using System;
using System.Collections.Generic;
using System.Configuration;
using System.Diagnostics;
using System.Globalization;
using System.Net;
using System.Net.Mail;
using System.Net.Security;
using System.Reflection;
using System.Web;
using System.Web.Helpers;
using System.Web.Http;
using System.Web.Mvc;
using System.Web.Optimization;
using System.Web.Routing;
using System.Xml;
using Kreta.BusinessLogic.Classes;
using Kreta.BusinessLogic.Helpers;
using Kreta.BusinessLogic.Security;
using Kreta.Client.CoreApi.Configuration;
using Kreta.Client.Eugyintezes.Configuration;
using Kreta.Client.FileService.Configuration;
using Kreta.Client.KGR.Configuration;
using Kreta.Client.Kir;
using Kreta.Client.Leltar.Configuration;
using Kreta.Client.SzirApi.Configuration;
using Kreta.Client.GlobalApi.Configuration;
using Kreta.Core;
using Kreta.Core.Configuratiaton;
using Kreta.Core.JsonConverter;
using Kreta.Framework;
using Kreta.Web.App_Start;
using Kreta.Web.Areas;
using Kreta.Web.Configuration;
using Kreta.Web.Logger;
using Kreta.Web.ModelBinder.Mvc;
using Newtonsoft.Json;
using CoreConstants = Kreta.Core.Constants;

namespace Kreta.Web
{
    public class Global : HttpApplication
    {
        protected static KretaServer.KretaServer kretaServer;

        void Application_Start(object sender, EventArgs e)
        {
            string mdszUrl = ApplicationData.MdszUrl;
            string kirLoginUrl = ApplicationData.KirLoginUrl;
            string kirServiceUrl = KirHelper.GetServiceUrl();
            string kir2ServiceUrl = KirClient.GetServiceUrl();
            string reCAPTCHA = ApplicationData.ReCaptchaValidateUrl;
            string eventHubBaseUrl = CoreConstants.Configuration.EventHubBaseUrl;

            var nexiusConfig = (NexiusCourseServiceConfiguration)ConfigurationManager.GetSection(CoreConstants.ConfigurationSectionNames.NexiusCourseService);
            string nexiusServiceUrl = nexiusConfig.RequestBaseUri.ToString();

            var ugyfelszolgalatConfig = (UgyfelszolgalatConfig)ConfigurationManager.GetSection(CoreConstants.ConfigurationSectionNames.UgyfelszolgalatConfig);

            var kozpontiKretaConfig = (KozpontiKretaConfiguration)ConfigurationManager.GetSection(CoreConstants.ConfigurationSectionNames.KozpontiKretaConfig);

            var eugyintezesClientConfiguration = (EugyintezesClientConfiguration)ConfigurationManager.GetSection("EugyintezesClientConfiguration");
            var kirConfiguration = (KirConfiguration)ConfigurationManager.GetSection("KirConfiguration");

            var sapConfiguration = (SapConfiguration)ConfigurationManager.GetSection("SapConfiguration");

            var fileServiceClientConfiguration = (FileServiceClientConfiguration)ConfigurationManager.GetSection(CoreConstants.ConfigurationSectionNames.FileServiceClientConfiguration);
            var coreApiClientConfiguration = (CoreApiClientConfiguration)ConfigurationManager.GetSection(CoreConstants.ConfigurationSectionNames.CoreApiClientConfiguration);
            var kgrClientConfiguration = (KGRClientConfiguration)ConfigurationManager.GetSection(CoreConstants.ConfigurationSectionNames.KGRClientConfiguration);
            var leltarClientConfiguration = (LeltarClientConfiguration)ConfigurationManager.GetSection(CoreConstants.ConfigurationSectionNames.LeltarClientConfiguration);
            var szirApiClientConfiguration = (SzirApiClientConfiguration)ConfigurationManager.GetSection(CoreConstants.ConfigurationSectionNames.SzirApiClientConfiguration);

            var idpConfiguration = (IdpConfiguration)ConfigurationManager.GetSection(CoreConstants.ConfigurationSectionNames.IdpConfiguration);

            var eesztConfiguration = (EESZTConfiguration)ConfigurationManager.GetSection(CoreConstants.ConfigurationSectionNames.EESZTConfig);
            var globalApiConfiguration = (GlobalApiConfiguration)ConfigurationManager.GetSection(CoreConstants.ConfigurationSectionNames.GlobalApiConfiguration);

