import fcntl
import os
import subprocess
from pathlib import Path


def test_repo_upgrade_refuses_concurrent_run(tmp_path):
    script = Path(__file__).parents[1] / "deploy" / "repo-upgrade.sh"
    lock_path = tmp_path / "repo-upgrade.lock"
    bin_dir = tmp_path / "bin"
    bin_dir.mkdir()
    fake_id = bin_dir / "id"
    fake_id.write_text("#!/bin/sh\nprintf '0\\n'\n")
    fake_id.chmod(0o755)

    with lock_path.open("w") as lock:
        fcntl.flock(lock, fcntl.LOCK_EX | fcntl.LOCK_NB)
        result = subprocess.run(
            ["sh", str(script), "v1.2.3"],
            env={
                **os.environ,
                "PATH": f"{bin_dir}:{os.environ['PATH']}",
                "IMPORTARR_ENV_FILE": str(tmp_path / "missing.env"),
                "IMPORTARR_PREFIX": str(tmp_path),
            },
            capture_output=True,
            text=True,
            check=False,
        )

    assert result.returncode == 1
    assert "another Importarr upgrade is already running" in result.stderr