from django.utils.functional import SimpleLazyObject
from django.shortcuts import render
from django.conf import settings

# This is the whole site navigation structure. Stick in a smarter file?
sitenav = {
    'about': [
        {'title': 'About', 'link': '/about/'},
        {'title': 'Governance', 'link': '/about/governance/'},
        {'title': 'Policies', 'link': '/about/policies/'},
        {'title': 'Feature Matrix', 'link': '/about/featurematrix/'},
        {'title': 'Donate', 'link': '/about/donate/'},
        {'title': 'History', 'link': '/docs/current/history.html'},
        {'title': 'Sponsors', 'link': '/about/sponsors/', 'submenu': [
            {'title': 'Contributing', 'link': '/about/contributing/'},
            {'title': 'Financial', 'link': '/about/financial/'},
            {'title': 'Servers', 'link': '/about/servers/'},
        ]},
        {'title': 'Latest News', 'link': '/about/newsarchive/'},
        {'title': 'Upcoming Events', 'link': '/about/events/', 'submenu': [
            {'title': 'Past events', 'link': '/about/eventarchive/'},
        ]},
        {'title': 'Press', 'link': '/about/press/'},
        {'title': 'Licence', 'link': '/about/licence/'},
    ],
    'download': [
        {'title': 'Downloads', 'link': '/download/', 'submenu': [
            {'title': 'Packages', 'link': '/download/'},
            {'title': 'Source', 'link': '/ftp/source/'}
        ]},
        {'title': 'Software Catalogue', 'link': '/download/product-categories/'},
        {'title': 'File Browser', 'link': '/ftp/'},
    ],
    'docs': [
        {'title': 'Documentation', 'link': '/docs/'},
        {'title': 'Manuals', 'link': '/docs/', 'submenu': [
            {'title': 'Archive', 'link': '/docs/manuals/archive/'},
        ]},
        {'title': 'Release Notes', 'link': '/docs/release/'},
        {'title': 'Books', 'link': '/docs/books/'},
        {'title': 'Tutorials & Other Resources', 'link': '/docs/online-resources/'},
        {'title': 'FAQ', 'link': '/docs/faq/'},
        {'title': 'Wiki', 'link': 'https://wiki.postgresql.org'},
    ],
    'community': [
        {'title': 'Community', 'link': '/community/'},
        {'title': 'Contributors', 'link': '/community/contributors/'},
        {'title': 'Mailing Lists', 'link': '/list/'},
        {'title': 'IRC', 'link': '/community/irc/'},
        # {'title': 'Slack', 'link': 'https://join.slack.com/t/postgresteam/shared_invite/zt-1qj14i9sj-E9WqIFlvcOiHsEk2yFEMjA'},
        {'title': 'Local User Groups', 'link': '/community/user-groups/'},
        {'title': 'Recognised NPOs', 'link': '/community/recognised-npos/'},
        {'title': 'Events', 'link': '/about/events/'},
        {'title': 'International Sites', 'link': '/community/international/'},
    ],
    'developer': [
        {'title': 'Developers', 'link': '/developer/'},
        {'title': 'Core Team', 'link': '/developer/core/'},
        {'title': 'Committers', 'link': '/developer/committers/'},
        {'title': 'Roadmap', 'link': '/developer/roadmap/'},
        {'title': 'Coding', 'link': '/developer/coding/'},
        {'title': 'CommitFests', 'link': 'https://commitfest.postgresql.org'},
        {'title': 'Testing', 'link': '/developer/testing/', 'submenu': [
            {'title': 'Beta Information', 'link': '/developer/beta/'},
        ]},
        {'title': 'Mailing Lists', 'link': '/list/'},
        {'title': 'Developer FAQ', 'link': 'https://wiki.postgresql.org/wiki/Developer_FAQ'},
        {'title': 'Related Projects', 'link': '/developer/related-projects/'},
    ],
    'support': [
        {'title': 'Support', 'link': '/support/'},
        {'title': 'Versioning Policy', 'link': '/support/versioning/'},
        {'title': 'Security', 'link': '/support/security/'},
        {'title': 'Professional Services', 'link': '/support/professional_support/'},
        {'title': 'Hosting Solutions', 'link': '/support/professional_hosting/'},
        {'title': 'Report a Bug', 'link': '/account/submitbug/'},
    ],
    'account': [
        {'title': 'Your account', 'link': '/account'},
        {'title': 'Profile', 'link': '/account/profile'},
        {'title': 'Mailing List Subscriptions', 'link': 'https://lists.postgresql.org/manage/'},
        {'title': 'Submitted data', 'link': '/account', 'submenu': [
            {'title': 'News Articles', 'link': '/account/edit/news/'},
            {'title': 'Events', 'link': '/account/edit/events/'},
            {'title': 'Products', 'link': '/account/edit/products/'},
            {'title': 'Professional Services', 'link': '/account/edit/services/'},
            {'title': 'Organisations', 'link': '/account/edit/organisations/'},
        ]},
        {'title': 'Change password', 'link': '/account/changepwd/'},
        {'title': 'Logout', 'link': '/account/logout'},
    ],
}


def get_nav_menu(section):
    if section in sitenav:
        return sitenav[section]
    else:
        return {}


def render_pgweb(request, section, template, context):
    context['navmenu'] = get_nav_menu(section)
    return render(request, template, context)


def _get_gitrev():
    # Return the current git revision, that is used for
    # cache-busting URLs.
    try:
        with open('.git/refs/heads/master') as f:
            return f.readline()[:8]
    except IOError:
        # A "git gc" will remove the ref and replace it with a packed-refs.
        try:
            with open('.git/packed-refs') as f:
                for l in f.readlines():
                    if l.endswith("refs/heads/master\n"):
                        return l[:8]
                # Not found in packed-refs. Meh, just make one up.
                return 'ffffffff'
        except IOError:
            # If packed-refs also can't be read, just give up
            return 'eeeeeeee'


# Template context processor to add information about the root link and
# the current git revision. git revision is returned as a lazy object so
# we don't spend effort trying to load it if we don't need it (though
# all general pages will need it since it's used to render the css urls)
def PGWebContextProcessor(request):
    gitrev = SimpleLazyObject(_get_gitrev)
    if request.is_secure():
        return {
            'link_root': settings.SITE_ROOT,
            'do_esi': settings.DO_ESI,
            'gitrev': gitrev,
        }
    else:
        return {
            'gitrev': gitrev,
            'do_esi': settings.DO_ESI,
        }