using System;
using System.Collections.Generic;
using System.Data;
using System.Text;
using Kreta.Core.Logic;
using Kreta.DataAccess.Interfaces;
using Kreta.DataAccessManual.Interfaces;
using Kreta.DataAccessManual.Util;
using Kreta.Enums;
using Kreta.Framework.Entities;
using Kreta.Framework.Util;
using SDA.DataProvider;
using SDA.Kreta.Entities;

namespace Kreta.DataAccessManual
{
    internal class LepEloadasJegyzekDal : DataAccessBase, ILepEloadasJegyzekDal
    {
        public LepEloadasJegyzekDal(DalHandler handler, GridParameters gridParameters) : base(handler, gridParameters)
        { }

        public LepEloadasJegyzekDal(DalHandler handler) : base(handler)
        { }

        #region BaseCRUD

        public ILepEloadasJegyzek Get()
        {
            return LepEloadasJegyzek.GiveAnInstance();
        }

        public ILepEloadasJegyzek Get(int id)
        {
            var entity = LepEloadasJegyzek.GiveAnInstance();
            entity.LoadByID(id);
            return entity;
        }

        public void Insert(ILepEloadasJegyzek dto)
        {
            var entity = dto as LepEloadasJegyzek;
            entity.Insert();
            dto.ID = entity.ID;
            DalHelper.Commit();
        }

        public void FullUpdate(ILepEloadasJegyzek dto)
        {
            var entity = dto as LepEloadasJegyzek;
            entity.FullUpdate(true);
            DalHelper.Commit();
        }

        public void Update(ILepEloadasJegyzek dto)
        {
            var entity = dto as LepEloadasJegyzek;
            entity.Update();
            DalHelper.Commit();
        }

        public void Delete(ILepEloadasJegyzek dto)
        {
            var entity = dto as LepEloadasJegyzek;
            entity.Delete();
            DalHelper.Commit();
        }

        #endregion

        public DataSet GetEloadasJegyzekek(int tanevId, int eloadasId, int felhasznaloId, bool isMindenEvfolyamJog, DateTime datum, int evfolyamId, string szervezetNev, string eloadasNev, DateTime kezdete, DateTime vege, string eloadasHelyszin)
        {
            var paramsList = new List<CommandParameter>()
            {
                new CommandParameter(nameof(tanevId), tanevId),
                new CommandParameter(nameof(eloadasId), eloadasId),
                new CommandParameter(nameof(felhasznaloId), felhasznaloId),
                new CommandParameter(nameof(isMindenEvfolyamJog), isMindenEvfolyamJog ? 1 : 0),
                new CommandParameter(nameof(datum), datum),
                new CommandParameter(nameof(evfolyamId), evfolyamId),
                new CommandParameter(nameof(szervezetNev), szervezetNev),
                new CommandParameter(nameof(eloadasNev), eloadasNev),
                new CommandParameter(nameof(kezdete), kezdete),
                new CommandParameter(nameof(vege), vege),
                new CommandParameter(nameof(eloadasHelyszin), eloadasHelyszin)
            };

