using System;
using System.Configuration;
using System.Web;
using System.Xml;

namespace Kreta.Naplo.WebApi
{
    public class WebApiApplication : HttpApplication
    {
        private static KretaServer.KretaServer s_kretaServer;

        protected void Application_Start()
        {
            ServerStarter();
        }

        protected void Application_End(object sender, EventArgs e)
        {
            if (s_kretaServer != null)
            {
                if (s_kretaServer.IsRunning)
                {
                    s_kretaServer.Stop();
                }
                else
                {
#pragma warning disable S2696 // Instance members should not write to "static" fields
                    s_kretaServer = null;
#pragma warning restore S2696 // Instance members should not write to "static" fields
                }
            }
        }

        [System.Diagnostics.CodeAnalysis.SuppressMessage("Microsoft.Design", "CA1031:DoNotCatchGeneralExceptionTypes")]
        private static void ServerStarter()
        {
            if (s_kretaServer == null || !s_kretaServer.IsRunning)
            {
                XmlNode fullnode = (XmlNode)ConfigurationManager.GetSection("ServerConfig");
                XmlDocument doc = new XmlDocument();
                doc.LoadXml(fullnode.SelectSingleNode("/ServerConfig/config").OuterXml);

                s_kretaServer = s_kretaServer ?? new KretaServer.KretaServer(doc.DocumentElement);

                try
                {
                    s_kretaServer.Start();
                }
#pragma warning disable S2221 // "Exception" should not be caught when not required by called methods
                catch
#pragma warning restore S2221 // "Exception" should not be caught when not required by called methods
                {
#pragma warning disable S3626 // Jump statements should not be redundant
                    return;
#pragma warning restore S3626 // Jump statements should not be redundant
                }
            }
        }
    }
}