package views

import (
	"html/template"
	"log"
	"net/http"
	"path/filepath"

	"gitea.gwairfelin.com/max/gonotes/internal/conf"
	"gitea.gwairfelin.com/max/gonotes/internal/notes"
	"gitea.gwairfelin.com/max/gonotes/internal/urls"
)

var myurls urls.URLs

func GetRoutes(prefix string) *http.ServeMux {
	myurls = urls.URLs{
		Prefix: prefix,
		URLs: map[string]urls.URL{
			"view": {Path: "/{note}/", Protocol: "GET", Handler: viewHandler},
			"edit": {Path: "/{note}/edit/", Protocol: "GET", Handler: editHandler},
			"save": {Path: "/{note}/edit/save/", Protocol: "POST", Handler: saveHandler},
		},
	}
	return myurls.GetRouter()
}

func viewHandler(w http.ResponseWriter, r *http.Request) {
	title := r.PathValue("note")
	note, err := notes.LoadNote(title)
	if err != nil {
		http.Redirect(w, r, myurls.Reverse("edit", map[string]string{"note": title}), http.StatusFound)
		return
	}

	note.Render()
	err = renderTemplate(w, "view.html", note)
	if err != nil {
		log.Println(err)
		http.Error(w, "Couldn't load template", http.StatusInternalServerError)
		return
	}
}

func editHandler(w http.ResponseWriter, r *http.Request) {
	title := r.PathValue("note")
	note, err := notes.LoadNote(title)
	if err != nil {
		note = &notes.Note{Title: title}
	}

	err = renderTemplate(w, "edit.html", note)
	if err != nil {
		log.Println(err)
		http.Error(w, "Couldn't load template", http.StatusInternalServerError)
		return
	}
}

func saveHandler(w http.ResponseWriter, r *http.Request) {
	title := r.PathValue("note")
	body := r.FormValue("body")
	note := &notes.Note{Title: title, Body: []byte(body)}
	note.Save()
	http.Redirect(w, r, myurls.Reverse("view", map[string]string{"note": title}), http.StatusFound)
}

func renderTemplate(w http.ResponseWriter, tmpl string, note *notes.Note) error {
	t, err := template.ParseFiles(filepath.Join(conf.Conf.TemplatesDir, tmpl))
	t.Execute(w, note)
	return err
}