"""
Django settings for flower project.

Generated by 'django-admin startproject' using Django 5.2.7.

For more information on this file, see
https://docs.djangoproject.com/en/5.2/topics/settings/

For the full list of settings and their values, see
https://docs.djangoproject.com/en/5.2/ref/settings/
"""

# 兼容旧版 django-qiniu-storage
try:
    from django.utils.encoding import force_text
except ImportError:
    from django.utils.encoding import force_str as force_text
    import django.utils.encoding
    django.utils.encoding.force_text = force_text

from datetime import timedelta
from pathlib import Path
from environ import Env

# 应用七牛云 SDK 补丁（必须在导入其他模块之前）
from flower.qiniu_patch import apply_all_patches
apply_all_patches()

env = Env(
    DEBUG=(bool, False),
)


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

# Initialize environment variables
Env.read_env(str(BASE_DIR / '.env'))

# 允许一次请求携带更多表单字段，避免 admin 批量操作时报 TooManyFieldsSent
# Django 默认 DATA_UPLOAD_MAX_NUMBER_FIELDS=1000，当一次 POST/GET 的字段（含重复 key）过多会直接抛异常。
DATA_UPLOAD_MAX_NUMBER_FIELDS = env.int('DATA_UPLOAD_MAX_NUMBER_FIELDS', default=20000)

# Quick-start development settings - unsuitable for production
# See https://docs.djangoproject.com/en/5.2/howto/deployment/checklist/

# SECURITY WARNING: keep the secret key used in production secret!
SECRET_KEY = env('SECRET_KEY', default='weak_secret_key_for_dev_only')

# SECURITY WARNING: don't run with debug turned on in production!
DEBUG = env('DEBUG', default=False)

ALLOWED_HOSTS = env.list('ALLOWED_HOSTS', default=[
    'yuwenerp.yuwen.cloud',
])
CSRF_TRUSTED_ORIGINS = env.list('CSRF_TRUSTED_ORIGINS', default=[
    'https://yuwenerp.yuwen.cloud',
])

# 明道云同步配置
MDY_MERCHANT_ID = env.int('MDY_MERCHANT_ID', default=1)
MDY_PRODUCT_CATEGORY_ID = env.int('MDY_PRODUCT_CATEGORY_ID', default=1)
MDY_SYNC_PAGE_SIZE = env.int('MDY_SYNC_PAGE_SIZE', default=100)
MDY_SYNC_MAX_PAGES = env.int('MDY_SYNC_MAX_PAGES', default=2)
MDY_SYNC_MAX_RECORDS = env.int('MDY_SYNC_MAX_RECORDS', default=200)


# CORS 配置
CORS_ALLOW_ALL_ORIGINS = DEBUG  # 开发环境允许所有源，生产环境需要配置白名单
CORS_ALLOWED_ORIGINS = env.list('CORS_ALLOWED_ORIGINS', default=[
    'http://localhost:8000',
    'http://127.0.0.1:5173',
    'http://127.0.0.1:5174',
    'http://127.0.0.1:5179',
    'https://yuwenerp.yuwen.cloud',
])
CORS_ALLOW_CREDENTIALS = True  # 允许携带凭证（如 Cookie、认证头）

# SSE 需要的特殊 CORS 配置
CORS_ALLOW_HEADERS = [
    'accept',
    'accept-encoding',
    'authorization',
    'content-type',
    'dnt',
    'origin',
    'user-agent',
    'x-csrftoken',
    'x-requested-with',
    'cache-control',  # SSE 需要
    'x-accel-buffering',  # SSE 需要
    'last-event-id',  # SSE 重连需要
    # 注意：不要添加 'connection'，这是 hop-by-hop 头部，会被代理过滤
]

# SSE 需要暴露的响应头
CORS_EXPOSE_HEADERS = [
    'content-type',
    'cache-control',
    'x-accel-buffering',
]

# 预检请求缓存时间（秒）
CORS_PREFLIGHT_MAX_AGE = 86400  # 24小时


# Application definition

INSTALLED_APPS = [
    'simpleui',
    'django.contrib.admin',
    'django.contrib.auth',
    'django.contrib.contenttypes',
    'django.contrib.sessions',
    'django.contrib.messages',
    'django.contrib.staticfiles',  # 使用七牛云存储，不需要staticfiles app
    'corsheaders',  # CORS 支持
    'rest_framework',
    'drf_spectacular',
    'basic_info',
    'business',
    'stock',
    'api_v1',
    'api_man',
    'printing',
    'stateflow',
    'sse',
    'api_v2',
]

