from fastapi import HTTPException, status

class AuthException(HTTPException):
    def __init__(self, detail: str = "Authentication failed"):
        super().__init__(status_code=status.HTTP_401_UNAUTHORIZED, detail=detail)

class NotFoundException(HTTPException):
    def __init__(self, detail: str = "Resource not found"):
        super().__init__(status_code=status.HTTP_404_NOT_FOUND, detail=detail)

class BadRequestException(HTTPException):
    def __init__(self, detail: str = "Bad request"):
        super().__init__(status_code=status.HTTP_400_BAD_REQUEST, detail=detail)

class RepositoryException(HTTPException):
    def __init__(self, detail: str = "Database operation failed"):
        super().__init__(status_code=status.HTTP_500_INTERNAL_SERVER_ERROR, detail=detail)