from django.urls import reverse, NoReverseMatch
from django.shortcuts import render as dj_render

from ...conf import settings
from .. import site
from ..auth import is_admin_authorized, update_admin_authorization
from .auth import login


def get_protected_namespace(request):
    for namespace in settings.MISAGO_ADMIN_NAMESPACES:
        try:
            admin_path = reverse("%s:index" % namespace)
            if request.path.startswith(admin_path):
                return namespace
        except NoReverseMatch:
            pass


def render(request, template, context=None, error_page=False):
    context = context or {}

    navigation = site.visible_branches(request)
    sections = navigation[0]

    try:
        actions = navigation[1]
    except IndexError:
        actions = []

    try:
        pages = navigation[2]
    except IndexError:
        pages = []

    context.update({"sections": sections, "actions": actions, "pages": pages})

    if error_page:
        # admittedly haxy solution for displaying navs on error pages
        context["actions"] = []
        context["pages"] = []
        for item in navigation[0]:
            item["is_active"] = False
    else:
        context["active_link"] = None
        for item in navigation[-1]:
            if item["is_active"]:
                context["active_link"] = item
                break

    return dj_render(request, template, context)


# Decorator for views
def protected_admin_view(f):
    def decorator(request, *args, **kwargs):
        protected_view = get_protected_namespace(request)
        if protected_view:
            if is_admin_authorized(request):
                update_admin_authorization(request)
                return f(request, *args, **kwargs)
            request.admin_namespace = protected_view
            return login(request)
        return f(request, *args, **kwargs)

    return decorator