# ⁻*- coding: utf-8 -*-
# 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 version 3 for
# more details.
#
# You should have received a copy of the GNU General Public License version 3
# along with this program; if not, write to the Free Software Foundation, Inc., 51
# Franklin Street, Fifth Floor, Boston, MA 02110-1301 USA.
#
# (c) 2015 Valentin Samir
"""Default values for the app's settings"""
from django.conf import settings
from django.contrib.staticfiles.templatetags.staticfiles import static

import re
import six


def setting_default(name, default_value):
    """if the config `name` is not set, set it the `default_value`"""
    value = getattr(settings, name, default_value)
    setattr(settings, name, value)

setting_default('CAS_LOGO_URL', static("cas_server/logo.png"))

setting_default('CAS_LOGIN_TEMPLATE', 'cas_server/login.html')
setting_default('CAS_WARN_TEMPLATE', 'cas_server/warn.html')
setting_default('CAS_LOGGED_TEMPLATE', 'cas_server/logged.html')
setting_default('CAS_LOGOUT_TEMPLATE', 'cas_server/logout.html')
setting_default('CAS_AUTH_CLASS', 'cas_server.auth.DjangoAuthUser')
# All CAS implementation MUST support ST and PT up to 32 chars,
# PGT and PGTIOU up to 64 chars and it is RECOMMENDED that all
# tickets up to 256 chars are supports so we use 64 for the default
# len.
setting_default('CAS_TICKET_LEN', 64)

setting_default('CAS_LT_LEN', settings.CAS_TICKET_LEN)
setting_default('CAS_ST_LEN', settings.CAS_TICKET_LEN)
setting_default('CAS_PT_LEN', settings.CAS_TICKET_LEN)
setting_default('CAS_PGT_LEN', settings.CAS_TICKET_LEN)
setting_default('CAS_PGTIOU_LEN', settings.CAS_TICKET_LEN)

setting_default('CAS_TICKET_VALIDITY', 60)
setting_default('CAS_PGT_VALIDITY', 3600)
setting_default('CAS_TICKET_TIMEOUT', 24*3600)
setting_default('CAS_PROXY_CA_CERTIFICATE_PATH', True)
setting_default('CAS_REDIRECT_TO_LOGIN_AFTER_LOGOUT', False)

setting_default('CAS_AUTH_SHARED_SECRET', '')

setting_default('CAS_LOGIN_TICKET_PREFIX', 'LT')
# Service tickets MUST begin with the characters ST so you should not change this
# Services MUST be able to accept service tickets of up to 32 characters in length
setting_default('CAS_SERVICE_TICKET_PREFIX', 'ST')
# Proxy tickets SHOULD begin with the characters, PT.
# Back-end services MUST be able to accept proxy tickets of up to 32 characters.
setting_default('CAS_PROXY_TICKET_PREFIX', 'PT')
# Proxy-granting tickets SHOULD begin with the characters PGT
# Services MUST be able to handle proxy-granting tickets of up to 64
setting_default('CAS_PROXY_GRANTING_TICKET_PREFIX', 'PGT')
# Proxy-granting ticket IOUs SHOULD begin with the characters, PGTIOU
# Services MUST be able to handle PGTIOUs of up to 64 characters in length.
setting_default('CAS_PROXY_GRANTING_TICKET_IOU_PREFIX', 'PGTIOU')

# Maximum number of parallel single log out requests send
# if more requests need to be send, there are queued
setting_default('CAS_SLO_MAX_PARALLEL_REQUESTS', 10)
# SLO request timeout.
setting_default('CAS_SLO_TIMEOUT', 5)

setting_default('CAS_SQL_HOST', 'localhost')
setting_default('CAS_SQL_USERNAME', '')
setting_default('CAS_SQL_PASSWORD', '')
setting_default('CAS_SQL_DBNAME', '')
setting_default('CAS_SQL_DBCHARSET', 'utf8')
setting_default('CAS_SQL_USER_QUERY', 'SELECT user AS usersame, pass AS '
                'password, users.* FROM users WHERE user = %s')
setting_default('CAS_SQL_PASSWORD_CHECK', 'crypt')  # crypt or plain

setting_default('CAS_TEST_USER', 'test')
setting_default('CAS_TEST_PASSWORD', 'test')
setting_default(
    'CAS_TEST_ATTRIBUTES',
    {
        'nom': 'Nymous',
        'prenom': 'Ano',
        'email': 'anonymous@example.net',
        'alias': ['demo1', 'demo2']
    }
)

setting_default('CAS_ENABLE_AJAX_AUTH', False)

setting_default('CAS_FEDERATE', False)
# A dict of "provider suffix" -> (provider CAS server url, CAS version, verbose name)
setting_default('CAS_FEDERATE_PROVIDERS', {})
setting_default('CAS_FEDERATE_REMEMBER_TIMEOUT', 604800)  # one week

if settings.CAS_FEDERATE:
    settings.CAS_AUTH_CLASS = "cas_server.auth.CASFederateAuth"

#  create CAS_FEDERATE_PROVIDERS_LIST default value if not set: list of
#  the keys of CAS_FEDERATE_PROVIDERS in natural order: 2 < 10 < 20 < a = A < … < z = Z
try:
    getattr(settings, 'CAS_FEDERATE_PROVIDERS_LIST')
except AttributeError:
    __CAS_FEDERATE_PROVIDERS_LIST = list(settings.CAS_FEDERATE_PROVIDERS.keys())

    def __cas_federate_providers_list_sort(key):
        if len(settings.CAS_FEDERATE_PROVIDERS[key]) > 2:
            key = settings.CAS_FEDERATE_PROVIDERS[key][2].lower()
        else:
            key = key.lower()
        if isinstance(key, six.string_types) or isinstance(key, six.text_type):
            return tuple(
                int(num) if num else alpha
                for num, alpha in __cas_federate_providers_list_sort.tokenize(key)
            )
        else:
            return key
    __cas_federate_providers_list_sort.tokenize = re.compile(r'(\d+)|(\D+)').findall
    __CAS_FEDERATE_PROVIDERS_LIST.sort(key=__cas_federate_providers_list_sort)

    setting_default('CAS_FEDERATE_PROVIDERS_LIST', __CAS_FEDERATE_PROVIDERS_LIST)