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

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

SECRET_KEY = 'django-insecure-!-mtect5n-yyxkp2m=j(8dz_yi$b3w3ddo&w#i(@4kv-spdthy'

DEBUG = True

ALLOWED_HOSTS = [
    "127.0.0.1",
    "localhost",
    "192.168.2.76",
    "8.160.178.88"
]


INSTALLED_APPS = [
    'django.contrib.admin',
    'django.contrib.auth',
    'django.contrib.contenttypes',
    'django.contrib.sessions',
    'django.contrib.messages',
    'django.contrib.staticfiles',

    # Third-party apps
    'rest_framework',
    'rest_framework_simplejwt',
    'django_filters',
    'drf_spectacular',

    # Local apps
    'apps.common',
    'apps.user',
    'apps.case',
    'apps.training',
]

MIDDLEWARE = [
    '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',
    'config.middleware.APIAccessLogMiddleware',
]

ROOT_URLCONF = 'config.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 = 'config.wsgi.application'


# Database - MySQL
DATABASES = {
    'default': {
        'ENGINE': 'django.db.backends.mysql',
        'NAME': os.getenv('DB_NAME', 'medical_training'),
        'USER': os.getenv('DB_USER', 'root'),
        'PASSWORD': os.getenv('DB_PASSWORD', ''),
        'HOST': os.getenv('DB_HOST', 'localhost'),
        'PORT': os.getenv('DB_PORT', '3306'),
        'OPTIONS': {
            'charset': 'utf8mb4',
            'init_command': "SET sql_mode='STRICT_TRANS_TABLES'",
        },
        'TEST': {
            'NAME': 'test_medical_training',
            'CHARSET': 'utf8mb4',
            'COLLATION': 'utf8mb4_unicode_ci',
        },
    }
}


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

STATIC_URL = 'static/'

DEFAULT_AUTO_FIELD = 'django.db.models.BigAutoField'

# ─── REST Framework ───────────────────────────────────────────────────────────

REST_FRAMEWORK = {
    'EXCEPTION_HANDLER': 'config.exceptions.custom_exception_handler',
    'DEFAULT_SCHEMA_CLASS': 'drf_spectacular.openapi.AutoSchema',
    'DEFAULT_AUTHENTICATION_CLASSES': [
        'apps.user.authentication.RedisBlacklistJWTAuthentication',
        'rest_framework.authentication.SessionAuthentication',
    ],
    'DEFAULT_PERMISSION_CLASSES': [
        'rest_framework.permissions.IsAuthenticated',
    ],
    'DEFAULT_PAGINATION_CLASS': 'rest_framework.pagination.PageNumberPagination',
    'PAGE_SIZE': 20,
    'DEFAULT_THROTTLE_CLASSES': [],
    'DEFAULT_THROTTLE_RATES': {
        'sms_phone_minute': '1/minute',
        'sms_phone_day': '10/day',
        'sms_ip': '30/hour',
        'register_ip': '10/hour',
        'reset_phone': '5/hour',
        'pdf_parse_user': '20/hour',
        'scoring_rule_generate_user': '20/hour',
    },
}

# ─── JWT ──────────────────────────────────────────────────────────────────────

SIMPLE_JWT = {
    'ACCESS_TOKEN_LIFETIME': timedelta(hours=2),
    'REFRESH_TOKEN_LIFETIME': timedelta(days=7),
    'ROTATE_REFRESH_TOKENS': True,
    'BLACKLIST_AFTER_ROTATION': False,
    'ALGORITHM': 'HS256',
    'SIGNING_KEY': SECRET_KEY,
    'AUTH_HEADER_TYPES': ('Bearer',),
    'AUTH_HEADER_NAME': 'HTTP_AUTHORIZATION',
}

# ─── Redis Cache ──────────────────────────────────────────────────────────────

CACHES = {
    'default': {
        'BACKEND': 'django_redis.cache.RedisCache',
        'LOCATION': os.getenv('REDIS_URL', 'redis://127.0.0.1:6379/1'),
        'OPTIONS': {
            'CLIENT_CLASS': 'django_redis.client.DefaultClient',
        },
    }
}

# ─── SMS ──────────────────────────────────────────────────────────────────────

SMS_CODE_EXPIRE = 300     # 验证码有效期（秒）
SMS_CODE_INTERVAL = 60    # 发送间隔（秒）
SMS_PROVIDER = os.getenv('SMS_PROVIDER', 'mock')
SMS_MOCK_CODE = os.getenv('SMS_MOCK_CODE', '123456')  # mock 模式下固定验证码

