using System;
using System.Collections.Generic;
using System.Data;
using System.IO;
using System.Linq;
using Kreta.BusinessLogic.Classes;
using Kreta.BusinessLogic.HelperClasses;
using Kreta.BusinessLogic.Interfaces;
using Kreta.BusinessLogic.Utils;
using Kreta.Client.FileService.Request;
using Kreta.Client.FileService.Response;
using Kreta.Core;
using Kreta.Core.ConnectionType;
using Kreta.Core.Enum;
using Kreta.Core.Exceptions;
using Kreta.DataAccess.Interfaces;
using Kreta.DataAccessManual;
using Kreta.DataAccessManual.Interfaces;
using Kreta.Resources;

namespace Kreta.BusinessLogic.Helpers
{
    public class DktFileHelper : LogicBase
    {
        #region Fields

        private readonly IFileServiceHelper fileServiceHelper;

        #endregion Fields

        #region Constructors

        public DktFileHelper(IConnectionType connectionType, IFileServiceHelper fileServiceHelper) : base(connectionType)
        {
            this.fileServiceHelper = fileServiceHelper ?? throw new ArgumentNullException(nameof(fileServiceHelper));
        }

        public DktFileHelper(IConnectionType connectionType) : base(connectionType) { }

        #endregion Constructors

        #region FileService Functions

        public void DeleteCsatolmany(int id, bool withFileServiceDelete)
        {
            Dal.CustomConnection.Run(ConnectionType, dalHandler =>
            {
                if (withFileServiceDelete)
                {
                    IDKT_File csatolmany = dalHandler.DKT_FileDAL().Get(id);
                    if (!fileServiceHelper.Delete(IntezmenyAzonosito, new FileDeleteRequest(csatolmany.Utvonal, csatolmany.FileGuid.Value)))
                    {
                        throw new BlException(ErrorResource.FajlTorleseSikertelen);
                    }
                }

                dalHandler.DKT_FileDAL().Delete(id, FelhasznaloId);
            });
        }

        public (string Name, byte[] Data) GetCsatolmanyData(IDalHandler h, int id)
        {
            IDKT_File csatolmany = h.DKT_FileDAL().Get(id);
            var fileName = string.Concat(csatolmany.FileNev.TrimEnd('.'), '.', csatolmany.Extension.TrimStart('.'));
            var fileContent = fileServiceHelper.GetFile(IntezmenyAzonosito, new GetUrlRequest(csatolmany.Utvonal, csatolmany.FileGuid.Value, fileName));
            byte[] data = null;

            if (!string.IsNullOrWhiteSpace(fileContent.Tartalom))
                data = Convert.FromBase64String(fileContent.Tartalom);

            return (fileName, data);
        }

        /// INFO @Tojcsi: Mobil használja
        public (string Name, byte[] Data) GetCsatolmanyData(IDKT_File csatolmany)
        {
            var fileName = string.Concat(csatolmany.FileNev.TrimEnd('.'), '.', csatolmany.Extension.TrimStart('.'));
            var fileContent = fileServiceHelper.GetFile(IntezmenyAzonosito, new GetUrlRequest(csatolmany.Utvonal, csatolmany.FileGuid.Value, fileName));
            byte[] data = Convert.FromBase64String(fileContent.Tartalom);
            return (fileName, data);
        }

        public FileDownloadCO GetCsatolmanyFile(int id)
        {
            var (Name, Data) = Dal.CustomConnection.Run(ConnectionType, dalHandler => GetCsatolmanyData(dalHandler, id));
            return new FileDownloadCO() { Stream = new MemoryStream(Data), FileName = Name };
        }

        public int? UploadCsatolmany(string fileName, byte[] content, string contentType, int hazifeladatId, Guid globalIntezmenyId)
        {
            string path = $"DKT/{globalIntezmenyId}/{TanevId}/hazifeladatok/{hazifeladatId}";
            FileUploadResponse fileUploadResponse = fileServiceHelper.Upload(new DKT_FileUploadRequest(fileName, content, contentType, path));
            if (fileUploadResponse.IsSuccess)
            {
                int result = Dal.CustomConnection.Run(ConnectionType, dalHandler =>
                {
                    IDKT_FileDAL dktFileDal = dalHandler.DKT_FileDAL();

                    IDKT_File csatolmany = dktFileDal.Get();
                    csatolmany.FeltoltesDatum = DateTime.Now;
                    csatolmany.FileGuid = fileUploadResponse.FajlAzonosito;
                    csatolmany.FileSizeByte = fileUploadResponse.FajlMeretByteLength;

                    int lastIndex = fileName.LastIndexOf('.');
                    string fileNev = fileName.Substring(0, lastIndex);
                    string fileExt = fileName.Substring(lastIndex + 1);

                    csatolmany.FileNev = fileNev;
                    csatolmany.Extension = fileExt;
                    csatolmany.Utvonal = fileUploadResponse.Utvonal;
                    csatolmany.TanevId = TanevId;
                    csatolmany.IntezmenyId = IntezmenyId;
                    csatolmany.IntezmenyGuid = dalHandler.IntezmenyDal().Get(IntezmenyId).Guid.Value;
                    csatolmany.VeglegesitesDatum = DateTime.Now;
                    csatolmany.FeltoltoAlkalmazottId = FelhasznaloId;

                    var csatolmanyId = dktFileDal.Insert(csatolmany);

                    dktFileDal.ConnectToHaziFeladat(IntezmenyId, TanevId, hazifeladatId, csatolmanyId);

                    return csatolmanyId;

