import os
from django.core.exceptions import ImproperlyConfigured


def required(name):
    value = os.environ.get(name)
    if not value or value.startswith("replace-"):
        raise ImproperlyConfigured(f"Set {name} in your local environment.")
    return value


SECRET_KEY = required("DJANGO_SECRET_KEY")
DEBUG = False
ALLOWED_HOSTS = ["localhost", "127.0.0.1"]
ROOT_URLCONF = "config.urls"
INSTALLED_APPS = [
    "django.contrib.auth", "django.contrib.contenttypes", "django.contrib.sessions",
    "django.contrib.messages", "django.contrib.staticfiles", "core", "finance", "ingestion",
]
MIDDLEWARE = [
    "django.middleware.security.SecurityMiddleware",
    "django.contrib.sessions.middleware.SessionMiddleware",
    "django.middleware.common.CommonMiddleware",
    "django.middleware.csrf.CsrfViewMiddleware",
    "django.contrib.messages.middleware.MessageMiddleware",
]
TEMPLATES = [{
    "BACKEND": "django.template.backends.django.DjangoTemplates",
    "DIRS": [],
    "APP_DIRS": True,
    "OPTIONS": {"context_processors": [
        "django.template.context_processors.request",
        "django.contrib.messages.context_processors.messages",
        "core.context.navigation",
    ]},
}]
SESSION_ENGINE = "django.contrib.sessions.backends.signed_cookies"
STATIC_URL = "static/"
LOCAL_SERVE_STATIC = os.environ.get("LOCAL_SERVE_STATIC", "true").casefold() in {"1", "true", "yes"}
DATABASES = {"default": {
    "ENGINE": "django.db.backends.postgresql",
    "NAME": required("DB_NAME"),
    "USER": required("DB_USER"),
    "PASSWORD": required("DB_PASSWORD"),
    "HOST": required("DB_HOST"),
    "PORT": "5432",
    "OPTIONS": {"connect_timeout": 3},
}}
DEFAULT_AUTO_FIELD = "django.db.models.BigAutoField"
USE_TZ = True
TIME_ZONE = "UTC"

IMPORT_ROOT = "/app/imports"
EXPORT_ROOT = os.environ.get("EXPORT_ROOT", "/app/exports")
BACKUP_ROOT = os.environ.get("BACKUP_ROOT", "/app/backups")
BACKUP_VERIFY_ALLOWED = os.environ.get("BACKUP_VERIFY_ALLOWED", "").casefold() in {
    "1", "true", "yes"
}
LIVE_DATABASE_HOST = os.environ.get("LIVE_DB_HOST")
LIVE_DATABASE_NAME = os.environ.get("LIVE_DB_NAME")