"""Shared pytest fixtures and import stubs.

Hy-MT2's runtime imports torch and transformers, neither of which we want
as a test dependency for CI. We stub them out so the prompt-builder and
parser logic — the only deterministic parts — stay testable on a 0-cost CI
runner.
"""
import sys
import os.path as osp
import unittest.mock as mock

# Make the package importable regardless of where pytest is invoked from.
REPO_ROOT = osp.abspath(osp.join(osp.dirname(__file__), ".."))
if REPO_ROOT not in sys.path:
    sys.path.insert(0, REPO_ROOT)

# Stub torch BEFORE nodes.runtime is imported anywhere.
if "torch" not in sys.modules:
    fake_torch = mock.MagicMock(name="torch")
    fake_torch.bfloat16 = "bf16_sentinel"
    fake_torch.float16 = "fp16_sentinel"
    fake_torch.float32 = "fp32_sentinel"
    fake_torch.cuda.is_available.return_value = False
    sys.modules["torch"] = fake_torch