using System;
using System.Collections.Generic;
using System.IO;
using System.Linq;
using System.Net;
using System.Web;
using System.Web.Mvc;
using Kreta.BusinessLogic.HelperClasses;
using Kreta.BusinessLogic.HelperClasses.ImportCo;
using Kreta.BusinessLogic.Helpers;
using Kreta.BusinessLogic.Helpers.ImportExport;
using Kreta.BusinessLogic.Security;
using Kreta.Core;
using Kreta.Enums.ManualEnums;
using Kreta.Enums.ManualEnums.ImportExport;
using Kreta.Resources;
using Kreta.Web.Areas.ImportExport.Models.CommonModels;
using Kreta.Web.Areas.ImportExport.Models.TanmenetImportExport;
using Kreta.Web.Classes;
using Kreta.Web.Helpers;
using Kreta.Web.Models.EditorTemplates;
using Kreta.Web.Security;

namespace Kreta.Web.Areas.ImportExport.Controllers
{
    [MvcRoleClaimsAuthorize(true)]
    [MvcRolePackageDenyAuthorize(KretaClaimPackages.IsOnlyAlkalmozott.ClaimValue)]
    [MvcRolePackageAuthorize(TanevEnum.AktTanev, KretaClaimPackages.Tanar.ClaimValue)]
    public abstract class BaseTanmenetImportExportController : BaseImportExportController
    {
        #region Properties

        public static string GridName => "TanmenetGrid";
        public static string GridRowTemplateName => "TanmenetGridRowTemplate";

        public static string JavascriptHelperClassName => "TanmenetImportExportHelper";

        protected IKretaAuthorization Authorization { get; }

        #endregion Properties

        #region Constructors

        public BaseTanmenetImportExportController(IUploadFileValidator uploadFileValidator, IKretaAuthorization authorization)
        {
            UploadFileValidator = uploadFileValidator ?? throw new ArgumentNullException(nameof(uploadFileValidator));
            Authorization = authorization ?? throw new ArgumentNullException(nameof(authorization));
        }

        #endregion Constructors

        #region Sablon

        public ActionResult DownloadTemplate()
        {
            MemoryStream memoryStream = new TanmenetImportExportHelper(ConnectionTypeExtensions.GetSessionConnectionType()).GetTemplate();
            return new FileStreamResult(memoryStream, Core.Constants.ContentTypes.Xlsx) { FileDownloadName = ImportExportTanmenetResource.ImportSablonFileName };
        }

        #endregion Sablon

        #region Export

        [HttpPost]
        [MvcValidateAjaxAntiForgeryToken]
        public string Export(int? exportTantargyfelosztasId)
        {
            var errorResult = new List<string>();
            if (!exportTantargyfelosztasId.IsEntityId())
            {
                errorResult.Add(ImportExportTanmenetResource.InvalidFoglalkozas);
            }

            if (errorResult.Count > 0)
            {
                return string.Join("<br />", errorResult);
            }

            MemoryStream memoryStream = new TanmenetImportExportHelper(ConnectionTypeExtensions.GetSessionConnectionType()).GetExport(exportTantargyfelosztasId.Value);
            return GetExportFileString(memoryStream);
        }

        public string NemImportalhatoSorokExport()
        {
            MemoryStream memoryStream = new TanmenetImportExportHelper(ConnectionTypeExtensions.GetSessionConnectionType()).GetNemImportalhatoSorokExport();
            return GetExportFileString(memoryStream);
        }

        #endregion Export

        #region Import

        [NonAction]
        public JsonResult UploadFile(HttpPostedFileBase importFile, int? tantargyfelosztasId, bool isFromSzervezet)
        {
            UploadFileValidator.ValidateImportFile(importFile);

            var errorResult = new List<string>();

            if (tantargyfelosztasId == null)
            {
                errorResult.Add(ImportExportTanmenetResource.InvalidFoglalkozas);
            }

            Dictionary<int, string> importHeaderList = TanmenetImportExportHelper.ImportHeaderList;
            List<List<string>> importData = ImportExportHelper.GetImportDataFromExcel(importFile.InputStream, importHeaderList, out List<string> fileErrorResultList);
            errorResult.AddRange(fileErrorResultList);

            if (errorResult.Count > 0)
            {
                JsonResult errorJson = ThrowCustomError(errorResult);
                return errorJson;
            }

            new TanmenetImportExportHelper(ConnectionTypeExtensions.GetSessionConnectionType()).SetImportCo(importData, tantargyfelosztasId.Value, isFromSzervezet);

            return Json(null);
        }

        public ActionResult OpenImportPreviewPopup()
        {
            TanmenetImportCo importCo = new TanmenetImportExportHelper(ConnectionTypeExtensions.GetSessionConnectionType()).ImportCo;
            List<TanmenetItemCo> coList = new TanmenetHelper(ConnectionTypeExtensions.GetSessionConnectionType()).GetTanmenetCoList(ClaimData.FelhasznaloId).Where(x => x.TantargyfelosztasId == importCo.Tantargyfelosztas.Id).ToList();

