import os

from django.urls import reverse_lazy

from django.contrib.messages import constants as messages

try:
    from . import secret
except ImportError:
    raise ImportError(
        "The secret.py file is missing.\n"
        "For a development environment, simply copy secret_example.py"
    )


def import_secret(name):
    """
    Shorthand for importing a value from the secret module and raising an
    informative exception if a secret is missing.
    """
    try:
        return getattr(secret, name)
    except AttributeError:
        raise RuntimeError("Secret missing: {}".format(name))


SECRET_KEY = import_secret("SECRET_KEY")
ADMINS = import_secret("ADMINS")
MANAGERS = ADMINS
EMAIL_HOST = import_secret("EMAIL_HOST")

DBNAME = import_secret("DBNAME")
DBUSER = import_secret("DBUSER")
DBPASSWD = import_secret("DBPASSWD")

SERVER_EMAIL = "wiki@www.eleves.ens.fr"

BASE_DIR = os.path.dirname(os.path.dirname(os.path.dirname(os.path.abspath(__file__))))


INSTALLED_APPS = [
    "django.contrib.admin",
    "django.contrib.auth",
    "django.contrib.contenttypes",
    "django.contrib.sessions",
    "django.contrib.messages",
    "django.contrib.staticfiles",
    "django.contrib.sites",
    "django.contrib.humanize",
    "django_nyt",
    "mptt",
    "sekizai",
    "sorl.thumbnail",
    "widget_tweaks",
    "shared",  # Keep `shared` above `wiki` to override the default templates
    "wiki_groups",
    "wiki",
    "wiki.plugins.attachments",
    "wiki.plugins.notifications",
    "wiki.plugins.images",
    "wiki.plugins.macros",
    "allauth_ens",
    "allauth",
    "allauth.account",
    "allauth.socialaccount",
    "allauth_ens.providers.clipper",
]

MIDDLEWARE = [
    "django.middleware.security.SecurityMiddleware",
    "django.contrib.sessions.middleware.SessionMiddleware",
    "django.middleware.common.CommonMiddleware",
    "django.middleware.csrf.CsrfViewMiddleware",
    "django.contrib.auth.middleware.AuthenticationMiddleware",
    "django.contrib.messages.middleware.MessageMiddleware",
    "django.middleware.clickjacking.XFrameOptionsMiddleware",
]

ROOT_URLCONF = "WikiENS.urls"

TEMPLATES = [
    {
        "BACKEND": "django.template.backends.django.DjangoTemplates",
        "DIRS": [],
        "APP_DIRS": True,
        "OPTIONS": {
            "context_processors": [
                "django.template.context_processors.debug",
                "django.template.context_processors.request",
                "django.contrib.auth.context_processors.auth",
                "django.contrib.messages.context_processors.messages",
                "sekizai.context_processors.sekizai",
            ]
        },
    }
]

WSGI_APPLICATION = "WikiENS.wsgi.application"

SITE_ID = 1


# Database
# https://docs.djangoproject.com/en/1.11/ref/settings/#databases

DATABASES = {
    "default": {
        "ENGINE": "django.db.backends.postgresql",
        "NAME": DBNAME,
        "USER": DBUSER,
        "PASSWORD": DBPASSWD,
        "HOST": "localhost",
    }
}


# Password validation
# https://docs.djangoproject.com/en/1.11/ref/settings/#auth-password-validators

AUTH_PASSWORD_VALIDATORS = [
    {
        "NAME": (
            # XXX. Cette chaîne est très longue… Je la coupe en deux sinon
            # black ne me fiche pas la paix (mais c'est vraiment nul)
            "django.contrib.auth.password_validation."
            "UserAttributeSimilarityValidator"
        )
    },
    {"NAME": "django.contrib.auth.password_validation.MinimumLengthValidator"},
    {"NAME": "django.contrib.auth.password_validation.CommonPasswordValidator"},
    {"NAME": "django.contrib.auth.password_validation.NumericPasswordValidator"},
]


# Internationalization
# https://docs.djangoproject.com/en/1.11/topics/i18n/

LANGUAGE_CODE = "fr-fr"

TIME_ZONE = "Europe/Paris"

USE_I18N = True

USE_L10N = True

USE_TZ = True


# Authentication
# https://docs.djangoproject.com/en/1.11/ref/settings/#auth
# https://django-allauth.readthedocs.io/en/latest/index.html

AUTHENTICATION_BACKENDS = [
    "allauth.account.auth_backends.AuthenticationBackend",
]

ACCOUNT_ADAPTER = "shared.allauth_adapter.AccountAdapter"
SOCIALACCOUNT_ADAPTER = "shared.allauth_adapter.SocialAccountAdapter"

HOME_URL = reverse_lazy("wiki:root")

LOGIN_URL = "/_profil/login/"
LOGOUT_URL = reverse_lazy("account_logout")
LOGIN_REDIRECT_URL = HOME_URL
ACCOUNT_LOGOUT_REDIRECT_URL = HOME_URL


def _user_display(user):
    return user.get_full_name() or user.username


ACCOUNT_AUTHENTICATED_LOGIN_REDIRECTS = False
ACCOUNT_HOME_URL = HOME_URL
ACCOUNT_USER_DISPLAY = _user_display

SOCIALACCOUNT_PROVIDERS = {
    "clipper": {
        "MESSAGE_SUGGEST_LOGOUT_ON_LOGOUT": True,
        "MESSAGE_SUGGEST_LOGOUT_ON_LOGOUT_LEVEL": messages.INFO,
    },
}


# Static / media contents

STATIC_URL = "/_static/"
MEDIA_URL = "/_media/"


# WIKI SETTINGS

WIKI_ATTACHMENTS_EXTENSIONS = [
    "pdf",
    "doc",
    "odt",
    "docx",
    "txt",
    "md",
    "c2p",
    "msc",
    "png",
    "jpg",
    "svg",
    "ai",
    "esf",
    "tex",
]

WIKI_REVISIONS_PER_HOUR = 180
WIKI_REVISIONS_PER_MINUTES = 180

# Dark magic - tell django to use X-Forwarded-*
# This is needed for django-allauth-cas, see
# https://blog.ubuntu.com/2015/08/18/django-behind-a-proxy-fixing-absolute-urls
USE_X_FORWARDED_HOST = True
SECURE_PROXY_SSL_HEADER = ("HTTP_X_FORWARDED_PROTO", "https")

# Use sign up, login, logout, profile settings views of allauth.
WIKI_ACCOUNT_HANDLING = False

# Signup allowed? If it’s not allowed, logged in superusers
# can still access the signup page to create new users.
WIKI_ACCOUNT_SIGNUP_ALLOWED = True

# Globally enable write access for anonymous users, if true anonymous users
# will be treated as the others_write boolean field on models.Article.
WIKI_ANONYMOUS_WRITE = False
WIKI_ANONYMOUS = False