            var command = new StringBuilder($@"
                SELECT
                  x.ID
                  ,x.EloadasId
                  ,x.Megjelent
                  ,x.TanuloId
                  ,x.TanuloNev
                    ,x.TanuloOktAzon
                    ,x.IntezmenyAzon
                    ,x.IntezmenyNev
                    ,x.OsztalyCsoportNev
                  ,x.isErasable
                    ,@{nameof(datum)} as datum
                    ,@{nameof(evfolyamId)} as EvfolyamId
                    ,@{nameof(szervezetNev)} as szervezetNev
                    ,@{nameof(eloadasNev)} as eloadasNev
                    ,@{nameof(kezdete)} as kezdete
                    ,@{nameof(vege)} as vege
                    ,@{nameof(eloadasHelyszin)} as eloadasHelyszin
                    ,x.GondviseloElfogadas
                FROM (
                  SELECT DISTINCT
                    ROW_NUMBER() OVER (PARTITION BY fh.ID ORDER BY IIF((@{nameof(isMindenEvfolyamJog)} = 1 or o.ID is not null or cs.ID is not null), 'T', 'F') desc) rn
                    ,e.ID as ID
                    ,e.C_ELOADASID as EloadasId
                    ,e.C_MEGJELENT as Megjelent
                    ,e.C_FELHASZNALOID as TanuloId
                    ,fh.C_NYOMTATASINEV as TanuloNev
                        ,fh.C_OKTATASIAZONOSITO as TanuloOktAzon
                        ,i.C_AZONOSITO as IntezmenyAzon
                        ,ia.C_NEV as IntezmenyNev
                        ,y.Osztalynev as OsztalyCsoportNev
                        ,e.C_GONDVISELOALTALENGEDELYEZVE as GondviseloElfogadas
                    ,IIF(( @{nameof(isMindenEvfolyamJog)} = 1 or o.ID is not null or cs.ID is not null), 'T', 'F') as isErasable
                  FROM T_LEPELOADASJEGYZEK_OSSZES e
                  INNER JOIN T_FELHASZNALO_OSSZES fh ON fh.ID = e.C_FELHASZNALOID AND fh.TOROLT = 'F'
                    INNER JOIN T_INTEZMENYADATOK_OSSZES ia on ia.C_INTEZMENYID = fh.C_INTEZMENYID and ia.C_TANEVID = fh.C_TANEVID and ia.TOROLT = 'F'
                    INNER JOIN T_INTEZMENY_OSSZES i on i.ID = fh.C_INTEZMENYID and i.TOROLT = 'F'
                  INNER JOIN T_TANULOCSOPORT tcs ON tcs.C_TANULOID = fh.ID AND tcs.TOROLT = 'F'
                    CROSS APPLY fnGetTanuloOsztalyString(e.C_FELHASZNALOID, @datum,default,default,default, NULL) y
                    LEFT JOIN T_OSZTALY tanuloOsztaly on tanuloOsztaly.ID = tcs.C_OSZTALYCSOPORTID and tanuloOsztaly.TOROLT = 'F'
                  LEFT JOIN T_OSZTALY o on o.ID = tcs.C_OSZTALYCSOPORTID and o.TOROLT = 'F' and (o.C_OSZTALYFONOKID = @{nameof(felhasznaloId)} or o.C_OFOHELYETTESID = @{nameof(felhasznaloId)})
                  LEFT JOIN T_CSOPORT cs on cs.ID = tcs.C_OSZTALYCSOPORTID and cs.TOROLT = 'F' and cs.C_CSOPORTVEZETOID = @{nameof(felhasznaloId)}
                  WHERE e.TOROLT = 'F'
                    AND e.C_TANEVID = @{nameof(tanevId)}
                    AND e.C_ELOADASID = @{nameof(eloadasId)}
                ) AS x
                WHERE
                  rn = 1
            ");

