# vim: tabstop=4 shiftwidth=4 softtabstop=4

# 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 collections import defaultdict

from django.utils.translation import ugettext_lazy as _

from horizon.tables import MultiTableView


class ResourceBrowserView(MultiTableView):
    browser_class = None

    def __init__(self, *args, **kwargs):
        if not self.browser_class:
            raise ValueError("You must specify a ResourceBrowser subclass "
                             "for the browser_class attribute on %s."
                             % self.__class__.__name__)
        self.table_classes = (self.browser_class.navigation_table_class,
                              self.browser_class.content_table_class)
        super(ResourceBrowserView, self).__init__(*args, **kwargs)
        self.navigation_selection = False

    def get_browser(self):
        if not hasattr(self, "browser"):
            self.browser = self.browser_class(self.request, **self.kwargs)
            self.browser.set_tables(self.get_tables())
            if not self.navigation_selection:
                ct = self.browser.content_table
                item = self.browser.navigable_item_name.lower()
                ct._no_data_message = _("Select a %s to browse.") % item
        return self.browser

    def get_context_data(self, **kwargs):
        context = super(ResourceBrowserView, self).get_context_data(**kwargs)
        browser = self.get_browser()
        context["%s_browser" % browser.name] = browser
        return context
