from dataclasses import dataclass
from typing import Dict, Any

from .core import LocalProblem, SharedVariables, PlanDelta, DualVariables, PrivacyBudget, AuditLog


@dataclass
class EnergiaBridge:
    """Lightweight interoperability bridge placeholder.

    Maps internal CityGrid canonical primitives to a vendor-agnostic
    representation and exposes a minimal transport surface for adapters.
    """

    registry: object  # reference to a registry instance (e.g., GoCRegistry)

    def to_external_message(self, local: LocalProblem) -> Dict[str, Any]:
        # Minimal mapping example
        return {
            "type": "LocalProblem",
            "id": local.id,
            "domain": local.domain,
            "assets": local.assets,
            "objective": local.objective,
        }

    def from_external_message(self, payload: Dict[str, Any]) -> LocalProblem:
        # Basic reconstruction (for demonstration)
        return LocalProblem(
            id=payload.get("id", "unknown"),
            domain=payload.get("domain", "unknown"),
            assets=payload.get("assets", []),
            objective=payload.get("objective", {}),
        )