MIDDLEWARE = [
    'django.middleware.security.SecurityMiddleware',
    'django.contrib.sessions.middleware.SessionMiddleware',
    'corsheaders.middleware.CorsMiddleware',  # CORS 中间件，必须放在 CommonMiddleware 之前
    'django.middleware.common.CommonMiddleware',
    'django.middleware.csrf.CsrfViewMiddleware',
    'django.contrib.auth.middleware.AuthenticationMiddleware',
    'django.contrib.messages.middleware.MessageMiddleware',
    'django.middleware.clickjacking.XFrameOptionsMiddleware',
    'flower.middleware.ApiAuditLogMiddleware',  # API审计日志中间件，需在AuthenticationMiddleware之后
]

REST_FRAMEWORK = {
    'DEFAULT_AUTHENTICATION_CLASSES': (
        'rest_framework_simplejwt.authentication.JWTAuthentication',
    ),
    'DEFAULT_PERMISSION_CLASSES': [
        'rest_framework.permissions.IsAuthenticated',
    ],
    'DEFAULT_SCHEMA_CLASS': 'drf_spectacular.openapi.AutoSchema',
}

# JWT 配置
SIMPLE_JWT = {
    'ACCESS_TOKEN_LIFETIME': timedelta(days=7),
    'REFRESH_TOKEN_LIFETIME': timedelta(days=7),
    'ROTATE_REFRESH_TOKENS': True,
    'UPDATE_LAST_LOGIN': True,
}

SPECTACULAR_SETTINGS = {
    'TITLE': 'Flower API',
    'DESCRIPTION': 'API documentation for the Flower project',
    'VERSION': '1.0.0',
    'SERVE_INCLUDE_SCHEMA': False,
}

ROOT_URLCONF = 'flower.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 = 'flower.wsgi.application'


# Database
# https://docs.djangoproject.com/en/5.2/ref/settings/#databases

DATABASES = {
    'default': {
        'ENGINE': 'django.db.backends.postgresql',
        'NAME': env('DB_NAME'),
        'USER': env('DB_USER'),
        'PASSWORD': env('DB_PASSWORD'),
        'HOST': env('DB_HOST', default='localhost'),
        'PORT': env('DB_PORT', default='6432'),
        'CONN_HEALTH_CHECK': True,
        'CONN_MAX_AGE': env.int('CONN_MAX_AGE', default=0),
    }
}


# Cache configuration
# https://docs.djangoproject.com/en/5.2/topics/cache/
# Django 5.x 内置 Redis 缓存后端，使用 redis 包（已安装）
# Redis 连接配置：优先使用 CACHE_URL，否则从 CACHE_HOST/CACHE_PORT/CACHE_DB 构建
# 默认 localhost:6379（适合宿主机运行），Docker Compose 可通过环境变量指定 CACHE_HOST=redis

# 检测是否在测试环境中
import sys
TESTING = 'test' in sys.argv

if TESTING:
    # 测试环境使用内存缓存，避免 Redis 连接问题
    CACHES = {
        'default': {
            'BACKEND': 'django.core.cache.backends.locmem.LocMemCache',
            'LOCATION': 'unique-testing-cache',
        }
    }
else:
    # 生产/开发环境使用 Redis
    # 优先使用 CACHE_URL（完整 URL），否则从 host/port/db 构建
    cache_url = env('CACHE_URL', default=None)
    if cache_url is None:
        cache_host = env('CACHE_HOST', default='localhost')
        cache_port = env.int('CACHE_PORT', default=6379)
        cache_db = env.int('CACHE_DB', default=0)
        cache_url = f'redis://{cache_host}:{cache_port}/{cache_db}'
    
    CACHES = {
        'default': {
            'BACKEND': 'django.core.cache.backends.redis.RedisCache',
            'LOCATION': cache_url,
            'OPTIONS': {
                # Redis 连接选项
                'socket_connect_timeout': 5,  # 连接超时（秒）
                'socket_timeout': 5,  # 操作超时（秒）
                'retry_on_timeout': True,  # 超时后重试
                'health_check_interval': 30,  # 健康检查间隔（秒）
            },
            # 键前缀，避免不同项目/环境之间的键冲突
            'KEY_PREFIX': env('CACHE_KEY_PREFIX', default='flower'),
            # 默认过期时间（秒），None 表示永不过期（由具体使用场景决定）
            'TIMEOUT': env.int('CACHE_DEFAULT_TIMEOUT', default=300),  # 默认 5 分钟
        }
    }


