"""Django settings for IoT PreTester 4.6 Demo."""

import os
from pathlib import Path

from django.core.exceptions import ImproperlyConfigured

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


def env_bool(name: str, default: bool = False) -> bool:
    return os.environ.get(name, str(default)).strip().lower() in {"1", "true", "yes"}


DEBUG = env_bool("DEBUG", False)
SECRET_KEY = os.environ.get("SECRET_KEY")
if not SECRET_KEY:
    if DEBUG:
        SECRET_KEY = "django-insecure-iot-pretester-4.6-demo-local-only"
    else:
        raise ImproperlyConfigured("SECRET_KEY must be configured when DEBUG is disabled.")

ALLOWED_HOSTS = [
    host.strip()
    for host in os.environ.get("ALLOWED_HOSTS", "localhost,127.0.0.1").split(",")
    if host.strip()
]

INSTALLED_APPS = [
    "django.contrib.admin",
    "django.contrib.auth",
    "django.contrib.contenttypes",
    "django.contrib.sessions",
    "django.contrib.messages",
    "django.contrib.staticfiles",
    "corsheaders",
    "rest_framework",
    "IoTAnalyzer",
]

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

ROOT_URLCONF = "IoTPreTester.urls"
WSGI_APPLICATION = "IoTPreTester.wsgi.application"

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",
            ]
        },
    }
]

DATABASES = {
    "default": {
        "ENGINE": "django.db.backends.sqlite3",
        "NAME": os.environ.get("DATABASE_PATH", BASE_DIR / "db.sqlite3"),
        "OPTIONS": {"timeout": 30},
    }
}

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"},
]

PASSWORD_HASHERS = [
    "django.contrib.auth.hashers.BCryptSHA256PasswordHasher",
    "django.contrib.auth.hashers.PBKDF2PasswordHasher",
]

REST_FRAMEWORK = {
    "DEFAULT_AUTHENTICATION_CLASSES": [
        "IoTAnalyzer.authentication.DemoSessionAuthentication",
    ],
    "DEFAULT_PERMISSION_CLASSES": [
        "rest_framework.permissions.IsAuthenticated",
    ],
    "DEFAULT_THROTTLE_CLASSES": [
        "rest_framework.throttling.UserRateThrottle",
    ],
    "DEFAULT_THROTTLE_RATES": {"user": "20/second"},
}

CORS_ALLOW_ALL_ORIGINS = env_bool("CORS_ALLOW_ALL_ORIGINS", False)
CORS_ALLOWED_ORIGINS = [
    origin.strip()
    for origin in os.environ.get("CORS_ALLOWED_ORIGINS", "http://localhost:3000").split(",")
    if origin.strip()
]
CORS_ALLOW_CREDENTIALS = True

LANGUAGE_CODE = "en-us"
TIME_ZONE = "UTC"
USE_I18N = True
USE_TZ = True

STATIC_URL = "static/"
STATIC_ROOT = BASE_DIR / "staticfiles"
CAPTURE_UPLOAD_DIR = Path(
    os.environ.get("CAPTURE_UPLOAD_DIR", BASE_DIR.parent / "uploads")
)
DEFAULT_AUTO_FIELD = "django.db.models.BigAutoField"
APPEND_SLASH = False

SESSION_COOKIE_HTTPONLY = True
SESSION_COOKIE_SAMESITE = "Lax"
X_FRAME_OPTIONS = "DENY"
SECURE_CONTENT_TYPE_NOSNIFF = True

if not DEBUG:
    SESSION_COOKIE_SECURE = env_bool("SESSION_COOKIE_SECURE", False)
    CSRF_COOKIE_SECURE = env_bool("CSRF_COOKIE_SECURE", False)