using System.Windows.Browser;
using System.Windows;
using System.Windows.Controls;
using System.Collections.Generic;
using System;
using System.Windows.Media;

namespace Blois.Utils {

	public class ContextMenuEventArgs : BubblingEventArgs {
		private Point pluginPosition;
		public ContextMenuEventArgs(Point pluginPosition, object source)
			: base(source) {

			this.pluginPosition = pluginPosition;
		}

		public Point GetPosition(UIElement element) {
			GeneralTransform transform = element.TransformToVisual((UIElement)Application.Current.RootVisual);

			return transform.Transform(this.pluginPosition);
		}
	}

	/// <summary>
	/// Need to add the context menu handler onto document for Firefox support
	/// Need to add plugin blocker over the div for Firefox support to block SL control from displaying it's context menu
	/// 
	/// </summary>
	[ScriptableType]
	public class ContextMenuGenerator {

		public static readonly BubblingEvent<ContextMenuEventArgs> ContextMenuEvent = new BubblingEvent<ContextMenuEventArgs>("ContextMenu", RoutingStrategy.Bubble);

		private static ContextMenuGenerator helper = new ContextMenuGenerator();
		private HtmlElement pluginBlocker;

		private ContextMenuGenerator() {

			HtmlPage.RegisterScriptableObject("RightMouseClickWorker", this);

			this.pluginBlocker = HtmlPage.Document.CreateElement("div");
			this.pluginBlocker.SetStyleAttribute("width", "100%");
			this.pluginBlocker.SetStyleAttribute("height", "100%");
			this.pluginBlocker.SetStyleAttribute("position", "absolute");
			this.pluginBlocker.SetStyleAttribute("top", "0px");
			this.pluginBlocker.SetStyleAttribute("left", "0px");
			this.pluginBlocker.SetStyleAttribute("zIndex", "100");
			this.pluginBlocker.SetStyleAttribute("display", "none");

			HtmlPage.Plugin.Parent.AppendChild(this.pluginBlocker);




			ScriptObject delegateCreator = (ScriptObject)HtmlPage.Window.Eval(ContextMenuGenerator.mouseHelperScript);
			delegateCreator.Invoke("createCallback", HtmlPage.Plugin);


			HtmlPage.Document.AttachEvent("oncontextmenu", this.OnContextMenu);
		}

		[ScriptableMember]
		public void OnGeckoMouse(ScriptObject e) {

			int button = (int)(double)e.GetProperty("button");

			if (button == 2) {

				if (e.GetProperty("stopPropagation") != null)
					e.Invoke("stopPropagation");
				if (e.GetProperty("preventDefault") != null)
					e.Invoke("preventDefault");

				this.pluginBlocker.SetStyleAttribute("display", "");
			}
		}

		private void OnContextMenu(object sender, HtmlEventArgs e) {

			this.pluginBlocker.SetStyleAttribute("display", "none");


			UIElement rootVisual = (UIElement)Application.Current.RootVisual;

			UIElement firstElement = null;
			foreach (UIElement element in rootVisual.HitTest(new Point(e.OffsetX, e.OffsetY))) {
				firstElement = element;
				break;
			}

			if (firstElement != null) {
				e.PreventDefault();

				FrameworkElement source = (FrameworkElement)firstElement;

				ContextMenuGenerator.ContextMenuEvent.RaiseEvent(new ContextMenuEventArgs(new Point(e.OffsetX, e.OffsetY), source), source);
			}
		}

		private const string mouseHelperScript =
			@"({
				createCallback: function(plugin) {
					if (window.addEventListener) {
						var pluginReference = plugin;
						window.addEventListener(
							'mousedown', 
							function(ev) {
								pluginReference.content.RightMouseClickWorker.OnGeckoMouse(ev);
								return true;
							},
							true
						);
					}
				}
			});";
	}
}