import os
from pathlib import Path

import dj_database_url
from dotenv import load_dotenv

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

# Load environment variables from a sibling .env file if present (useful outside Docker)
load_dotenv(BASE_DIR.parent / ".env")

SECRET_KEY = os.environ.get("DJANGO_SECRET_KEY", "insecure-dev-key")
DEBUG = os.environ.get("DJANGO_DEBUG", "0") == "1"
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",
    "rest_framework",
    "rest_framework.authtoken",
    "apps.commerce",
]

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"
ASGI_APPLICATION = "config.asgi.application"

database_url = os.environ.get("DATABASE_URL")

if database_url:
    DATABASES = {
        "default": dj_database_url.parse(database_url, conn_max_age=600),
    }
else:
    DATABASES = {
        "default": {
            "ENGINE": "django.db.backends.postgresql",
            "NAME": os.environ.get("POSTGRES_DB", "postgres"),
            "USER": os.environ.get("POSTGRES_USER", "postgres"),
            "PASSWORD": os.environ.get("POSTGRES_PASSWORD", "postgres"),
            "HOST": os.environ.get("POSTGRES_HOST", "db-gpt"),
            "PORT": os.environ.get("POSTGRES_PORT", "5432"),
        }
    }

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 = os.environ.get("DJANGO_TIME_ZONE", "America/Chicago")
USE_I18N = True
USE_TZ = True

STATIC_URL = "static/"
STATIC_ROOT = BASE_DIR / "staticfiles"

MEDIA_URL = "media/"
MEDIA_ROOT = BASE_DIR / "media"

DEFAULT_AUTO_FIELD = "django.db.models.BigAutoField"

REST_FRAMEWORK = {
    "DEFAULT_AUTHENTICATION_CLASSES": [
        "rest_framework.authentication.SessionAuthentication",
        "rest_framework.authentication.TokenAuthentication",
    ],
    "DEFAULT_PERMISSION_CLASSES": [
        "rest_framework.permissions.IsAuthenticatedOrReadOnly",
    ],
}

CELERY_BROKER_URL = os.environ.get("REDIS_URL", "redis://localhost:6379/0")
CELERY_RESULT_BACKEND = CELERY_BROKER_URL
CELERY_ACCEPT_CONTENT = ["json"]
CELERY_TASK_SERIALIZER = "json"
CELERY_RESULT_SERIALIZER = "json"