from __future__ import annotations

"""Tiny adapters registry for two-venue MVP.

This module is deliberately small; it provides a stub registry that could be
extended to map LocalTrade -> canonical representation and to register
simple venue adapters. It demonstrates the intended extension point.
"""

import json

ADAPTER_REGISTRY = {}


def register_adapter(name: str, adapter: object) -> None:
    ADAPTER_REGISTRY[name] = adapter


def get_adapter(name: str):
    return ADAPTER_REGISTRY.get(name)


# Lightweight, two-venue MVP adapters (stubbed for bootstrap).
# These adapters translate between a venue-specific message format and
# the canonical LocalTrade/SharedSignals/PlanDelta representation used
# by the TradeCipher core. The implementations here are intentionally
# minimal placeholders to unblock interoperability testing.

class VenueAAdapter:
    name = "VenueA"

    @staticmethod
    def to_canonical(obj: object) -> dict:
        # Placeholder translation: assume obj is already a dict-like
        # representation compatible with canonical fields.
        if hasattr(obj, "to_json"):
            return json.loads(obj.to_json())  # type: ignore
        if isinstance(obj, dict):
            return obj
        return {}  # pragma: no cover

    @staticmethod
    def from_canonical(data: dict) -> object:
        # Return as-is; in a full implementation this would construct
        # a venue-specific LocalTrade message.
        return data


class VenueBAdapter:
    name = "VenueB"

    @staticmethod
    def to_canonical(obj: object) -> dict:
        if hasattr(obj, "to_json"):
            return json.loads(obj.to_json())  # type: ignore
        if isinstance(obj, dict):
            return obj
        return {}

    @staticmethod
    def from_canonical(data: dict) -> object:
        return data


def register_default_adapters() -> None:
    """Register default, stub adapters for VenueA and VenueB.

    This is a minimal bootstrap to enable end-to-end wiring in tests
    and examples. Real adapters would implement complete mapping logic.
    """
    register_adapter(VenueAAdapter.name, VenueAAdapter)
    register_adapter(VenueBAdapter.name, VenueBAdapter)


# Autoload default adapters on import, so downstream code can rely on them
# being present without extra setup. This keeps the module side-effect-free
# for testing environments that import adapters without needing a runner.
try:
    register_default_adapters()
except Exception:
    # If anything goes wrong in bootstrap, fail softly to not break local tests
    pass