"""OnboardRuntime: minimal deterministic planner runtime scaffold."""
from __future__ import annotations

from typing import List, Dict, Any
from time import time

from .dsl import LocalProblem, PlanDelta, SharedVariables, to_nir


class OnboardRuntime:
    def __init__(self, backend) -> None:
        # backend expected to implement run(nir: dict, time_budget_s: float) -> dict
        self.backend = backend

    def plan(self, local_problems: List[LocalProblem], deltas: List[PlanDelta], shared: SharedVariables, time_budget_s: float) -> Dict[str, Any]:
        nir = to_nir(local_problems, deltas, shared)
        result = self.backend.run(nir, time_budget_s)
        # Attach some provenance-like fields for auditing in MVP
        result["timestamp"] = time()
        result["nir"] = nir
        return result