import os
from pathlib import Path

BASE_DIR = Path(__file__).resolve().parent.parent

SECRET_KEY = os.getenv('DJANGO_SECRET_KEY', 'unsafe-dev-key')
DEBUG = os.getenv('DJANGO_DEBUG', '0') == '1'
ALLOWED_HOSTS = [h.strip() for h in os.getenv('DJANGO_ALLOWED_HOSTS', 'localhost,127.0.0.1').split(',') if h.strip()]
CSRF_TRUSTED_ORIGINS = [o.strip() for o in os.getenv('DJANGO_CSRF_TRUSTED_ORIGINS', '').split(',') if o.strip()]

# Security hardening
SESSION_COOKIE_HTTPONLY = True
SESSION_COOKIE_SAMESITE = os.getenv('DJANGO_SESSION_COOKIE_SAMESITE', 'Lax')
CSRF_COOKIE_SAMESITE = os.getenv('DJANGO_CSRF_COOKIE_SAMESITE', 'Lax')
SECURE_CONTENT_TYPE_NOSNIFF = True
SECURE_REFERRER_POLICY = os.getenv('DJANGO_SECURE_REFERRER_POLICY', 'same-origin')
X_FRAME_OPTIONS = os.getenv('DJANGO_X_FRAME_OPTIONS', 'DENY')
SECURE_SSL_REDIRECT = os.getenv('DJANGO_SECURE_SSL_REDIRECT', '0') == '1'
SECURE_PROXY_SSL_HEADER = ('HTTP_X_FORWARDED_PROTO', 'https')
_secure_cookies = os.getenv('DJANGO_SECURE_COOKIES', '0') == '1'
SESSION_COOKIE_SECURE = _secure_cookies
CSRF_COOKIE_SECURE = _secure_cookies

# Upload guards
DATA_UPLOAD_MAX_MEMORY_SIZE = int(os.getenv('DJANGO_DATA_UPLOAD_MAX_MEMORY_SIZE', str(10 * 1024 * 1024)))
FILE_UPLOAD_MAX_MEMORY_SIZE = int(os.getenv('DJANGO_FILE_UPLOAD_MAX_MEMORY_SIZE', str(5 * 1024 * 1024)))

INSTALLED_APPS = [
    'django.contrib.admin',
    'django.contrib.auth',
    'django.contrib.contenttypes',
    'django.contrib.sessions',
    'django.contrib.messages',
    'django.contrib.staticfiles',
    'workflows',
]

MIDDLEWARE = [
    'django.middleware.security.SecurityMiddleware',
    'django.contrib.sessions.middleware.SessionMiddleware',
    'django.middleware.locale.LocaleMiddleware',
    'django.middleware.common.CommonMiddleware',
    'django.middleware.csrf.CsrfViewMiddleware',
    'django.contrib.auth.middleware.AuthenticationMiddleware',
    'django.contrib.messages.middleware.MessageMiddleware',
    'django.middleware.clickjacking.XFrameOptionsMiddleware',
    'workflows.middleware.TrialModeMiddleware',
]

ROOT_URLCONF = 'config.urls'

TEMPLATES = [
    {
        'BACKEND': 'django.template.backends.django.DjangoTemplates',
        'DIRS': [],
        'APP_DIRS': True,
        'OPTIONS': {
            'context_processors': [
                'django.template.context_processors.request',
                'django.contrib.auth.context_processors.auth',
                'django.contrib.messages.context_processors.messages',
                'workflows.context_processors.role_context',
            ],
        },
    },
]

WSGI_APPLICATION = 'config.wsgi.application'
ASGI_APPLICATION = 'config.asgi.application'

DATABASES = {
    'default': {
        'ENGINE': 'django.db.backends.postgresql',
        'NAME': os.getenv('POSTGRES_DB', 'onoff'),
        'USER': os.getenv('POSTGRES_USER', 'onoff'),
        'PASSWORD': os.getenv('POSTGRES_PASSWORD', 'onoff'),
        'HOST': os.getenv('POSTGRES_HOST', 'db'),
        'PORT': int(os.getenv('POSTGRES_PORT', '5432')),
    }
}

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'},
]

LANGUAGE_CODE = os.getenv('DJANGO_LANGUAGE_CODE', 'de')
LANGUAGES = [
    ('de', 'Deutsch'),
    ('en', 'English'),
]
LOCALE_PATHS = [BASE_DIR / 'locale']
TIME_ZONE = 'Europe/Berlin'
USE_I18N = True
USE_TZ = True

STATIC_URL = '/static/'
STATIC_ROOT = BASE_DIR / 'staticfiles'
STATIC_ROOT.mkdir(parents=True, exist_ok=True)
MEDIA_URL = '/media/'
MEDIA_ROOT = BASE_DIR / 'media'

