package ui

import (
	"html/template"
	"log"
	"net/http"
	"time"

	"git.streifling.com/jason/rss"
	"streifling.com/jason/cpolis/cmd/data"
)

func ShowRSS(db *data.DB, title, link, desc string) http.HandlerFunc {
	return func(w http.ResponseWriter, r *http.Request) {
		channel := &rss.Channel{
			Title:       title,
			Link:        link,
			Description: desc,
			Items:       make([]*rss.Item, 0),
		}

		articles, err := db.GetCertainArticles(true)
		if err != nil {
			log.Println(err)
			http.Error(w, err.Error(), http.StatusInternalServerError)
			return
		}

		for _, article := range articles {
			tags, err := db.GetArticleTags(article.ID)
			if err != nil {
				log.Println(err)
				http.Error(w, err.Error(), http.StatusInternalServerError)
				return
			}
			tagNames := make([]string, 0)
			for _, tag := range tags {
				tagNames = append(tagNames, tag.Name)
			}

			user, err := db.GetUser(article.AuthorID)
			if err != nil {
				log.Println(err)
				http.Error(w, err.Error(), http.StatusInternalServerError)
				return
			}

			channel.Items = append(channel.Items, &rss.Item{
				Title:       article.Title,
				Author:      user.FirstName + user.LastName,
				PubDate:     article.Created.Format(time.RFC1123Z),
				Description: article.Desc,
				Content:     &rss.Content{Value: article.Content},
				Categories:  tagNames,
			})
		}

		feed := rss.NewFeed()
		feed.Channels = append(feed.Channels, channel)
		rss, err := feed.ToXML()
		if err != nil {
			log.Println(err)
			http.Error(w, err.Error(), http.StatusInternalServerError)
			return
		}

		files := []string{"web/templates/index.html", "web/templates/feed.rss"}
		tmpl, err := template.ParseFiles(files...)
		template.Must(tmpl, err).Execute(w, rss)
	}
}