# Copyright 2012 Nebula, Inc.
#
#    Licensed under the Apache License, Version 2.0 (the "License"); you may
#    not use this file except in compliance with the License. You may obtain
#    a copy of the License at
#
#         http://www.apache.org/licenses/LICENSE-2.0
#
#    Unless required by applicable law or agreed to in writing, software
#    distributed under the License is distributed on an "AS IS" BASIS, WITHOUT
#    WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied. See the
#    License for the specific language governing permissions and limitations
#    under the License.

from datetime import datetime  # noqa

from django import shortcuts
import django.views.decorators.vary

import horizon
from horizon import base
from horizon import exceptions


def get_user_home(user):
    dashboard = None
    if user.is_superuser:
        try:
            dashboard = horizon.get_dashboard('admin')
        except base.NotRegistered:
            pass

    if dashboard is None:
        dashboard = horizon.get_default_dashboard()

    return dashboard.get_absolute_url()


@django.views.decorators.vary.vary_on_cookie
def splash(request):
    if not request.user.is_authenticated():
        raise exceptions.NotAuthenticated()

    response = shortcuts.redirect(horizon.get_user_home(request.user))
    if 'logout_reason' in request.COOKIES:
        response.delete_cookie('logout_reason')
    return response


def _one_year():
    now = datetime.utcnow()
    return datetime(now.year + 1, now.month, now.day, now.hour,
                    now.minute, now.second, now.microsecond, now.tzinfo)


def language(request, language):
    last_url = request.META.get('HTTP_REFERER', "/")
    response = shortcuts.redirect(last_url)
    response.set_cookie("horizon_language", language, expires=_one_year())
    return response