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

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

SECRET_KEY = os.environ['SECRET_KEY']

DEBUG = os.environ.get('DEBUG', 'False') == 'True'

TURNSTILE_SECRET_KEY = os.environ.get('TURNSTILE_SECRET_KEY', '')

ALLOWED_HOSTS = os.environ.get('ALLOWED_HOSTS', 'localhost,127.0.0.1').split(',')

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',
    'rest_framework_simplejwt.token_blacklist',
    'corsheaders',
    'finance',
]

MIDDLEWARE = [
    'corsheaders.middleware.CorsMiddleware',
    'django.middleware.security.SecurityMiddleware',
    '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',
]

CORS_ALLOWED_ORIGINS = os.environ.get(
    'CORS_ALLOWED_ORIGINS', 'http://localhost:4200'
).split(',')

ROOT_URLCONF = 'core.urls'

TEMPLATES = [
    {
        'BACKEND': 'django.template.backends.django.DjangoTemplates',
        'DIRS': [BASE_DIR / 'templates'],
        '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 = 'core.wsgi.application'

DATABASES = {
    'default': {
        'ENGINE': 'django.db.backends.postgresql',
        'NAME': os.environ.get('DB_NAME', 'budget_db'),
        'USER': os.environ.get('DB_USER', 'budget_user'),
        'PASSWORD': os.environ['DB_PASSWORD'],
        'HOST': os.environ.get('DB_HOST', 'localhost'),
        'PORT': os.environ.get('DB_PORT', '5432'),
    }
}

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'},
]

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

STATIC_URL = 'static/'
STATIC_ROOT = BASE_DIR / 'staticfiles'
MEDIA_URL = '/media/'
MEDIA_ROOT = BASE_DIR / 'media'

DEFAULT_AUTO_FIELD = 'django.db.models.BigAutoField'

# ── Email ─────────────────────────────────────────────────────────────────────
_default_email_backend = (
    'django.core.mail.backends.console.EmailBackend' if DEBUG
    else 'django.core.mail.backends.smtp.EmailBackend'
)
EMAIL_BACKEND = os.environ.get('EMAIL_BACKEND', _default_email_backend)
EMAIL_HOST          = os.environ.get('EMAIL_HOST', 'localhost')
EMAIL_PORT          = int(os.environ.get('EMAIL_PORT', '587'))
EMAIL_HOST_USER     = os.environ.get('EMAIL_HOST_USER', '')
EMAIL_HOST_PASSWORD = os.environ.get('EMAIL_HOST_PASSWORD', '')
EMAIL_USE_TLS       = os.environ.get('EMAIL_USE_TLS', 'True') == 'True'
DEFAULT_FROM_EMAIL  = os.environ.get('DEFAULT_FROM_EMAIL', 'noreply@armarium.ch')
FRONTEND_URL        = os.environ.get('FRONTEND_URL', 'http://localhost:4200')

LOGGING = {
    'version': 1,
    'disable_existing_loggers': False,
    'handlers': {
        'console': {'class': 'logging.StreamHandler'},
    },
    'loggers': {
        'django.mail': {'handlers': ['console'], 'level': 'ERROR'},
        'armarium':    {'handlers': ['console'], 'level': 'INFO'},
    },
}

REST_FRAMEWORK = {
    'DEFAULT_AUTHENTICATION_CLASSES': (
        'rest_framework_simplejwt.authentication.JWTAuthentication',
    ),
    'DEFAULT_PERMISSION_CLASSES': (
        'rest_framework.permissions.IsAuthenticated',
    ),
    'DEFAULT_THROTTLE_CLASSES': [
        'rest_framework.throttling.AnonRateThrottle',
        'rest_framework.throttling.UserRateThrottle',
    ],
    'DEFAULT_THROTTLE_RATES': {
        'anon': '20/min',
        'user': '200/min',
        'auth': '5/min',
    },
}

AUTHENTICATION_BACKENDS = [
    'finance.backends.EmailAuthBackend',
]

SIMPLE_JWT = {
    'ACCESS_TOKEN_LIFETIME': timedelta(minutes=60),
    'REFRESH_TOKEN_LIFETIME': timedelta(days=7),
    'ROTATE_REFRESH_TOKENS': True,
    'BLACKLIST_AFTER_ROTATION': True,
}

# ── Uploads ───────────────────────────────────────────────────────────────────
DATA_UPLOAD_MAX_MEMORY_SIZE = 5 * 1024 * 1024   # 5 MB
FILE_UPLOAD_MAX_MEMORY_SIZE = 5 * 1024 * 1024   # 5 MB

# ── CSRF ──────────────────────────────────────────────────────────────────────
CSRF_TRUSTED_ORIGINS = os.environ.get(
    'CSRF_TRUSTED_ORIGINS', 'http://localhost:4200'
).split(',')

# ── Production security (nur aktiv wenn DEBUG=False) ─────────────────────────
if not DEBUG:
    SECURE_SSL_REDIRECT             = True
    SECURE_PROXY_SSL_HEADER         = ('HTTP_X_FORWARDED_PROTO', 'https')
    SECURE_HSTS_SECONDS             = 31_536_000  # 1 Jahr
    SECURE_HSTS_INCLUDE_SUBDOMAINS  = True
    SECURE_HSTS_PRELOAD             = True
    SESSION_COOKIE_SECURE           = True
    CSRF_COOKIE_SECURE              = True
    SECURE_CONTENT_TYPE_NOSNIFF     = True

FRONTEND_URL = os.environ.get('FRONTEND_URL', 'http://localhost:4200')