from pathlib import Path
import os

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


def env(key: str, default: str | None = None) -> str | None:
    return os.getenv(key, default)


SECRET_KEY = env('DJANGO_SECRET_KEY', 'dev-insecure-key-change-me')
DEBUG = env('DJANGO_DEBUG', 'true').lower() == 'true'
ALLOWED_HOSTS = [h.strip() for h in env('DJANGO_ALLOWED_HOSTS', '*').split(',') if h.strip()]

INSTALLED_APPS = [
    'django.contrib.admin',
    'django.contrib.auth',
    'django.contrib.contenttypes',
    'django.contrib.sessions',
    'django.contrib.messages',
    'django.contrib.staticfiles',
    'channels',
    'core_admin',
    'fupogfakta',
    'lobby',
    'realtime',
    'voice',
]

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 = 'partyhub.urls'

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

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

DB_ENGINE = env('DB_ENGINE', 'django.db.backends.sqlite3')
if DB_ENGINE == 'django.db.backends.sqlite3':
    DATABASES = {
        'default': {
            'ENGINE': DB_ENGINE,
            'NAME': env('DB_NAME', str(BASE_DIR / 'db.sqlite3')),
        }
    }
else:
    DATABASES = {
        'default': {
            'ENGINE': DB_ENGINE,
            'NAME': env('DB_NAME', 'wpp_test'),
            'USER': env('DB_USER', 'wpp_test'),
            'PASSWORD': env('DB_PASSWORD', ''),
            'HOST': env('DB_HOST', '127.0.0.1'),
            'PORT': env('DB_PORT', '3306'),
            'OPTIONS': {'charset': 'utf8mb4'},
        }
    }

TEST_DB_NAME = env('TEST_DB_NAME')
if TEST_DB_NAME:
    DATABASES['default']['TEST'] = {'NAME': TEST_DB_NAME}

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 = 'da'
TIME_ZONE = 'Europe/Copenhagen'
USE_I18N = True
USE_TZ = True

STATIC_URL = '/static/'
STATIC_ROOT = BASE_DIR / 'staticfiles'

DEFAULT_AUTO_FIELD = 'django.db.models.BigAutoField'


USE_SPA_UI_RAW = env('USE_SPA_UI')
if USE_SPA_UI_RAW is None:
    # Backward-compatible fallback while cutover is rolling out.
    USE_SPA_UI_RAW = env('WPP_SPA_ENABLED', 'false')
USE_SPA_UI = USE_SPA_UI_RAW.lower() == 'true'
WPP_SPA_ASSET_BASE = env('WPP_SPA_ASSET_BASE', '/static/frontend/angular/browser').rstrip('/')

CHANNEL_REDIS_HOST = env('CHANNEL_REDIS_HOST', '127.0.0.1')
CHANNEL_REDIS_PORT = int(env('CHANNEL_REDIS_PORT', '6379'))
CHANNEL_LAYERS = {
    'default': {
        'BACKEND': 'channels_redis.core.RedisChannelLayer',
        'CONFIG': {'hosts': [(CHANNEL_REDIS_HOST, CHANNEL_REDIS_PORT)]},
    }
}