"""EnergiaBridge: Canonical bridge between GridVerse primitives and a vendor-agnostic
interoperability layer (CatOpt-style).

This is a minimal, production-ready skeleton intended to anchor the interoperability
story described in the GridVerse MVP plan. It provides small, well-defined mapping
points between GridVerse core contracts (Objects, Morphisms, PlanDelta, etc.) and a
canonical representation used by potential adapters and external runtimes.

Note: This module is intentionally lightweight. Real deployments should augment the
mapping logic with proper schema validation, versioning, cryptographic attestation,
and TLS transport glue.
"""

from __future__ import annotations

from dataclasses import dataclass, field
from typing import Any, Dict

@dataclass
class CanonicalBundle:
    """Canonical representation that adapters can consume/emit.

    - objects: canonical LocalProblem-like entities per-site
    - morphisms: canonical SharedVariables/DualVariables as channels
    - duals: coupling/duality signals between local problems and global constraints
    - plan_delta: incremental optimization actions to apply
    - governance: lightweight per-message metadata for audit/logs
    """

    objects: Dict[str, Any] = field(default_factory=dict)
    morphisms: Dict[str, Any] = field(default_factory=dict)
    duals: Dict[str, Any] = field(default_factory=dict)
    plan_delta: Dict[str, Any] = field(default_factory=dict)
    governance: Dict[str, Any] = field(default_factory=dict)

    def __repr__(self) -> str:
        return (
            f"CanonicalBundle(objects={len(self.objects)}, morphisms={len(self.morphisms)}, "
            f"duals={len(self.duals)}, plan_delta={len(self.plan_delta)}, governance={len(self.governance)})"
        )


def to_canonical(local_problem: Dict[str, Any], shared_vars: Dict[str, Any],
                 plan_delta: Dict[str, Any], version: str | None = None) -> CanonicalBundle:
    """Convert GridVerse primitives to a CanonicalBundle.

    This is a thin wrapper that can be extended with proper validation and versioning.
    """
    bundle = CanonicalBundle()
    bundle.objects = {
        k: v for k, v in (local_problem or {}).items()
    }
    bundle.morphisms = {
        k: v for k, v in (shared_vars or {}).items()
    }
    bundle.duals = {}  # Reserved for dual variables mapping; filled by adapters as needed
    bundle.plan_delta = plan_delta or {}
    bundle.governance = {
        "version": version or "0.1.0",
        "timestamp": __import__('time').time(),
        "note": "generated via to_canonical"
    }
    return bundle


def from_canonical(bundle: CanonicalBundle) -> Dict[str, Any]:
    """Inverse mapping: CanonicalBundle -> local primitives (placeholders).

    This is a minimal placeholder returning the contained dictionaries.
    Real usage should reconstruct proper GridVerse contracts with validation.
    """
    local_problem = dict(bundle.objects)
    shared_vars = dict(bundle.morphisms)
    plan_delta = dict(bundle.plan_delta)
    governance = dict(bundle.governance)
    return {
        "local_problem": local_problem,
        "shared_vars": shared_vars,
        "plan_delta": plan_delta,
        "governance": governance,
    }


__all__ = ["CanonicalBundle", "to_canonical", "from_canonical"]