using System;
using System.Collections.Generic;
using System.Linq;
using System.ServiceModel;
using System.Text;
using log4net.Appender;
using log4net.Core;

namespace LiveLogger4Log4Net
{
	public class WCFAppender : AppenderSkeleton
	{
		#region Public Instance Constructors

		private ServiceHost host;

		/// <summary>
		/// Initializes a new instance of the <see cref="WCFAppender" /> class.
		/// </summary>
		/// <remarks>
		/// The default constructor start the ServiceHost to listen for registration.
		/// </remarks>
		public WCFAppender()
		{
			try
			{
				host = new ServiceHost(typeof(AppenderService));
				host.Open();
			}
			catch (Exception ex)
			{

				throw;
			}
		}

		#endregion Public Instance Constructors

		#region Override implementation of AppenderSkeleton

		/// <summary>
		/// This method is called by the <see cref="AppenderSkeleton.DoAppend(LoggingEvent)"/> method.
		/// It calls static method <see cref="AppenderService.Append"/> that is used to notify the log
		/// to all registered clients.
		/// </summary>
		/// <param name="loggingEvent">The event to log.</param>
		/// <remarks>
		/// <para>
		/// Send the event to all registered listener.
		/// </para>
		/// <para>
		/// Exceptions are passed to the <see cref="AppenderSkeleton.ErrorHandler"/>.
		/// </para>
		/// </remarks>
		protected override void Append(LoggingEvent loggingEvent) 
		{
			AppenderService.Append(loggingEvent);
		}

		/// <summary>
		/// This appender requires a <see cref="log4net.Layout"/> to be set.
		/// </summary>
		/// <value><c>true</c></value>
		/// <remarks>
		/// <para>
		/// This appender requires a <see cref="log4net.Layout"/> to be set.
		/// </para>
		/// </remarks>
		override protected bool RequiresLayout
		{
			get { return true; }
		}

		/// <summary>
		/// Close the appender, close the host and call base version.
		/// </summary>
		protected override void OnClose()
		{
			host.Close();
			base.OnClose();
		}

		#endregion Override implementation of AppenderSkeleton

	}
}