            var urls = new string[] { mdszUrl, kirLoginUrl, kirServiceUrl, kir2ServiceUrl, eventHubBaseUrl, nexiusServiceUrl, ugyfelszolgalatConfig.Url,
                kozpontiKretaConfig.KgrUrl, kozpontiKretaConfig.KtrUrl, eugyintezesClientConfiguration.BaseUrl, reCAPTCHA, kirConfiguration.Url,
                sapConfiguration.BaseUrl, fileServiceClientConfiguration.IDPUrl, fileServiceClientConfiguration.FileUploadUrl,
                coreApiClientConfiguration.IDPUrl, coreApiClientConfiguration.DKTUrl, coreApiClientConfiguration.CoreApiIDPUrl, coreApiClientConfiguration.CoreApiUrl, kgrClientConfiguration.IDPUrl, kgrClientConfiguration.KGRUrl,
                leltarClientConfiguration.BaseUrl,
                idpConfiguration.Authority,
                eesztConfiguration.InterfaceUrl,
                szirApiClientConfiguration.ApiUrl,
                globalApiConfiguration.GlobalApiUrl, globalApiConfiguration.TokenUrl
            };

            var poszeidonConfig = (IktatoServiceConfiguration)ConfigurationManager.GetSection(CoreConstants.ConfigurationSectionNames.KretaPoszeidonConfig);

            ServicePointManager.ServerCertificateValidationCallback += (requestSender, certificate, chain, sslPolicyErrors) =>
            {
                var cfg = poszeidonConfig.EndpointAddress.Substring(poszeidonConfig.EndpointAddress.IndexOf("}") + 1);
                if (((HttpWebRequest)requestSender).Address.ToString().EndsWith(cfg))
                {
                    return true;
                }
                if (sslPolicyErrors == SslPolicyErrors.None)
                {
                    if (requestSender is HttpWebRequest request)
                    {
                        var requestUrl = request.Address.ToString();

                        foreach (string url in urls)
                        {
                            if (requestUrl.Contains(url))
                            {
                                return true;
                            }
                        }
                    }
                    else if (requestSender is SmtpClient)
                    {
                        return true;
                    }
                }

                return false;
            };

            ServicePointManager.SecurityProtocol = SecurityProtocolType.Tls11 | SecurityProtocolType.Tls12;

            MvcHandler.DisableMvcResponseHeader = true;
            ServerStarter();

            AreaRegistration.RegisterAllAreas();
            FilterConfig.RegisterGlobalFilters(GlobalFilters.Filters);
            FilterConfig.RegisterGlobalApiFilters(GlobalConfiguration.Configuration.Filters);
            GlobalConfiguration.Configure(WebApiConfig.Register);
            RouteConfig.RegisterRoutes(RouteTable.Routes);
            BundleConfig.RegisterBundles(BundleTable.Bundles);
            AntiForgeryConfig.UniqueClaimTypeIdentifier = KretaClaimTypes.AntiForgeryToken;
            RegisterCustomValidators();
            RegisterCustomModelBinders();

            JsonConvert.DefaultSettings = () => new JsonSerializerSettings
            {
                Culture = new CultureInfo(CoreConstants.General.HungarianCulture)
                {
                    NumberFormat = { NumberDecimalSeparator = "," }
                },
                Converters = new List<JsonConverter> { new StringTrimConverter() }
            };
        }

        void RegisterCustomValidators()
        {
            DataAnnotationsModelValidatorProvider.RegisterAdapter(typeof(KretaRequiredAttribute), typeof(RequiredAttributeAdapter));
            DataAnnotationsModelValidatorProvider.RegisterAdapter(typeof(KretaStringLengthAttribute), typeof(StringLengthAttributeAdapter));
            DataAnnotationsModelValidatorProvider.RegisterAdapter(typeof(KretaRangeAttribute), typeof(RangeAttributeAdapter));
            DataAnnotationsModelValidatorProvider.RegisterAdapter(typeof(KretaMinLengthAttribute), typeof(MinLengthAttributeAdapter));
            DataAnnotationsModelValidatorProvider.RegisterAdapter(typeof(KretaMaxLengthAttribute), typeof(MaxLengthAttributeAdapter));
            DataAnnotationsModelValidatorProvider.RegisterAdapter(typeof(KretaRequiredIfAttribute), typeof(RequiredAttributeAdapter));
            DataAnnotationsModelValidatorProvider.RegisterAdapter(typeof(KretaRegularExpressionAttribute), typeof(RegularExpressionAttributeAdapter));
        }

        void RegisterCustomModelBinders()
        {
            ModelBinders.Binders.Add(typeof(double), new DoubleModelBinder());
            ModelBinders.Binders.Add(typeof(double?), new DoubleModelBinder());
            ModelBinders.Binders.Add(typeof(decimal), new DecimalModelBinder());
            ModelBinders.Binders.Add(typeof(decimal?), new DecimalModelBinder());
            ModelBinders.Binders.Add(typeof(int), new IntegerModelBinder());
            ModelBinders.Binders.Add(typeof(int?), new IntegerModelBinder());
            ModelBinders.Binders.Add(typeof(string), new StringTrimModelBinder());
        }

        private void ServerStarter()
        {
            //Inditaskor loggolas
            WriteStack();

            //Ha valami hiba volt
            if (Application["WebStartRequirement"] != null)
            {
                return;
            }

