"""
Django settings for Akompta project.

Generated by 'django-admin startproject' using Django 5.2.8.

For more information on this file, see
https://docs.djangoproject.com/en/5.2/topics/settings/

For the full list of settings and their values, see
https://docs.djangoproject.com/en/5.2/ref/settings/
"""

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

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


# Quick-start development settings - unsuitable for production
# See https://docs.djangoproject.com/en/5.2/howto/deployment/checklist/

# SECURITY WARNING: keep the secret key used in production secret!
SECRET_KEY = config('SECRET_KEY', default='django-insecure-3m1!a3u-z=5k8x9y#-954&3ree&mr&$o97fuy8ds*8dox!(rvx')

# SECURITY WARNING: don't run with debug turned on in production!
DEBUG = config('DEBUG', default=True, cast=bool)

ALLOWED_HOSTS = config('ALLOWED_HOSTS', default='*', cast=Csv())

# CSRF Trusted Origins for Hugging Face and Frontend
CSRF_TRUSTED_ORIGINS = config(
    'CSRF_TRUSTED_ORIGINS', 
    default='https://*.hf.space,https://*.huggingface.co,https://akompta-ai-flame.vercel.app,https://cosmolabhub-akomptabackend.hf.space', 
    cast=Csv()
)


# Application definition

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

    # Third party
    'rest_framework',
    'rest_framework_simplejwt',
    'corsheaders',
    'django_filters',
    
    # Local apps
    'api',  # Votre app principale
]

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',
]

ROOT_URLCONF = 'Akompta.urls'

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


# Database
# https://docs.djangoproject.com/en/5.2/ref/settings/#databases

DATABASES = {
    'default': {
        'ENGINE': 'django.db.backends.sqlite3',
        'NAME': BASE_DIR / 'db.sqlite3',
    }
}


# Password validation
# https://docs.djangoproject.com/en/5.2/ref/settings/#auth-password-validators

AUTH_PASSWORD_VALIDATORS = [
    {
        'NAME': 'django.contrib.auth.password_validation.UserAttributeSimilarityValidator',
    },
    {
        'NAME': 'django.contrib.auth.password_validation.MinimumLengthValidator',
        'OPTIONS': {
            'min_length': 8,
        }
    },
    {
        'NAME': 'django.contrib.auth.password_validation.CommonPasswordValidator',
    },
    {
        'NAME': 'django.contrib.auth.password_validation.NumericPasswordValidator',
    },
]


# Internationalization
# https://docs.djangoproject.com/en/5.2/topics/i18n/

LANGUAGE_CODE = 'fr-fr'

TIME_ZONE = 'UTC'

USE_I18N = True

USE_TZ = True


# Static files (CSS, JavaScript, Images)
# https://docs.djangoproject.com/en/5.2/howto/static-files/

STATIC_URL = '/static/'
STATIC_ROOT = BASE_DIR / 'static'
STATICFILES_STORAGE = 'whitenoise.storage.CompressedManifestStaticFilesStorage'

MEDIA_URL = '/media/'
MEDIA_ROOT = BASE_DIR / 'media'

# Default primary key field type
# https://docs.djangoproject.com/en/5.2/ref/settings/#default-auto-field

DEFAULT_AUTO_FIELD = 'django.db.models.BigAutoField'


AUTH_USER_MODEL = 'api.User'


# REST Framework Configuration
REST_FRAMEWORK = {
    'DEFAULT_AUTHENTICATION_CLASSES': [
        'rest_framework_simplejwt.authentication.JWTAuthentication',
    ],
    'DEFAULT_PERMISSION_CLASSES': [
        'rest_framework.permissions.IsAuthenticated',
    ],
    'DEFAULT_PAGINATION_CLASS': 'rest_framework.pagination.PageNumberPagination',
    'PAGE_SIZE': 20,
    'DEFAULT_FILTER_BACKENDS': [
        'django_filters.rest_framework.DjangoFilterBackend',
        'rest_framework.filters.SearchFilter',
        'rest_framework.filters.OrderingFilter',
    ],
    'DEFAULT_THROTTLE_CLASSES': [
        'rest_framework.throttling.AnonRateThrottle',
        'rest_framework.throttling.UserRateThrottle'
    ],
    'DEFAULT_THROTTLE_RATES': {
        'anon': '100/hour',
        'user': '1000/hour'
    },
    'EXCEPTION_HANDLER': 'api.exceptions.custom_exception_handler',
}