            return GetData(command.ToString(), paramsList);
        }

        public DataSet GetTanulokForEloadas(int tanevId, int eloadasId, int evfolyamId, string filter, int? osztfoId = null)
        {
            var paramsList = new List<CommandParameter>()
            {
                new CommandParameter(nameof(tanevId), tanevId),
                new CommandParameter(nameof(eloadasId), eloadasId),
                new CommandParameter(nameof(evfolyamId), evfolyamId)
            };
            var command = new StringBuilder($@"
            SELECT DISTINCT
                t.ID as TanuloId,
                fh.C_NYOMTATASINEV as TanuloNev
            FROM T_TANULO_OSSZES t
            INNER JOIN T_FELHASZNALO_OSSZES fh ON fh.ID = t.ID
              AND fh.C_NYOMTATASINEV LIKE '%{filter}%'
              AND fh.C_TANEVID = t.C_ALTANEVID
              AND fh.TOROLT = 'F'
            INNER JOIN T_TANULOCSOPORT_OSSZES tcs ON tcs.C_TANULOID = t.ID
              AND tcs.C_TANEVID = t.C_ALTANEVID
              AND tcs.TOROLT = 'F'
            INNER JOIN T_OSZTALYCSOPORT_OSSZES ocs ON ocs.ID = tcs.C_OSZTALYCSOPORTID
              AND ocs.C_EVFOLYAMTIPUSA = @{nameof(evfolyamId)}
              AND ocs.C_TANEVID = t.C_ALTANEVID
              AND ocs.TOROLT = 'F'
              AND NOT EXISTS(
                SELECT TOP 1 ID
                FROM T_LEPELOADASJEGYZEK_OSSZES eaj
                WHERE eaj.C_FELHASZNALOID = t.ID
                  AND eaj.C_ELOADASID =  @{nameof(eloadasId)}
                  AND eaj.C_TANEVID = t.C_ALTANEVID
                  AND eaj.TOROLT = 'F')" + (osztfoId.HasValue ? $@"
            LEFT JOIN T_OSZTALY o ON o.ID=ocs.ID AND (o.C_OSZTALYFONOKID= " + osztfoId.ToString() + @" OR o.C_OFOHELYETTESID = " + osztfoId.ToString() + @")
          LEFT JOIN T_CSOPORT cs ON cs.ID=ocs.ID AND (" + osztfoId.ToString() + @" IS NULL OR cs.C_CSOPORTVEZETOID=" + osztfoId.ToString() + @")" : "") + $@"
            WHERE t.C_ALTANEVID = @{nameof(tanevId)} AND t.TOROLT = 'F' " + (osztfoId.HasValue ? $@"AND NOT (o.ID IS NULL AND cs.ID IS NULL)" : "") + $@"
            ORDER BY fh.C_NYOMTATASINEV
            ");

            return GetData(command.ToString(), paramsList);
        }

        public DataSet GetOsztalyokForEloadas(int tanevId, int eloadasId, int evfolyamId, int? osztfoId = null)
        {
            var paramsList = new List<CommandParameter>()
            {
                new CommandParameter(nameof(tanevId), tanevId),
                new CommandParameter(nameof(evfolyamId), evfolyamId),
            };

            var command = new StringBuilder($@"
                select
                  ocs.ID as Id
                    ,ocs.C_NEV as Nev
                from T_OSZTALYCSOPORT ocs
                join T_OSZTALY o on o.ID = ocs.ID and o.TOROLT = 'F'
                where
                  ocs.C_EVFOLYAMTIPUSA = @{nameof(evfolyamId)}
                    and ocs.C_TANEVID = @{nameof(tanevId)}
                  and ocs.TOROLT = 'F' "
                + (osztfoId.HasValue ? $@" and (o.C_OSZTALYFONOKID = " + osztfoId.ToString() + " or C_OFOHELYETTESID = " + osztfoId.ToString() + " ) " : "")
                + " order by ocs.C_NEV"
            );

            return GetData(command.ToString(), paramsList);
        }

        public DataSet GetJelentkeztetettOsztalyokIdForEloadas(int tanevId, int eloadasId, int? osztalyFonokId = null)
        {
            var paramsList = new List<CommandParameter>()
            {
                new CommandParameter("pTanevId", tanevId),
                new CommandParameter("pEloadasId", eloadasId),
            };

            var command = new StringBuilder($@"
                SELECT o.ID
                FROM T_OSZTALY_OSSZES o
                WHERE o.TOROLT = 'F'
                    AND EXISTS(
                        SELECT *
                        FROM T_LEPELOADASJEGYZEK_OSSZES lj
                            INNER JOIN T_TANULOCSOPORT_OSSZES tcs ON tcs.C_TANULOID = lj.C_FELHASZNALOID
                        WHERE lj.C_TANEVID = :pTanevId
                            AND lj.C_ELOADASID = :pEloadasId
                            AND lj.TOROLT = 'F'
                            AND tcs.TOROLT = 'F'
                            AND tcs.C_TANULOID = lj.C_FELHASZNALOID
                            AND tcs.C_OSZTALYCSOPORTID = o.ID
                    )
                "
                + (osztalyFonokId.HasValue ? $@" AND (o.C_OSZTALYFONOKID = " + osztalyFonokId.ToString() + " OR C_OFOHELYETTESID = " + osztalyFonokId.ToString() + " ) " : "")
            );

            return GetData(command.ToString(), paramsList);

