using System;
using System.ComponentModel;
using System.ComponentModel.Design;
using System.Reflection;
// ReSharper disable ArrangeAccessorOwnerBody

namespace mRemoteNG.Tools
{
	public class PropertyGridCommandSite : IMenuCommandService, ISite
	{
	    private readonly object TheObject;
		public PropertyGridCommandSite(object @object)
		{
			TheObject = @object;
		}
			
        public DesignerVerbCollection Verbs
		{
			get
			{
				var objectVerbs = new DesignerVerbCollection();
				// ReSharper disable VBPossibleMistakenCallToGetType.2
				var methods = TheObject.GetType().GetMethods(BindingFlags.Public | BindingFlags.Instance);
				// ReSharper restore VBPossibleMistakenCallToGetType.2
				foreach (var method in methods)
				{
					var commandAttributes = method.GetCustomAttributes(typeof(CommandAttribute), true);
					if (commandAttributes.Length == 0)
					{
						continue;
					}
						
					var commandAttribute = (CommandAttribute) commandAttributes[0];
					if (!commandAttribute.Command)
					{
						continue;
					}
						
					var displayName = method.Name;
					var displayNameAttributes = method.GetCustomAttributes(typeof(DisplayNameAttribute), true);
					if (displayNameAttributes.Length != 0)
					{
						var displayNameAttribute = (DisplayNameAttribute) displayNameAttributes[0];
						if (!string.IsNullOrEmpty(displayNameAttribute.DisplayName))
						{
							displayName = displayNameAttribute.DisplayName;
						}
					}
					objectVerbs.Add(new DesignerVerb(displayName, new EventHandler(VerbEventHandler)));
				}
					
				return objectVerbs;
			}
		}
			
		private void VerbEventHandler(object sender, EventArgs e)
		{
			var verb = sender as DesignerVerb;
			if (verb == null)
			{
				return;
			}
			// ReSharper disable VBPossibleMistakenCallToGetType.2
			var methods = TheObject.GetType().GetMethods(BindingFlags.Public | BindingFlags.Instance);
			// ReSharper restore VBPossibleMistakenCallToGetType.2
			foreach (var method in methods)
			{
				var commandAttributes = method.GetCustomAttributes(typeof(CommandAttribute), true);
				if (commandAttributes.Length == 0)
				{
					continue;
				}
					
				var commandAttribute = (CommandAttribute) commandAttributes[0];
				if (!commandAttribute.Command)
				{
					continue;
				}
					
				var displayName = method.Name;
				var displayNameAttributes = method.GetCustomAttributes(typeof(DisplayNameAttribute), true);
				if (displayNameAttributes.Length != 0)
				{
					var displayNameAttribute = (DisplayNameAttribute) displayNameAttributes[0];
					if (!string.IsNullOrEmpty(displayNameAttribute.DisplayName))
					{
						displayName = displayNameAttribute.DisplayName;
					}
				}

			    if (verb.Text != displayName) continue;
			    method.Invoke(TheObject, null);
			    return;
			}
		}
			
		public object GetService(Type serviceType)
		{
		    return serviceType == typeof(IMenuCommandService) ? this : null;
		}
			
        public IComponent Component
		{
			get { throw new NotSupportedException(); }
		}
			
        public IContainer Container
        {
            get { return null; }
        }

	    public bool DesignMode
	    {
	        get { return true; }
	    }

	    public string Name
		{
			get { throw new NotSupportedException(); }
			set { throw new NotSupportedException(); }
		}
			
		public void AddCommand(MenuCommand command)
		{
			throw new NotSupportedException();
		}
			
		public void AddVerb(DesignerVerb verb)
		{
			throw new NotSupportedException();
		}
			
		public MenuCommand FindCommand(CommandID commandId)
		{
			throw new NotSupportedException();
		}
			
		public bool GlobalInvoke(CommandID commandId)
		{
			throw new NotSupportedException();
		}
			
		public void RemoveCommand(MenuCommand command)
		{
			throw new NotSupportedException();
		}
			
		public void RemoveVerb(DesignerVerb verb)
		{
			throw new NotSupportedException();
		}
			
		public void ShowContextMenu(CommandID menuId, int x, int y)
		{
			throw new NotSupportedException();
		}
			
	}
		
	public class CommandAttribute : Attribute
	{
	    public bool Command { get; set; }

	    public CommandAttribute(bool isCommand = true)
		{
			Command = isCommand;
		}
	}
}