from __future__ import annotations

import json
from http import HTTPStatus

from backend.features.mentor.agent import MentorAgentError


class MentorHttpMixin:
    def stream_mentor_chat(self) -> None:
        try:
            body = self.read_json_body()
            stream = self.application_service.mentor_stream(body)
        except (ValueError, json.JSONDecodeError) as exc:
            self.send_json({"error": str(exc)}, HTTPStatus.BAD_REQUEST)
            return
        self.send_ndjson_stream(stream, (ValueError, MentorAgentError))