"""
Django settings for config project.

Generated by 'django-admin startproject' using Django 3.2.5.

For more information on this file, see
https://docs.djangoproject.com/en/3.2/topics/settings/

For the full list of settings and their values, see
https://docs.djangoproject.com/en/3.2/ref/settings/
"""

import hashlib
from os import environ, path
from pathlib import Path

import ldap
from corsheaders.defaults import default_headers
from django_auth_ldap.config import LDAPSearch
from home.src.ta.config import AppConfig

# Build paths inside the project like this: BASE_DIR / 'subdir'.
BASE_DIR = Path(__file__).resolve().parent.parent


# Quick-start development settings - unsuitable for production
# See https://docs.djangoproject.com/en/3.2/howto/deployment/checklist/

PW_HASH = hashlib.sha256(environ.get("TA_PASSWORD").encode())
SECRET_KEY = PW_HASH.hexdigest()

# SECURITY WARNING: don't run with debug turned on in production!
DEBUG = bool(environ.get("DJANGO_DEBUG"))

ALLOWED_HOSTS = [i.strip() for i in environ.get("TA_HOST").split()]

CSRF_TRUSTED_ORIGINS = []
for host in ALLOWED_HOSTS:
    if host.startswith("http://") or host.startswith("https://"):
        CSRF_TRUSTED_ORIGINS.append(host)
    else:
        CSRF_TRUSTED_ORIGINS.append(f"http://{host}")


# Application definition

INSTALLED_APPS = [
    "home.apps.HomeConfig",
    "django.contrib.admin",
    "django.contrib.auth",
    "django.contrib.contenttypes",
    "django.contrib.sessions",
    "django.contrib.messages",
    "corsheaders",
    "whitenoise.runserver_nostatic",
    "django.contrib.staticfiles",
    "django.contrib.humanize",
    "rest_framework",
    "rest_framework.authtoken",
    "api",
]

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

ROOT_URLCONF = "config.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",
            ],
        },
    },
]

WSGI_APPLICATION = "config.wsgi.application"

if bool(environ.get("TA_LDAP")):
    # pylint: disable=global-at-module-level
    global AUTH_LDAP_SERVER_URI
    AUTH_LDAP_SERVER_URI = environ.get("TA_LDAP_SERVER_URI")

    global AUTH_LDAP_BIND_DN
    AUTH_LDAP_BIND_DN = environ.get("TA_LDAP_BIND_DN")

    global AUTH_LDAP_BIND_PASSWORD
    AUTH_LDAP_BIND_PASSWORD = environ.get("TA_LDAP_BIND_PASSWORD")

    global AUTH_LDAP_USER_SEARCH
    # pylint: disable=no-member
    AUTH_LDAP_USER_SEARCH = LDAPSearch(
        environ.get("TA_LDAP_USER_BASE"),
        ldap.SCOPE_SUBTREE,
        "(&(uid=%(user)s)" + environ.get("TA_LDAP_USER_FILTER") + ")",
    )

    global AUTH_LDAP_USER_ATTR_MAP
    AUTH_LDAP_USER_ATTR_MAP = {
        "username": "uid",
        "first_name": "givenName",
        "last_name": "sn",
        "email": "mail",
    }

    if bool(environ.get("TA_LDAP_DISABLE_CERT_CHECK")):
        global AUTH_LDAP_GLOBAL_OPTIONS
        AUTH_LDAP_GLOBAL_OPTIONS = {
            ldap.OPT_X_TLS_REQUIRE_CERT: ldap.OPT_X_TLS_NEVER,
        }

    global AUTHENTICATION_BACKENDS
    AUTHENTICATION_BACKENDS = ("django_auth_ldap.backend.LDAPBackend",)

# Database
# https://docs.djangoproject.com/en/3.2/ref/settings/#databases

CACHE_DIR = AppConfig().config["application"]["cache_dir"]
DB_PATH = path.join(CACHE_DIR, "db.sqlite3")
DATABASES = {
    "default": {
        "ENGINE": "django.db.backends.sqlite3",
        "NAME": DB_PATH,
    }
}


# Password validation
# https://docs.djangoproject.com/en/3.2/ref/settings/#auth-password-validators

AUTH_PASSWORD_VALIDATORS = [
    {
        "NAME": "django.contrib.auth.password_validation.UserAttributeSimilarityValidator",  # noqa: E501
    },
    {
        "NAME": "django.contrib.auth.password_validation.MinimumLengthValidator",  # noqa: E501
    },
    {
        "NAME": "django.contrib.auth.password_validation.CommonPasswordValidator",  # noqa: E501
    },
    {
        "NAME": "django.contrib.auth.password_validation.NumericPasswordValidator",  # noqa: E501
    },
]

AUTH_USER_MODEL = "home.Account"


# Internationalization
# https://docs.djangoproject.com/en/3.2/topics/i18n/

LANGUAGE_CODE = "en-us"
TIME_ZONE = environ.get("TZ") or "UTC"
USE_I18N = True
USE_L10N = True
USE_TZ = True


# Static files (CSS, JavaScript, Images)
# https://docs.djangoproject.com/en/3.2/howto/static-files/

STATIC_URL = "/static/"
STATICFILES_DIRS = (str(BASE_DIR.joinpath("static")),)
STATIC_ROOT = str(BASE_DIR.joinpath("staticfiles"))
STATICFILES_STORAGE = "whitenoise.storage.CompressedManifestStaticFilesStorage"

# Default primary key field type
# https://docs.djangoproject.com/en/3.2/ref/settings/#default-auto-field

DEFAULT_AUTO_FIELD = "django.db.models.BigAutoField"

LOGIN_URL = "/login/"
LOGOUT_REDIRECT_URL = "/login/"

# Cors needed for browser extension
# background.js makes the request so HTTP_ORIGIN will be from extension
if environ.get("DISABLE_CORS"):
    # disable cors
    CORS_ORIGIN_ALLOW_ALL = True
else:
    CORS_ALLOWED_ORIGIN_REGEXES = [
        r"moz-extension://*",
        r"chrome-extension://*",
    ]
    CORS_ALLOWED_ORIGINS = ["http://localhost:3000"]


CORS_ALLOW_HEADERS = list(default_headers) + [
    "mode",
]

# TA application settings
TA_UPSTREAM = "https://github.com/tubearchivist/tubearchivist"
TA_VERSION = "v0.2.2"