        }

        public DataSet GetTanuloEloadasai(int felhasznaloId)
        {
            var paramsList = new List<CommandParameter>()
            {
                new CommandParameter(nameof(felhasznaloId), felhasznaloId)
            };
            var command = new StringBuilder($@"
              SELECT DISTINCT
                e.C_ELOADASID as EloadasId
                    ,e.C_GONDVISELOALTALENGEDELYEZVE as GondviseloElfogadas
                    ,e.C_MEGJELENT as Megjelent
              FROM T_LEPELOADASJEGYZEK_OSSZES e
              WHERE e.TOROLT = 'F'
                AND e.C_FELHASZNALOID = @{nameof(felhasznaloId)}
                AND e.TOROLT = 'F'
            ");

            return GetData(command.ToString(), paramsList, booleanColumns: "Megjelent");
        }

        public DataSet GetEloadasJelentkezesEmailData(int id)
        {
            var paramsList = new List<CommandParameter>()
            {
                new CommandParameter(nameof(id), id)
            };

            var command = new StringBuilder($@"
                select
                    f.ID as TanuloId
                ,f.C_NYOMTATASINEV as Nev
                ,f.C_NYOMTATASINEV as TanuloNev
                ,y.Osztalynev as TanuloOsztalyNev
                ,ISNULL(ia.C_NEV, '-') as IntezmenyNev
                ,ISNULL(ia.C_EMAILCIM, '-') as IntezmenyEmail
                ,e.C_EMAILCIM as EmailCim
              from T_LEPELOADASJEGYZEK ej
              join T_FELHASZNALO f on f.ID = ej.C_FELHASZNALOID and f.TOROLT = 'F'
              CROSS APPLY fnGetTanuloOsztalyString(ej.C_FELHASZNALOID, GETDATE(),default,default,default, NULL) y
              join T_EMAIL e on e.C_FELHASZNALOID = ej.C_FELHASZNALOID and e.TOROLT = 'F'
              join T_INTEZMENYADATOK ia on ia.C_INTEZMENYID = ej.C_INTEZMENYID and ia.C_TANEVID = ej.C_TANEVID
              where
                ej.C_ELOADASID = @{nameof(id)} and ej.TOROLT = 'F' and e.C_GONDVISELOID is null
            union
              select
                    g.C_TANULOID as TanuloId
                ,g.C_NEV
                ,f.C_NYOMTATASINEV as TanuloNev
                ,y.Osztalynev as TanuloOsztalyNev
                ,ISNULL(ia.C_NEV, '-') as IntezmenyNev
                ,ISNULL(ia.C_EMAILCIM, '-') as IntezmenyEmail
                ,e.C_EMAILCIM as EmailCim
              from T_LEPELOADASJEGYZEK ej
              join T_GONDVISELO g on g.C_TANULOID = ej.C_FELHASZNALOID and g.TOROLT = 'F'
              join T_FELHASZNALO f on f.ID = ej.C_FELHASZNALOID and f.TOROLT = 'F'
              CROSS APPLY fnGetTanuloOsztalyString(ej.C_FELHASZNALOID, GETDATE(),default,default,default, NULL) y
              join T_EMAIL e on e.C_GONDVISELOID = g.ID and e.TOROLT = 'F' AND e.C_ALAPERTELMEZETT = 'T'
              join T_INTEZMENYADATOK ia on ia.C_INTEZMENYID = ej.C_INTEZMENYID and ia.C_TANEVID = ej.C_TANEVID
              where
                ej.C_ELOADASID = @{nameof(id)} and ej.TOROLT = 'F'
            ");

