"""
EnergiBridge Skeleton: canonical bridge between GridVerse primitives and a
vendor-agnostic intermediate representation (IR) inspired by CatOpt-like
intermediates.

This module provides a small, production-friendly helper set that a future
implementation can plug into the GraphContractRegistry and Adapter Marketplace
to enable cross-domain interoperability without rewriting solvers.
"""

from typing import Any, Dict, Tuple, Optional


class EnergiBridge:
    """EnergiBridge: bridge between GridVerse primitives and a canonical IR.

    This is a pragmatic, production-friendly surface that downstream components
    can rely on when wiring adapters. It focuses on stability and small surface
    surface area, enabling predictable interoperability without pulling in a
    large external IR library.
    """

    @staticmethod
    def to_ir(contract_type: str, payload: Dict[str, Any], metadata: Optional[Dict[str, Any]] = None) -> Dict[str, Any]:
        """Convert a GridVerse contract into a canonical IR payload.

        The IR is deliberately lightweight but includes a stable schema
        (ir_type, ir_payload) plus optional metadata. If no metadata is
        supplied, a sensible default is applied.

        Args:
            contract_type: The name of the contract (e.g., "LocalProblem").
            payload: The contract payload data.
            metadata: Optional metadata dictionary (e.g., source, version).

        Returns:
            A dict representing the IR contract, suitable for transport or
            storage in the registry.
        """
        if metadata is None:
            metadata = {
                "source": "gridverse",
                "version": "0.2",
                "schema": "EnergiBridge.v0.2",
            }
        # Attach a small, deterministic, environment-agnostic header to aid auditing
        if "timestamp" not in metadata:
            try:
                import time
                metadata["timestamp"] = int(time.time())
            except Exception:
                metadata["timestamp"] = 0
        return {
            "ir_type": contract_type,
            "ir_payload": payload,
            "metadata": metadata,
        }

    @staticmethod
    def from_ir(ir: Dict[str, Any]) -> Tuple[str, Dict[str, Any]]:
        """Reverse translation from IR to a GridVerse contract tuple."""
        contract_type = ir.get("ir_type")
        if contract_type is None:
            contract_type = "UnknownContract"
        payload = ir.get("ir_payload", {})
        return contract_type, payload

    @staticmethod
    def map_gridverse_to_catopt(gridverse_contract: Dict[str, Any]) -> Dict[str, Any]:
        """Tiny mapper from GridVerse contract to a canonical IR representation.

        This demonstrates how a contract could be re-wired into an IR-compatible
        payload that adapters can consume. It keeps a thin, stable surface and
        defers heavy lifting to downstream components.
        """
        ct = gridverse_contract.get("type") or gridverse_contract.get("contract_type")
        if ct is None:
            ct = "UnknownContract"
        else:
            ct = str(ct)
        payload = gridverse_contract.get("payload") or gridverse_contract
        return EnergiBridge.to_ir(ct or "UnknownContract", payload)

    @staticmethod
    def create_metadata_for_audit(contract_type: str) -> Dict[str, Any]:
        """Helper to produce a minimal audit metadata block for a contract."""
        import time
        return {
            "source": "gridverse",
            "version": "0.2",
            "contract_type": contract_type,
            "timestamp": int(time.time()),
        }