# Simple JWT Configuration
SIMPLE_JWT = {
    'ACCESS_TOKEN_LIFETIME': timedelta(days=1),
    'REFRESH_TOKEN_LIFETIME': timedelta(days=30),
    'ROTATE_REFRESH_TOKENS': True,
    'BLACKLIST_AFTER_ROTATION': True,
    'UPDATE_LAST_LOGIN': True,
    
    'ALGORITHM': 'HS256',
    'SIGNING_KEY': SECRET_KEY,
    'VERIFYING_KEY': None,
    'AUDIENCE': None,
    'ISSUER': 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',
}


# CORS Configuration
CORS_ALLOWED_ORIGINS = config(
    'CORS_ALLOWED_ORIGINS',
    default='http://localhost:3000,http://localhost:5173,http://127.0.0.1:3000,http://127.0.0.1:5173,https://akompta-ai-flame.vercel.app,https://cosmolabhub-akomptabackend.hf.space',
    cast=Csv()
)

CORS_ALLOW_CREDENTIALS = True

CORS_ALLOW_METHODS = [
    'DELETE',
    'GET',
    'OPTIONS',
    'PATCH',
    'POST',
    'PUT',
]

CORS_ALLOW_HEADERS = [
    'accept',
    'accept-encoding',
    'authorization',
    'content-type',
    'dnt',
    'origin',
    'user-agent',
    'x-csrftoken',
    'x-requested-with',
]


# File Upload Settings
FILE_UPLOAD_MAX_MEMORY_SIZE = 5242880  # 5MB
DATA_UPLOAD_MAX_MEMORY_SIZE = 5242880  # 5MB

# Allowed image formats
ALLOWED_IMAGE_EXTENSIONS = ['jpg', 'jpeg', 'png', 'gif', 'webp']
MAX_IMAGE_SIZE = 5 * 1024 * 1024  # 5MB


# Email Configuration (pour password reset)
EMAIL_BACKEND = 'django.core.mail.backends.smtp.EmailBackend'
EMAIL_HOST = os.environ.get('EMAIL_HOST', 'smtp.gmail.com')
EMAIL_PORT = int(os.environ.get('EMAIL_PORT', '587'))
EMAIL_USE_TLS = True
EMAIL_HOST_USER = os.environ.get('EMAIL_HOST_USER', '')
EMAIL_HOST_PASSWORD = os.environ.get('EMAIL_HOST_PASSWORD', '')
DEFAULT_FROM_EMAIL = os.environ.get('DEFAULT_FROM_EMAIL', 'noreply@akompta.com')


# Security Settings for Production
if not DEBUG:
    # IMPORTANT: Ne pas activer SECURE_SSL_REDIRECT sur Hugging Face Spaces
    # Le reverse proxy de HF gère déjà HTTPS, activer cette option cause une boucle de redirection
    SECURE_SSL_REDIRECT = False
    
    # Permet à Django de reconnaître les requêtes HTTPS via le proxy
    SECURE_PROXY_SSL_HEADER = ('HTTP_X_FORWARDED_PROTO', 'https')
    
    SESSION_COOKIE_SECURE = True
    CSRF_COOKIE_SECURE = True
    SECURE_BROWSER_XSS_FILTER = True
    SECURE_CONTENT_TYPE_NOSNIFF = True
    X_FRAME_OPTIONS = 'DENY'
    SECURE_HSTS_SECONDS = 31536000
    SECURE_HSTS_INCLUDE_SUBDOMAINS = True
    SECURE_HSTS_PRELOAD = True


# Logging Configuration
LOGGING = {
    'version': 1,
    'disable_existing_loggers': False,
    'formatters': {
        'verbose': {
            'format': '{levelname} {asctime} {module} {message}',
            'style': '{',
        },
    },
    'handlers': {
        'console': {
            'class': 'logging.StreamHandler',
            'formatter': 'verbose',
        },
        'file': {
            'class': 'logging.FileHandler',
            'filename': BASE_DIR / 'logs' / 'django.log',
            'formatter': 'verbose',
        },
    },
    'root': {
        'handlers': ['console', 'file'],
        'level': 'INFO',
    },
    'loggers': {
        'django': {
            'handlers': ['console', 'file'],
            'level': 'INFO',
            'propagate': False,
        },
    },
}