            return GetData(command.ToString(), paramsList);
        }

        public DataSet GetEloadasLemondasEmailData(int id)
        {
            var paramsList = new List<CommandParameter>()
            {
                new CommandParameter(nameof(id), id)
            };

            var command = new StringBuilder($@"
                select
                    f.ID as TanuloId
                ,f.C_NYOMTATASINEV as Nev
                ,f.C_NYOMTATASINEV as TanuloNev
                ,y.Osztalynev as TanuloOsztalyNev
                ,ia.C_NEV as IntezmenyNev
                ,ia.C_EMAILCIM as IntezmenyEmail
                ,e.C_EMAILCIM as EmailCim
              from T_LEPELOADASJEGYZEK_OSSZES ej
              join T_FELHASZNALO f on f.ID = ej.C_FELHASZNALOID and f.TOROLT = 'F'
              CROSS APPLY fnGetTanuloOsztalyString(ej.C_FELHASZNALOID, GETDATE(),default,default,default, NULL) y
              join T_EMAIL e on e.C_FELHASZNALOID = ej.C_FELHASZNALOID and e.TOROLT = 'F'
              join T_INTEZMENYADATOK ia on ia.C_INTEZMENYID = ej.C_INTEZMENYID and ia.C_TANEVID = ej.C_TANEVID
              where
                ej.ID = @{nameof(id)} and e.C_GONDVISELOID is null
            union
              select
                    g.C_TANULOID as TanuloId
                ,g.C_NEV
                ,f.C_NYOMTATASINEV as TanuloNev
                ,y.Osztalynev as TanuloOsztalyNev
                ,ia.C_NEV as IntezmenyNev
                ,ia.C_EMAILCIM as IntezmenyEmail
                ,e.C_EMAILCIM as EmailCim
              from T_LEPELOADASJEGYZEK_OSSZES ej
              join T_GONDVISELO g on g.C_TANULOID = ej.C_FELHASZNALOID and g.TOROLT = 'F'
              join T_FELHASZNALO f on f.ID = ej.C_FELHASZNALOID and f.TOROLT = 'F'
              CROSS APPLY fnGetTanuloOsztalyString(ej.C_FELHASZNALOID, GETDATE(),default,default,default, NULL) y
              join T_EMAIL e on e.C_GONDVISELOID = g.ID and e.TOROLT = 'F' AND e.C_ALAPERTELMEZETT = 'T'
              join T_INTEZMENYADATOK ia on ia.C_INTEZMENYID = ej.C_INTEZMENYID and ia.C_TANEVID = ej.C_TANEVID
              where
                ej.ID = @{nameof(id)}
            ");

            return GetData(command.ToString(), paramsList);
        }

        public int GetTorlendoTanuloSzam(int intezmenyId, int tanevId, int eloadasId, int osztalyId)
        {
            var paramsList = new List<CommandParameter>()
            {
                new CommandParameter(nameof(intezmenyId), intezmenyId),
                new CommandParameter(nameof(tanevId), tanevId),
                new CommandParameter(nameof(eloadasId), eloadasId),
                new CommandParameter(nameof(osztalyId), osztalyId)
            };

            var command = new StringBuilder($@"
                select
                    count(1) as TorlendoDiakSzam
                from T_TANULOCSOPORT tcs
                join T_LEPELOADASJEGYZEK ej on ej.C_FELHASZNALOID = tcs.C_TANULOID and ej.C_ELOADASID = @{nameof(eloadasId)} and ej.TOROLT = 'F'
                where
                  tcs.C_OSZTALYCSOPORTID = @{nameof(osztalyId)} and tcs.C_INTEZMENYID = @{nameof(intezmenyId)} and tcs.C_TANEVID = @{nameof(tanevId)}
            ");

            var data = GetData(command.ToString(), paramsList);
            return data.Tables[0].Rows[0].Field<int>("TorlendoDiakSzam");
        }

