"""_tui_need_npm_install: auto npm when lockfile ahead of node_modules."""

import os
from pathlib import Path

import pytest


@pytest.fixture
def main_mod():
    import hermes_cli.main as m

    return m


def _touch_ink(root: Path) -> None:
    ink = root / "node_modules" / "@hermes" / "ink" / "package.json"
    ink.parent.mkdir(parents=True, exist_ok=True)
    ink.write_text("{}")


def test_need_install_when_ink_missing(tmp_path: Path, main_mod) -> None:
    (tmp_path / "package-lock.json").write_text("{}")
    assert main_mod._tui_need_npm_install(tmp_path) is True


def test_need_install_when_lock_newer_than_marker(tmp_path: Path, main_mod) -> None:
    _touch_ink(tmp_path)
    (tmp_path / "package-lock.json").write_text("{}")
    (tmp_path / "node_modules" / ".package-lock.json").write_text("{}")
    os.utime(tmp_path / "package-lock.json", (200, 200))
    os.utime(tmp_path / "node_modules" / ".package-lock.json", (100, 100))
    assert main_mod._tui_need_npm_install(tmp_path) is True


def test_no_install_when_lock_older_than_marker(tmp_path: Path, main_mod) -> None:
    _touch_ink(tmp_path)
    (tmp_path / "package-lock.json").write_text("{}")
    (tmp_path / "node_modules" / ".package-lock.json").write_text("{}")
    os.utime(tmp_path / "package-lock.json", (100, 100))
    os.utime(tmp_path / "node_modules" / ".package-lock.json", (200, 200))
    assert main_mod._tui_need_npm_install(tmp_path) is False


def test_need_install_when_marker_missing(tmp_path: Path, main_mod) -> None:
    _touch_ink(tmp_path)
    (tmp_path / "package-lock.json").write_text("{}")
    assert main_mod._tui_need_npm_install(tmp_path) is True


def test_no_install_without_lockfile_when_ink_present(tmp_path: Path, main_mod) -> None:
    _touch_ink(tmp_path)
    assert main_mod._tui_need_npm_install(tmp_path) is False
