from typing import Any, Generic, Optional, TypeVar
from pydantic import BaseModel, Field
# from pydantic.generics import GenericModel

T = TypeVar('T')

class StandardResponse(BaseModel, Generic[T]):
    """标准API响应格式"""
    code: int = 200
    message: Optional[str] = None
    data: Optional[T] = None

    class Config:
        json_schema_extra = {
            "example": {
                "code": 200,
                "message": None,
                "data": {}
            }
        }

class ErrorResponse(BaseModel):
    """错误响应格式"""
    code: int = 500
    message: str
    data: None = None

    class Config:
        json_schema_extra = {
            "example": {
                "code": 500,
                "message": "业务处理错误",
                "data": None
            }
        }