using System;
using System.Collections.Generic;
using System.Linq;
using System.Web;
using System.Web.Mvc;
using System.Web.Routing;

namespace FilmsRUsOnline
{
    public class RouteConfig
    {
        public static void RegisterRoutes(RouteCollection routes)
        {
            routes.IgnoreRoute("{resource}.axd/{*pathInfo}");

            // Original URL schema:
            /*
            routes.MapRoute(
                name: "Default",
                url: "{controller}/{action}/{id}",
                defaults: new { controller = "Films", action = "List", id = UrlParameter.Optional }
            );
            */


            // Improved URL schema below...

            // Match the empty URL (i.e. ~/).
            routes.MapRoute(
                name: null,
                url: "",
                defaults: new { controller = "Films", action = "List", genre = (string)null, pageNumber = 1 }
            );

            // Match ~/PageNumber2, ~/PageNumber123, but not ~/PageNumberXYZ
            routes.MapRoute(
                name: null,
                url: "PageNumber{pageNumber}",
                defaults: new { controller = "Films", action = "List", genre = (string)null },
                constraints: new { pageNumber = @"\d+" }
            );

            // Match ~/Childrens or anything without another /
            routes.MapRoute(
                name: null,
                url: "{genre}",
                defaults: new { controller = "Films", action = "List", pageNumber = 1 }
            );

            // Match ~/Childrens/PageNumber2
            routes.MapRoute(
                name: null,
                url: "{genre}/PageNumber{pageNumber}",
                defaults: new { controller = "Films", action = "List" },
                constraints: new { pageNumber = @"\d+" }
            );

            // Most generic route.
            routes.MapRoute(
                name: null, 
                url: "{controller}/{action}/"
            );
        }
    }
}