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

namespace Kreta.DataAccessManual
{
    internal class TantervDAL : DataAccessBase, ITantervDAL
    {
        public TantervDAL(DalHandler handler, GridParameters parameters) : base(handler, parameters)
        {
        }

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

        public DataSet GetAktivTantervek(int? tanevId = null)
        {
            var paramsList = new List<CommandParameter>();

            var commandText = new StringBuilder(@"
SELECT ID, C_NEV Nev
FROM T_TANTERV_OSSZES
WHERE TOROLT = 'F' ");

            if (tanevId.IsEntityId())
            {
                commandText.Append(@" and T_TANTERV_OSSZES.c_tanevId = :pTanevID");
                paramsList.Add(new CommandParameter("pTanevID", tanevId));
            }

            var ds = this.GetData(commandText.ToString(), paramsList);

            return ds;
        }

        public DataSet GetTantervek()
        {
            var CommandText = @"
                SELECT
                  tt.ID ID,
                  tt.C_NEV Nev,
                  tt.C_CSOPORTTIPUSA CsoportTipusa,
                    tt.C_EVFOLYAMIG Evfolyamig,
                    tt.C_EVFOLYAMTOL Evfolyamtol,
                    tt.C_MEGJEGYZES Megjegyzes
                FROM
                  T_TANTERV as tt
                WHERE
                  tt.TOROLT = 'F'
            ";

            var ds = GetData(CommandText, dictionaryItemColumns: "CsoportTipusa,Evfolyamig,Evfolyamtol");

            return ds;
        }

        public DataSet GetTantervOsztalyai(int tantervId, int tanevId)
        {
            List<CommandParameter> parameters = new List<CommandParameter>(); /// TODO(@DevKornél): mehetnének list-be object initializerrel
            parameters.Add(new CommandParameter("pTantervId", tantervId));
            parameters.Add(new CommandParameter("pTanevId", tanevId));
            parameters.Add(new CommandParameter("OktNevKatTipus", (int)OktNevelesiKategoriaEnum.NevelesOktatas));

            var command = @"
                SELECT
                    ocs.ID,
                    ocs.C_NEV Nev,
                    ocs.C_EVFOLYAMTIPUSA Evfolyam,
                    LETSZAM.TANULOKSZAMA Letszam
                FROM T_OSZTALYCSOPORT_OSSZES ocs
                    INNER JOIN T_OSZTALY_OSSZES on T_OSZTALY_OSSZES.ID = ocs.ID
                    left JOIN
                        (
                        SELECT C_OSZTALYCSOPORTID, count(C_TANULOID) TANULOKSZAMA FROM T_TANULOCSOPORT
                        WHERE
                            T_TANULOCSOPORT.TOROLT = 'F' and T_TANULOCSOPORT.C_BELEPESDATUM < GETDATE() and
                            (T_TANULOCSOPORT.C_KILEPESDATUM IS NULL or T_TANULOCSOPORT.C_KILEPESDATUM > GETDATE())
                        GROUP BY C_OSZTALYCSOPORTID
                        ) LETSZAM on LETSZAM.C_OSZTALYCSOPORTID = ocs.ID
                WHERE
                    ocs.TOROLT = 'F' and
                    T_OSZTALY_OSSZES.C_TANTERVID = :pTantervId
                    AND T_OSZTALY_OSSZES.C_ALTANEVID = :pTanevId
                    AND ocs.C_FELADATKATEGORIAID = @OktNevKatTipus
                    ";

            return this.GetData(command, parameters, "Evfolyam");
        }

        public DataSet GetTantervTanuloi(int tantervId, int tanevId)
        {
            List<CommandParameter> parameters = new List<CommandParameter>(); /// TODO(@DevKornél): mehetnének list-be object initializerrel
            parameters.Add(new CommandParameter("TantervId", tantervId));
            parameters.Add(new CommandParameter("TanevId", tanevId));
            parameters.Add(new CommandParameter("OktNevKatTipus", (int)OktNevelesiKategoriaEnum.NevelesOktatas));

