from fastapi import FastAPI, Request
from fastapi import status
from pydantic_validation_decorator import FieldValidationError

from core.exceptions import (
    LoginException,
    ServiceWarning,
    ServiceException,
    AuthException,
    ModelValidatorException,
    PermissionException,
)
from utils import ResponseUtil, logger


def add_exception_middleware(app: FastAPI):
    """
    添加全局异常处理中间件
    将通用的异常处理逻辑从装饰器中提取出来，提高代码复用性
    """

    @app.middleware("http")
    async def exception_middleware(request: Request, call_next):
        try:
            # 调用下一个中间件或路由处理函数
            response = await call_next(request)
            if response.status_code == status.HTTP_404_NOT_FOUND:
                return ResponseUtil.not_found(request.url.path)
            return response
        except AuthException as e:
            return ResponseUtil.unauthorized(msg=e.message, data=e.data)
        except PermissionException as e:
            return ResponseUtil.forbidden(msg=e.message, data=e.data)
        except (
            LoginException,
            ServiceWarning,
            ModelValidatorException,
            FieldValidationError,
        ) as e:
            # 处理登录异常和服务警告
            logger.warning(e.message)
            return ResponseUtil.failure(msg=e.message, data=e.data)
        except ServiceException as e:
            # 处理服务异常
            logger.error(e.message)
            return ResponseUtil.error(msg=e.message, data=e.data)
        except Exception as e:
            # 处理未预期的异常
            logger.exception(e)
            return ResponseUtil.error(msg=str(e))