# Copyright 2013 New Dream Network, LLC (DreamHost)
#
#    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.

import os
import subprocess
import urlparse


CGIT_BASE = 'http://git.openstack.org/cgit/'
_cgit_link = None


def _html_page_context(app, pagename, templatename, context, doctree):
    global _cgit_link
    if _cgit_link is None:
        try:
            git_remote = subprocess.check_output(
                ['git', 'config', '--local', '--get', 'remote.origin.url']
            )
        except subprocess.CheckedProcessException:
            _cgit_link = 'unknown'
        else:
            parsed = urlparse.urlparse(git_remote)
            _cgit_link = CGIT_BASE + parsed.path.lstrip('/')
    context['cgit_link'] = _cgit_link
    return context


def builder_inited(app):
    theme_dir = os.path.join(os.path.dirname(__file__), 'theme')
    app.info('Using openstack theme from %s' % theme_dir)
    # Insert our theme directory at the front of the search path and
    # force the theme setting to use the one in the package unless
    # another openstack theme is already selected. This is done here,
    # instead of in setup(), because conf.py is read after setup()
    # runs, so if the conf contains these values the user values
    # overwrite these. That's not bad for the theme, but it breaks the
    # search path.
    app.config.html_theme_path.insert(0, theme_dir)
    # Set the theme name
    if not app.config.html_theme.startswith('openstack'):
        app.config.html_theme = 'openstack'
    # Re-initialize the builder, if it has the method for setting up
    # the templates and theme.
    if hasattr(app.builder, 'init_templates'):
        app.builder.init_templates()
    # Register our page context additions
    app.connect('html-page-context', _html_page_context)


def setup(app):
    app.connect('builder-inited', builder_inited)