ALIYUN_SMS_ACCESS_KEY_ID = os.getenv('ALIYUN_SMS_ACCESS_KEY_ID', '')
ALIYUN_SMS_ACCESS_KEY_SECRET = os.getenv('ALIYUN_SMS_ACCESS_KEY_SECRET', '')
ALIYUN_SMS_SIGN_NAME = os.getenv('ALIYUN_SMS_SIGN_NAME', '医疗训练平台')
ALIYUN_SMS_TEMPLATE_REGISTER = os.getenv('ALIYUN_SMS_TEMPLATE_REGISTER', '')
ALIYUN_SMS_TEMPLATE_LOGIN = os.getenv('ALIYUN_SMS_TEMPLATE_LOGIN', '')
ALIYUN_SMS_TEMPLATE_RESET = os.getenv('ALIYUN_SMS_TEMPLATE_RESET', '')

# ─── DeepSeek ─────────────────────────────────────────────────────────────────

DEEPSEEK_API_KEY = os.getenv('DEEPSEEK_API_KEY', '')
DEEPSEEK_BASE_URL = os.getenv('DEEPSEEK_BASE_URL', 'https://api.deepseek.com')
DEEPSEEK_MODEL = os.getenv('DEEPSEEK_MODEL', 'deepseek-chat')
DEEPSEEK_TIMEOUT_SECONDS = int(os.getenv('DEEPSEEK_TIMEOUT_SECONDS', '120'))
DEEPSEEK_MAX_RETRIES = int(os.getenv('DEEPSEEK_MAX_RETRIES', '1'))

# ─── Spectacular (Swagger / OpenAPI) ─────────────────────────────────────────

SPECTACULAR_SETTINGS = {
    'TITLE': 'Medical Training API',
    'DESCRIPTION': '医疗训练系统 API 文档',
    'VERSION': '1.0.0',
    'SERVE_INCLUDE_SCHEMA': False,
    'COMPONENT_SPLIT_REQUEST': True,
    # 修复同名枚举冲突（User.STATUS_CHOICES 与 CaseBase.STATUS_CHOICES 值相同，共用一个名称）
    'ENUM_NAME_OVERRIDES': {
        'CaseTypeEnum': 'apps.case.models.CaseBase.CASE_TYPE_CHOICES',
        'CreatableCaseTypeEnum': [('traditional', 'traditional'), ('teaching', 'teaching')],
        'CommonStatusEnum': 'apps.case.models.CaseBase.STATUS_CHOICES',
        'PublishStatusEnum': 'apps.case.models.CaseBase.PUBLISH_STATUS_CHOICES',
        'TrainingStatusEnum': 'apps.training.models.TrainingRecord.STATUS_CHOICES',
        'TeacherStudentStatusEnum': 'apps.user.models.TeacherStudentRelation.STATUS_CHOICES',
    },
}

# ─── Auth ─────────────────────────────────────────────────────────────────────

AUTH_USER_MODEL = 'user.User'

# ─── Logging ──────────────────────────────────────────────────────────────────

LOGS_DIR = BASE_DIR / 'logs'
LOGS_DIR.mkdir(exist_ok=True)

LOGGING = {
    'version': 1,
    'disable_existing_loggers': False,
    'formatters': {
        'verbose': {
            'format': '{asctime} {levelname} [{name}] {message}',
            'style': '{',
        },
    },
    'handlers': {
        'console': {
            'class': 'logging.StreamHandler',
            'formatter': 'verbose',
        },
        'audit_file': {
            'class': 'config.logging_handlers.DailyFileHandler',
            'dir_path': str(LOGS_DIR),
            'prefix': 'audit',
            'backup_count': 30,
            'formatter': 'verbose',
        },
        'api_access_file': {
            'class': 'config.logging_handlers.DailyFileHandler',
            'dir_path': str(LOGS_DIR),
            'prefix': 'api-access',
            'backup_count': 30,
            'formatter': 'verbose',
        },
    },
    'loggers': {
        'audit': {
            'handlers': ['audit_file', 'console'],
            'level': 'INFO',
            'propagate': False,
        },
        'api_access': {
            'handlers': ['api_access_file'],
            'level': 'INFO',
            'propagate': False,
        },
    },
    'root': {
        'handlers': ['console'],
        'level': 'INFO',
    },
}