# -*- coding: utf-8 -*-
"""
DRF 自定义异常处理器：统一错误响应格式为 code、data、msg。
"""
from rest_framework.views import exception_handler
from rest_framework.exceptions import APIException


def custom_exception_handler(exc, context):
    response = exception_handler(exc, context)
    if response is not None:
        if isinstance(exc, APIException) and getattr(exc, "status_code", None):
            response.status_code = exc.status_code
        code = response.status_code
        if isinstance(response.data, list):
            msg = response.data[0] if response.data else str(exc)
        elif isinstance(response.data, dict) and "detail" in response.data:
            msg = response.data["detail"]
        else:
            msg = str(response.data) if response.data else str(exc)
        response.data = {"code": code, "data": None, "msg": msg}
    return response