using NewControlPanel.Data;
using System;
using System.Collections.Generic;
using System.Data.Entity;
using System.Linq;
using System.Reflection;
using System.Web;
using System.Web.Http;
using System.Web.Mvc;
using System.Web.Optimization;
using System.Web.Routing;
using System.Web.SessionState;

namespace NewControlPanel
{
	public class MvcApplication : System.Web.HttpApplication
	{
		public class MyControllerFactory : IControllerFactory
		{
			public IController CreateController(RequestContext requestContext, string controllerName)
			{
				var paths = new[]
				{
					$"{nameof(NewControlPanel)}.{nameof(Process)}.{controllerName}.Process",
					$"{nameof(NewControlPanel)}.{nameof(Process)}.{controllerName}.{controllerName}",
					$"{nameof(NewControlPanel)}.{nameof(Process)}.{controllerName}.{controllerName}Controller",
					$"{nameof(NewControlPanel)}.Controllers.{controllerName}",
					$"{nameof(NewControlPanel)}.Controllers.{controllerName}Controller",
				};
				var type = TryFind(paths);

				if (type == null)
				{
					var e = CreateController(requestContext, "home");
					var m = e as MyController;
					if (m != null)
					{
						m.AddError($"Controller for {nameof(controllerName)}:{controllerName} not found, reverted to home controller");
					}
					return e;
				}

				var c = Activator.CreateInstance(type) as IController;
				//c.Execute(requestContext);
				return c;
			}

			public Type TryFind(params string[] typeNames)
			{
				foreach (var typeName in typeNames)
				{
					foreach (var a in AppDomain.CurrentDomain.GetAssemblies())
					{
						var type = a.GetType(typeName, false, true);
						if (type != null) return type;
					}
				}
				return null;
			}

			public SessionStateBehavior GetControllerSessionBehavior(RequestContext requestContext, string controllerName)
			{
				return SessionStateBehavior.Default;
			}

			public void ReleaseController(IController controller)
			{
			}
		}

		string[] paths = new[]
		{
			// {0} is target view name, {1} - controller name and {2} - area name.
			"~/Process/{1}/{0}.cshtml",
			"~/Process/Shared/{0}.cshtml",
			"~/Process/Home/{0}.cshtml",
		};

		protected void Application_Start()
		{
			Data.MyDbContext.Init();

			AreaRegistration.RegisterAllAreas();
			GlobalConfiguration.Configure(WebApiConfig.Register);
			FilterConfig.RegisterGlobalFilters(GlobalFilters.Filters);
			RouteConfig.RegisterRoutes(RouteTable.Routes);
			BundleConfig.RegisterBundles(BundleTable.Bundles);

			ControllerBuilder.Current.SetControllerFactory(new MyControllerFactory());

			ViewEngines.Engines.Clear();
			ViewEngines.Engines.Clear();
			var razorEngine = new RazorViewEngine();
			razorEngine.MasterLocationFormats = razorEngine.MasterLocationFormats.Concat(paths).ToArray();
			razorEngine.ViewLocationFormats = razorEngine.ViewLocationFormats.Concat(paths).ToArray();
			razorEngine.PartialViewLocationFormats = razorEngine.PartialViewLocationFormats.Concat(paths).ToArray();
			ViewEngines.Engines.Add(razorEngine);
		}
	}
}