package ui

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

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

func ShowHub(s *data.CookieStore) http.HandlerFunc {
	return func(w http.ResponseWriter, r *http.Request) {
		session, err := s.Get(r, "cookie")
		if err != nil {
			tmpl, err := template.ParseFiles("web/templates/login.html")
			msg := "Session nicht mehr gültig. Bitte erneut anmelden."
			template.Must(tmpl, err).ExecuteTemplate(w, "page-content", msg)
		}

		tmpl, err := template.ParseFiles("web/templates/hub.html")
		template.Must(tmpl, err).ExecuteTemplate(w, "page-content", session.Values["role"])
	}
}

func WriteArticle(db *data.DB) http.HandlerFunc {
	return func(w http.ResponseWriter, r *http.Request) {
		tags, err := db.GetTagList()
		if err != nil {
			log.Println(err)
			http.Error(w, err.Error(), http.StatusInternalServerError)
			return
		}

		tmpl, err := template.ParseFiles("web/templates/editor.html")
		template.Must(tmpl, err).ExecuteTemplate(w, "page-content", tags)
	}
}

func FinishArticle(db *data.DB, s *data.CookieStore) http.HandlerFunc {
	return func(w http.ResponseWriter, r *http.Request) {
		article := new(data.Article)
		var err error

		article.Title, err = data.ConvertToPlain(r.PostFormValue("editor-title"))
		if err != nil {
			log.Println(err)
			http.Error(w, err.Error(), http.StatusInternalServerError)
			return
		}

		article.Desc, err = data.ConvertToPlain(r.PostFormValue("editor-desc"))
		if err != nil {
			log.Println(err)
			http.Error(w, err.Error(), http.StatusInternalServerError)
			return
		}

		article.Content, err = data.ConvertToHTML(r.PostFormValue("editor-text"))
		if err != nil {
			log.Println(err)
			http.Error(w, err.Error(), http.StatusInternalServerError)
			return
		}

		r.ParseForm()
		article.Tags = append(article.Tags, r.Form["tags"]...)

		session, err := s.Get(r, "cookie")
		if err != nil {
			tmpl, err := template.ParseFiles("web/templates/login.html")
			msg := "Session nicht mehr gültig. Bitte erneut anmelden."
			template.Must(tmpl, err).ExecuteTemplate(w, "page-content", msg)
		}

		article.AuthorID = session.Values["id"].(int64)
		db.AddArticle(article)

		tmpl, err := template.ParseFiles("web/templates/hub.html")
		tmpl = template.Must(tmpl, err)
		tmpl.ExecuteTemplate(w, "page-content", session.Values["role"])
	}
}

func ShowUnpublishedArticles(db *data.DB) http.HandlerFunc {
	return func(w http.ResponseWriter, r *http.Request) {
		articles, err := db.GetUnpublishedArticles()
		if err != nil {
			log.Println(err)
			http.Error(w, err.Error(), http.StatusInternalServerError)
			return
		}
		tmpl, err := template.ParseFiles("web/templates/unpublished-articles.html")
		template.Must(tmpl, err).ExecuteTemplate(w, "page-content", articles)
	}
}

func ReviewArticle(db *data.DB, s *data.CookieStore) http.HandlerFunc {
	return func(w http.ResponseWriter, r *http.Request) {
		id, err := strconv.ParseInt(r.PostFormValue("id"), 10, 64)
		if err != nil {
			log.Println(err)
			http.Error(w, err.Error(), http.StatusInternalServerError)
			return
		}

		article, err := db.GetArticle(id)
		if err != nil {
			tmpl, err := template.ParseFiles("web/templates/to-be-published.html")
			template.Must(tmpl, err).ExecuteTemplate(w, "page-content", article)
			return
		}

		session, err := s.Get(r, "cookie")
		if err != nil {
			tmpl, err := template.ParseFiles("web/templates/login.html")
			msg := "Session nicht mehr gültig. Bitte erneut anmelden."
			template.Must(tmpl, err).ExecuteTemplate(w, "page-content", msg)
		}

		tmpl, err := template.ParseFiles("web/templates/hub.html")
		tmpl = template.Must(tmpl, err)
		tmpl.ExecuteTemplate(w, "page-content", session.Values["role"])
	}
}

func PublishArticle(db *data.DB, c *data.Channel, s *data.CookieStore) http.HandlerFunc {
	return func(w http.ResponseWriter, r *http.Request) {
		id, err := strconv.ParseInt(r.PostFormValue("id"), 10, 64)
		if err != nil {
			log.Println(err)
			http.Error(w, err.Error(), http.StatusInternalServerError)
			return
		}

		if err = db.UpdateArticle(id, "published", true); err != nil {
			log.Println(err)
			http.Error(w, err.Error(), http.StatusInternalServerError)
			return
		}
		article, err := db.GetArticle(id)
		if err != nil {
			log.Println(err)
			http.Error(w, err.Error(), http.StatusInternalServerError)
			return
		}

		session, err := s.Get(r, "cookie")
		if err != nil {
			tmpl, err := template.ParseFiles("web/templates/login.html")
			msg := "Session nicht mehr gültig. Bitte erneut anmelden."
			template.Must(tmpl, err).ExecuteTemplate(w, "page-content", msg)
		}

		c.Add(&rss.Item{
			Title:       article.Title,
			Author:      session.Values["name"].(string),
			PubDate:     article.Created.Format(time.RFC1123Z),
			Description: article.Desc,
			Content:     &rss.Content{Value: article.Content},
			Categories:  article.Tags,
		})
		c.Save("tmp/rss.gob")

		tmpl, err := template.ParseFiles("web/templates/hub.html")
		tmpl = template.Must(tmpl, err)
		tmpl.ExecuteTemplate(w, "page-content", session.Values["role"])
	}
}