"""Tests never take the loop lock of the checkout they run in.

run_loop.sh puts its control root at its own checkout (MAM_REAL_ROOT =
REPO_ROOT) and takes `${MAM_LOOP_MARKER:-$MAM_REAL_ROOT/.mam/loop-guard-active}`
once the arguments parse (mam_acquire_loop_lock creates the directory). In the
main checkout that is the live loop's lock: a test run would take it for a
moment - refusing a real loop, or being refused by one - and leave `.mam/`
behind in a review tree. Every test that reaches the lock through the
checkout's own run_loop.sh therefore names a marker under its tmp_path.

L1 copies this checkout and runs those tests there: the copy gets no `.mam`.
"""
from __future__ import annotations

import os
import re
import subprocess
import sys

from test_issue17_workspace_root_isolation import _copy_checkout

# every test that runs the checkout's run_loop.sh far enough to take the lock
# (a sweep of the run_loop.sh users on 97c2946; --help and argument errors
# end before the lock, copies of the tree and mam_sandbox trees are not the
# checkout). The first two took the checkout's lock at 97c2946.
NODES = [
    "tests/test_o3_scoped_guard.py::test_b13_reexec_preserves_original_argv",
    "tests/test_o3_scoped_guard.py::test_b13_no_freeze_switch_disables_reexec",
    "tests/test_issue5_phase3_loop.py::test_p3_02_run_loop_wrapper_delegates_to_python_default",
    "tests/test_issue5_phase3_loop.py::test_p3_02_run_loop_wrapper_rollback_mode",
    "tests/test_loop_cli.py::test_creator_parses_and_reaches_session_check",
    "tests/test_o2_race_free_lock.py::test_o2_12_run_loop_exits_on_lock_failure",
    "tests/test_issue25_plan_reuse.py::test_p7b_the_legacy_shell_loop_refuses_the_option",
]


def test_l1_no_test_takes_the_loop_lock_of_its_checkout(tmp_path):
    copy = tmp_path / "checkout"
    _copy_checkout(copy)
    assert not (copy / ".mam").exists()
    env = {k: v for k, v in os.environ.items() if not k.startswith(("HERDR_", "MAM_", "MQTT_", "SKS_"))}
    env.update(WORKSPACE_ROOT=str(copy), AGENT_PYTHON_BIN=sys.executable, PYTHONDONTWRITEBYTECODE="1")
    env.pop("PYTHONPATH", None)
    res = subprocess.run([sys.executable, "-m", "pytest", "-p", "no:cacheprovider", "-q",
                          f"--basetemp={tmp_path / 'bt'}", *NODES],
                         capture_output=True, text=True, cwd=str(copy), env=env, timeout=900)
    assert res.returncode == 0, res.stdout[-3000:] + res.stderr[-2000:]
    summary = res.stdout.strip().splitlines()[-1]
    assert int(re.search(r"(\d+) passed", summary).group(1)) >= len(NODES) and "skipped" not in summary, summary
    assert not (copy / ".mam").exists(), "a test took the checkout's loop lock (its .mam was created)"