            AppDomain.CurrentDomain.AssemblyResolve += CurrentDomain_AssemblyResolve;

            //ha nincs inicializalva
            //vagy ha nem fut a server
            //akkor elinditom
            if (kretaServer == null || kretaServer.IsRunning == false)
            {
                XmlNode fullnode = (XmlNode)ConfigurationManager.GetSection("ServerConfig");

                XmlDocument doc = new XmlDocument();
                doc.LoadXml(fullnode.SelectSingleNode("/ServerConfig/config").OuterXml);

                //Server inditasa
                if (kretaServer == null)
                {
                    kretaServer = new KretaServer.KretaServer(doc.DocumentElement);
                }

                if (ApplicationData.KretaDebug)
                {
                    kretaServer.Start();
                }
                else
                {
                    try
                    {
                        kretaServer.Start();
                    }
                    catch
                    {
                        Application["WebStartRequirement"] = "Jelenleg a szolgáltatás szünetel!";
                        return;
                    }
                }

                ApplicationData.SystemType = kretaServer.Configuration.SystemType;
            }

            // fastreport beallitas
            FastReport.Utils.Config.WebMode = true;

            Debug.WriteLine("LEFUTOTT AZ APPLICATIONSTART!!!!!!!");
        }

        void Application_End(object sender, EventArgs e)
        {
            WriteStack();

            //ha nem null
            if (kretaServer != null)
            {
                //ha fut akkor leallitom
                if (kretaServer.IsRunning)
                {
                    kretaServer.Stop();
                }
                //ha nem fut akkor meg nullozom
                else
                {
                    kretaServer = null;
                }
            }

            HangfireLogger.ShutdownSerilog();

        }

        private void WriteStack()
        {
            try
            {
                HttpRuntime runtime = (HttpRuntime)typeof(HttpRuntime).InvokeMember("_theRuntime",
                    BindingFlags.NonPublic
                    | BindingFlags.Static
                    | BindingFlags.GetField,
                    null,
                    null,
                    null);

                if (runtime == null)
                    return;

                string shutDownMessage = (string)runtime.GetType().InvokeMember(
                    "_shutDownMessage",
                    BindingFlags.NonPublic
                    | BindingFlags.Instance
                    | BindingFlags.GetField,
                    null,
                    runtime,
                    null);

                string shutDownStack = (string)runtime.GetType().InvokeMember(
                    "_shutDownStack",
                    BindingFlags.NonPublic
                    | BindingFlags.Instance
                    | BindingFlags.GetField,
                    null,
                    runtime,
                    null);

                //EventLog-ba iras
                //try
                //{
                //    if (!EventLog.SourceExists(".NETRuntime"))
                //    {
                //        EventLog.CreateEventSource(".NETRuntime", "Application");
                //    }
                //    EventLog log = new EventLog();
                //    log.Source = ".NET Runtime";
                //    log.WriteEntry(string.Format(
                //      "\r\n\r\n_shutDownMessage={0}\r\n\r\n_shutDownStack={1}",
                //    shutDownMessage,
                //    shutDownStack),
                //    EventLogEntryType.Error);
                //}
                //catch { }

                //Fajlba iras
                StackTrace oSt = new StackTrace();
                string message = DateTime.Now + "<br>" + oSt + "<br>" + GetHashCode();
                if (System.IO.Directory.Exists(@"c:\temp"))
                {
                    using (System.IO.StreamWriter oWr = new System.IO.StreamWriter(@"c:\temp\SdaLogs", true))
                    {
                        oWr.WriteLine(message);
                        oWr.WriteLine(
                            $"\r\n\r\n_shutDownMessage={shutDownMessage}\r\n\r\n_shutDownStack={shutDownStack}");
                    }
                }

            }
            catch
            {
            }
        }

        private Assembly CurrentDomain_AssemblyResolve(object sender, ResolveEventArgs args)
        {
            Debug.WriteLine(args.Name);
            return null;
        }

        void Application_Error(object sender, EventArgs e)
        {
            var exception = Server.GetLastError();

            if (exception != null && !ApplicationData.KretaDebug && Request.Url.AbsoluteUri.IndexOf("HibaOldal", StringComparison.OrdinalIgnoreCase) < 0)
            {
                SDAServer.Instance.Logger.ExceptionThrown(exception);

                Response.Redirect("~/HibaOldal");
            }
        }

        void Application_BeginRequest(object sender, EventArgs e)
        {
            var app = sender as HttpApplication;
            if (app != null && app.Context != null)
            {
                app.Context.Response.Headers.Remove("Server");
            }
        }

        void Application_EndRequest(object sender, EventArgs e)
        {
            if (HttpContext.Current.Items.Contains(nameof(UserContext)))
            {
                var context = HttpContext.Current.Items[nameof(UserContext)] as UserContext;
                if (context != null && context.Activated)
                {
                    context.DeActivate();
                }
            }
        }
    }
}