"""EnergiBridge: minimal canonical mapping for cross-domain interoperability.

This is a small MVP shim that translates Energysphere primitives into a
vendor-agnostic IR representation (very light-weight). The goal is to provide a
stable, testable layer that can be expanded to full CatOpt-like mappings while
preserving offline-first semantics and governance hooks in later iterations.
"""

from __future__ import annotations

from typing import Any, Dict

from .models import LocalProblem


class EnergiBridgeMapper:
    """Lightweight translator between Energysphere primitives and a canonical IR.

    Only a tiny subset is implemented to keep MVP surface small:
    - LocalProblem becomes a canonical Object with a few core fields.
    - SharedVariables/PlanDelta could be extended similarly in future iterations.
    """

    def __init__(self, namespace: str = "default") -> None:
        self.namespace = namespace

    def map_local_problem(self, lp: LocalProblem) -> Dict[str, Any]:
        """Map a LocalProblem to a canonical Object representation.

        The structure is intentionally simple but stable for downstream adapters
        to consume. It can be extended with versioning, provenance, and crypto
        tags in future iterations.
        """
        return {
            "type": "Object",
            "namespace": self.namespace,
            "site_id": lp.site_id,
            "objective": lp.objective,
            "parameters": lp.parameters,
            "version": 1,
        }

    def map_object_to_local_problem(self, obj: Dict[str, Any]) -> LocalProblem:
        """Inverse mapping from canonical Object to LocalProblem when possible."""
        if obj.get("type") != "Object":
            raise ValueError("Unsupported canonical type: expected Object")
        # Basic reconstruction; in MVP we ignore extra fields safely.
        return LocalProblem(
            site_id=obj.get("site_id", ""),
            objective=obj.get("objective", ""),
            parameters=obj.get("parameters", {}),
        )


__all__ = ["EnergiBridgeMapper"]