"""
Django settings for {{ cookiecutter.project_slug }} project.

Generated by 'django-admin startproject' using Django 5.1.6.

For more information on this file, see
https://docs.djangoproject.com/en/5.1/topics/settings/

For the full list of settings and their values, see
https://docs.djangoproject.com/en/5.1/ref/settings/
"""

from pathlib import Path
import warnings
import os

try:
    import dotenv
    dotenv.load_dotenv()
except ImportError:
    pass

# Suppress deprecation warnings from third-party packages
warnings.filterwarnings('ignore', category=UserWarning, module='dj_rest_auth')

# Build paths inside the project like this: BASE_DIR / 'subdir'.
BASE_DIR = Path(__file__).resolve().parent.parent.parent

# Quick-start development settings - unsuitable for production
# See https://docs.djangoproject.com/en/5.1/howto/deployment/checklist/

# SECURITY WARNING: keep the secret key used in production secret!
SECRET_KEY = os.getenv('SECRET_KEY', 'django-insecure-change-me-in-production')

# SECURITY WARNING: don't run with debug turned on in production!
DEBUG = os.getenv('DEBUG', 'True').lower() in ('true', '1', 'yes')

ALLOWED_HOSTS = [h.strip() for h in os.getenv('ALLOWED_HOSTS', 'localhost,127.0.0.1').split(',') if h.strip()]

# Application definition

INSTALLED_APPS = [
    'django.contrib.admin',
    'django.contrib.auth',
    'django.contrib.contenttypes',
    'django.contrib.sessions',
    'django.contrib.messages',
    'django.contrib.staticfiles',
    'django.contrib.sites',

    # Third party apps
    'authtools',
    'rest_framework',
    'rest_framework.authtoken',
    'allauth',
    'allauth.account',
    'allauth.socialaccount',
    'dj_rest_auth',
    'dj_rest_auth.registration',
    'django_cloud_tasks',

    # Local apps
    '{{ cookiecutter.project_slug }}',
    'accounts',
]

MIDDLEWARE = [
    'django.middleware.security.SecurityMiddleware',
    'whitenoise.middleware.WhiteNoiseMiddleware',
    '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',
    'allauth.account.middleware.AccountMiddleware',
]

ROOT_URLCONF = '{{ cookiecutter.project_slug }}.urls'

TEMPLATES = [
    {
        'BACKEND': 'django.template.backends.django.DjangoTemplates',
        'DIRS': [],
        '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 = '{{ cookiecutter.project_slug }}.wsgi.application'

# Database
# https://docs.djangoproject.com/en/5.1/ref/settings/#databases
# Default: PostgreSQL (recommended for production)
# Set DATABASE_URL environment variable or configure below

DATABASE_URL = os.getenv('DATABASE_URL')
if DATABASE_URL:
    # Parse DATABASE_URL for production
    import dj_database_url
    DATABASES = {
        'default': dj_database_url.parse(DATABASE_URL)
    }
else:
    # Default to PostgreSQL for local development
    DATABASES = {
        'default': {
            'ENGINE': 'django.db.backends.postgresql',
            'NAME': os.getenv('DB_NAME', '{{ cookiecutter.project_slug }}'),
            'HOST': os.getenv('DB_HOST', '127.0.0.1'),
            'PORT': os.getenv('DB_PORT', '5432'),
            'USER': os.getenv('DB_USER', 'postgres'),
            'PASSWORD': os.getenv('DB_PASSWORD', 'postgres'),
        }
    }

# Fallback to SQLite if USE_SQLITE is set (for quick local testing)
if os.getenv('USE_SQLITE', '').lower() in ('true', '1', 'yes'):
    DATABASES = {
        'default': {
            'ENGINE': 'django.db.backends.sqlite3',
            'NAME': BASE_DIR / 'db.sqlite3',
        }
    }

# Password validation
# https://docs.djangoproject.com/en/5.1/ref/settings/#auth-password-validators

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'},
]

# Internationalization
# https://docs.djangoproject.com/en/5.1/topics/i18n/

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

# Static files (CSS, JavaScript, Images)
# https://docs.djangoproject.com/en/5.1/howto/static-files/

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

# Default primary key field type
# https://docs.djangoproject.com/en/5.1/ref/settings/#default-auto-field

DEFAULT_AUTO_FIELD = 'django.db.models.BigAutoField'

SITE_ID = 1

# Custom User Model
AUTH_USER_MODEL = 'accounts.User'

# Django REST Framework Configuration
REST_FRAMEWORK = {
    'DEFAULT_AUTHENTICATION_CLASSES': [
        'rest_framework.authentication.TokenAuthentication',
        'rest_framework.authentication.SessionAuthentication',
    ],
    'DEFAULT_PERMISSION_CLASSES': [
        'rest_framework.permissions.IsAuthenticated',
    ],
    'DEFAULT_RENDERER_CLASSES': [
        'rest_framework.renderers.JSONRenderer',
    ],
    'DEFAULT_PAGINATION_CLASS': 'rest_framework.pagination.PageNumberPagination',
    'PAGE_SIZE': 20,
}

