import os
from pathlib import Path
from datetime import timedelta

BASE_DIR = Path(__file__).resolve().parent.parent

# --- Core ---
SECRET_KEY = os.environ.get('DJANGO_SECRET_KEY', 'dev-insecure-key-change-in-production')
DEBUG = os.environ.get('DJANGO_DEBUG', 'True').lower() in ('true', '1', 'yes')
ALLOWED_HOSTS = os.environ.get('DJANGO_ALLOWED_HOSTS', 'localhost,127.0.0.1,0.0.0.0').split(',')

# --- Apps ---
INSTALLED_APPS = [
    'django.contrib.admin',
    'django.contrib.auth',
    'django.contrib.contenttypes',
    'django.contrib.sessions',
    'django.contrib.messages',
    'django.contrib.staticfiles',
    # Third party
    'rest_framework',
    'corsheaders',
    # Local apps
    'apps.accounts',
    'apps.monitor',
]

MIDDLEWARE = [
    'django.middleware.security.SecurityMiddleware',
    '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 = 'config.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 = 'config.wsgi.application'

# --- Database ---
if os.environ.get('USE_MYSQL', 'false').lower() in ('true', '1', 'yes'):
    DATABASES = {
        'default': {
            'ENGINE': 'django.db.backends.mysql',
            'NAME': os.environ.get('DB_NAME', 'airgate'),
            'USER': os.environ.get('DB_USER', 'airgate'),
            'PASSWORD': os.environ.get('DB_PASSWORD', ''),
            'HOST': os.environ.get('DB_HOST', 'localhost'),
            'PORT': os.environ.get('DB_PORT', '3306'),
            'OPTIONS': {
                'charset': 'utf8mb4',
                'init_command': "SET sql_mode='STRICT_TRANS_TABLES'",
            },
        }
    }
else:
    DATABASES = {
        'default': {
            'ENGINE': 'django.db.backends.sqlite3',
            'NAME': BASE_DIR / 'db.sqlite3',
        }
    }

# --- Auth ---
AUTH_USER_MODEL = 'accounts.AdminUser'

AUTH_PASSWORD_VALIDATORS = [
    {'NAME': 'django.contrib.auth.password_validation.MinimumLengthValidator'},
]

# --- JWT ---
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': '30/minute',
        'user': '120/minute',
    },
}

SIMPLE_JWT = {
    'ACCESS_TOKEN_LIFETIME': timedelta(hours=2),
    'REFRESH_TOKEN_LIFETIME': timedelta(days=7),
    'AUTH_HEADER_TYPES': ('Bearer',),
}

# --- CORS ---
CORS_ALLOWED_ORIGINS = os.environ.get(
    'CORS_ALLOWED_ORIGINS',
    'http://localhost:5173,http://localhost:3000,http://127.0.0.1:5173'
).split(',')
CORS_ALLOW_CREDENTIALS = True

# --- i18n ---
LANGUAGE_CODE = 'zh-hans'
TIME_ZONE = 'Asia/Shanghai'
USE_I18N = True
USE_TZ = True

# --- Static ---
STATIC_URL = 'static/'
STATIC_ROOT = BASE_DIR / 'staticfiles'

DEFAULT_AUTO_FIELD = 'django.db.models.BigAutoField'

# --- Volcengine ---
VOLC_ACCESS_KEY = os.environ.get('VOLC_ACCESS_KEY', '')
VOLC_SECRET_KEY = os.environ.get('VOLC_SECRET_KEY', '')

# --- Encryption ---
AIRGATE_ENCRYPTION_KEY = os.environ.get('AIRGATE_ENCRYPTION_KEY', '')

# --- Feishu ---
FEISHU_WEBHOOK_URL = os.environ.get('FEISHU_WEBHOOK_URL', '')

# --- API Key (for external systems like AirDrama) ---
AIRGATE_API_KEY = os.environ.get('AIRGATE_API_KEY', '')

# --- Monitor ---
MONITOR_INTERVAL = int(os.environ.get('MONITOR_INTERVAL', '3600'))