"""Assemble the same import roots used by the deployed Hermes overlay.

The Space copies this repository's ``trading`` and ``tools`` modules into a
full Hermes checkout at ``/opt/hermes``.  Local tests must point
``HERMES_SOURCE_DIR`` at an actual Hermes checkout so imports such as
``tools.registry`` come from their real owner rather than from a stub.
"""
from __future__ import annotations

import os
import sys
from pathlib import Path


OVERLAY_ROOT = Path(__file__).resolve().parents[1]
PROJECT_ROOT = OVERLAY_ROOT.parent
if str(PROJECT_ROOT) not in sys.path:
    sys.path.insert(0, str(PROJECT_ROOT))
HERMES_SOURCE = Path(os.environ.get("HERMES_SOURCE_DIR", "/opt/hermes"))

if HERMES_SOURCE.is_dir():
    sys.path.insert(0, str(HERMES_SOURCE))
    sys.path.insert(1, str(OVERLAY_ROOT))
    import tools

    overlay_tools = str(OVERLAY_ROOT / "tools")
    if overlay_tools not in tools.__path__:
        tools.__path__.insert(0, overlay_tools)
else:
    # The deploy overlays these files into a full Hermes checkout. For a
    # standalone source-package test run, provide only the tiny registry surface
    # needed at import time; production never sees this test-only module.
    import types

    sys.path.insert(0, str(OVERLAY_ROOT))

    class _TestRegistry:
        def __init__(self):
            self.registrations = []

        def register(self, **kwargs):
            self.registrations.append(kwargs)

    registry_module = types.ModuleType("tools.registry")
    registry_module.registry = _TestRegistry()
    sys.modules.setdefault("tools.registry", registry_module)