# Copyright (C) 2016-2020 RhodeCode GmbH
#
# This program is free software: you can redistribute it and/or modify
# it under the terms of the GNU Affero General Public License, version 3
# (only), as published by the Free Software Foundation.
#
# This program is distributed in the hope that it will be useful,
# but WITHOUT ANY WARRANTY; without even the implied warranty of
# MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
# GNU General Public License for more details.
#
# You should have received a copy of the GNU Affero General Public License
# along with this program.  If not, see <http://www.gnu.org/licenses/>.
#
# This program is dual-licensed. If you wish to learn more about the
# RhodeCode Enterprise Edition, including its added features, Support services,
# and proprietary license terms, please see https://rhodecode.com/licenses/


import logging
import collections

from zope.interface import implementer

from rhodecode.apps._base.interfaces import IAdminNavigationRegistry
from rhodecode.lib.utils2 import str2bool
from rhodecode.translation import _


log = logging.getLogger(__name__)

NavListEntry = collections.namedtuple(
    'NavListEntry', ['key', 'name', 'url', 'active_list'])


class NavEntry(object):
    """
    Represents an entry in the admin navigation.

    :param key: Unique identifier used to store reference in an OrderedDict.
    :param name: Display name, usually a translation string.
    :param view_name: Name of the view, used generate the URL.
    :param active_list: list of urls that we select active for this element
    """

    def __init__(self, key, name, view_name, active_list=None):
        self.key = key
        self.name = name
        self.view_name = view_name
        self._active_list = active_list or []

    def generate_url(self, request):
        return request.route_path(self.view_name)

    def get_localized_name(self, request):
        return request.translate(self.name)

    @property
    def active_list(self):
        active_list = [self.key]
        if self._active_list:
            active_list = self._active_list
        return active_list


@implementer(IAdminNavigationRegistry)
class NavigationRegistry(object):

    _base_entries = [
        NavEntry('global', _('Global'),
                 'admin_settings_global'),
        NavEntry('vcs', _('VCS'),
                 'admin_settings_vcs'),
        NavEntry('visual', _('Visual'),
                 'admin_settings_visual'),
        NavEntry('mapping', _('Remap and Rescan'),
                 'admin_settings_mapping'),
        NavEntry('issuetracker', _('Issue Tracker'),
                 'admin_settings_issuetracker'),
        NavEntry('email', _('Email'),
                 'admin_settings_email'),
        NavEntry('hooks', _('Hooks'),
                 'admin_settings_hooks'),
        NavEntry('search', _('Full Text Search'),
                 'admin_settings_search'),
        NavEntry('system', _('System Info'),
                 'admin_settings_system'),
        NavEntry('exceptions', _('Exceptions Tracker'),
                 'admin_settings_exception_tracker',
                 active_list=['exceptions', 'exceptions_browse']),
        NavEntry('process_management', _('Processes'),
                 'admin_settings_process_management'),
        NavEntry('sessions', _('User Sessions'),
                 'admin_settings_sessions'),
        NavEntry('open_source', _('Open Source Licenses'),
                 'admin_settings_open_source'),
        NavEntry('automation', _('Automation'),
                 'admin_settings_automation')
    ]

    _labs_entry = NavEntry('labs', _('Labs'),
                           'admin_settings_labs')

    def __init__(self, labs_active=False):
        self._registered_entries = collections.OrderedDict()
        for item in self.__class__._base_entries:
            self._registered_entries[item.key] = item

        if labs_active:
            self.add_entry(self._labs_entry)

    def add_entry(self, entry):
        self._registered_entries[entry.key] = entry

    def get_navlist(self, request):
        nav_list = [
            NavListEntry(i.key, i.get_localized_name(request),
                         i.generate_url(request), i.active_list)
            for i in self._registered_entries.values()]
        return nav_list


def navigation_registry(request, registry=None):
    """
    Helper that returns the admin navigation registry.
    """
    pyramid_registry = registry or request.registry
    nav_registry = pyramid_registry.queryUtility(IAdminNavigationRegistry)
    return nav_registry


def navigation_list(request):
    """
    Helper that returns the admin navigation as list of NavListEntry objects.
    """
    return navigation_registry(request).get_navlist(request)


def includeme(config):
    # Create admin navigation registry and add it to the pyramid registry.
    settings = config.get_settings()
    labs_active = str2bool(settings.get('labs_settings_active', False))
    navigation_registry_instance = NavigationRegistry(labs_active=labs_active)
    config.registry.registerUtility(navigation_registry_instance)
    log.debug('Created new navigation instance, %s', navigation_registry_instance)