DEFAULT_AUTO_FIELD = 'django.db.models.BigAutoField'
LOGIN_URL = '/accounts/login/'
LOGIN_REDIRECT_URL = '/'
LOGOUT_REDIRECT_URL = '/accounts/login/'

EMAIL_BACKEND = 'django.core.mail.backends.smtp.EmailBackend'
EMAIL_HOST = os.getenv('EMAIL_HOST', 'mailhog')
EMAIL_PORT = int(os.getenv('EMAIL_PORT', '1025'))
EMAIL_HOST_USER = os.getenv('EMAIL_HOST_USER', '')
EMAIL_HOST_PASSWORD = os.getenv('EMAIL_HOST_PASSWORD', '')
EMAIL_USE_TLS = os.getenv('EMAIL_USE_TLS', '0') == '1'
EMAIL_USE_SSL = os.getenv('EMAIL_USE_SSL', '0') == '1'
DEFAULT_FROM_EMAIL = os.getenv('DEFAULT_FROM_EMAIL', 'onboarding@example.local')
TEST_NOTIFICATION_EMAIL = os.getenv('TEST_NOTIFICATION_EMAIL', 'hr@example.local')
IT_ONBOARDING_NOTIFICATION_EMAIL = os.getenv('IT_ONBOARDING_NOTIFICATION_EMAIL', 'it@tub.co')
GENERAL_INFO_NOTIFICATION_EMAIL = os.getenv('GENERAL_INFO_NOTIFICATION_EMAIL', 'ingo.einacker@tub.co')
BUSINESS_CARD_NOTIFICATION_EMAIL = os.getenv('BUSINESS_CARD_NOTIFICATION_EMAIL', 'kommunikation@tub.co')
HR_WORKS_NOTIFICATION_EMAIL = os.getenv('HR_WORKS_NOTIFICATION_EMAIL', 'dittrich@tub.co')
KEY_NOTIFICATION_EMAIL = os.getenv('KEY_NOTIFICATION_EMAIL', 'minuth@tub.co')
EMAIL_TEST_MODE = os.getenv('EMAIL_TEST_MODE', '0') == '1'
EMAIL_TEST_REDIRECT = os.getenv('EMAIL_TEST_REDIRECT', TEST_NOTIFICATION_EMAIL)

REDIS_URL = os.getenv('REDIS_URL', 'redis://redis:6379/0')
CELERY_BROKER_URL = REDIS_URL
CELERY_RESULT_BACKEND = REDIS_URL
CELERY_TASK_ALWAYS_EAGER = os.getenv('CELERY_TASK_ALWAYS_EAGER', '0') == '1'
CELERY_BROKER_CONNECTION_RETRY_ON_STARTUP = os.getenv('CELERY_BROKER_CONNECTION_RETRY_ON_STARTUP', '1') == '1'

NEXTCLOUD_BASE_URL = os.getenv('NEXTCLOUD_BASE_URL', '').rstrip('/')
NEXTCLOUD_USERNAME = os.getenv('NEXTCLOUD_USERNAME', '')
NEXTCLOUD_PASSWORD = os.getenv('NEXTCLOUD_PASSWORD', '')
NEXTCLOUD_DIRECTORY = os.getenv('NEXTCLOUD_DIRECTORY', '').strip('/')
NEXTCLOUD_ENABLED = os.getenv('NEXTCLOUD_ENABLED', '0') == '1'

PDF_OUTPUT_DIR = Path(os.getenv('PDF_OUTPUT_DIR', str(MEDIA_ROOT / 'pdfs')))
PDF_OUTPUT_DIR.mkdir(parents=True, exist_ok=True)
PDF_TEMPLATES_DIR = MEDIA_ROOT / 'templates'
PDF_TEMPLATES_DIR.mkdir(parents=True, exist_ok=True)
EMAIL_TEXT_DIR = MEDIA_ROOT / 'email_text'
EMAIL_TEXT_DIR.mkdir(parents=True, exist_ok=True)
BACKUP_OUTPUT_DIR = BASE_DIR / 'backups'
BACKUP_OUTPUT_DIR.mkdir(parents=True, exist_ok=True)
ONBOARDING_SHARED_PDF_LINK = os.getenv('ONBOARDING_SHARED_PDF_LINK', '')
SMTP_TIMEOUT_SECONDS = int(os.getenv('SMTP_TIMEOUT_SECONDS', '20'))

NEXTCLOUD_UPLOAD_TIMEOUT_SECONDS = int(os.getenv('NEXTCLOUD_UPLOAD_TIMEOUT_SECONDS', '30'))
NEXTCLOUD_UPLOAD_RETRIES = int(os.getenv('NEXTCLOUD_UPLOAD_RETRIES', '2'))