from pathlib import Path
import os
import dj_database_url

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

SECRET_KEY = os.getenv('SECRET_KEY', 'django-insecure-change-me-in-production')
DEBUG = os.getenv('DEBUG', 'True') == 'True'
ALLOWED_HOSTS = os.getenv('ALLOWED_HOSTS', '*').split(',')
CORS_ALLOW_ALL_ORIGINS = True

# Cross-service URLs (set these in HF Space secrets)
PREDICTOR_SPACE_URL = os.getenv('PREDICTOR_SPACE_URL', '/')
CHATBOT_SPACE_URL = os.getenv('CHATBOT_SPACE_URL', '/chatbot/')

CSRF_TRUSTED_ORIGINS = os.getenv(
    'CSRF_TRUSTED_ORIGINS',
    'http://localhost'
).split(',')

INSTALLED_APPS = [
    'django.contrib.admin',
    'django.contrib.auth',
    'django.contrib.contenttypes',
    'django.contrib.sessions',
    'django.contrib.messages',
    'django.contrib.staticfiles',
    'Locator.apps.LocatorConfig',
]

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

ROOT_URLCONF = 'ConstellationPredictor.urls'

TEMPLATES = [
    {
        'BACKEND': 'django.template.backends.django.DjangoTemplates',
        'DIRS': [BASE_DIR / 'templates'],  # shared base.html lives here
        'APP_DIRS': True,
        'OPTIONS': {
            'context_processors': [
                'django.template.context_processors.request',
                'django.contrib.auth.context_processors.auth',
                'django.contrib.messages.context_processors.messages',
                'Locator.context_processors.space_urls',
            ],
        },
    },
]

WSGI_APPLICATION = 'ConstellationPredictor.wsgi.application'

DATABASES = {
    'default': dj_database_url.config(
        default=f"sqlite:///{BASE_DIR / 'db.sqlite3'}"
    )
}

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 = 'en-us'
TIME_ZONE = 'UTC'
USE_I18N = True
USE_TZ = True

STATIC_URL = 'static/'
STATIC_ROOT = BASE_DIR / 'staticfiles'
DEFAULT_AUTO_FIELD = 'django.db.models.BigAutoField'