app/routers/sandbox.py

from fastapi import APIRouter
from pydantic import BaseModel

from app.agents.tutor_agent import TutorAgent
from app.agents.shell_visual_engine import ShellVisualEngine

router = APIRouter(prefix="/sandbox", tags=["sandbox"])
_tutor: TutorAgent | None = None
_shell: ShellVisualEngine | None = None


def _get_tutor() -> TutorAgent:
    global _tutor
    if _tutor is None:
        _tutor = TutorAgent()
    return _tutor


def _get_shell() -> ShellVisualEngine:
    global _shell
    if _shell is None:
        _shell = ShellVisualEngine()
    return _shell


class RepairRequest(BaseModel):
    original_html: str
    error_message: str
    node_id: str = ""
    animation_type: str = "canvas"


@router.post("/repair")
def repair_visual(req: RepairRequest):
    if req.animation_type in ("3d", "2d_anim"):
        shell_visual = _get_shell().repair_setup_code(
            req.original_html, req.animation_type, req.error_message
        )
        if shell_visual is not None:
            return {"visual": shell_visual.model_dump()}
    visual = _get_tutor().repair_visual(req.original_html, req.error_message)
    return {"visual": visual.model_dump()}