# Django Allauth Configuration
ACCOUNT_LOGIN_METHODS = {'email'}
ACCOUNT_SIGNUP_FIELDS = ['email*', 'password1*', 'password2*']
ACCOUNT_EMAIL_VERIFICATION = 'optional'
ACCOUNT_CONFIRM_EMAIL_ON_GET = True
ACCOUNT_LOGIN_ON_EMAIL_CONFIRMATION = True
ACCOUNT_LOGOUT_ON_GET = True
ACCOUNT_RATE_LIMITS = {'login_failed': '5/5m'}
ACCOUNT_EMAIL_CONFIRMATION_EXPIRE_DAYS = 3
ACCOUNT_PASSWORD_MIN_LENGTH = 8

# Configure allauth to work with email-only user model (no username)
ACCOUNT_USER_MODEL_USERNAME_FIELD = None
ACCOUNT_USER_MODEL_EMAIL_FIELD = 'email'

# dj-rest-auth Configuration
REST_AUTH_SERIALIZERS = {
    'USER_DETAILS_SERIALIZER': 'accounts.api.serializers.UserDetailsSerializer',
}
REST_AUTH_REGISTER_SERIALIZERS = {
    'REGISTER_SERIALIZER': 'accounts.api.serializers.CustomRegisterSerializer',
}

REST_USE_JWT = False
REST_SESSION_LOGIN = False

# Email Configuration (for development)
EMAIL_BACKEND = os.getenv('EMAIL_BACKEND', 'django.core.mail.backends.console.EmailBackend')

# Authentication backends
AUTHENTICATION_BACKENDS = [
    'django.contrib.auth.backends.ModelBackend',
    'allauth.account.auth_backends.AuthenticationBackend',
]

# S3/Backblaze B2 Storage Configuration (optional)
{% if cookiecutter.use_s3_storage == 'y' %}
USE_S3_STORAGE = os.getenv('USE_S3_STORAGE', '').lower() in ('true', '1', 'yes')

{% endif %}
if USE_S3_STORAGE:
    AWS_ACCESS_KEY_ID = os.getenv("AWS_ACCESS_KEY_ID")
    AWS_SECRET_ACCESS_KEY = os.getenv("AWS_SECRET_ACCESS_KEY")
    AWS_STORAGE_BUCKET_NAME = os.getenv("AWS_STORAGE_BUCKET_NAME")
    AWS_S3_ENDPOINT_URL = os.getenv("AWS_S3_ENDPOINT_URL")
    AWS_S3_REGION_NAME = os.getenv("AWS_S3_REGION_NAME")
    AWS_DEFAULT_ACL = None
    AWS_S3_FILE_OVERWRITE = False
    AWS_S3_VERIFY = True
    AWS_QUERYSTRING_AUTH = True
    AWS_QUERYSTRING_EXPIRE = 3600
    AWS_S3_SIGNATURE_VERSION = 's3v4'
    AWS_S3_ADDRESSING_STYLE = 'virtual'

    STORAGES = {
        "default": {"BACKEND": "storages.backends.s3.S3Storage"},
        "staticfiles": {"BACKEND": "whitenoise.storage.CompressedManifestStaticFilesStorage"},
    }
else:
    STORAGES = {
        "default": {"BACKEND": "django.core.files.storage.FileSystemStorage"},
        "staticfiles": {"BACKEND": "whitenoise.storage.CompressedManifestStaticFilesStorage"},
    }

# =============================================================================
# Django Cloud Tasks Configuration
# =============================================================================
# In development, tasks run synchronously in-process (eager mode)
# In production, configure GCP_PROJECT_ID and GCP_LOCATION for Cloud Tasks

DJANGO_CLOUD_TASKS = {
    # Run tasks synchronously in development (no Cloud Tasks infrastructure needed)
    'eager': os.getenv('CLOUD_TASKS_EAGER', 'True').lower() in ('true', '1', 'yes'),

    # GCP settings (used in production when eager=False)
    'project_id': os.getenv('GCP_PROJECT_ID', ''),
    'location': os.getenv('GCP_LOCATION', '{{ cookiecutter.gcp_region }}'),

    # Task queues with different priorities
    'queues': {
        'instant': {
            'name': 'instant',
        },
        'high': {
            'name': 'high',
        },
        'medium': {
            'name': 'medium',
        },
        'low': {
            'name': 'low',
        },
    },

    # Default queue for tasks without explicit queue
    'default_queue': 'medium',
}