using System;
using System.Data;
using System.Configuration;
using System.Web;
using System.Web.Security;
using System.Web.UI;
using System.Web.UI.WebControls;
using System.Web.UI.WebControls.WebParts;
using System.Web.UI.HtmlControls;
using log4net;

namespace BugNET.BusinessLogicLayer
{
    /// <summary>
    /// Logging Class
    /// </summary>
    public class Logging
    {

        /// <summary>
        /// Configures the logging.
        /// </summary>
        public static void ConfigureLogging()
        {
            ConfigureAdoNetAppender();
            //if email notification of errors are enabled create a smtp logging appender.
            if (Convert.ToBoolean(HostSetting.GetHostSetting("EmailErrors")))
                ConfigureEmailLoggingAppender();

        }

        /// <summary>
        /// Configures the ADO net appender.
        /// </summary>
        private static void ConfigureAdoNetAppender()
        {
            // Get the Hierarchy object that organizes the loggers
            log4net.Repository.Hierarchy.Hierarchy hier =
              log4net.LogManager.GetRepository() as log4net.Repository.Hierarchy.Hierarchy;

            if (hier != null)
            {
                //get ADONetAppender
                log4net.Appender.AdoNetAppender adoAppender =
                  (log4net.Appender.AdoNetAppender)hier.Root.GetAppender("AdoNetAppender");

                if (adoAppender != null)
                {
                    adoAppender.ConnectionString = ConfigurationManager.ConnectionStrings["BugNET"].ConnectionString;
                    adoAppender.ActivateOptions(); //refresh settings of appender
                }
            }
        }

        /// <summary>
        /// Adds the email logging appender.
        /// </summary>
        public static void ConfigureEmailLoggingAppender()
        {
            log4net.Repository.Hierarchy.Hierarchy hier =
            (log4net.Repository.Hierarchy.Hierarchy)log4net.LogManager.GetRepository();

            if (hier != null)
            {
                log4net.Appender.SmtpAppender appender = null;
                appender = (log4net.Appender.SmtpAppender)hier.Root.GetAppender("SmtpAppender");

                if (appender == null)
                    appender = new log4net.Appender.SmtpAppender();

                appender.Name = "SmtpAppender";
                appender.From = HostSetting.GetHostSetting("HostEmailAddress");
                appender.To = HostSetting.GetHostSetting("ErrorLoggingEmailAddress");
                appender.Subject = "BugNET Error";
                appender.SmtpHost = HostSetting.GetHostSetting("SMTPServer");
                appender.Priority = System.Net.Mail.MailPriority.High;
                appender.Threshold = log4net.Core.Level.Error;
                appender.BufferSize = 0;

                //create patternlayout
                log4net.Layout.PatternLayout patternLayout = new
                log4net.Layout.PatternLayout("%newline%date [%thread] %-5level %logger [%property{NDC}] - %message%newline%newline%newline");
                patternLayout.ActivateOptions();
                appender.Layout = patternLayout;
                appender.ActivateOptions();

                //add appender to root logger
                hier.Root.AddAppender(appender);
            }

        }

        /// <summary>
        /// Removes the email logging appender.
        /// </summary>
        public static void RemoveEmailLoggingAppender()
        {
            log4net.Repository.Hierarchy.Hierarchy hier =
             log4net.LogManager.GetRepository() as log4net.Repository.Hierarchy.Hierarchy;

            if (hier != null)
            {
                log4net.Appender.SmtpAppender appender =
                  (log4net.Appender.SmtpAppender)hier.Root.GetAppender("SmtpAppender");

                if (appender != null)
                    hier.Root.RemoveAppender("SmtpAppender");
            }
        }
    }
}