            var importInfoModel = new TanmenetImportInfoModel
            {
                ImportInfoSummaryList = new ImportInfoSummaryListModel
                {
                    ImportInfoSummaryModelList = new List<ImportInfoSummaryModel>
                    {
                        GetImportInfoSummary(importCo, coList)
                    }
                },
                MainImportItemList = new TanmenetImportItemListModel
                {
                    ImportItemModelList = GetImportItemModelList(importCo, coList)
                },
                NemImportalhatoItemList = new TanmenetImportNemImportalhatoItemListModel
                {
                    NemImportalhatoItemModelList = GetNemImportalhatoItemModelList(importCo.NemImportalhatoItemList)
                }
            };

            var popUpModel = new PopUpModel(importInfoModel, $"~/Areas/ImportExport/Views/TanmenetImportExport/{ImportPreviewPopupName}.cshtml");
            popUpModel.AddCancelBtn(popUpModel, "KretaWindowHelper.destroyAllWindow");
            popUpModel.AddBtn(popUpModel, "ImportBtnOk", CommonResource.Importalas, $"{JavascriptHelperClassName}.import", "BtnOk", setDisabledAfterClick: true);
            popUpModel.AddBtn(popUpModel, "NemImportalhatoSorokExportBtnOk", ImportExportCommonResource.NemImportalhatoSorokExportalasa, $"{JavascriptHelperClassName}.nemImportalhatoSorokExport", "BtnOk");
            return PartialView(Constants.General.PopupView, popUpModel);
        }

        private static ImportInfoSummaryModel GetImportInfoSummary(TanmenetImportCo importCo, List<TanmenetItemCo> coList)
        {
            List<TanmenetImportJsonItemCo> mainImportJsonItemList = importCo.MainImportJsonItemList;
            int insertRowCount = mainImportJsonItemList?.Count(x => x.Operation == (int)ImportItemOperationEnum.Insert) ?? 0;
            int deleteRowCount = coList.Count;
            int invalidRowCount = importCo.NemImportalhatoItemList.Count;
            var importInfoSummary = new ImportInfoSummaryModel
            {
                ImportName = ImportExportTanmenetResource.ImportDefaultSheetName,
                InsertRowCount = insertRowCount.ToString(),
                UpdateRowCount = "-",
                DeleteRowCount = deleteRowCount.ToString(),
                UnchangedRowCount = "-",
                InvalidRowCount = invalidRowCount.ToString()
            };

            return importInfoSummary;
        }

        private List<TanmenetImportItemModel> GetImportItemModelList(TanmenetImportCo importCo, List<TanmenetItemCo> coList)
        {
            var importItemModelList = new List<TanmenetImportItemModel>();
            List<TanmenetImportJsonItemCo> mainImportJsonItemList = importCo.MainImportJsonItemList;
            if (mainImportJsonItemList == null)
            {
                if (!(coList.Count > 0))
                {
                    return importItemModelList;
                }

                mainImportJsonItemList = new List<TanmenetImportJsonItemCo>();
            }

            //NOTE: Hozzáadjuk azokat a az elemeket, amik az excel-ből jöttek!
            foreach (TanmenetImportJsonItemCo importJsonItem in mainImportJsonItemList)
            {
                importItemModelList.Add(new TanmenetImportItemModel
                {
                    OraSorszam = importJsonItem.OraSorszam.ToString(),
                    Tema = importJsonItem.Tema ?? string.Empty,
                    Operation = importJsonItem.Operation
                });
            }

            //NOTE: Hozzáadjuk azokat a az elemeket, amik az adatbázisból jöttek!
            foreach (TanmenetItemCo co in coList)
            {
                if (!mainImportJsonItemList.Select(x => x.Id).Contains(co.Id))
                {
                    importItemModelList.Add(new TanmenetImportItemModel
                    {
                        OraSorszam = co.OraSorszam.ToString(),
                        Tema = co.Tema ?? string.Empty,
                        Operation = (int)ImportItemOperationEnum.Delete
                    });
                }
            }

            return importItemModelList.OrderBy(x => int.Parse(x.OraSorszam)).ThenByDescending(x => x.OperationText).ToList();
        }

        private List<TanmenetImportNemImportalhatoItemModel> GetNemImportalhatoItemModelList(List<TanmenetImportItemCo> nemImportalhatoItemList)
        {
            var nemImportalhatoItemModelList = new List<TanmenetImportNemImportalhatoItemModel>();
            foreach (TanmenetImportItemCo nemImportalhatoItem in nemImportalhatoItemList)
            {
                nemImportalhatoItemModelList.Add(new TanmenetImportNemImportalhatoItemModel
                {
                    OraszamImportData = nemImportalhatoItem.OraszamImportData,
                    TemaImportData = nemImportalhatoItem.TemaImportData,

                    ErrorList = string.Join(Environment.NewLine, nemImportalhatoItem.ErrorList)
                });
            }

            return nemImportalhatoItemModelList.OrderBy(x => x.OraszamImportData).ToList();
        }

        [NonAction]
        protected ActionResult Import(string tovabbUrl)
        {
            if (ModelState.IsValid)
            {
                var helper = new TanmenetImportExportHelper(ConnectionTypeExtensions.GetSessionConnectionType());
                TanmenetImportCo importCo = helper.ImportCo;
                helper.Import(new { ImportJson = importCo }, importCo.ImportMuvelet, importCo.Tantargyfelosztas.TantargyId, importCo.Tantargyfelosztas.OsztalyCsoportId);

                return Content(Url.Content(tovabbUrl));
            }

            return new HttpStatusCodeResult(HttpStatusCode.BadRequest);
        }

        #endregion Import
    }
}