            var command = @"
                select
                f.ID as ID
                ,f.C_NYOMTATASINEV as Nev
                ,ocs.C_NEV as OsztalyNev
              from T_TANULOTANUGYIADATOK tta
                join T_TANULOCSOPORT tcs on tta.C_TANULOCSOPORTID = tcs.ID and tcs.C_BELEPESDATUM < GETDATE() and (tcs.C_KILEPESDATUM is null or tcs.C_KILEPESDATUM > GETDATE()) and tcs.TOROLT = 'F'
                join T_OSZTALY o on o.ID = tcs.C_OSZTALYCSOPORTID and o.TOROLT = 'F'
                join T_OSZTALYCSOPORT ocs on ocs.ID = o.ID and ocs.C_FELADATKATEGORIAID = @OktNevKatTipus and ocs.TOROLT = 'F'
                join T_TANULO t on t.ID = tcs.C_TANULOID and t.TOROLT = 'F'
                join T_FELHASZNALO f on f.ID = t.ID and f.TOROLT = 'F'
              where
                tta.C_TANTERVID = @TantervId and t.C_ALTANEVID = @TanevId and tta.TOROLT = 'F'
            ";

            return this.GetData(command, parameters);
        }

        public DataSet TantervKereses(int tanevId, string tantervNev = null, int? jellemzoCsopTipId = null, int? kezdoEvfolyamId = null, int? vegzoEvfolyamId = null, int? isKerettantervreEpul = null, int? isKerettanterv = null)
        {
            List<CommandParameter> paramsList = new List<CommandParameter>();

            StringBuilder command = new StringBuilder(@"SELECT
                                                           tanterv.ID AS ID
                                                          ,tanterv.C_NEV AS Nev
                                                          ,tanterv.C_CSOPORTTIPUSA AS CsoportTipusa
                                                          ,tanterv.C_EVFOLYAMIG AS Evfolyamig
                                                          ,tanterv.C_EVFOLYAMTOL AS Evfolyamtol
                                                          ,tanterv.C_MEGJEGYZES AS Megjegyzes
                                                          ,C_ISKERETTANTERV as IsKerettanterv
                                                        FROM T_TANTERV_OSSZES tanterv
                                                        WHERE tanterv.TOROLT = 'F'");

            if (!string.IsNullOrWhiteSpace(tantervNev))
            {
                command.Append($" AND lower(tanterv.C_NEV) like '%' + @{nameof(tantervNev)} + '%'");
                paramsList.Add(new CommandParameter(nameof(tantervNev), tantervNev.ToLowerInvariant()));
            }

            if (jellemzoCsopTipId.HasValue)
            {
                command.Append(@" AND tanterv.C_CSOPORTTIPUSA = :pJellCsopTip");
                paramsList.Add(new CommandParameter("pJellCsopTip", jellemzoCsopTipId));
            }

            if (kezdoEvfolyamId.HasValue)
            {
                command.Append(@" AND tanterv.C_EVFOLYAMTOL = :pKezdEvf");
                paramsList.Add(new CommandParameter("pKezdEvf", kezdoEvfolyamId));
            }

            if (vegzoEvfolyamId.HasValue)
            {
                command.Append(@" AND tanterv.C_EVFOLYAMIG = :pVegEvf");
                paramsList.Add(new CommandParameter("pVegEvf", vegzoEvfolyamId));
            }

            if (isKerettantervreEpul.HasValue)
            {
                if (isKerettantervreEpul.Value == 1)
                {
                    command.Append(@" AND tanterv.C_KERETTANTERVREEPULO = 'T'");
                }
                if (isKerettantervreEpul.Value == 0)
                {
                    command.Append(@" AND tanterv.C_KERETTANTERVREEPULO = 'F'");
                }
            }

            if (isKerettanterv.HasValue)
            {
                if (isKerettanterv.Value == 1)
                {
                    command.Append(@" AND tanterv.C_ISKERETTANTERV = 'T'");
                }
                if (isKerettanterv.Value == 0)
                {
                    command.Append(@" AND tanterv.C_ISKERETTANTERV = 'F'");
                }
            }

            command.Append(@" AND tanterv.C_TANEVID = :pTanevId");
            paramsList.Add(new CommandParameter("pTanevId", tanevId));

            var ds = GetData(command.ToString(), paramsList, dictionaryItemColumns: "CsoportTipusa,Evfolyamig,Evfolyamtol", booleanColumns: "IsKerettanterv");
            return ds;
        }

        public void Insert(ITanterv dto)
        {
            var entity = dto as Tanterv;
            entity.Insert();
            dto.ID = entity.ID;

