package handler

import (
	"fmt"
	"github.com/gorilla/mux"
	"log"
	"net/http"
	"status/config"
	"status/storage"
	"status/web/session"
)

func serverError(w http.ResponseWriter, err error) {
	log.Println("[server error]", err)
	http.Error(w, fmt.Sprintf("server error: %s", err), http.StatusInternalServerError)
}

func notFound(w http.ResponseWriter) {
	http.Error(w, "Page Not Found", http.StatusNotFound)
}

func unauthorized(w http.ResponseWriter) {
	http.Error(w, "Unauthorized", http.StatusUnauthorized)
}

type Handler struct {
	cfg     *config.Config
	mux     *mux.Router
	storage *storage.Storage
	sess    *session.Session
}

//func (h *Handler) getUser(r *http.Request) (string, error) {
//	user, err := h.sess.Get(r)
//	if err != nil {
//		return "", err
//	}
//	if h.cfg.Env != "PROD" {
//		return user, err
//	}
//	// Removes "https://" from referer before checking.
//	// Thank you crussel for this fix!
//	if !strings.HasPrefix(r.Referer()[8:], h.cfg.Host) && !strings.HasPrefix(r.Referer()[8:], user+h.cfg.Host) {
//		err = errors.New("wrong referer")
//	}
//	return user, err
//}

func (h *Handler) getUser(r *http.Request) (string, error) {
	user, err := h.sess.Get(r)
	if err != nil {
		return "", err
	}
	return user, nil
}

func New(cfg *config.Config, sess *session.Session, data *storage.Storage) (http.Handler, error) {
	router := mux.NewRouter()
	h := &Handler{
		cfg:     cfg,
		mux:     router,
		storage: data,
		sess:    sess,
	}
	h.initTpl()

	router.HandleFunc("/", h.showIndexView).Methods(http.MethodGet)
	router.HandleFunc("/login", h.showLoginView).Methods(http.MethodGet)
	router.HandleFunc("/check-login", h.checkLogin).Methods(http.MethodPost)
	router.HandleFunc("/register", h.handleRegister)
	router.HandleFunc("/logout", h.logout).Methods(http.MethodGet)

	router.HandleFunc("/status-new", h.showNewStatusView).Methods(http.MethodGet)
	router.HandleFunc("/status-save", h.saveStatus).Methods(http.MethodPost)
	router.HandleFunc("/statuses/{id}/edit", h.showEditStatusView).Methods(http.MethodGet)
	router.HandleFunc("/statuses/{id}/update", h.updateStatus).Methods(http.MethodPost)

	router.HandleFunc("/users/{user}", h.showUserView).Methods(http.MethodGet)
	router.HandleFunc("/users/{user}/status.json", h.showUserStatusView).Methods(http.MethodGet)
	router.PathPrefix("/assets/").Handler(
		http.StripPrefix("/assets/",
			http.FileServer(
				http.Dir(cfg.AssetsDir),
			),
		),
	)

	return router, nil
}