using System;
using System.IO;
using System.Collections;
using System.Reflection;
using System.Threading;

using IBatisNet.Common.Utilities;

using IBatisNet.Common.Test.NUnit;

using NUnit.Framework;

namespace IBatisNet.Common.Test.NUnit.CommonTests.ConfigWatcher
{
	/// <summary>
	/// Summary description for ConfigWatcherTest.
	/// </summary>
		[TestFixture] 
	public class ConfigWatcherTest
	{
			private bool _hasChanged = false;

			#region SetUp & TearDown

			/// <summary>
			/// SetUp
			/// </summary>
			[SetUp] 
			public void SetUp() 
			{
				_hasChanged = false;		
			}


			/// <summary>
			/// TearDown
			/// </summary>
			[TearDown] 
			public void Dispose()
			{ 
			} 

			#endregion

			#region Test ConfigurationWatcher

			/// <summary>
			/// ConfigurationWatcher Test
			/// </summary>
			[Test] 
			public void ConfigurationWatcherTest() 
			{
				Assembly a = Assembly.GetExecutingAssembly();
				Uri uri = new System.Uri(a.CodeBase); 
				string binDirectory = Path.GetDirectoryName(uri.LocalPath);
				string fileName = "test.config";

				// Configure a watcher
				ConfigureHandler configureDelegate = new ConfigureHandler( Configure );
				ConfigWatcherHandler.ClearFilesMonitored();
				ConfigWatcherHandler.AddFileToWatch( Resources.GetFileInfo( fileName) );

				TimerCallback callBakDelegate = new TimerCallback( ConfigWatcherTest.OnConfigFileChange );

				StateConfig state = new StateConfig();
				state.FileName = fileName;
				state.ConfigureHandler = configureDelegate;

				new ConfigWatcherHandler( callBakDelegate, state );

				FileInfo fi = Resources.GetFileInfo( fileName);
				fi.LastWriteTime = DateTime.Now;

				fi.Refresh();

				// Let's give a small bit of time for the change to propagate.
				// The ConfigWatcherHandler class has a timer which 
				// waits for 500 Millis before delivering
				// the event notification.
				System.Threading.Thread.Sleep(600); 

				Assert.IsTrue(_hasChanged);
			}

			protected void Configure(object obj)
			{
				_hasChanged = true;	
			}

			/// <summary>
			/// Called when the configuration has been updated. 
			/// </summary>
			/// <param name="obj">The state config.</param>
			public static void OnConfigFileChange(object obj)
			{
				StateConfig state = (StateConfig)obj;
				state.ConfigureHandler(null);
			}


			#endregion
	}
}