"""结构化操作日志公共模型。"""
import re
from services import db as _db

_READY=False
HIGH_ACTIONS={'权限变更','产品彻底删除','删除订单','下单回退','回退订单','修改成本价','价格审核','批量删除','数据修复','批量数据修复'}
MEDIUM_ACTIONS={'产品批量编辑','产品导入','修改下单数量','订单字段编辑','到货批次及数量','品牌分类','新增供应商'}
PAGE_PATHS=[
 ('/api/planning','计划预测'),('/api/purchase','采购管理'),('/api/domestic','国内订单管理'),('/api/overseas','海外订单管理'),('/api/packaging','包材订单管理'),('/api/products','产品信息管理'),('/api/product','产品信息管理'),('/api/bom','物料清单管理'),('/api/supplier','供应商管理'),('/api/permissions','权限配置'),('/api/users','用户管理'),('/api/config','参数配置'),('/api/warehouse','仓库管理'),('/api/inventory','库存管理'),('/api/feedback','问题反馈'),('/api/knowledge','知识库')]

def ensure_audit_schema():
 global _READY
 if _READY:return
 column_rows=_db.query("SELECT COLUMN_NAME FROM information_schema.columns WHERE table_schema=DATABASE() AND table_name='dashboard_logs'")
 if not isinstance(column_rows, (list, tuple)):
  _READY=True
  return
 cols={r['COLUMN_NAME'] for r in column_rows}
 defs={
  'event_type':"VARCHAR(40) NOT NULL DEFAULT 'data_change'",'result_status':"VARCHAR(20) NOT NULL DEFAULT 'success'",'risk_level':"VARCHAR(20) NOT NULL DEFAULT 'normal'",'object_type':"VARCHAR(100) NULL",'object_id':"VARCHAR(200) NULL",'old_values':"LONGTEXT NULL",'new_values':"LONGTEXT NULL",'request_method':"VARCHAR(10) NULL",'request_path':"VARCHAR(255) NULL",'request_id':"VARCHAR(64) NULL",'user_agent':"VARCHAR(500) NULL",'role_snapshot':"VARCHAR(50) NULL",'position_snapshot':"VARCHAR(100) NULL",'http_status':"INT NULL"}
 for name,definition in defs.items():
  if name not in cols: _db.query(f"ALTER TABLE dashboard_logs ADD COLUMN `{name}` {definition}")
 indexes={r['INDEX_NAME'] for r in _db.query("SELECT INDEX_NAME FROM information_schema.statistics WHERE table_schema=DATABASE() AND table_name='dashboard_logs'")}
 for name,sql in {'idx_logs_created':'created_at','idx_logs_user_created':'user_id,created_at','idx_logs_page_created':'page,created_at','idx_logs_action_created':'action,created_at','idx_logs_risk_created':'risk_level,created_at','idx_logs_result_created':'result_status,created_at','idx_logs_request':'request_id'}.items():
  if name not in indexes: _db.query(f"CREATE INDEX {name} ON dashboard_logs ({sql})")
 high = ','.join(['%s'] * len(HIGH_ACTIONS)); medium = ','.join(['%s'] * len(MEDIUM_ACTIONS))
 _db.query(f"UPDATE dashboard_logs SET risk_level='high' WHERE action IN ({high}) OR COALESCE(field,'') REGEXP '成本价|单价|权限|删除|回退'", tuple(HIGH_ACTIONS))
 _db.query(f"UPDATE dashboard_logs SET risk_level='medium' WHERE risk_level<>'high' AND action IN ({medium})", tuple(MEDIUM_ACTIONS))
 _READY=True

def infer_page(path,action=''):
 for prefix,name in PAGE_PATHS:
  if str(path or '').startswith(prefix):return name
 return action or ''

ACTION_PATHS = [
 ('/api/domestic/orders/update','编辑国内订单'),('/api/packaging/orders/update','编辑包材订单'),('/api/overseas/orders/update','编辑海外订单'),('/api/purchase/add_pending','加入待下单'),('/api/purchase/confirm_order','确认下单'),('/api/new_products/bom/save','保存新品BOM'),('/api/bom/create_with_materials','保存物料清单'),('/api/bom/delete','删除物料清单'),('/api/users/update','编辑用户'),('/api/users/create','新增用户'),('/api/product/remark/save','保存产品批注'),('/api/planning/scheme/save','保存计划预测方案'),('/api/planning/scheme/delete','删除计划预测方案'),('/api/supplier/update','编辑供应商'),('/api/supplier/delete','删除供应商'),('/api/feedback/submit','提交问题反馈')]

def infer_action(path, method=''):
 for prefix,name in ACTION_PATHS:
  if str(path or '').startswith(prefix):return name
 page=infer_page(path,'系统操作')
 return ('删除' if method=='DELETE' else '更新') + page

def classify_event(action,path='',method=''):
 text=str(action or '')
 if '登录' in text:return 'login'
 if '权限' in text:return 'security'
 if '导入' in text:return 'import'
 if '导出' in text:return 'export'
 if '删除' in text or method=='DELETE':return 'delete'
 if any(x in text for x in ('新增','创建')):return 'create'
 if method in ('POST','PUT','PATCH'):return 'update'
 return 'data_change'

def classify_risk(action='',field='',path=''):
 if action in HIGH_ACTIONS or re.search(r'成本价|单价|权限|删除|回退',str(field or '')) or re.search(r'permission|delete|rollback|update_price',str(path or ''),re.I):return 'high'
 if action in MEDIUM_ACTIONS:return 'medium'
 return 'normal'

def infer_object(data,path=''):
 if not isinstance(data,dict):return ('','')
 for key in ('product_code','material_code','supplier_code','record_id','order_id','subject_id','target_id','id','user_id'):
  value=data.get(key)
  if value not in (None,''):
   return (key.replace('_code','').replace('_id',''),str(value))
 return ('','')