import os
from pathlib import Path
from datetime import timedelta

BASE_DIR = Path(__file__).resolve().parent.parent.parent
# --- SIGURNOST I OKRUŽENJE (Docker Environment Variables) ---
# Ako varijabla nije definirana u Dockeru, koristi se fallback (razvojni ključ)
SECRET_KEY = os.environ.get('SECRET_KEY', 'django-insecure-fk#ywtdyi8=t6^vdbo!=br8op0rdwf*ks#sji20&mp2+nwjs_5')

# Docker prosljeđuje string 'True' ili 'False'. Pretvaramo ga u Python Boolean.
DEBUG = os.environ.get('DEBUG', 'True') == 'True'

INSTALLED_APPS = [
    'unfold',
    'django.contrib.admin',
    'django.contrib.auth',
    'django.contrib.contenttypes',
    'django.contrib.sessions',
    'django.contrib.messages',
    'django.contrib.staticfiles',
    'corsheaders',
    'rest_framework',
    'django_extensions',
    'rest_framework_simplejwt',
    'modules.invoicing',
    'modules.task_management',
    'core.users.apps.UsersConfig',
    'modules.crm',
    'modules.fleet'
]

UNFOLD = {
    'SITE_TITLE': 'ERP Admin',
    'SITE_HEADER': 'ERP Administration',
    'SITE_SYMBOL': 'dashboard',
    'SHOW_HISTORY': True,
}

MIDDLEWARE = [
    'corsheaders.middleware.CorsMiddleware', # Mora biti prvi
    'django.middleware.security.SecurityMiddleware',
    'whitenoise.middleware.WhiteNoiseMiddleware', # Za statiku
    'django.contrib.sessions.middleware.SessionMiddleware',
    'django.middleware.common.CommonMiddleware',
    'django.middleware.csrf.CsrfViewMiddleware',
    'django.contrib.auth.middleware.AuthenticationMiddleware',
    'django.contrib.messages.middleware.MessageMiddleware',
]

ROOT_URLCONF = 'core.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 = 'core.wsgi.application'

# --- VALIDACIJA LOZINKI ---
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'},
]

AUTH_USER_MODEL = 'users.CustomUser'


# --- INTERNACIONALIZACIJA (Lokalizacija) ---
LANGUAGE_CODE = 'hr'  # Postavljeno na hrvatski jezik za ERP/Zadatke

TIME_ZONE = 'Europe/Zagreb'  # Sinkronizirano s našom vremenskom zonom

USE_I18N = True

USE_TZ = True


CORS_ALLOW_CREDENTIALS = True
# U bazi definiramo default, a u prod/dev override-amo
CORS_ALLOWED_ORIGINS = os.environ.get('CORS_ALLOWED_ORIGINS', 'http://localhost:4321').split(',')

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',
    'access-control-request-private-network',
]

# Dopušta preflight zahtjeve unutar lokalne mreže (npr. s Docker mreže na tvoje računalo)
CORS_ALLOW_PRIVATE_NETWORK = True
CORS_PREFLIGHT_MAX_AGE = 86400
# Dopusti slanje Authorization zaglavlja (JWT Tokena) kroz mrežne zahtjeve
CORS_ALLOW_CREDENTIALS = True


# --- REST FRAMEWORK & JWT POSTAVKE ---
REST_FRAMEWORK = {
    'DEFAULT_AUTHENTICATION_CLASSES': (
        'rest_framework_simplejwt.authentication.JWTAuthentication',
    ),
    'DEFAULT_PERMISSION_CLASSES': (
        'rest_framework.permissions.IsAuthenticated',
        # 'rest_framework.permissions.AllowAny',
    ),
}

SIMPLE_JWT = {
    'ACCESS_TOKEN_LIFETIME': timedelta(days=1),
    'REFRESH_TOKEN_LIFETIME': timedelta(days=7),
    'ROTATE_REFRESH_TOKENS': True,
    'BLACKLIST_AFTER_ROTATION': True,  # Dodano
    'AUTH_HEADER_TYPES': ('Bearer',),
}