        public void DeleteTanulokForEloadasByOsztaly(int intezmenyId, int tanevId, int eloadasId, int osztalyId)
        {
            string commandText = @"
                update ej
                set
                    TOROLT = 'T'
                from T_LEPELOADASJEGYZEK ej
                join T_TANULOCSOPORT tcs on tcs.C_TANULOID = ej.C_FELHASZNALOID and ej.C_ELOADASID = :pEloadasId and tcs.C_OSZTALYCSOPORTID = :pOsztalyId and tcs.TOROLT = 'F'
                where
                    C_ELOADASID = :pEloadasId and ej.C_INTEZMENYID = :pIntezmenyId and ej.C_TANEVID = :pTanevId
            ";

            using (SDACommand command = DAUtil.CreateCommand(commandText))
            {
                command.Parameters.Add("pIntezmenyId", SDADBType.Int).Value = intezmenyId;
                command.Parameters.Add("pTanevId", SDADBType.Int).Value = tanevId;
                command.Parameters.Add("pEloadasId", SDADBType.Int).Value = eloadasId;
                command.Parameters.Add("pOsztalyId", SDADBType.Int).Value = osztalyId;
                command.ExecuteNonQuery();

                DalHelper.Commit();
            }
        }

        public bool SaveGondviseloEngedelyezes(int intezmenyId, int tanevId, int eloadasId, int tanuloId, int gondviseloId, string dontes)
        {
            string commandText = @"
                update ej
                set
                     C_GONDVISELOALTALENGEDELYEZVE = :pDontes
                    ,C_GONDVISELOID = :pGondviseloId
                    ,SERIAL += 1
                    ,LASTCHANGED = GETDATE()
                    ,MODIFIER = :pGondviseloId
                from T_LEPELOADASJEGYZEK ej
                where
                    C_ELOADASID = :pEloadasId and ej.C_INTEZMENYID = :pIntezmenyId and ej.C_TANEVID = :pTanevId
                    and C_FELHASZNALOID = :pTanuloId
            ";

            using (SDACommand command = DAUtil.CreateCommand(commandText))
            {
                command.Parameters.Add("pIntezmenyId", SDADBType.Int).Value = intezmenyId;
                command.Parameters.Add("pTanevId", SDADBType.Int).Value = tanevId;
                command.Parameters.Add("pEloadasId", SDADBType.Int).Value = eloadasId;
                command.Parameters.Add("pGondviseloId", SDADBType.Int).Value = gondviseloId;
                command.Parameters.Add("pTanuloId", SDADBType.Int).Value = tanuloId;
                command.Parameters.Add("pDontes", SDADBType.String).Value = dontes;
                var result = command.ExecuteNonQuery() == 1;

                DalHelper.Commit();

                return result;
            }
        }

        public DataSet GetTanulokForEloadasWithMegjelent(int eloadasId, DateTime eloadasDatum)
        {
            var paramsList = new List<CommandParameter>()
            {
                new CommandParameter(nameof(eloadasId), eloadasId),
                new CommandParameter(nameof(eloadasDatum), eloadasDatum),
                new CommandParameter("oktNevelesiKategoriaId", (int)OktNevelesiKategoriaEnum.NevelesOktatas)
            };

            var command = new StringBuilder($@"
                select distinct
                  x.EvfolyamTipusId as EvfolyamId
                    ,dic.C_NAME as EvfolyamNev
                  ,x.ID as OsztalyId
                  ,x.OsztalyNev as OsztalyNev
                  ,ej.C_MEGJELENT as Megjelent
                  ,ej.C_FELHASZNALOID as TanuloId
                    ,ej.TOROLT as Torolt
                from T_LEPELOADASJEGYZEK_OSSZES ej
                CROSS APPLY fnGetTanuloOsztaly(ej.C_FELHASZNALOID, @{nameof(eloadasDatum)},@oktNevelesiKategoriaId,default,default) x
                LEFT JOIN T_DICTIONARYITEMBASE dic on dic.ID = x.EvfolyamTipusId and dic.C_INTEZMENYID = ej.C_INTEZMENYID and dic.C_TANEVID = ej.C_TANEVID
                where
                  ej.C_ELOADASID = @{nameof(eloadasId)} --and ej.TOROLT = 'F'
            ");

