// Copyright 2003-2004 The Apache Software Foundation
// 
// Licensed under the Apache License, Version 2.0 (the "License");
// you may not use this file except in compliance with the License.
// You may obtain a copy of the License at
// 
//     http://www.apache.org/licenses/LICENSE-2.0
// 
// Unless required by applicable law or agreed to in writing, software
// distributed under the License is distributed on an "AS IS" BASIS,
// WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
// See the License for the specific language governing permissions and
// limitations under the License.

namespace Apache.Avalon.Framework
{
	using System;
	using log4net;
	/// <summary>
	/// The default log4net wrapper class for Logger.
	/// </summary>
	public class Log4netLogger: ILogger
	{
		/// <summary>
		/// underlying implementation
		/// </summary>
		private ILog m_logger;

		/// <summary>
		/// Category name
		/// </summary>
		private string m_name;

		/// <summary>
		/// Creates a m_logger that delegates to specified category.
		/// </summary>
		/// <param name="logImpl">The ILog to delegate to.</param>
		/// <param name="name">The current category name.</param>
		public Log4netLogger(ILog logImpl, string name)
		{
			m_logger = logImpl;
			m_name = name;
		}

		/// <summary>
		/// Logs a debug message.
		/// </summary>
		/// <param name="message">The Message</param>
		public void Debug(string message )
		{
			m_logger.Debug(message);
		}

		/// <summary>
		/// Logs a debug message. 
		/// </summary>
		/// <param name="message">The Message</param>
		/// <param name="exception">The Exception</param>
		public void Debug(string message, Exception exception)
		{
			m_logger.Debug( message, exception );
		}

		/// <summary>
		/// Logs a debug message.
		/// </summary>
		/// <param name="format">Message format</param>
		/// <param name="args">Array of objects to write using format</param>
		public void Debug( string format, params Object[] args )
		{
			Debug(String.Format(format, args));
		}

		/// <summary>
		/// Determines if messages of priority "debug" will be logged.
		/// </summary>
		/// <value>True if "debug" messages will be logged.</value> 
		public bool IsDebugEnabled
		{
			get
			{
				return m_logger.IsDebugEnabled;
			}
		}

		/// <summary>
		/// Logs an info message.
		/// </summary>
		/// <param name="message">The Message</param>
		public void Info( string message )
		{
			m_logger.Info(message);
		}

		/// <summary>
		/// Logs an info message. 
		/// </summary>
		/// <param name="message">The Message</param>
		/// <param name="exception">The Exception</param>
		public void Info( string message, Exception exception)
		{
			m_logger.Info( message, exception);
		}

		/// <summary>
		/// Logs an info message.
		/// </summary>
		/// <param name="format">Message format</param>
		/// <param name="args">Array of objects to write using format</param>
		public void Info( string format, params Object[] args )
		{
			Info(String.Format(format, args));
		}

		/// <summary>
		/// Determines if messages of priority "info" will be logged.
		/// </summary>
		/// <value>True if "info" messages will be logged.</value>
		public bool IsInfoEnabled
		{
			get
			{
				return m_logger.IsInfoEnabled;
			}
		}
		/// <summary>
		/// Logs a warn message.
		/// </summary>
		/// <param name="message">The Message</param>
		public void Warn(string message )
		{
			m_logger.Warn( message );
		}

		/// <summary>
		/// Logs a warn message. 
		/// </summary>
		/// <param name="message">The Message</param>
		/// <param name="exception">The Exception</param>
		public void Warn(string message, Exception exception)
		{
			m_logger.Warn( message, exception );
		}

		/// <summary>
		/// Logs a warn message.
		/// </summary>
		/// <param name="format">Message format</param>
		/// <param name="args">Array of objects to write using format</param>
		public void Warn( string format, params Object[] args )
		{
			Warn(String.Format(format, args));
		}

		/// <summary>
		/// Determines if messages of priority "warn" will be logged.
		/// </summary>
		/// <value>True if "warn" messages will be logged.</value>
		public bool IsWarnEnabled
		{
			get
			{
				return m_logger.IsWarnEnabled;
			}
		}

		/// <summary>
		/// Logs an error message.
		/// </summary>
		/// <param name="message">The Message</param>
		public void Error(string message )
		{
			m_logger.Error( message );
		}

		/// <summary>
		/// Logs an error message. 
		/// </summary>
		/// <param name="message">The Message</param>
		/// <param name="exception">The Exception</param>
		public void Error(string message, Exception exception)
		{
			m_logger.Error( message, exception );
		}

		/// <summary>
		/// Logs an error message.
		/// </summary>
		/// <param name="format">Message format</param>
		/// <param name="args">Array of objects to write using format</param>
		public void Error( string format, params Object[] args )
		{
			Error(String.Format(format, args));
		}

		/// <summary>
		/// Determines if messages of priority "error" will be logged.
		/// </summary>
		/// <value>True if "error" messages will be logged.</value>
		public bool IsErrorEnabled
		{
			get
			{
				return m_logger.IsErrorEnabled;
			}
		}

		/// <summary>
		/// Logs a fatal error message.
		/// </summary>
		/// <param name="message">The Message</param>
		public void FatalError(string message )
		{
			m_logger.Fatal( message );
		}

		/// <summary>
		/// Logs a fatal error message.
		/// </summary>
		/// <param name="message">The Message</param>
		/// <param name="exception">The Exception</param>
		public void FatalError(string message, Exception exception)
		{
			m_logger.Fatal( message, exception);
		}

		/// <summary>
		/// Logs a fatal error message.
		/// </summary>
		/// <param name="format">Message format</param>
		/// <param name="args">Array of objects to write using format</param>
		public void FatalError( string format, params Object[] args )
		{
			FatalError(format, args);
		}

		/// <summary>
		/// Determines if messages of priority "fatalError" will be logged.
		/// </summary>
		/// <value>True if "fatalError" messages will be logged.</value>
		public bool IsFatalErrorEnabled
		{
			get 
			{
				return m_logger.IsFatalEnabled; 
			}
		}

		/// <summary>
		/// Create a new child logger.
		/// The name of the child logger is [current-loggers-name].[passed-in-name]
		/// </summary>
		/// <param name="name">The Subname of this logger.</param>
		/// <returns>The New ILogger instance.</returns> 
		/// <exception cref="System.ArgumentException">If the name has an empty element name.</exception>
		public ILogger CreateChildLogger(string name )
		{
			string newName = m_name + "." + name;
			return new Log4netLogger( LogManager.GetLogger( newName ), newName );
		}
	}
}