"""CLI tests for md2doc.py — argparse interface, no actual conversion."""
import subprocess
import sys
from pathlib import Path

REPO = Path(__file__).parent.parent


def run_cli(*args):
    return subprocess.run(
        [sys.executable, "md2doc.py", *args],
        cwd=REPO, capture_output=True, text=True
    )


def test_no_args_shows_usage():
    r = run_cli()
    assert r.returncode != 0
    assert "usage:" in r.stderr.lower()


def test_nonexistent_input_exits_1():
    r = run_cli("nonexistent.md")
    assert r.returncode == 1
    assert "not found" in r.stderr.lower()


def test_style_choices_listed_in_help():
    r = run_cli("--help")
    assert r.returncode == 0
    for s in ("elegant", "default", "dark", "mono", "report"):
        assert s in r.stdout


def test_invalid_style_rejected():
    tmp = REPO / "tests" / "tmp_test.md"
    tmp.write_text("# test\n")
    try:
        r = run_cli(str(tmp), "--style", "nonexistent")
        assert r.returncode != 0
    finally:
        tmp.unlink()