/* Transport Security Layer (TLS)
 * Copyright (c) 2003-2004 Carlos Guzman Alvarez
 * 
 * Permission is hereby granted, free of charge, to any person 
 * obtaining a copy of this software and associated documentation 
 * files (the "Software"), to deal in the Software without restriction, 
 * including without limitation the rights to use, copy, modify, merge, 
 * publish, distribute, sublicense, and/or sell copies of the Software, 
 * and to permit persons to whom the Software is furnished to do so, 
 * subject to the following conditions:
 * 
 * The above copyright notice and this permission notice shall be included 
 * in all copies or substantial portions of the Software.
 * 
 * THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, 
 * EXPRESS OR IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES 
 * OF MERCHANTABILITY, FITNESS FOR A PARTICULAR PURPOSE AND 
 * NONINFRINGEMENT. IN NO EVENT SHALL THE AUTHORS OR COPYRIGHT 
 * HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER LIABILITY, 
 * WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM, 
 * OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER 
 * DEALINGS IN THE SOFTWARE.
 */

using System;
using System.Diagnostics;

namespace Mono.Security.Protocol.Tls
{
	internal class DebugHelper
	{
		private static bool isInitialized;

		[Conditional("DEBUG")]
		public static void Initialize()
		{
			if (!isInitialized)
			{
				Debug.Listeners.Add(new TextWriterTraceListener(Console.Out));
				// Debug.Listeners.Add(new TextWriterTraceListener(@"c:\ssl.log"));
				Debug.AutoFlush = true;
				Debug.Indent();

				isInitialized = true;
			}
		}

		[Conditional("DEBUG")]
		public static void WriteLine(string format, params object[] args)
		{
			Initialize();
			Debug.WriteLine(String.Format(format, args));
		}

		[Conditional("DEBUG")]
		public static void WriteLine(string message)
		{
			Initialize();
			Debug.WriteLine(message);
		}

		[Conditional("DEBUG")]
		public static void WriteLine(string message, byte[] buffer)
		{
			Initialize();
			DebugHelper.WriteLine(String.Format("{0} ({1} bytes))", message, buffer.Length));
			DebugHelper.WriteBuffer(buffer);
		}

		[Conditional("DEBUG")]
		public static void WriteBuffer(byte[] buffer)
		{
			Initialize();
			DebugHelper.WriteBuffer(buffer, 0, buffer.Length);
		}

		[Conditional("DEBUG")]
		public static void WriteBuffer(byte[] buffer, int index, int length)
		{
			Initialize();
			for (int i = index; i < length; i += 16)
			{
				int count = (length - i) >= 16 ? 16 : (length - i);
				for (int j = 0; j < count; j++)
				{
					Debug.Write(buffer[i + j].ToString("x2") + " ");
				}
				Debug.WriteLine("");
			}
		}
	}
}