria<Role>()
                    .List<Role>();
            }
        }
        public static IList<Role> GetRolesOfGroup(int groupID)
        {
            using (var session = SessionManager.Session)
            {
                string query = "select rg.Role from RoleGroup rg where rg.Group.GroupID = :groupID";
                var list = session.CreateQuery(query)
                .SetParameter("groupID", groupID)
                .List<Role>();
                foreach (var item in list)
                    NHibernateUtil.Initialize(item);
                return list;
            }
        }
        public static IList<Role> GetRolesNotOfGroup(int groupID)
        {
            using (var session = SessionManager.Session)
            {
                string query = "select r from Role r where r not in (select rg.Role from RoleGroup rg where rg.Group.GroupID = :groupID)";
                var list = session.CreateQuery(query)
                .SetParameter("groupID", groupID)
                .List<Role>();
                foreach (var item in list)
                    NHibernateUtil.Initialize(item);
                return list;
            }
        }
        public static void AddRoleToGroup(int roleID, int groupID)
        {
            using (var session = SessionManager.Session)
            {
                var roleGroup = session.CreateQuery("select count(*) from RoleGroup rg where rg.Role.RoleID = :roleID and rg.Group.GroupID = :groupID")
                  .SetParameter("roleID", roleID)
                  .SetParameter("groupID", groupID)
                  .UniqueResult<long>();
                if (roleGroup == 0)
                {
                    var role = session.Get<Role>(roleID);
                    var group = session.Get<Group>(groupID);
                    session.Save(new RoleGroup() { Role = role, Group = group });
                }
            }
        }
        public static void RemoveRoleFromGroup(int roleID, int groupID)
        {
            using (var session = SessionManager.Session)
            {
                string query = "delete RoleGroup rg where rg.Role.RoleID = :roleID and rg.Group.GroupID = :groupID";
                session.CreateQuery(query)
                .SetParameter("roleID", roleID)
                .SetParameter("groupID", groupID)
                .ExecuteUpdate();
            }
        }
        #endregion


    }
}