""" Django settings for the Bcfg2 server """

import os
import sys
import logging
import Bcfg2.Logger
import Bcfg2.Options

try:
    import django
    import django.conf
    HAS_DJANGO = True
except ImportError:
    HAS_DJANGO = False

# required for reporting
try:
    import south  # pylint: disable=W0611
    HAS_SOUTH = True
except ImportError:
    HAS_SOUTH = False

settings = dict(  # pylint: disable=C0103
    TIME_ZONE=None,
    TEMPLATE_DEBUG=False,
    DEBUG=False,
    ALLOWED_HOSTS=['*'],
    MEDIA_URL='/site_media/',
    MANAGERS=(('Root', 'root')),
    ADMINS=(('Root', 'root')),
    # Language code for this installation. All choices can be found
    # here:
    # http://www.w3.org/TR/REC-html40/struct/dirlang.html#langcodes
    # http://blogs.law.harvard.edu/tech/stories/storyReader$15
    LANGUAGE_CODE='en-us',
    SITE_ID=1,
    INSTALLED_APPS=('django.contrib.auth',
                    'django.contrib.contenttypes',
                    'django.contrib.sessions',
                    'django.contrib.sites',
                    'django.contrib.admin',
                    'Bcfg2.Server'),
    MEDIA_ROOT='',
    STATIC_URL='/media/',
    # TODO - make this unique
    SECRET_KEY='eb5+y%oy-qx*2+62vv=gtnnxg1yig_odu0se5$h0hh#pc*lmo7',
    TEMPLATE_LOADERS=('django.template.loaders.filesystem.Loader',
                      'django.template.loaders.app_directories.Loader'),
    MIDDLEWARE_CLASSES=(
        'django.middleware.common.CommonMiddleware',
        'django.contrib.sessions.middleware.SessionMiddleware',
        'django.contrib.auth.middleware.AuthenticationMiddleware',
        'django.middleware.doc.XViewMiddleware'),
    ROOT_URLCONF='Bcfg2.Reporting.urls',
    AUTHENTICATION_BACKENDS=('django.contrib.auth.backends.ModelBackend'),
    LOGIN_URL='/login',
    SESSION_EXPIRE_AT_BROWSER_CLOSE=True,
    TEMPLATE_DIRS=(
        '/usr/share/python-support/python-django/django/contrib/admin/'
        'templates/'),
    TEMPLATE_CONTEXT_PROCESSORS=(
        'django.contrib.auth.context_processors.auth',
        'django.core.context_processors.debug',
        'django.core.context_processors.i18n',
        'django.core.context_processors.media',
        'django.core.context_processors.request'))

if HAS_SOUTH:
    settings['INSTALLED_APPS'] += ('south', 'Bcfg2.Reporting')
if 'BCFG2_LEGACY_MODELS' in os.environ:
    settings['INSTALLED_APPS'] += ('Bcfg2.Server.Reports.reports',)

if HAS_DJANGO and django.VERSION[0] == 1 and django.VERSION[1] < 3:
    settings['CACHE_BACKEND'] = 'locmem:///'
else:
    settings['CACHES'] = {
        'default': {
            'BACKEND': 'django.core.cache.backends.locmem.LocMemCache',
        }
    }


def finalize_django_config(opts=None, silent=False):
    """ Perform final Django configuration """
    if opts is None:
        opts = Bcfg2.Options.setup
    settings['DATABASES'] = dict(
        default=dict(
            ENGINE="django.db.backends.%s" % opts.db_engine,
            NAME=opts.db_name,
            USER=opts.db_user,
            PASSWORD=opts.db_password,
            HOST=opts.db_host,
            PORT=opts.db_port,
            OPTIONS=opts.db_opts,
            SCHEMA=opts.db_schema))

    settings['TIME_ZONE'] = opts.timezone

    settings['TEMPLATE_DEBUG'] = settings['DEBUG'] = \
        opts.web_debug
    if opts.web_debug:
        print("Warning: Setting web_debug to True causes extraordinary "
              "memory leaks.  Only use this setting if you know what "
              "you're doing.")

    if opts.web_prefix:
        settings['MEDIA_URL'] = \
            opts.web_prefix.rstrip('/') + \
            settings['MEDIA_URL']

    logger = logging.getLogger()

    logger.debug("Finalizing Django settings: %s" % settings)
    try:
        django.conf.settings.configure(**settings)
    except RuntimeError:
        if not silent:
            logger.warning("Failed to finalize Django settings: %s" %
                           sys.exc_info()[1])


class _OptionContainer(object):
    """ Container for options loaded at import-time to configure
    databases """
    parse_first = True
    options = [
        Bcfg2.Options.Common.repository,
        Bcfg2.Options.PathOption(
            '-W', '--web-config', cf=('reporting', 'config'),
            default="/etc/bcfg2-web.conf",
            action=Bcfg2.Options.ConfigFileAction,
            help='Web interface configuration file'),
        Bcfg2.Options.Option(
            cf=('database', 'engine'), default='sqlite3',
            help='Database engine', dest='db_engine'),
        Bcfg2.Options.Option(
            cf=('database', 'name'), default='<repository>/etc/bcfg2.sqlite',
            help="Database name", dest="db_name"),
        Bcfg2.Options.Option(
            cf=('database', 'user'), help='Database username', dest='db_user'),
        Bcfg2.Options.Option(
            cf=('database', 'password'), help='Database password',
            dest='db_password'),
        Bcfg2.Options.Option(
            cf=('database', 'host'), help='Database host', dest='db_host'),
        Bcfg2.Options.Option(
            cf=('database', 'port'), help='Database port', dest='db_port'),
        Bcfg2.Options.Option(
            cf=('database', 'schema'), help='Database schema',
            dest='db_schema'),
        Bcfg2.Options.Option(
            cf=('database', 'options'), help='Database options',
            dest='db_opts', type=Bcfg2.Options.Types.comma_dict,
            default=dict()),
        Bcfg2.Options.Option(
            cf=('reporting', 'timezone'), help='Django timezone'),
        Bcfg2.Options.BooleanOption(
            cf=('reporting', 'web_debug'), help='Django debug'),
        Bcfg2.Options.Option(
            cf=('reporting', 'web_prefix'), help='Web prefix')]

    @staticmethod
    def component_parsed_hook(opts):
        """ Finalize the Django config after this component's options
        are parsed. """
        finalize_django_config(opts=opts)

    @staticmethod
    def options_parsed_hook():
        """ Finalize the Django config after all options are parsed.
        This is added in case the DBSettings component isn't added
        early enough in option parsing to be parsed in the 'early'
        phase.  Chances are good that things will break if that
        happens, but we do our best to be a good citizen. """
        finalize_django_config(silent=True)

Bcfg2.Options.get_parser().add_component(_OptionContainer)