using System;
using System.Collections.Generic;
using System.Data;
using System.IO;
using System.Linq;
using System.Net;
using System.Web.Mvc;
using BeWo.Service.Security;
using BeWoPlanerMobil.Models;
using BeWoPlanerMobil.Service;
using BeWoPlanerMobil.Util;
using BS.Shared;
using BS.Shared.Core;
using BS.Shared.DataContracts;
using DevExpress.CodeParser;
using DevExpress.XtraReports.UI;

namespace BeWoPlanerMobil.Controllers
{
    public class ReportViewerController : AbstractBaseController
    {
        

        private ReportViewerModel _Model;

        public ReportViewerModel Model
        {
            get
            {
                if(!MobileSessionFacade.IsUserLoggedIn())
                {
                    RedirectToActionPermanent("Index", "Login");
                    return null;
                }

                if(((ReportViewerModel)Session[ModelSessionConstants.ReportViewerModelKey])?.Employee is null)
                {
                    _Model = new ReportViewerModel { Employee = MobileSessionFacade.LoggedInEmployee };
                    Session[ModelSessionConstants.ReportViewerModelKey] = _Model;
                }
                else
                {
                    _Model = (ReportViewerModel)Session[ModelSessionConstants.ReportViewerModelKey];
                }

                return _Model;
            }
        }


        public ActionResult ReportViewer()
        {
            var month = DateTime.Today.Month;
            var year = DateTime.Today.Year;
            var first = new DateTime(year, month, 1).AddMonths(-1);

            Model.SelectedYear = Model.SelectedYear ?? first.Year;
            Model.SelectedMonth = Model.SelectedMonth ?? first.Month;

            Model.AllEmployees = EmployeeService.GetActiveCompactEmployeesForEmployee(MobileSessionFacade.LoggedInCompactEmployee.EmployeeOid);
            Model.AllTeams = EmployeeService.GetAllActiveCompactTeamsForEmployee(MobileSessionFacade.LoggedInEmployee.EmployeeOid);

            Model.ReportTypes = new List<SelectListItem>
            {
                new SelectListItem
                {
                    Text = "Berichte",
                    Value = "0"
                },
                new SelectListItem
                {
                    Text = "Mitarbeiterstundenkonto",
                    Value = "1"
                }
            };

            Model.SelectedReportType = ReportType.Berichte;

            Model.Queries = QueryService.GetAllQueriesOfType(QueryType.Public);


            return View(Model);
        }

        [Authorize]
        public ActionResult DocumentWebViewerPartial()
        {
            return PartialView("DocumentWebViewerPartial", Model);
        }

        [Authorize]
        public ActionResult ExportDocumentViewer()
        {
            throw new NotImplementedException("Service dafür implementieren!");
        }
        
        [Authorize]
        public ActionResult LoadCustomReport(long? reportOid)
        {
            if(Model?.Employee?.EmployeeOid is null || reportOid is null)
            {
                return Logout();
            }

            var selectedQuery = Model.Queries.FirstOrDefault(query => query.Oid.Equals(reportOid.Value));

            if(selectedQuery is null)
            {
                Model.Report = null;
                return PartialView("DocumentWebViewerPartial", Model);
            }

            var queryReportUri = GetQueryReportUrl(selectedQuery);
            var baseUri = SecurityUtils.RemoveAuthenticationInfoFromUri(queryReportUri);

            var test = QueryService.ExecuteQuery(selectedQuery.Oid, null);

            if(test is null)
            {
                return PartialView("DocumentWebViewerPartial", Model);
            }

            QueryService.PrepareQueryReport(test, $"{MobileSessionFacade.Tenant}queryeoid{Model.Employee.EmployeeOid.Value}");

            var tempToken = DownloadService.CreateTemporaryToken(baseUri, false);

            var addChar = baseUri.Contains("?") ? "&" : "?";
            var finalUri = $"{baseUri}{addChar}token={tempToken}";

            var webClient = new WebClient();

            var data = webClient.DownloadData(finalUri);

            var report = new XtraReport();

            using(var memoryStream = new MemoryStream(data))
            {
                report.PrintingSystem.LoadDocument(memoryStream);
            }

            Model.Report = report;

            return PartialView("DocumentWebViewerPartial", Model);
        }

        [Authorize]
        private string GetQueryReportUrl(QueryDC query)
        {
            var url = Request?.Url;
            
            if(Model?.Employee?.EmployeeOid is null || url is null || query is null)
            {
                return null;
            }

            //DEBUG:   http://localhost:3777/service
            //RELEASE: https://app4.bewoplaner.de/service
            // http://localhost:3777/Host/ReportView.aspx?dcid=demoqueryeoid372&qoid=1304&type=QueryReport

            var urlSuffix = $"/ReportView.aspx?dcid={MobileSessionFacade.Tenant}queryeoid{Model.Employee.EmployeeOid.Value}&qoid={query.Oid}&type={Utils.EnumName(ReportTypes.QueryReport)}";

            #if DEBUG
            return $"http://localhost:3777/Host{urlSuffix}";
            #endif

            return $"{url.Scheme}//{url.Host}{urlSuffix}";
        }
    }
}