WEBHOOK_SECRET = os.environ.get('WEBHOOK_SECRET', 'super-tajni-dugacki-kljuc-koji-ces-promijeniti')

DEFAULT_AUTO_FIELD = 'django.db.models.BigAutoField'

# ==============================================================================
# 🔥 CELERY & REDIS POSTAVKE (Lean Worker Model)
# ==============================================================================

# Čitamo REDIS_URL iz okruženja (Docker prosljeđuje 'redis://redis:6379/0'). 
# Ako pokrećeš izvan Dockera, koristi localhost kao fallback.
REDIS_URL = os.environ.get('REDIS_URL', 'redis://localhost:6379/0')

CELERY_BROKER_URL = REDIS_URL
CELERY_RESULT_BACKEND = REDIS_URL

# Ako želiš koristiti Redis kao brzi cache sustav unutar Djanga (izvrsno za ERP performanse)
# Za ovo ti je potreban paket 'django-redis' u requirements.txt
CACHES = {
    'default': {
        'BACKEND': 'django_redis.cache.RedisCache',
        'LOCATION': REDIS_URL,  # Koristi isti Redis kontejner i bazu /0
        'OPTIONS': {
            'CLIENT_CLASS': 'django_redis.client.DefaultClient',
            'PARSER_KWARGS': {'decode_responses': True},
        }
    }
}

CELERY_ACCEPT_CONTENT = ['json']
CELERY_TASK_SERIALIZER = 'json'

# URL kojim će preglednik dohvaćati statiku
STATIC_URL = '/static/'

# Direktorij gdje će 'collectstatic' skupljati sve statičke datoteke (za produkciju)
# STATIC_ROOT = BASE_DIR / '/app/staticfiles'

# (Opcionalno, ali preporučeno za ERP) Ako koristiš i medije (dokumente)
MEDIA_URL = '/media/'
MEDIA_ROOT = BASE_DIR / 'media'


# ==============================================================================
# 🔥 Paperless postavke
# ==============================================================================


PAPERLESS_BASE_URL = os.environ.get('PAPERLESS_BASE_URL', 'http://paperless:8000') # paperless na drugoj docker compose instanci
PAPERLESS_API_TOKEN = os.environ.get('PAPERLESS_API_TOKEN', '144b62542009c1c1a5a296b16601b4ab488f6a01')

# ==============================================================================
# 🔥 Email postavke (Google)
# ==============================================================================

# SMTP Konfiguracija
EMAIL_BACKEND = 'django.core.mail.backends.smtp.EmailBackend'
EMAIL_HOST = 'smtp.gmail.com'
EMAIL_PORT = 587
EMAIL_USE_TLS = True

# Čitanje iz .env varijabli
EMAIL_HOST_USER = os.environ.get('EMAIL_HOST_USER', 'tvoj.email@gmail.com')
EMAIL_HOST_PASSWORD = os.environ.get('EMAIL_HOST_PASSWORD', 'xxxx-xxxx-xxxx-xxxx')
DEFAULT_FROM_EMAIL = os.environ.get('DEFAULT_FROM_EMAIL', 'tvoj.email@gmail.com')

# ==============================================================================
# 🔥 PUSHER CONFIGURATION
# ==============================================================================

# Pusher Configuration
PUSHER_APP_ID = os.environ.get('PUSHER_APP_ID')
PUSHER_KEY = os.environ.get('PUSHER_KEY')
PUSHER_SECRET = os.environ.get('PUSHER_SECRET')
PUSHER_CLUSTER = os.environ.get('PUSHER_CLUSTER', default='mt1')

# Cache za fallback mehanizam
CACHES = {
    'default': {
        'BACKEND': 'django.core.cache.backends.redis.RedisCache',
        'LOCATION': 'redis://127.0.0.1:6379/1',
    }
}