from django.utils.translation import gettext_lazy as _

from . import menu, preferences

THEME_OPTIONS = (
    ("light", _("Light")),
    ("dark", _("Dark")),
    ("system", _("System")),
)
LANGUAGE_OPTIONS = (("de", "Deutsch"), ("en", "English"))
FORM_OPTIONS = (("sie", "Sie"), ("du", "du"))


def initials(name: str) -> str:
    words = [w for w in name.split() if w]
    if not words:
        return "?"
    letters = words[0][0] + (words[-1][0] if len(words) > 1 else "")
    return letters.upper()


def shell(request):
    """Menu, preferences and the values the base layout needs."""
    prefs = getattr(request, "preferences", preferences.Preferences())
    portal_user = getattr(request, "portal_user", None)
    context = {
        "preferences": prefs,
        "html_lang": prefs.language,
        "theme_options": THEME_OPTIONS,
        "language_options": LANGUAGE_OPTIONS,
        "form_options": FORM_OPTIONS,
        "portal_user": portal_user,
    }
    if portal_user is not None:
        context["menu_groups"] = menu.for_user(portal_user, request.path)
        context["initials"] = initials(portal_user.display_name)
    return context