package helpers

import (
	"net/http"
	"time"

	session "synlotto-website/handlers/session"

	"synlotto-website/constants"

	"github.com/gorilla/sessions"
)

func GetSession(w http.ResponseWriter, r *http.Request) (*sessions.Session, error) {
	return session.GetSession(w, r)
}

func IsSessionExpired(session *sessions.Session) bool {
	last, ok := session.Values["last_activity"].(time.Time)
	if !ok {
		return false
	}
	return time.Since(last) > constants.SessionDuration
}

func UpdateSessionActivity(session *sessions.Session, r *http.Request, w http.ResponseWriter) {
	session.Values["last_activity"] = time.Now().UTC()
	session.Save(r, w)
}

func AuthMiddleware(next http.HandlerFunc) http.HandlerFunc {
	return func(w http.ResponseWriter, r *http.Request) {
		session, _ := GetSession(w, r)

		if IsSessionExpired(session) {
			session.Options.MaxAge = -1
			session.Save(r, w)

			newSession, _ := GetSession(w, r)
			newSession.Values["flash"] = "Your session has timed out."
			newSession.Save(r, w)

			http.Redirect(w, r, "/account/login", http.StatusSeeOther)
			return
		}

		UpdateSessionActivity(session, r, w)

		next(w, r)
	}
}