                });

                return result;
            }

            throw new BlException(ErrorResource.FajlFeltolteseSikertelen);
        }

        public int UploadFile(string fileName, byte[] content, string contentType, string path)
        {
            FileUploadResponse fileUploadResponse = fileServiceHelper.Upload(new FileUploadRequest(fileName, content, contentType, path));
            if (fileUploadResponse.IsSuccess)
            {
                int result = Dal.CustomConnection.Run(ConnectionType, dalHandler =>
                {
                    IDKT_FileDAL dktFileDal = dalHandler.DKT_FileDAL();

                    IDKT_File csatolmany = dktFileDal.Get();
                    csatolmany.FeltoltesDatum = DateTime.Now;
                    csatolmany.FileGuid = fileUploadResponse.FajlAzonosito;
                    csatolmany.FileSizeByte = fileUploadResponse.FajlMeretByteLength;

                    int lastIndex = fileName.LastIndexOf('.');
                    string fileNev = fileName.Substring(0, lastIndex);
                    string fileExt = fileName.Substring(lastIndex + 1);

                    csatolmany.FileNev = fileNev;
                    csatolmany.Extension = fileExt;
                    csatolmany.Utvonal = fileUploadResponse.Utvonal;
                    csatolmany.TanevId = TanevId;
                    csatolmany.IntezmenyId = IntezmenyId;
                    csatolmany.IntezmenyGuid = dalHandler.IntezmenyDal().Get(IntezmenyId).Guid.Value;
                    csatolmany.VeglegesitesDatum = DateTime.Now;
                    csatolmany.FeltoltoAlkalmazottId = FelhasznaloId;

                    return dktFileDal.Insert(csatolmany);

                });

                return result;
            }

            throw new BlException(ErrorResource.FajlFeltolteseSikertelen);
        }

        #endregion

        public double GetHaziFeladatCsatolmanyokOsszMeret(int? felhasznaloId = null)
        {
            double result = Dal.CustomConnection.Run(ConnectionType, dalHandler => dalHandler.DKT_FileDAL().GetHaziFeladatCsatolmanyokOsszMeret(TanevId, felhasznaloId ?? FelhasznaloId));
            return result;
        }

        public int GetMaxAdatmennyisegFelhasznalokent(int felhasznaloId)
        {
            IUserProfile userProfile = Dal.CustomConnection.Run(ConnectionType, dalHandler => dalHandler.Felhasznalo().Get(felhasznaloId).UserProfile.FirstOrDefault(x => !x.Torolt && x.TanevId == TanevId));
            int result = userProfile?.OsszFeltolthetoFajlKb ?? Constants.General.MaxFeltolthetoAdatmennyisegInKByte;
            return result;
        }

        public List<HaziFeladatCsatolmanyItemCo> GetHazifeladatCsatolmanyCoList(HFCsatolmanyokSearchCO co)
        {
            var result = new List<HaziFeladatCsatolmanyItemCo>();
            DataSet dataSet = Dal.CustomConnection.Run(ConnectionType, dalHandler => dalHandler.DKT_FileDAL(GridParameters).GetHaziFeladatCsatolmanyok(TanevId, co.ConvertCoToPco()));
            foreach (DataRow dataRow in dataSet.Tables[0].AsEnumerable())
            {
                result.Add(new HaziFeladatCsatolmanyItemCo(dataRow));
            }

            return result;
        }

        public List<(int CsatolmanyId, string FajlNev)> GetCsatolmanyokForHaziFeladat(int haziFeladatId)
        {
            DataSet dataSet = GetCsatolmanyokForHaziFeladatDataSet(haziFeladatId);

            var result = new List<(int CsatolmanyId, string FajlNev)>();
            foreach (DataRow row in dataSet.Tables[0].Rows)
            {
                int id = SDAConvert.ToInt32(row["ID"]);
                string fajlNev = $"{SDAConvert.ToString(row["FajlNev"]).TrimEnd('.')}.{SDAConvert.ToString(row["FajlKiterjesztes"]).TrimStart('.')}";

                result.Add((id, fajlNev));
            }

            return result;
        }

        public DataSet GetCsatolmanyokForHaziFeladatDataSet(int haziFeladatId)
        {
            DataSet result = Dal.CustomConnection.Run(ConnectionType, dalHandler => dalHandler.DKT_FileDAL().GetCsatolmanyokForHaziFeladatDataSet(TanevId, IntezmenyId, haziFeladatId));

            result.Tables[0].Columns.Add("FajlMeretMB", typeof(double));

            foreach (DataRow dataRow in result.Tables[0].Rows)
            {
                double fajlMeret = SDAConvert.ToDouble(dataRow["FajlMeret"]);
                dataRow["FajlMeretMB"] = CommonUtils.ConvertByteToMByte(fajlMeret);
            }

            return result;
        }

        /// INFO @Tojcsi: Mobil használja
        public (bool jogosult, IDKT_File feltoltottFile) GetFile(IDalHandler h, int tanuloId, int fileId)
        {
            var file = h.DKT_FileDAL().Get(fileId);

            if (file.Torolt)
            {
                throw new BlException(BlExceptionType.NemLetezoEntitas);
            }

            var jogosult = h.DKT_FileDAL().GetJogosultsag(tanuloId, fileId, TanevId);

            return (jogosult, file);
        }

        public bool IsFelhasznaloToltotteFel(IDalHandler h, int id)
        {
            return h.DKT_FileDAL().Get(id).FeltoltoAlkalmazottId == FelhasznaloId;
        }
    }
}