using System;
using System.Collections.Generic;
using System.Linq;
using System.Text.RegularExpressions;
using System.Web.Routing;
using JetBrains.Annotations;
using Orchard.Blogs.Models;
using Orchard.Blogs.Services;
using Orchard.ContentManagement;
using Orchard.ContentManagement.Drivers;
using Orchard.Core.Common.Models;
using Orchard.Core.Common.Services;
using Orchard.Localization;
using Orchard.Mvc.ViewModels;
using Orchard.UI.Notify;

namespace Orchard.Blogs.Controllers {
    [UsedImplicitly]
    public class BlogDriver : ContentItemDriver<Blog> {
        public IOrchardServices Services { get; set; }

        public readonly static ContentType ContentType = new ContentType {
            Name = "blog",
            DisplayName = "Blog"
        };

        private readonly IContentManager _contentManager;
        private readonly IBlogService _blogService;
        private readonly IBlogPostService _blogPostService;
        private readonly IRoutableService _routableService;

        public BlogDriver(IOrchardServices services, IContentManager contentManager, IBlogService blogService, IBlogPostService blogPostService, IRoutableService routableService) {
            Services = services;
            _contentManager = contentManager;
            _blogService = blogService;
            _blogPostService = blogPostService;
            _routableService = routableService;
            T = NullLocalizer.Instance;
        }

        private Localizer T { get; set; }

        protected override ContentType GetContentType() {
            return ContentType;
        }

        protected override string Prefix { get { return ""; } }

        protected override string GetDisplayText(Blog item) {
            return item.Name;
        }

        protected override RouteValueDictionary GetDisplayRouteValues(Blog blog) {
            return new RouteValueDictionary {
                                                {"Area", "Orchard.Blogs"},
                                                {"Controller", "Blog"},
                                                {"Action", "Item"},
                                                {"blogSlug", blog.Slug}
                                            };
        }

        protected override RouteValueDictionary GetEditorRouteValues(Blog blog) {
            return new RouteValueDictionary {
                                                {"Area", "Orchard.Blogs"},
                                                {"Controller", "Blog"},
                                                {"Action", "Edit"},
                                                {"blogSlug", blog.Slug}
                                            };
        }

        protected override DriverResult Display(Blog blog, string displayType) {

            IEnumerable<ContentItemViewModel<BlogPost>> blogPosts = null;
            if (displayType.StartsWith("DetailAdmin")) {
                blogPosts = _blogPostService.Get(blog, VersionOptions.Latest)
                    .Select(bp => _contentManager.BuildDisplayModel(bp, "SummaryAdmin"));
            }
            else if (displayType.StartsWith("Detail")) {
                blogPosts = _blogPostService.Get(blog)
                    .Select(bp => _contentManager.BuildDisplayModel(bp, "Summary"));
            }

            return Combined(
                ContentItemTemplate("Items/Blogs.Blog").LongestMatch(displayType, "Summary", "DetailAdmin", "SummaryAdmin"),
                Services.Authorizer.Authorize(Permissions.ManageBlogs) ? ContentPartTemplate(blog, "Parts/Blogs.Blog.Manage").Location("primary:manage") : null,
                ContentPartTemplate(blog, "Parts/Blogs.Blog.Metadata").Location("primary:metadata"),
                ContentPartTemplate(blog, "Parts/Blogs.Blog.Description").Location("primary"),
                blogPosts == null ? null : ContentPartTemplate(blogPosts, "Parts/Blogs.BlogPost.List", "").Location("primary"));
        }

        protected override DriverResult Editor(Blog blog) {
            return Combined(
                ContentItemTemplate("Items/Blogs.Blog"),
                ContentPartTemplate(blog, "Parts/Blogs.Blog.Fields").Location("primary", "1"));
        }

        protected override DriverResult Editor(Blog blog, IUpdateModel updater) {
            updater.TryUpdateModel(blog, Prefix, null, null);

            //todo: (heskew) something better needs to be done with this...still feels shoehorned in here
            ProcessSlug(blog, updater);

            return Combined(
                ContentItemTemplate("Items/Blogs.Blog"),
                ContentPartTemplate(blog, "Parts/Blogs.Blog.Fields").Location("primary", "1"));
        }

        private void ProcessSlug(Blog blog, IUpdateModel updater) {
            _routableService.FillSlug(blog.As<RoutableAspect>());
            

            if (string.IsNullOrEmpty(blog.Slug)) {
                return;

            // OR

            //    updater.AddModelError("Routable.Slug", T("The slug is required.").ToString());
            //    return;
            }


            if (!Regex.IsMatch(blog.Slug, @"^[^/:?#\[\]@!$&'()*+,;=\s]+$")) {
                //todo: (heskew) get rid of the hard-coded prefix
                updater.AddModelError("Routable.Slug", T("Please do not use any of the following characters in your slugs: \"/\", \":\", \"?\", \"#\", \"[\", \"]\", \"@\", \"!\", \"$\", \"&\", \"'\", \"(\", \")\", \"*\", \"+\", \",\", \";\", \"=\". No spaces are allowed (please use dashes or underscores instead).").ToString());
            }

            var slugsLikeThis = _blogService.Get().Where(
                b => b.Slug.StartsWith(blog.Slug, StringComparison.OrdinalIgnoreCase) &&
                b.Id != blog.Id).Select(b => b.Slug);

            //todo: (heskew) need better messages
            if (slugsLikeThis.Count() > 0) {
                var originalSlug = blog.Slug;
                //todo: (heskew) make auto-uniqueness optional
                blog.Slug = _routableService.GenerateUniqueSlug(blog.Slug, slugsLikeThis);

                if (originalSlug != blog.Slug)
                    Services.Notifier.Warning(T("Slugs in conflict. \"{0}\" is already set for a previously created blog so this blog now has the slug \"{1}\"",
                                                 originalSlug, blog.Slug));
            }
        }
    }
}