package frontend

import (
	"fmt"
	"html/template"
	"io"
	"log"
	"mime"
	"net/http"
	"os"
	"path/filepath"
	"strings"
	"time"

	"github.com/google/uuid"
	b "streifling.com/jason/cpolis/cmd/backend"
)

func PublishLatestIssue(c *b.Config, db *b.DB, s *b.CookieStore) http.HandlerFunc {
	return func(w http.ResponseWriter, r *http.Request) {
		session, err := getSession(w, r, c, s)
		if err != nil {
			return
		}

		session.Values["article"] = nil
		if err = session.Save(r, w); err != nil {
			log.Println(err)
			http.Error(w, err.Error(), http.StatusInternalServerError)
			return
		}

		if session.Values["issue-image"] == nil {
			err := "error: Image required"
			log.Println(err)
			http.Error(w, err, http.StatusBadRequest)
			return
		}

		imgFileName := session.Values["issue-image"].(string)
		imgAbsName := fmt.Sprint(c.PicsDir, "/", imgFileName)

		imgFile, err := os.Open(imgAbsName)
		if err != nil {
			log.Println(err)
			http.Error(w, err.Error(), http.StatusInternalServerError)
			return
		}
		defer imgFile.Close()

		imgInfo, err := imgFile.Stat()
		if err != nil {
			log.Println(err)
			http.Error(w, err.Error(), http.StatusInternalServerError)
			return
		}

		imgSize := imgInfo.Size()
		mimeType := mime.TypeByExtension(filepath.Ext(imgAbsName))

		article := &b.Article{
			Title:     "Autogenerated cpolis Issue Article",
			EncURL:    fmt.Sprint("http://", c.Domain, c.Port, "/image/serve/", imgFileName),
			EncLength: int(imgSize),
			EncType:   mimeType,
			Published: true,
			Rejected:  false,
			Created:   time.Now(),
			AuthorID:  session.Values["id"].(int64),
		}
		fmt.Println(article.Link)

		article.ID, err = db.AddArticle(article)
		if err != nil {
			log.Println(err)
			http.Error(w, err.Error(), http.StatusInternalServerError)
			return
		}

		articleAbsName := fmt.Sprint(c.ArticleDir, "/", article.ID, ".md")
		if err = os.WriteFile(articleAbsName, []byte(r.PostFormValue("article-content")), 0644); err != nil {
			log.Println(err)
			http.Error(w, err.Error(), http.StatusInternalServerError)
			return
		}

		article.Link = fmt.Sprint("http://", c.Domain, c.Port, "/article/serve/", article.ID)
		if err = db.UpdateAttributes(&b.Attribute{Table: "articles", ID: article.ID, AttName: "link", Value: article.Link}); err != nil {
			log.Println(err)
			http.Error(w, err.Error(), http.StatusInternalServerError)
			return
		}

		if err = db.UpdateAttributes(&b.Attribute{Table: "articles", ID: article.ID, AttName: "link", Value: article.Link}); err != nil {
			log.Println(err)
			http.Error(w, err.Error(), http.StatusInternalServerError)
			return
		}

		if err = db.AddArticleToCurrentIssue(article.ID); err != nil {
			log.Println(err)
			http.Error(w, err.Error(), http.StatusInternalServerError)
			return
		}

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

		feed, err := b.GenerateRSS(c, db)
		if err != nil {
			log.Println(err)
			http.Error(w, err.Error(), http.StatusInternalServerError)
			return
		}
		if err = b.SaveRSS(c.RSSFile, feed); err != nil {
			log.Println(err)
			http.Error(w, err.Error(), http.StatusInternalServerError)
			return
		}

		session.Values["issue-image"] = nil
		if err = session.Save(r, w); err != nil {
			log.Println(err)
			http.Error(w, err.Error(), http.StatusInternalServerError)
			return
		}

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

func UploadIssueImage(c *b.Config, s *b.CookieStore) http.HandlerFunc {
	return func(w http.ResponseWriter, r *http.Request) {
		session, err := getSession(w, r, c, s)
		if err != nil {
			return
		}

		if err := r.ParseMultipartForm(10 << 20); err != nil {
			log.Println(err)
			http.Error(w, err.Error(), http.StatusBadRequest)
			return
		}

		file, header, err := r.FormFile("issue-image")
		if err != nil {
			log.Println(err)
			http.Error(w, err.Error(), http.StatusInternalServerError)
			return
		}
		defer file.Close()

		nameStrings := strings.Split(header.Filename, ".")
		extension := "." + nameStrings[len(nameStrings)-1]
		filename := fmt.Sprint(uuid.New(), extension)
		absFilepath, err := filepath.Abs(fmt.Sprint(c.PicsDir, "/", filename))
		if err != nil {
			log.Println(err)
			http.Error(w, err.Error(), http.StatusInternalServerError)
			return
		}

		img, err := os.Create(absFilepath)
		if err != nil {
			log.Println(err)
			http.Error(w, err.Error(), http.StatusInternalServerError)
			return
		}
		defer img.Close()

		if _, err = io.Copy(img, file); err != nil {
			log.Println(err)
			http.Error(w, err.Error(), http.StatusInternalServerError)
			return
		}

		session.Values["issue-image"] = filename
		if err = session.Save(r, w); err != nil {
			log.Println(err)
			http.Error(w, err.Error(), http.StatusInternalServerError)
			return
		}

		w.WriteHeader(http.StatusOK)
	}
}