            return GetData(command.ToString(), paramsList);
        }

        public DataSet GetEloadasokTanuloinakOsszesitoje(int tanevId, List<int> osztalyIdList, int oktNevKategoria)
        {
            string osztalySzures = string.Empty;
            if (osztalyIdList?.Count > 0)
            {
                osztalySzures = string.Format("AND tcs.C_OSZTALYCSOPORTID IN ({0})", SqlLogic.ParseListToParameter(osztalyIdList));
            }

            string oktNevKategoriaSzures = string.Empty;
            if (oktNevKategoria > 0)
            {
                oktNevKategoriaSzures = string.Format("AND ocs.C_FELADATKATEGORIAID = {0}", oktNevKategoria);
            }

            var paramsList = new List<CommandParameter>()
            {
                new CommandParameter(nameof(tanevId), tanevId)
            };

            var command = new StringBuilder($@"
                SELECT DISTINCT
                     f.C_NYOMTATASINEV AS 'Diák neve'
                    ,f.C_OKTATASIAZONOSITO AS 'Oktatási azonosítója'
                    ,ocs.C_NEV AS 'Osztálya'
                    ,IIF(lej.C_MEGJELENT = 'T', 'Igen', 'Nem') AS 'Volt-e LEP előadáson az adott évben'
                FROM T_TANULO_OSSZES t
                    INNER JOIN T_FELHASZNALO_OSSZES f ON f.ID = t.ID AND f.C_TANEVID = @{nameof(tanevId)} AND f.TOROLT = 'F'
                    INNER JOIN T_TANULOCSOPORT_OSSZES tcs ON tcs.C_TANULOID = t.ID {osztalySzures} AND tcs.TOROLT = 'F'
                    INNER JOIN T_OSZTALYCSOPORT_OSSZES ocs ON ocs.ID = tcs.C_OSZTALYCSOPORTID {oktNevKategoriaSzures} AND ocs.TOROLT = 'F'
                    INNER JOIN T_OSZTALY_OSSZES o ON o.ID = ocs.ID AND o.TOROLT = 'F'
                    LEFT JOIN T_LEPELOADASJEGYZEK_OSSZES lej ON lej.C_FELHASZNALOID = f.ID AND lej.C_MEGJELENT = 'T' AND lej.TOROLT = 'F'
                ORDER BY ocs.C_NEV
            ");

            return GetData(command.ToString(), paramsList);
        }

        public void DeleteTanulokByEloadasId(int tanevId, int eloadasId)
        {
            // NOTE: A MODIFIER = -13 azt jelenti, hogy KTR törölt, de a törlést mi írjuk az intézményi DB-be.
            string commandText = @"
                UPDATE ej
                SET
                     TOROLT = 'T'
                    ,SERIAL += 1
                    ,LASTCHANGED = GETDATE()
                    ,MODIFIER = -13
                FROM T_LEPELOADASJEGYZEK_OSSZES ej
                WHERE C_ELOADASID = :pEloadasId 
                    AND ej.C_TANEVID = :pTanevId
                    AND ej.TOROLT = 'F'

                UPDATE e
                SET
                     TOROLT = 'T'
                    ,SERIAL += 1
                    ,LASTCHANGED = GETDATE()
                    ,MODIFIER = -13
                FROM T_LEPELOADAS_OSSZES e
                WHERE C_ELOADASID = :pEloadasId 
                    AND e.C_TANEVID = :pTanevId
                    AND e.TOROLT = 'F'
            ";

            using (SDACommand command = DAUtil.CreateCommand(commandText))
            {
                command.Parameters.Add("pTanevId", SDADBType.Int).Value = tanevId;
                command.Parameters.Add("pEloadasId", SDADBType.Int).Value = eloadasId;
                command.ExecuteNonQuery();

                DalHelper.Commit();
            }
        }
    }
}