"""
Django settings for nhn_prj project.
"""

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

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

load_dotenv(dotenv_path=os.path.join(BASE_DIR, ".env.dev"))

# SECURITY WARNING: keep the secret key used in production secret!
SECRET_KEY = os.environ.get(
    "SECRET_KEY", "django-insecure-default-key-change-in-production"
)

# SECURITY WARNING: don't run with debug turned on in production!
DEBUG = int(os.environ.get("DEBUG", default=1))

ALLOWED_HOSTS = ["*"]

# 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",
    "drf_yasg",
    "corsheaders",
    "nhn",
]

MIDDLEWARE = [
    "nhn_prj.middleware.RequestLoggingMiddleware",  # 요청 로깅 (맨 위)
    "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",
]

ROOT_URLCONF = "nhn_prj.urls"

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

# Database
if os.environ.get("SQL_ENGINE"):
    DATABASES = {
        "default": {
            "ENGINE": os.environ.get("SQL_ENGINE", "django.db.backends.sqlite3"),
            "NAME": os.environ.get("SQL_DATABASE", BASE_DIR / "db.sqlite3"),
            "USER": os.environ.get("SQL_USER", "user"),
            "PASSWORD": os.environ.get("SQL_PASSWORD", "password"),
            "HOST": os.environ.get("SQL_HOST", "localhost"),
            "PORT": os.environ.get("SQL_PORT", "3306"),
        }
    }
else:
    DATABASES = {
        "default": {
            "ENGINE": "django.db.backends.sqlite3",
            "NAME": BASE_DIR / "db.sqlite3",
        }
    }

# 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 = "ko-kr"
TIME_ZONE = "Asia/Seoul"
USE_I18N = True
USE_TZ = True

# Static files (CSS, JavaScript, Images)
STATIC_URL = "static/"

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

# CORS settings
CORS_ALLOWED_ORIGINS = [
    "http://localhost:3000",
    "http://127.0.0.1:3000",
    "http://192.168.0.100:3000",
    "https://demo.test",
    "http://demo.test",
    "https://www.demo.test",
    "https://sample.test",
    "http://sample.test",
    "https://www.sample.test",
    "http://www.sample.test",
    "https://auth.sample.test",
    "http://auth.sample.test",
    "https://blog.sample.test",
    "http://blog.sample.test",
    "https://www.icurfer.com",
    "https://icurfer.com",
]
# 개발 환경에서 모든 origin 허용 (필요시)
CORS_ALLOW_ALL_ORIGINS = bool(DEBUG)

CORS_ALLOW_CREDENTIALS = True

# 커스텀 헤더 허용 (X-NHN-Token, X-NHN-Region 등)
CORS_ALLOW_HEADERS = [
    "accept",
    "accept-encoding",
    "authorization",
    "content-type",
    "dnt",
    "origin",
    "user-agent",
    "x-csrftoken",
    "x-requested-with",
    # NHN Cloud 커스텀 헤더
    "x-nhn-token",
    "x-nhn-region",
    "x-nhn-tenant-id",
    "x-nhn-storage-account",
    "x-nhn-appkey",
]

# REST Framework settings
REST_FRAMEWORK = {
    "DEFAULT_AUTHENTICATION_CLASSES": [
        "nhn.authentication.StatelessJWTAuthentication",
    ],
    "DEFAULT_PERMISSION_CLASSES": [
        "rest_framework.permissions.AllowAny",
    ],
}

# JWT settings
ISTIO_JWT = int(os.environ.get("ISTIO_JWT", default=0))

if ISTIO_JWT:
    # RS256 for Istio
    SIMPLE_JWT = {
        "ACCESS_TOKEN_LIFETIME": timedelta(minutes=30),
        "REFRESH_TOKEN_LIFETIME": timedelta(days=1),
        "ALGORITHM": "RS256",
        "SIGNING_KEY": open(os.path.join(BASE_DIR, "keys/private.pem")).read(),
        "VERIFYING_KEY": open(os.path.join(BASE_DIR, "keys/public.pem")).read(),
        "AUTH_HEADER_TYPES": ("Bearer",),
        "USER_ID_FIELD": "name",
        "USER_ID_CLAIM": "name",
    }
else:
    # HS256 default
    SIMPLE_JWT = {
        "ACCESS_TOKEN_LIFETIME": timedelta(minutes=30),
        "REFRESH_TOKEN_LIFETIME": timedelta(days=1),
        "ALGORITHM": "HS256",
        "SIGNING_KEY": SECRET_KEY,
        "AUTH_HEADER_TYPES": ("Bearer",),
        "USER_ID_FIELD": "name",
        "USER_ID_CLAIM": "name",
    }

# Auth server URL
AUTH_VERIFY_URL = os.environ.get("AUTH_VERIFY_URL", "")

# Logging
LOGGING = {
    "version": 1,
    "disable_existing_loggers": False,
    "formatters": {
        "verbose": {
            "format": "[{asctime}] {levelname} {name} {message}",
            "style": "{",
        },
    },
    "handlers": {
        "console": {
            "class": "logging.StreamHandler",
            "formatter": "verbose",
            "stream": sys.stdout,
        },
    },
    "root": {
        "handlers": ["console"],
        "level": "INFO",
    },
    "loggers": {
        "django": {
            "handlers": ["console"],
            "level": "INFO",
            "propagate": False,
        },
        "django.request": {
            "handlers": ["console"],
            "level": "INFO",  # ERROR -> INFO로 변경하여 모든 요청 로깅
            "propagate": False,
        },
        # NHN 앱 로거 명시적 설정
        "nhn": {
            "handlers": ["console"],
            "level": "INFO",
            "propagate": False,
        },
        "nhn.packages": {
            "handlers": ["console"],
            "level": "INFO",
            "propagate": False,
        },
        # 요청 로깅 미들웨어
        "nhn_prj.middleware": {
            "handlers": ["console"],
            "level": "INFO",
            "propagate": False,
        },
    },
}