"""
Django settings for rfiles.online — standalone file sharing platform.
"""

import os
from pathlib import Path
from dotenv import load_dotenv

BASE_DIR = Path(__file__).resolve().parent.parent
load_dotenv(BASE_DIR / '.env')

SECRET_KEY = os.environ.get('SECRET_KEY', 'django-insecure-rfiles-change-me-in-production')
DEBUG = os.environ.get('DEBUG', 'True') == 'True'
ALLOWED_HOSTS = [h.strip() for h in os.environ.get('ALLOWED_HOSTS', 'localhost,127.0.0.1,.rfiles.online').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',
    'rest_framework',
    'rest_framework.authtoken',
    'corsheaders',
    'simple_history',
    'files',
    'portal',
]

MIDDLEWARE = [
    'django.middleware.security.SecurityMiddleware',
    'whitenoise.middleware.WhiteNoiseMiddleware',
    'corsheaders.middleware.CorsMiddleware',
    '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',
    'simple_history.middleware.HistoryRequestMiddleware',
    'config.middleware.HostBasedURLConfMiddleware',
]

ROOT_URLCONF = 'config.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 = 'config.wsgi.application'

# Database
import dj_database_url
DATABASES = {
    'default': dj_database_url.config(
        default=f'sqlite:///{BASE_DIR / "db.sqlite3"}',
        conn_max_age=600,
    )
}

# Password validation
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
LANGUAGE_CODE = 'en-us'
TIME_ZONE = 'UTC'
USE_I18N = True
USE_TZ = True

# Static files
STATIC_URL = '/static/'
STATIC_ROOT = BASE_DIR / 'staticfiles'
STORAGES = {
    'default': {
        'BACKEND': 'django.core.files.storage.FileSystemStorage',
    },
    'staticfiles': {
        'BACKEND': 'whitenoise.storage.CompressedManifestStaticFilesStorage',
    },
}

# Media files
MEDIA_URL = '/media/'
MEDIA_ROOT = BASE_DIR / 'media'

# File upload limits (no limit)
FILE_UPLOAD_MAX_MEMORY_SIZE = 10737418240  # 10GB
DATA_UPLOAD_MAX_MEMORY_SIZE = 10737418240  # 10GB

DEFAULT_AUTO_FIELD = 'django.db.models.BigAutoField'

# REST Framework
REST_FRAMEWORK = {
    'DEFAULT_AUTHENTICATION_CLASSES': [
        'config.encryptid_auth.EncryptIDAuthentication',
        'rest_framework.authentication.SessionAuthentication',
        'rest_framework.authentication.TokenAuthentication',
    ],
    'DEFAULT_PAGINATION_CLASS': 'rest_framework.pagination.PageNumberPagination',
    'PAGE_SIZE': 50,
}

# CORS
CORS_ALLOWED_ORIGINS = [
    h.strip() for h in os.environ.get('CORS_ALLOWED_ORIGINS', 'http://localhost:3000,http://localhost:8000').split(',') if h.strip()
]
CORS_ALLOWED_ORIGIN_REGEXES = [
    r'^https://.*\.rfiles\.online$',
]
CORS_ALLOW_ALL_ORIGINS = DEBUG

# Celery
CELERY_BROKER_URL = os.environ.get('CELERY_BROKER_URL', 'redis://localhost:6379/0')
CELERY_RESULT_BACKEND = os.environ.get('CELERY_RESULT_BACKEND', 'redis://localhost:6379/0')
CELERY_ACCEPT_CONTENT = ['json']
CELERY_TASK_SERIALIZER = 'json'
CELERY_RESULT_SERIALIZER = 'json'
CELERY_TIMEZONE = 'UTC'
CELERY_BEAT_SCHEDULE = {
    'cleanup-expired-shares': {
        'task': 'files.tasks.cleanup_expired_shares',
        'schedule': 3600,  # every hour
    },
    'cleanup-old-access-logs': {
        'task': 'files.tasks.cleanup_old_access_logs',
        'schedule': 86400,  # daily
    },
}

# rfiles-specific settings
SHARE_BASE_URL = os.environ.get('SHARE_BASE_URL', 'https://rfiles.online')

# EncryptID (passkey auth)
ENCRYPTID_SERVER_URL = os.environ.get('ENCRYPTID_SERVER_URL', 'https://auth.ridentity.online')
ENCRYPTID_JWT_SECRET = os.environ.get('ENCRYPTID_JWT_SECRET', None)  # Set for local JWT verification

# Security (production)
if not DEBUG:
    SECURE_PROXY_SSL_HEADER = ('HTTP_X_FORWARDED_PROTO', 'https')
    CSRF_TRUSTED_ORIGINS = [
        'https://rfiles.online',
        'https://*.rfiles.online',
    ]