class AppException(Exception):
    """应用异常基类"""
    def __init__(self, code: int, message: str, detail: str = None):
        self.code = code
        self.message = message
        self.detail = detail
        super().__init__(message)


class DatabaseException(AppException):
    """数据库操作失败"""
    def __init__(self, message: str = "数据库操作失败", detail: str = None):
        super().__init__(code=500, message=message, detail=detail)


class ModelException(AppException):
    """模型推理失败"""
    def __init__(self, message: str = "模型推理失败", detail: str = None):
        super().__init__(code=500, message=message, detail=detail)


class FileServiceException(AppException):
    """文件服务失败"""
    def __init__(self, message: str = "文件服务操作失败", detail: str = None):
        super().__init__(code=500, message=message, detail=detail)


class ValidationException(AppException):
    """业务校验失败"""
    def __init__(self, message: str = "参数校验失败", detail: str = None):
        super().__init__(code=400, message=message, detail=detail)