"""Pytest config for the RELATION suite.

On this Windows box the default pytest basetemp under %LOCALAPPDATA%\\Temp can
hit a PermissionError; redirect tmp_path-based fixtures to a writable location
under C:/tmp (the project's additional working directory) when the user has not
already supplied --basetemp. This keeps `python -m pytest tests/` runnable with
zero extra flags.
"""

from __future__ import annotations

import os
from pathlib import Path


def pytest_configure(config) -> None:
    # Respect an explicitly-supplied --basetemp.
    if config.option.basetemp:
        return
    candidate = Path("C:/tmp/pytest_base")
    try:
        candidate.mkdir(parents=True, exist_ok=True)
        # Confirm it is writable before claiming it.
        probe = candidate / ".write_probe"
        probe.write_text("ok", encoding="utf-8")
        probe.unlink()
    except OSError:
        return
    config.option.basetemp = str(candidate)
    os.environ.setdefault("PYTEST_DEBUG_TEMPROOT", str(candidate))