# Logging configuration
# 目标：
# - 生产环境出现 500 时，能在 stdout 日志里看到完整 traceback
# - 所有日志都带时间戳（含毫秒），便于快速定位与检索
LOG_LEVEL = env('LOG_LEVEL', default='INFO').upper()
DJANGO_LOG_LEVEL = env('DJANGO_LOG_LEVEL', default=LOG_LEVEL).upper()
UVICORN_LOG_LEVEL = env('UVICORN_LOG_LEVEL', default=LOG_LEVEL).upper()
UVICORN_ACCESS_LOG_LEVEL = env('UVICORN_ACCESS_LOG_LEVEL', default='INFO').upper()

LOGGING = {
    'version': 1,
    'disable_existing_loggers': False,
    'formatters': {
        'default': {
            # 注意：Python logging 的 datefmt 基于 time.strftime，不支持 %f；
            # 这里用 %(msecs)03d 输出毫秒。
            'format': '%(asctime)s.%(msecs)03d [%(levelname)s] %(name)s: %(message)s',
            'datefmt': '%Y-%m-%d %H:%M:%S',
        },
    },
    'handlers': {
        'console': {
            'class': 'logging.StreamHandler',
            'formatter': 'default',
        },
    },
    'root': {
        'handlers': ['console'],
        'level': LOG_LEVEL,
    },
    'loggers': {
        # Django 在发生未捕获异常（500）时，会通过 django.request 输出错误日志，
        # record.exc_info 会携带 traceback，Formatter 会自动把 traceback 打到日志中。
        'django.request': {
            'handlers': ['console'],
            'level': 'ERROR',
            'propagate': False,
        },
        'django': {
            'handlers': ['console'],
            'level': DJANGO_LOG_LEVEL,
            'propagate': False,
        },
        # Uvicorn 日志（access/error）统一走我们的 console formatter，确保有时间戳
        'uvicorn': {
            'handlers': ['console'],
            'level': UVICORN_LOG_LEVEL,
            'propagate': False,
        },
        'uvicorn.error': {
            'handlers': ['console'],
            'level': UVICORN_LOG_LEVEL,
            'propagate': False,
        },
        'uvicorn.access': {
            'handlers': ['console'],
            'level': UVICORN_ACCESS_LOG_LEVEL,
            'propagate': False,
        },
    },
}


# Password validation
# https://docs.djangoproject.com/en/5.2/ref/settings/#auth-password-validators

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
# https://docs.djangoproject.com/en/5.2/topics/i18n/

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


# Static files (CSS, JavaScript, Images)
# https://docs.djangoproject.com/en/5.2/howto/static-files/

# 七牛云存储配置
QINIU_ACCESS_KEY = 'IySZff0zEN7jHeDuxj5PrQNMv0qjKoVqBRCuFMzi'
QINIU_SECRET_KEY = 'Mph5XkjUQO3VHFPT1JulYHY442uMOya2bXjbSZp8'
QINIU_BUCKET_NAME = 'yunwenerp'
QINIU_BUCKET_DOMAIN = 'image.yuwen.cloud'
QINIU_SECURE_URL = True

STORAGES = {
    'default': {
        'BACKEND': 'qiniustorage.backends.QiniuStorage',
    },
    'staticfiles': {
        'BACKEND': 'qiniustorage.backends.QiniuStorage',
    },
}

DEFAULT_FILE_STORAGE = 'qiniustorage.backends.QiniuStorage'
STATICFILES_STORAGE = 'qiniustorage.backends.QiniuStorage'

# 静态文件URL（直接从七牛云访问）
STATIC_URL = f'http://{QINIU_BUCKET_DOMAIN}/static/'
STATIC_ROOT = 'static'

MEDIA_URL = f'http://{QINIU_BUCKET_DOMAIN}/media/'

# Default primary key field type
# https://docs.djangoproject.com/en/5.2/ref/settings/#default-auto-field

DEFAULT_AUTO_FIELD = 'django.db.models.BigAutoField'

