"""Policy serialization helpers."""

from __future__ import annotations

import json

from app.common.types import PolyGuardAction


def action_to_json(action: PolyGuardAction) -> str:
    return json.dumps(action.model_dump(mode="json"), ensure_ascii=True)


def action_to_xml(action: PolyGuardAction) -> str:
    payload = action.model_dump(mode="json")
    lines = ["<decision>"]
    for key in [
        "mode",
        "action_type",
        "target_drug",
        "replacement_drug",
        "dose_bucket",
        "taper_days",
        "monitoring_plan",
        "candidate_id",
        "confidence",
        "rationale_brief",
    ]:
        lines.append(f"  <{key}>{payload.get(key)}</{key}>")
    lines.append("</decision>")
    return "\n".join(lines)