import os
from pathlib import Path
from datetime import timedelta
from dotenv import load_dotenv

# Construction des chemins
BASE_DIR = Path(__file__).resolve().parent.parent

# Charge les variables du fichier .env
load_dotenv(BASE_DIR / ".env")

# SÉCURITÉ : À changer en production !
SECRET_KEY = 'django-insecure-CHANGE-ME-IN-PROD-goon-project-key'
DEBUG = True 

ALLOWED_HOSTS = ["*"] # On autorise tout pour le dev local

# --- APPLICATION DEFINITION ---
INSTALLED_APPS = [
    # Apps Django par défaut
    'django.contrib.admin',
    'django.contrib.auth',
    'django.contrib.contenttypes',
    'django.contrib.sessions',
    'django.contrib.messages',
    'django.contrib.staticfiles',
    'django_extensions',

    # Apps Tiers
    'rest_framework',
    'rest_framework_simplejwt', 
    'corsheaders',              

    # Apps Locales
    'users',
    'formations',
    'market',
    'business_plan',
    'tools',
    'jobs',
    'contact',
    'appointments',
    'mentoring',
    'payment',
]

MIDDLEWARE = [
    'django.middleware.security.SecurityMiddleware',
    'django.contrib.sessions.middleware.SessionMiddleware',
    'corsheaders.middleware.CorsMiddleware', # Toujours au début
    'django.middleware.common.CommonMiddleware',
    'django.middleware.csrf.CsrfViewMiddleware',
    'django.contrib.auth.middleware.AuthenticationMiddleware',
    'django.contrib.messages.middleware.MessageMiddleware',
    'django.middleware.clickjacking.XFrameOptionsMiddleware',
    'goon_backend.middleware.FrameOptionsMiddleware',  # En DEBUG : autorise iframe depuis le frontend
]

ROOT_URLCONF = 'goon_backend.urls'

# CORRECTION : Une seule définition de TEMPLATES
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 = 'goon_backend.wsgi.application'

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

# --- AUTHENTIFICATION ---
AUTH_USER_MODEL = 'users.User'

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 = 'fr-fr'
TIME_ZONE = 'UTC'
USE_I18N = True
USE_TZ = True

# --- STATIC & MEDIA FILES ---
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 ---
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': 10
}

# URLs frontend et backend (depuis .env : tous les liens du back utilisent ces valeurs)
FRONTEND_URL = os.getenv("FRONTEND_URL", "http://localhost:5173")
API_URL = os.getenv("API_URL", "http://localhost:8000")

# --- CORS (origine autorisée = FRONTEND_URL) ---
_cors_origins = [FRONTEND_URL.rstrip("/")]
if "127.0.0.1" not in FRONTEND_URL:
    _cors_origins.append("http://127.0.0.1:5173")
CORS_ALLOWED_ORIGINS = _cors_origins
CORS_ALLOW_CREDENTIALS = True

# --- PayTech (paiement documents BP / BMC / Pitch) ---
PAYTECH_API_KEY = os.getenv("PAYTECH_API_KEY", "")
PAYTECH_API_SECRET = os.getenv("PAYTECH_API_SECRET", "")
PAYTECH_ENV = os.getenv("PAYTECH_ENV", "test")
PAYTECH_SUCCESS_URL = os.getenv("PAYTECH_SUCCESS_URL", f"{FRONTEND_URL.rstrip('/')}/student/payment/success")
PAYTECH_CANCEL_URL = os.getenv("PAYTECH_CANCEL_URL", f"{FRONTEND_URL.rstrip('/')}/student/payment/cancel")
PAYTECH_IPN_URL = os.getenv("PAYTECH_IPN_URL", f"{API_URL.rstrip('/')}/api/payment/ipn/")

# --- Certificat (depuis .env) ---
SITE_NAME = os.getenv("SITE_NAME", "GOON – Sénégal Academy")
CERTIFICATE_SIGNATORY_LEFT_NAME = os.getenv("CERTIFICATE_SIGNATORY_LEFT_NAME", "GOON Academy")
CERTIFICATE_SIGNATORY_LEFT_TITLE = os.getenv("CERTIFICATE_SIGNATORY_LEFT_TITLE", "Direction pédagogique")
CERTIFICATE_SIGNATORY_RIGHT_NAME = os.getenv("CERTIFICATE_SIGNATORY_RIGHT_NAME", "Sénégal Academy")
CERTIFICATE_SIGNATORY_RIGHT_TITLE = os.getenv("CERTIFICATE_SIGNATORY_RIGHT_TITLE", "Validation des compétences")

# --- JWT ---
SIMPLE_JWT = {
    'ACCESS_TOKEN_LIFETIME': timedelta(minutes=60),
    'REFRESH_TOKEN_LIFETIME': timedelta(days=1),
    'ROTATE_REFRESH_TOKENS': True,
    'BLACKLIST_AFTER_ROTATION': True,
    'AUTH_HEADER_TYPES': ('Bearer',),
}

# --- EMAIL ---
# En prod (cPanel), si SSL échoue (certificat modifié par l'hébergeur), mettre EMAIL_SSL_SKIP_VERIFY=1 dans .env
EMAIL_SSL_SKIP_VERIFY = os.getenv("EMAIL_SSL_SKIP_VERIFY", "").lower() in ("1", "true", "yes")
EMAIL_BACKEND = "goon_backend.smtp_backend.SMTPBackendSkipVerify"
EMAIL_HOST = os.getenv("EMAIL_HOST", "smtp.gmail.com")
EMAIL_PORT = int(os.getenv("EMAIL_PORT", "587"))
EMAIL_USE_TLS = os.getenv("EMAIL_USE_TLS", "true").lower() in ("1", "true", "yes")
EMAIL_HOST_USER = os.getenv("EMAIL_HOST_USER", "signarerestaurant@gmail.com")
EMAIL_HOST_PASSWORD = os.getenv("EMAIL_HOST_PASSWORD", "")
DEFAULT_FROM_EMAIL = os.getenv("DEFAULT_FROM_EMAIL", EMAIL_HOST_USER if EMAIL_HOST_USER else "noreply@example.com")
SERVER_EMAIL = os.getenv("SERVER_EMAIL", DEFAULT_FROM_EMAIL)

# =========================================================
# 🛑 ZONE CRITIQUE : CONFIGURATION IFRAME & MEDIA
# =========================================================

# 1. Autoriser l'affichage dans une iframe (X-Frame-Options)
X_FRAME_OPTIONS = 'ALLOWALL'

# 2. Désactiver la politique COOP qui bloque les iframes cross-origin (Nouveau sur Django 4+)
SECURE_CROSS_ORIGIN_OPENER_POLICY = None

# 3. Headers de sécurité optionnels (si HTTPS)
# SECURE_SSL_REDIRECT = False # False en dev

# --- LOGGING (pour debug Groq / chatbot) ---
LOGGING = {
    "version": 1,
    "disable_existing_loggers": False,
    "handlers": {
        "console": {
            "class": "logging.StreamHandler",
        },
    },
    "root": {
        "handlers": ["console"],
        "level": "INFO",
    },
    "loggers": {
        "formations": {
            "level": "INFO",
            "handlers": ["console"],
            "propagate": False,
        },
    },
}