# Stateflow 配置
# ------------------------------------------------------------------------------
# STATEFLOW_CURRENT_STATE_MODE: 控制 current_state 的语义
# 
# 可选值:
#   'NEXT' (默认): current_state 返回"下一个待执行的节点"
#                  - 配合 progress 判断："节点名" / "已完成"
#                  - 适合显示"接下来要做什么"
#                  - 原有默认行为
#
#   'LAST':        current_state 返回"最后完成的节点"
#                  - 显示"刚做完了什么"
#                  - 适合审计和历史查看
#                  - 新增行为模式
#
# 注意:
# - 修改此配置会影响 status 属性的显示内容
# - API 接口保持兼容，但返回的 status 和 status_id 语义会变化
# - 推荐在新代码中直接使用 get_last_completed_state() 或 get_next_pending_state() 
#   以避免歧义
# - 已废除"未开始"的显示，直接显示第一个节点名称
# ------------------------------------------------------------------------------
STATEFLOW_CURRENT_STATE_MODE = 'NEXT'
# STATEFLOW_CURRENT_STATE_MODE = 'LAST'

# Printing module settings
PRINTING_DEFAULT_PROCESS_ID = 1  # 默认印染流程ID
PLATE_ORDER_DEFAULT_PROCESS_ID = 2  # 默认开版流程ID

# API 审计日志配置
# ------------------------------------------------------------------------------
# 用于记录特定模块POST请求的历史现场，便于追踪"创建"操作。
# 通过Celery异步写入，不影响API响应性能。
# ------------------------------------------------------------------------------
API_AUDIT_LOG_ENABLED = True
API_AUDIT_LOG_URL_PREFIXES = [
    '/api/v1/printing',
    '/api/v1/plate',
]

# Celery 配置
# RabbitMQ Broker 配置：优先使用 CELERY_BROKER_URL，否则从各组件构建
# 默认 localhost（适合宿主机运行），Docker Compose 可通过环境变量指定 CELERY_BROKER_HOST=rabbitmq
celery_broker_url = env('CELERY_BROKER_URL', default=None)
if celery_broker_url is None:
    celery_broker_host = env('CELERY_BROKER_HOST', default='localhost')
    celery_broker_port = env.int('CELERY_BROKER_PORT', default=5672)
    celery_broker_user = env('CELERY_BROKER_USER', default='guest')
    celery_broker_password = env('CELERY_BROKER_PASSWORD', default='guest')
    celery_broker_vhost = env('CELERY_BROKER_VHOST', default='/')
    celery_broker_url = f'amqp://{celery_broker_user}:{celery_broker_password}@{celery_broker_host}:{celery_broker_port}/{celery_broker_vhost}'
CELERY_BROKER_URL = celery_broker_url

# Celery Result Backend 配置：优先使用 CELERY_RESULT_BACKEND，否则从各组件构建
# 默认使用与 Cache 相同的 Redis 实例，Docker Compose 可通过环境变量指定 CELERY_RESULT_HOST=redis
celery_result_url = env('CELERY_RESULT_BACKEND', default=None)
if celery_result_url is None:
    celery_result_host = env('CELERY_RESULT_HOST', default='localhost')
    celery_result_port = env.int('CELERY_RESULT_PORT', default=6379)
    celery_result_db = env.int('CELERY_RESULT_DB', default=1)  # 使用 db=1，与 Cache 的 db=0 区分
    celery_result_url = f'redis://{celery_result_host}:{celery_result_port}/{celery_result_db}'
CELERY_RESULT_BACKEND = celery_result_url

CELERY_ACCEPT_CONTENT = ['json']
CELERY_TASK_SERIALIZER = 'json'
CELERY_RESULT_SERIALIZER = 'json'
CELERY_TIMEZONE = TIME_ZONE

from celery.schedules import crontab

CELERY_BEAT_SCHEDULE = {
    'daily_database_backup': {
        'task': 'api_v1.tasks.backup_database',
        'schedule': crontab(hour=3, minute=0),
        'kwargs': {
            'output_dir': str(BASE_DIR / 'data-bak'),
            'filename_prefix': 'db-backup',
        },
    },
    'mdy_product_sync': {
        'task': 'api_v1.tasks.sync_mdy_products',
        'schedule': crontab(minute='*/10'),
        'kwargs': {
            'page_size': MDY_SYNC_PAGE_SIZE,
            'max_pages': MDY_SYNC_MAX_PAGES,
            'max_records': MDY_SYNC_MAX_RECORDS,
        },
    },
    'mdy_customer_sync': {
        'task': 'api_v1.tasks.sync_mdy_customers',
        'schedule': crontab(minute='*/5'),
        'kwargs': {
            'page_size': MDY_SYNC_PAGE_SIZE,
            'max_pages': MDY_SYNC_MAX_PAGES,
            'max_records': MDY_SYNC_MAX_RECORDS,
        },
    },
}