"""No-change baseline."""

from __future__ import annotations

from app.common.enums import ActionType, DecisionMode, DoseBucket
from app.common.types import PolyGuardAction


def choose_no_change() -> PolyGuardAction:
    return PolyGuardAction(
        mode=DecisionMode.REGIMEN_OPT,
        action_type=ActionType.KEEP_REGIMEN,
        target_drug=None,
        replacement_drug=None,
        dose_bucket=DoseBucket.NA,
        taper_days=None,
        monitoring_plan=None,
        candidate_id="cand_01",
        confidence=0.8,
        rationale_brief="Baseline no-change policy.",
    )