import os
from pathlib import Path

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

# Ensure data directory exists
os.makedirs(BASE_DIR / 'data', exist_ok=True)

SECRET_KEY = 'django-insecure-poi-recommender-ktu-bigdata-2024-x7k9m2p4q8r1s5t3u6v0w'

DEBUG = True

ALLOWED_HOSTS = ['*']

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

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 = 'config.urls'

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

WSGI_APPLICATION = 'config.wsgi.application'

DATABASES = {
    'default': {
        'ENGINE': 'django.db.backends.sqlite3',
        'NAME': BASE_DIR / 'data' / '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/'
STATICFILES_DIRS = [BASE_DIR / 'static']

# Self-contained media folder inside the project (works out of the box on extract)
MEDIA_ROOT = BASE_DIR / 'media'
os.makedirs(MEDIA_ROOT, exist_ok=True)
MEDIA_URL = '/media/'

DEFAULT_AUTO_FIELD = 'django.db.models.BigAutoField'

# Source databases — only used by the `load_data` command to rebuild the DB from
# the LD2/LD3/LD4 lab sources. NOT needed at runtime: data/db.sqlite3 already
# contains everything, so the app and fetch_poi_images run without these.
#
# Defaults point to data/ inside this project so it works standalone.
# Override by setting environment variables or dropping files into data/sources/.
LD2_DB_PATH = os.environ.get(
    'LD2_DB_PATH',
    str(BASE_DIR / 'databases' / 'bigdata_ld2_database.sqlite3'),
)
LD3_DB_PATH = os.environ.get(
    'LD3_DB_PATH',
    str(BASE_DIR / 'databases' / 'ld3_claude.sqlite3'),
)
LD4_IMAGES_ROOT = os.environ.get(
    'LD4_IMAGES_ROOT',
    str(BASE_DIR / 'data' / 'sources' / 'images'),
)