using System;
using System.Collections.Generic;
using System.Configuration;
using System.Linq;
using System.Web;
using System.Web.Hosting;
using System.Web.Http;
using System.Web.Mvc;
using System.Web.Optimization;
using System.Web.Routing;
using System.Web.Security;

using Fab2ApprovalSystem.DMO;
using Fab2ApprovalSystem.JobSchedules;
using Fab2ApprovalSystem.Misc;
using Fab2ApprovalSystem.Models;

namespace Fab2ApprovalSystem;

public class MvcApplication : System.Web.HttpApplication {

    protected void Application_Start() {
        AreaRegistration.RegisterAllAreas();
        GlobalConfiguration.Configure(WebApiConfig.Register);
        FilterConfig.RegisterGlobalFilters(GlobalFilters.Filters);
        RouteConfig.RegisterRoutes(RouteTable.Routes);
        BundleConfig.RegisterBundles(BundleTable.Bundles);

        string hostName = System.Net.Dns.GetHostEntry("").HostName;
        GlobalVars.IS_INFINEON_DOMAIN = hostName.ToLower().Contains("infineon");

        string DevWebSiteUrl = ConfigurationManager.AppSettings["DevWebSiteURL"].ToString();
        string ProdWebSiteUrlEC = ConfigurationManager.AppSettings["ProdWebSiteURLEC"].ToString();
        string ProdWebSiteUrlStealth = ConfigurationManager.AppSettings["ProdWebSiteURLStealth"].ToString();

        GlobalVars.SENDER_EMAIL = "FabApprovalSystem@Infineon.com"; // put in the Config File
        if (ConfigurationManager.AppSettings["Notification Sender"] != null)
            GlobalVars.SENDER_EMAIL = ConfigurationManager.AppSettings["Notification Sender"].ToString();

        GlobalVars.NDriveURL = ConfigurationManager.AppSettings["NDrive"].ToString();
        GlobalVars.WSR_URL = ConfigurationManager.AppSettings["WSR_URL"].ToString();
        GlobalVars.CA_BlankFormsLocation = ConfigurationManager.AppSettings["CA_BlankFormsLocation"].ToString();

#if (!DEBUG)
        OOOTrainingReportJobSchedule.Start();

        if (GlobalVars.IS_INFINEON_DOMAIN) {
            GlobalVars.DB_CONNECTION_STRING = ConfigurationManager.ConnectionStrings["FabApprovalConnectionStealth"].ConnectionString.ToString();
            GlobalVars.hostURL = @"https://" + ProdWebSiteUrlStealth;
        } else {
            GlobalVars.DB_CONNECTION_STRING = ConfigurationManager.ConnectionStrings["FabApprovalConnectionEC"].ConnectionString.ToString();
            GlobalVars.hostURL = @"https://" + ProdWebSiteUrlEC;
        }
#else
        GlobalVars.DB_CONNECTION_STRING = ConfigurationManager.ConnectionStrings["FabApprovalConnectionDev"].ConnectionString.ToString();
        GlobalVars.hostURL = @"https://" + DevWebSiteUrl;
#endif
        GlobalVars.DBConnection = GlobalVars.DB_CONNECTION_STRING.ToUpper().Contains("TEST") ? "TEST" : GlobalVars.DB_CONNECTION_STRING.ToUpper().Contains("QUALITY") ? "QUALITY" : "PROD";

        GlobalVars.AppSettings = Models.AppSettings.LoadConfigurationManager();
    }

    protected void Application_EndRequest() {
        var context = new HttpContextWrapper(Context);

        //Do a direct 401 unauthorized
        if (Context.Response.StatusCode == 301 && context.Request.IsAjaxRequest()) {
            Context.Response.Clear();
            Context.Response.StatusCode = 401;
        } else if (FormsAuthentication.IsEnabled && context.Response.StatusCode == 302
              && context.Request.IsAjaxRequest()) {
            context.Response.Clear();
            context.Response.StatusCode = 401;
        }
    }

    protected void Session_Start(object sender, EventArgs e) {
        Session[GlobalVars.ECN_VIEW_OPTION] = "Pending Approvals";
    }

    protected void Session_End(object sender, EventArgs e) {
        //FormsAuthentication.SignOut();
        try {
            Session[GlobalVars.SESSION_USERNAME] = "";
            Session[GlobalVars.SESSION_USERID] = "";
            Session[GlobalVars.IS_ADMIN] = "";
        } catch (Exception ex) {
            Functions.WriteEvent(null, @User.Identity.Name + "\r\n Session Closed - \r\n" + ex.Message.ToString(), System.Diagnostics.EventLogEntryType.Error);
        }
    }

    // This code is to allow hyperlinks from Office products to load the site without always forcing the user to log in
    // It makes the browser reload the page so that the session cookies are sent properly
    private static string MSUserAgentsRegex = @"[^\w](Word|Excel|PowerPoint|ms-office)([^\w]|\z)";
    protected void Application_OnPostAuthenticateRequest(object sender, EventArgs e) {
        if (System.Text.RegularExpressions.Regex.IsMatch(Request.UserAgent, MSUserAgentsRegex)) {
            Response.Write("<html><head><meta http-equiv='refresh' content='0'/></head><body></body></html>");
            Response.End();
        }
    }

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

        var exString = "Caught unhandled exception:\r\n";
        exString += String.Format("User: {0}\r\n", @User.Identity.Name);
        Exception x = ex;
        while (x != null) {
            exString += x.ToString();
            exString += "=====\r\n";
            x = x.InnerException;
        }

        try {
            if (exString.Length > 500)
                exString = exString.Substring(0, 500);

            EventLogDMO.Add(new Fab2ApprovalSystem.Models.WinEventLog() {
                UserID = @User.Identity.Name,
                OperationType = "Error",
                Comments = exString
            });
        } catch (Exception ex2) {
            Misc.Functions.WriteEvent(null, "Failed to write error to event log in database: " + ex2.ToString(), System.Diagnostics.EventLogEntryType.Error);
        }
    }

}