            FollowUp(entity);

            DalHelper.Commit();
        }

        public void FullUpdate(ITanterv dto)
        {
            var entity = dto as Tanterv;
            entity.FullUpdate();

            FollowUp(entity);

            DalHelper.Commit();
        }

        public void Update(ITanterv dto)
        {
            var entity = dto as Tanterv;
            entity.Update();

            FollowUp(entity);

            DalHelper.Commit();
        }

        public void Delete(ITanterv dto)
        {
            var entity = dto as Tanterv;

            entity.Delete();
            DalHelper.Commit();
        }

        public void FollowUpTanterv(int intezmenyId, int aktTanevId, int kovetkezoTanevId, int tantervId)
        {
            using (SDACommand command = new SDACommand())
            {
                command.Connection = UserContext.Instance.SDAConnection;
                command.Transaction = UserContext.Instance.SDATransaction;
                command.CommandText = "uspFollowUpTanterv";
                command.Parameters.Add("intezmenyId", intezmenyId);
                command.Parameters.Add("aktTanevId", aktTanevId);
                command.Parameters.Add("kovetkezoTanevId", kovetkezoTanevId);
                command.Parameters.Add("tantervId", tantervId);
                command.CommandType = CommandType.StoredProcedure;
                command.ExecuteNonQuery();
                DalHelper.Commit();
            }
        }

        public int GetKovTanevTanterv(int tantervId, int tanevId)
        {
            using (var commandByTantervId = new SDACommand
            {
                Connection = UserContext.Instance.SDAConnection,
                Transaction = UserContext.Instance.SDATransaction
            })
            {

                commandByTantervId.Parameters.Add("pTantervId", tantervId);
                commandByTantervId.CommandText = @"
                SELECT
                tt.ID
              FROM T_TANTERV_OSSZES tt
              WHERE
                tt.ELOZOTANEVIREKORDID = :pTantervId AND tt.TOROLT = 'F'
            ";

                var resultByTantervId = commandByTantervId.ExecuteScalar();
                if (resultByTantervId != null)
                    return int.Parse(resultByTantervId.ToString());

            }

            using (var commandByTanevId = new SDACommand
            {
                Connection = UserContext.Instance.SDAConnection,
                Transaction = UserContext.Instance.SDATransaction
            })
            {

                commandByTanevId.Parameters.Add("pTanevId", tanevId);
                commandByTanevId.CommandText = @"
                SELECT
                  ID
                FROM T_TANTERV_OSSZES
                WHERE
                  C_TANEVID = :pTanevId
                    AND TOROLT = 'F'
                    AND C_VEDETT = 'T'
            ";
                var resultByTanevId = commandByTanevId.ExecuteScalar();
                if (resultByTanevId != null)
                    return int.Parse(resultByTanevId.ToString());
            }

            return -1;
        }

        public ITanterv Get()
        {
            return Tanterv.GiveAnInstance();
        }

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

        public int GetKovTanevIdByAktTanevId(int id)
        {
            using (var command = new SDACommand())
            {
                command.Connection = UserContext.Instance.SDAConnection;
                command.Transaction = UserContext.Instance.SDATransaction;

                command.Parameters.Add(nameof(id), id);

                command.CommandText = $@"
                    SELECT ID
                        FROM T_TANTERV_OSSZES
                    WHERE
                        ELOZOTANEVIREKORDID = @{nameof(id)}
                        AND TOROLT = 'F'
                ";

                var result = command.ExecuteScalar();
                int.TryParse(result?.ToString(), out int res);
                return res;
            }
        }

        public int GetTop1TantervId(int tanevId)
        {
            SDA.DataProvider.SDACommand command = new SDA.DataProvider.SDACommand();
            command.Connection = UserContext.Instance.SDAConnection;
            command.Transaction = UserContext.Instance.SDATransaction;

            command.Parameters.Add("pTanevId", tanevId);

            command.CommandText = @"
                SELECT TOP 1
                tt.ID
              FROM T_TANTERV_OSSZES tt
              WHERE
                tt.C_TANEVID = :pTanevId
                AND tt.TOROLT = 'F'
            ";

            var result = command.ExecuteScalar();
            if (result != null)
                return int.Parse(result.ToString());
            return -1;
        }
    }
}