using System.IO;
using System.Text;
using System.Web;
using System.Web.Mvc;
using System.Web.Routing;

namespace Website
{
    public class ApplicationRoutes
    {
        private readonly RouteCollection routes;

        public ApplicationRoutes(RouteCollection routes)
        {
            this.routes = routes;
        }

        public void Register()
        {
            routes.IgnoreRoute("{resource}.axd/{*pathInfo}");
            routes.IgnoreRoute("{config}.config/{*pathInfo}");

            routes.MapRoute("Content Pages", "{pageName}",
                new { controller = "Home", action = "ContentPage", pageName = "Home" },
                new { pageName = getHomeConstraints() }
            );
            routes.MapRoute("Static Content", "{action}/{*path}",
                new { controller = "StaticContent" },
                new { action = "(scripts|styles)" }
            );
            routes.MapRoute("Redirects (by code)", "go/{*code}",
                new { controller = "Redirects", action = "RedirectByCode" }
            );
            routes.MapRoute("Error Page", "error/{statusCode}",
                new { controller = "Error", action = "Index", statusCode = "General" }
            );
            routes.MapRoute("JSON Requests", "{pageName}/{renderMode}",
                new { controller = "Home", action = "ContentPage", pageName = "Index" },
                new { renderMode = "(json|xml|partial)" }
            );

            // Send any old links (with the .mvc extension) to the RetroContent action
            routes.MapRoute("Retro", "{pageName}.mvc",
                new { controller = "Home", action = "RetroContent" }
            );

            // NOTE: I've explicitly removed the catch-all route and replaced it with my redirect controller
            routes.MapRoute("Redirects (by path)", "{*path}",
                new { controller = "Redirects", action = "RedirectByPath" },
                new { path = "(downloads|demos).*" }
            );
        }

        private static string getHomeConstraints()
        {
            var views = new StringBuilder("(home");

            // Cycle through the /Views/Home directory and add all of the views therein
            // to the list of accepted view names
            var viewsDirectory = new DirectoryInfo(HttpContext.Current.Server.MapPath("~/Views/Home"));
            foreach (var view in viewsDirectory.GetFiles("*.aspx"))
                views.AppendFormat("|{0}", view.Name.Substring(0, view.Name.LastIndexOf(".aspx")));

            views.Append(")");

            return views.ToString();
        }
    }
}