using System;

using System.Web.Mvc;

using Umbraco.Core;



namespace Umbraco.Web.Mvc

{

	/// <summary>

	/// Used by posted forms to proxy the result to the page in which the current URL matches on

	/// </summary>

	public class UmbracoPageResult : ActionResult

	{

		public override void ExecuteResult(ControllerContext context)

		{



			//since we could be returning the current page from a surface controller posted values in which the routing values are changed, we 

			//need to revert these values back to nothing in order for the normal page to render again.

			context.RouteData.DataTokens["area"] = null;

			context.RouteData.DataTokens["Namespaces"] = null;



			//validate that the current page execution is not being handled by the normal umbraco routing system

			if (!context.RouteData.DataTokens.ContainsKey("umbraco-route-def"))

			{

				throw new InvalidOperationException("Can only use " + typeof(UmbracoPageResult).Name + " in the context of an Http POST when using a SurfaceController form");

			}



			var routeDef = (RouteDefinition)context.RouteData.DataTokens["umbraco-route-def"];



			//ensure the original template is reset

			context.RouteData.Values["action"] = routeDef.ActionName;



			//ensure ModelState is copied across

			routeDef.Controller.ViewData.ModelState.Merge(context.Controller.ViewData.ModelState);



			//ensure TempData and ViewData is copied across

			foreach (var d in context.Controller.ViewData)

				routeDef.Controller.ViewData[d.Key] = d.Value;

			routeDef.Controller.TempData = context.Controller.TempData;



			using (DisposableTimer.TraceDuration<UmbracoPageResult>("Executing Umbraco RouteDefinition controller", "Finished"))

			{

				try

				{

					((IController)routeDef.Controller).Execute(context.RequestContext);

				}

				finally

				{

					routeDef.Controller.DisposeIfDisposable();

				}

			}



		}

	}

}