"""
Django settings for labhelper project.

Generated by 'django-admin startproject' using Django 5.2.9.

For more information on this file, see
https://docs.djangoproject.com/en/5.2/topics/settings/

For the full list of settings and their values, see
https://docs.djangoproject.com/en/5.2/ref/settings/
"""

import os
import re
from pathlib import Path

# 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/5.2/howto/deployment/checklist/

# SECURITY WARNING: keep the secret key used in production secret!
SECRET_KEY = os.environ.get('DJANGO_SECRET_KEY', 'f0arjg8q3ut4iuqrguqfjaruf0eripIZZN3t1kymy8ugqnj$li2knhha0@gc5v8f3bge=$+gbybj2$jt28uqm')

# SECURITY WARNING: don't run with debug turned on in production!
DEBUG = os.environ.get('DEBUG', 'True').lower() == 'true'

ALLOWED_HOSTS = os.environ.get('ALLOWED_HOSTS', '*').split(',')
ALLOWED_CIDR_NETS = os.environ.get('ALLOWED_CIDR_NETS', '10.0.0.0/16').split(',')


# Application definition

INSTALLED_APPS = [
    'django.contrib.admin',
    'django.contrib.auth',
    'django.contrib.contenttypes',
    'django.contrib.sessions',
    'django.contrib.messages',
    'django.contrib.staticfiles',
    'mozilla_django_oidc',
    'mptt',
    'django_mptt_admin',
    'sorl.thumbnail',
    'boxes',
]

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

ROOT_URLCONF = 'labhelper.urls'

TEMPLATES = [
    {
        'BACKEND': 'django.template.backends.django.DjangoTemplates',
        'DIRS': [BASE_DIR / 'labhelper' / 'templates'],
        'APP_DIRS': True,
        'OPTIONS': {
            'context_processors': [
                'django.template.context_processors.request',
                'django.contrib.auth.context_processors.auth',
                'django.contrib.messages.context_processors.messages',
                'labhelper.context_processors.image_tag',
            ],
        },
    },
]

WSGI_APPLICATION = 'labhelper.wsgi.application'


# Database
# https://docs.djangoproject.com/en/5.2/ref/settings/#databases

DATABASES = {
    'default': {
        'ENGINE': 'django.db.backends.sqlite3',
        'NAME': BASE_DIR / 'data' / 'db.sqlite3',
    }
}


# Password validation
# https://docs.djangoproject.com/en/5.2/ref/settings/#auth-password-validators

AUTH_PASSWORD_VALIDATORS = [
    {
        'NAME': '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/5.2/topics/i18n/

LANGUAGE_CODE = os.environ.get('LANGUAGE_CODE', 'en-us')

TIME_ZONE = os.environ.get('TIME_ZONE', 'UTC')

USE_I18N = os.environ.get('USE_I18N', 'True').lower() == 'true'

USE_TZ = os.environ.get('USE_TZ', 'True').lower() == 'true'


# Static files (CSS, JavaScript, Images)
# https://docs.djangoproject.com/en/5.2/howto/static-files/

STATIC_URL = os.environ.get('STATIC_URL', '/static/')
STATIC_ROOT = BASE_DIR / 'staticfiles'

# WhiteNoise static file serving configuration
STATICFILES_STORAGE = 'whitenoise.storage.CompressedManifestStaticFilesStorage'

# Media files (user uploads)
MEDIA_URL = os.environ.get('MEDIA_URL', '/media/')
MEDIA_ROOT = BASE_DIR / 'data' / 'media'

# Default primary key field type
# https://docs.djangoproject.com/en/5.2/ref/settings/#default-auto-field

DEFAULT_AUTO_FIELD = 'django.db.models.BigAutoField'

CSRF_TRUSTED_ORIGINS=os.environ.get('CSRF_TRUSTED_ORIGINS', 'https://labhelper.adebaumann.com,http://127.0.0.1:8000').split(',')

LOGIN_URL = os.environ.get('LOGIN_URL', 'oidc_authentication_init')
LOGIN_REDIRECT_URL = os.environ.get('LOGIN_REDIRECT_URL', 'index')
LOGOUT_REDIRECT_URL = os.environ.get('LOGOUT_REDIRECT_URL', 'login')

AUTHENTICATION_BACKENDS = [
    'labhelper.auth_backend.KeycloakOIDCBackend',
    # ModelBackend kept as fallback for Django admin emergency access
    'django.contrib.auth.backends.ModelBackend',
]

# ---------------------------------------------------------------------------
# Keycloak / OIDC configuration
#
# Set OIDC_OP_BASE_URL to your realm URL, e.g.:
#   https://keycloak.example.com/realms/myrealm
#
# All individual endpoints are derived from OIDC_OP_BASE_URL automatically.
# You can override any individual endpoint with its own env var.
# ---------------------------------------------------------------------------
_oidc_base = os.environ.get('OIDC_OP_BASE_URL', '').rstrip('/')
_oidc_connect = f'{_oidc_base}/protocol/openid-connect' if _oidc_base else ''

OIDC_RP_CLIENT_ID = os.environ.get('OIDC_RP_CLIENT_ID', '')
OIDC_RP_CLIENT_SECRET = os.environ.get('OIDC_RP_CLIENT_SECRET', '')
OIDC_RP_SIGN_ALGO = 'RS256'
OIDC_RP_SCOPES = 'openid email profile'
OIDC_USE_PKCE = True

OIDC_OP_AUTHORIZATION_ENDPOINT = os.environ.get('OIDC_OP_AUTHORIZATION_ENDPOINT', f'{_oidc_connect}/auth')
OIDC_OP_TOKEN_ENDPOINT = os.environ.get('OIDC_OP_TOKEN_ENDPOINT', f'{_oidc_connect}/token')
OIDC_OP_USER_ENDPOINT = os.environ.get('OIDC_OP_USER_ENDPOINT', f'{_oidc_connect}/userinfo')
OIDC_OP_JWKS_ENDPOINT = os.environ.get('OIDC_OP_JWKS_ENDPOINT', f'{_oidc_connect}/certs')
OIDC_OP_LOGOUT_ENDPOINT = os.environ.get('OIDC_OP_LOGOUT_ENDPOINT', f'{_oidc_connect}/logout')

# Store the ID token in the session so Keycloak logout can use id_token_hint
OIDC_STORE_ID_TOKEN = True

# Redirect to the static login page on auth failure instead of looping back into OIDC
OIDC_AUTHENTICATION_FAILURE_REDIRECT_URL = os.environ.get('OIDC_AUTHENTICATION_FAILURE_REDIRECT_URL', '/login/')

# Exempt endpoints and uploaded media from the session-refresh middleware.
#
# Media URLs are already served without a login_required view. If an embedded
# image request is redirected into a silent OIDC refresh, the callback happens
# in a subresource context and browsers can withhold the session cookie, causing
# the OIDC state check to fail with HTTP 400.
OIDC_EXEMPT_URLS = [
    'search_api',
    re.compile(rf'^{re.escape(MEDIA_URL)}'),
]