#region License

// Copyright (c) 2010, Jasper Yeh.
// All rights reserved.
//
// Redistribution and use in source and binary forms, with or without modification, 
// are permitted provided that the following conditions are met:
//
//    * Redistributions of source code must retain the above copyright notice, 
//      this list of conditions and the following disclaimer.
//    * Redistributions in binary form must reproduce the above copyright notice, 
//      this list of conditions and the following disclaimer in the documentation 
//      and/or other materials provided with the distribution.
//    * Neither the name of ClearCanvas Inc. nor the names of its contributors 
//      may be used to endorse or promote products derived from this software without 
//      specific prior written permission.
//
// THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS "AS IS" 
// AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, 
// THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR 
// PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT OWNER OR 
// CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, 
// OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE 
// GOODS OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) 
// HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, 
// STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN 
// ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY 
// OF SUCH DAMAGE.

#endregion

using System;
using System.Configuration;
using System.Reflection;
using System.Xml;
using ClearCanvas.Common;
using ClearCanvas.Desktop;
using ClearCanvas.Desktop.Actions;
using ClearCanvas.Desktop.Tools;

namespace Nullstack.ClearCanvasEx.DevTools.OtherTools
{
	/// <summary>
	/// A tool for deleting the action model
	/// </summary>
	[GroupHint("flush", "Nullstack.ClearCanvasEx.DevTools.ActionModel.Delete")]
	[MenuAction("flush", "global-menus/mnDebug/mnActionModels/mnDelete", "Flush")]
	[ExtensionOf(typeof (DesktopToolExtensionPoint))]
	public class ActionModelTool : Tool<IDesktopToolContext>
	{
		private static FieldInfo field;
		private static object instance;
		private static string defaultValue;

		public override void Initialize()
		{
			base.Initialize();

			// initialization involves finding the internal class ActionModelSettings by reflection and recording the information we find

			Assembly assembly = Assembly.GetAssembly(typeof (Application));
			Type type = assembly.GetType("ClearCanvas.Desktop.Actions.ActionModelSettings");
			PropertyInfo propDefault = type.GetProperty("Default");
			PropertyInfo propActionModelXml = type.GetProperty("ActionModelsXml");

			// do discovery of default value tagged to the property
			DefaultSettingValueAttribute[] attribs = (DefaultSettingValueAttribute[]) propActionModelXml.GetCustomAttributes(typeof (DefaultSettingValueAttribute), false);
			if (attribs.Length > 0)
			{
				defaultValue = attribs[0].Value;
			}
			else
			{
				defaultValue = "<?xml version=\"1.0\" encoding=\"utf-16\"?>\r\n<action-models />";
			}

			// do discovery of the default settings instance
			instance = propDefault.GetValue(null, null);

			field = type.GetField("_actionModelXmlDoc", BindingFlags.NonPublic | BindingFlags.Instance);
		}

		/// <summary>
		/// Clears the action model.
		/// </summary>
		public void Flush()
		{
			if (Application.ShowMessageBox(SR.msgConfirmDeleteActionModel, MessageBoxActions.YesNo) == DialogBoxAction.No)
				return;

			XmlDocument newmodel = new XmlDocument();
			newmodel.LoadXml(defaultValue);
			field.SetValue(instance, newmodel);

			Application.ShowMessageBox(SR.msgActionModelDeleted, MessageBoxActions.Ok);
		}
	}
}