using System;
using System.Collections.Generic;
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 BS.Shared.DataContracts.Compact;
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()
        {
            Model.Report = null;

            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 = AbstractModel.HasRightMitarbeiterstundenkontoViewAll 
                ? EmployeeService.GetActiveCompactEmployeesForEmployee(MobileSessionFacade.LoggedInCompactEmployee.EmployeeOid) 
                : new List<CompactEmployeeDC> { MobileSessionFacade.LoggedInCompactEmployee };

            // Alle Teams darf man nur sehen, wenn man das Recht "HasRightMitarbeiterstundenkontoViewAll" hat.
            // Hat man weder das Recht "HasRightMitarbeiterstundenkontoViewAll" noch "HasRightMitarbeiterstundenkontoViewTeams", sieht man die Teams gar nicht.
            // Hat man das Recht "HasRightMitarbeiterstundenkontoViewTeams", aber nicht das Recht "HasRightMitarbeiterstundenkontoViewAll", sieht man nur die Teams, deren Teamleiter man ist.

            var test = EmployeeService.FindLeadingCompactTeamsOfEmployee(MobileSessionFacade.LoggedInCompactEmployee.EmployeeOid);

            Model.AllTeams = AbstractModel.HasRightMitarbeiterstundenkontoViewAll
                ? EmployeeService.GetAllActiveCompactTeamsForEmployee(MobileSessionFacade.LoggedInEmployee.EmployeeOid) 
                : EmployeeService.FindLeadingCompactTeamsOfEmployee(MobileSessionFacade.LoggedInCompactEmployee.EmployeeOid);

            if(!AbstractModel.HasRightMitarbeiterstundenkontoViewAll)
            {
                Model.SelectedEmployeeOid = MobileSessionFacade.LoggedInCompactEmployee.EmployeeOid;
            }

            // ToDo: Hat man das Recht "Nur Team" nicht, kann man nur die Teams sehen, bei denen man auch Leiter ist.
            if(!AbstractModel.HasRightMitarbeiterstundenkontoViewTeams)
            {
                
            }

            Model.ReportTypes = new List<SelectListItem>();

            if(AbstractModel.HasRightToViewReports)
            {
                Model.ReportTypes.Add(new SelectListItem
                {
                    Text = "Berichte",
                    Value = "0"
                });
            }

            if(AbstractModel.HasRightToViewMitarbeiterstundenkonto)
            {
                Model.ReportTypes.Add(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 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)}";

            return GetSiteOfOrigin() + urlSuffix;
        }

        private string GetSiteOfOrigin()
        {
            if(Model?.Employee?.EmployeeOid is null)
            {
                return null;
            }

            var url = Request?.Url;

#if DEBUG
            return "http://localhost:3777/Host";
#endif

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

        [Authorize]
        public ActionResult LoadViewerForm(string reportType)
        {
            if(Model is null)
            {
                return Logout();
            }

            Model.SelectedReportType = reportType == "0" ? ReportType.Berichte : ReportType.Mitarbeiterstundenkonto;
            
            return PartialView("ReportViewerFormPartial", Model);
        }

        [Authorize]
        public ActionResult LoadMitarbeiterstundenkonto(string parameters)
        {
            if(Model?.Employee?.EmployeeOid is null)
            {
                return Logout();
            }

            if(!string.IsNullOrWhiteSpace(parameters))
            {
                var splitParameters = parameters.Split(';');

                if(splitParameters.Length == 6)
                {
                    var month = int.Parse(splitParameters[0]);
                    var year = int.Parse(splitParameters[1]);
                    var isEmployee = bool.Parse(splitParameters[2]);
                    var all = bool.Parse(splitParameters[3]);
                    
                    long? oid = null;
                    if(long.TryParse(splitParameters[4], out var oOid))
                    {
                        oid = oOid;
                    }

                    var ansicht = int.Parse(splitParameters[5]);

                    var siteOfOrigin = GetSiteOfOrigin();

                    var url = $"{siteOfOrigin}/ReportView.aspx?type={Utils.EnumName(ReportTypes.EmployeeHourReport)}";

                    if(isEmployee)
                    {
                        var employeeOid = oid;

                        if(all || !AbstractModel.HasRightMitarbeiterstundenkontoViewAll)
                        {
                            employeeOid = null;
                        }

                        if(!(employeeOid is null))
                        {
                            employeeOid = oid;
                        }

                        if(!AbstractModel.HasRightMitarbeiterstundenkontoViewAll)
                        {
                            employeeOid = Model.Employee.EmployeeOid;
                        }

                        if(employeeOid > 0)
                        {
                            url += $"&eoid={employeeOid}";
                        }
                    }
                    else
                    {
                        var teamOid = oid;

                        if(all || (!AbstractModel.HasRightMitarbeiterstundenkontoViewAll && !AbstractModel.HasRightMitarbeiterstundenkontoViewTeams))
                        {
                            teamOid = null;
                        }

                        if(!(teamOid is null))
                        {
                            teamOid = oid;
                        }

                        url += "&toid=";

                        if(teamOid > 0 && !all)
                        {
                            url += $"{teamOid}";
                        }
                        else if(all)
                        {
                            url += string.Join(",", Model.AllTeams.Select(team => team.TeamOid));
                        }
                    }

                    url += $"&m={month}&y={year}";

                    if(ansicht != 0)
                    {
                        url += $"&ansicht={ansicht}";
                    }

                    var tempToken = DownloadService.CreateTemporaryToken(url, true);

                    url += $"&token={tempToken}";

                    var webClient = new WebClient();

                    var data = webClient.DownloadData(url);

                    var report = new XtraReport();

                    using(var memoryStream = new MemoryStream(data))
                    {
                        report.PrintingSystem.LoadDocument(memoryStream);
                    }
                    
                    Model.Report = report;
                }
            }
            
            return PartialView("DocumentWebViewerPartial", Model);
        }
    }
}