#!/usr/bin/env python3
"""R-325: hub_copy_gate.check_drift accepts the controller gate IMPORTING the shared stem list.

Cases: a matching literal (ok), a diverged literal (drift), the import with no literal (ok — the
destination), an import that exists only in a comment (drift — the label without the fact), an import
beside a stale literal (drift), and an absent file (inconclusive, never a pass).
Run: python3 scripts/test_hub_copy_drift.py
"""
import os
import sys
import tempfile

sys.path.insert(0, os.path.dirname(os.path.abspath(__file__)))
import hub_copy_gate as g  # noqa: E402
from customer_copy_vocab import RETRIEVAL_STEMS  # noqa: E402

lit = "STEMS = [%s]\n" % ", ".join('"%s"' % x for x in RETRIEVAL_STEMS)
imp = "sys.path.insert(0, VOCAB_DIR)\nfrom customer_copy_vocab import RETRIEVAL_STEMS as STEMS  # noqa\n"
CASES = [
    ("matching-literal", "import re\n" + lit, "ok"),
    ("diverged-literal", "import re\nSTEMS = [\"visszaallithat\"]\n", "drift"),
    ("imports-shared", "import re\n" + imp, "ok"),
    ("import-in-comment-only", "import re\n# from customer_copy_vocab import RETRIEVAL_STEMS\n", "drift"),
    ("import-beside-stale-literal", imp + "STEMS = [\"x\"]\n", "drift"),
]
fails = 0
tmp = tempfile.mkdtemp(prefix="r325-")
for name, body, want in CASES:
    p = os.path.join(tmp, name + ".py")
    with open(p, "w", encoding="utf-8") as f:
        f.write(body)
    got, msg = g.check_drift(p)
    ok = got == want
    fails += not ok
    print("  %s %-28s want %-12s got %s" % ("ok  " if ok else "FAIL", name, want, got))
got, _ = g.check_drift(os.path.join(tmp, "absent.py"))
if got != "inconclusive":
    fails += 1
    print("  FAIL absent file -> %s, want inconclusive" % got)
else:
    print("  ok   absent file                  want inconclusive got inconclusive")
print("test_hub_copy_drift: %s" % ("FAILED" if fails else "OK"))
sys.exit(1 if fails else 0)