"""
Django settings for mac_attendance project - BASE configuration.

Configuración compartida entre todos los entornos (desarrollo y producción).
NO incluye configuraciones específicas de entorno como DEBUG, ALLOWED_HOSTS, etc.
"""

from pathlib import Path
from datetime import timedelta
from decouple import config
import os

# Build paths inside the project
BASE_DIR = Path(__file__).resolve().parent.parent.parent

# SECURITY WARNING: keep the secret key used in production secret!
SECRET_KEY = config('SECRET_KEY')

# 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_simplejwt',
    'corsheaders',
    'import_export',
    'authentication',
    'events',
    'attendance',
]

MIDDLEWARE = [
    'corsheaders.middleware.CorsMiddleware',
    'django.middleware.security.SecurityMiddleware',
    'django.contrib.sessions.middleware.SessionMiddleware',
    'django.middleware.common.CommonMiddleware',
    'authentication.middleware.DisableCSRFOnAPIMiddleware',  # Exentar API de CSRF (usamos JWT)
    'django.middleware.csrf.CsrfViewMiddleware',
    'django.contrib.auth.middleware.AuthenticationMiddleware',
    'django.contrib.messages.middleware.MessageMiddleware',
    'django.middleware.clickjacking.XFrameOptionsMiddleware',
    'authentication.middleware.AuditMiddleware',  # Auditoría de seguridad
]

ROOT_URLCONF = 'mac_attendance.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 = 'mac_attendance.wsgi.application'

# Database Configuration - PostgreSQL
DATABASES = {
    'default': {
        'ENGINE': 'django.db.backends.postgresql',
        'NAME': config('DB_NAME', default='mac_attendance'),
        'USER': config('DB_USER', default='mac_user'),
        'PASSWORD': config('DB_PASSWORD', default='mac_password_2024_secure'),
        'HOST': config('DB_HOST', default='db'),
        'PORT': config('DB_PORT', default='5432'),
        'CONN_MAX_AGE': 600,  # Conexiones persistentes para mejor rendimiento
        'OPTIONS': {
            'connect_timeout': 10,
        }
    }
}

# 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 = 'es-mx'
TIME_ZONE = 'America/Mexico_City'
USE_I18N = True
USE_TZ = True

# Static files (CSS, JavaScript, Images)
STATIC_URL = '/static/'
STATIC_ROOT = BASE_DIR / 'staticfiles'

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

# Default primary key field type
DEFAULT_AUTO_FIELD = 'django.db.models.BigAutoField'

# CORS settings
CORS_ALLOW_CREDENTIALS = True

# Exentar todas las rutas de API del CSRF check (usamos JWT para seguridad)
CSRF_EXEMPT_URLS = [r'^api/.*$']

# Django REST Framework
REST_FRAMEWORK = {
    'DEFAULT_AUTHENTICATION_CLASSES': [
        'rest_framework_simplejwt.authentication.JWTAuthentication',
        'rest_framework.authentication.SessionAuthentication',  # Mantener para Django admin
    ],
    'DEFAULT_PERMISSION_CLASSES': [
        'rest_framework.permissions.IsAuthenticated',
    ],
    'EXCEPTION_HANDLER': 'mac_attendance.exceptions.custom_exception_handler',
}

# JWT Settings
SIMPLE_JWT = {
    'ACCESS_TOKEN_LIFETIME': timedelta(hours=1),
    'REFRESH_TOKEN_LIFETIME': timedelta(days=7),
    'ROTATE_REFRESH_TOKENS': True,
    'BLACKLIST_AFTER_ROTATION': False,
    'UPDATE_LAST_LOGIN': True,

    'ALGORITHM': 'HS256',
    'SIGNING_KEY': SECRET_KEY,
    'VERIFYING_KEY': None,

    'AUTH_HEADER_TYPES': ('Bearer',),
    'AUTH_HEADER_NAME': 'HTTP_AUTHORIZATION',
    'USER_ID_FIELD': 'id',
    'USER_ID_CLAIM': 'user_id',

    'AUTH_TOKEN_CLASSES': ('rest_framework_simplejwt.tokens.AccessToken',),
    'TOKEN_TYPE_CLAIM': 'token_type',
}

# Crear directorio de logs si no existe
LOGS_DIR = BASE_DIR / 'logs'
if not os.path.exists(LOGS_DIR):
    os.makedirs(LOGS_DIR)