from __future__ import absolute_import, unicode_literals

import logging

from django import apps
from django.conf import settings
from django.conf.urls import include, url
from django.contrib.auth.signals import user_logged_in
from django.db.models.signals import post_migrate, post_save
from django.utils.translation import ugettext_lazy as _

from .handlers import (
    user_locale_profile_session_config, user_locale_profile_create
)
from .links import (
    link_about, link_current_user_details, link_current_user_edit,
    link_current_user_locale_profile_details,
    link_current_user_locale_profile_edit, link_license,
    link_maintenance_menu, link_setup, link_tools
)
from .menus import (
    menu_facet, menu_main, menu_secondary, menu_setup, menu_tools
)
from .models import AnonymousUserSingleton

logger = logging.getLogger(__name__)


def create_anonymous_user(sender, **kwargs):
    AnonymousUserSingleton.objects.get_or_create()


class MayanAppConfig(apps.AppConfig):
    app_url = None
    app_namespace = None

    def ready(self):
        from mayan.urls import urlpatterns

        if self.app_url:
            top_url = '{}/'.format(self.app_url)
        elif self.app_url is not None:
            top_url = ''
        else:
            top_url = '{}/'.format(self.name)

        urlpatterns += url(r'^{}'.format(top_url), include('{}.urls'.format(self.name), namespace=self.app_namespace or self.name)),


class CommonApp(MayanAppConfig):
    app_url = ''
    name = 'common'
    verbose_name = _('Common')

    def ready(self):
        super(CommonApp, self).ready()

        menu_facet.bind_links(links=[link_current_user_details, link_current_user_locale_profile_details, link_tools, link_setup], sources=['common:current_user_details', 'common:current_user_edit', 'common:current_user_locale_profile_details', 'common:current_user_locale_profile_edit', 'authentication:password_change_view', 'common:setup_list', 'common:tools_list'])
        menu_main.bind_links(links=[link_about], position=-1)
        menu_secondary.bind_links(
            links=[link_about, link_license],
            sources=['common:about_view', 'common:license_view']
        )
        menu_secondary.bind_links(
            links=[
                link_current_user_edit, link_current_user_locale_profile_edit
            ],
            sources=['common:current_user_details', 'common:current_user_edit', 'common:current_user_locale_profile_details', 'common:current_user_locale_profile_edit', 'authentication:password_change_view', 'common:setup_list', 'common:tools_list']
        )
        menu_tools.bind_links(links=[link_maintenance_menu])

        post_migrate.connect(create_anonymous_user, dispatch_uid='create_anonymous_user', sender=self)
        user_logged_in.connect(user_locale_profile_session_config, dispatch_uid='user_locale_profile_session_config', sender=settings.AUTH_USER_MODEL)
        post_save.connect(user_locale_profile_create, dispatch_uid='user_locale_profile_create', sender=settings.AUTH_USER_MODEL)