from __future__ import annotations

import os
from pathlib import Path


def test_environment_screen_expands_shell_vars_for_filesystem(monkeypatch, tmp_path: Path):
    """Regression: `$HOME`/`$PROLE_HOME` must be expanded before mkdir/copy.

    Without this, setting `PROLE_HOME=$HOME/prole` can create a literal `$HOME`
    directory in the current working directory.
    """

    # Isolate CWD so a regression can't pollute the repo checkout.
    monkeypatch.chdir(tmp_path)

    home_dir = tmp_path / "home"
    home_dir.mkdir(parents=True, exist_ok=True)
    monkeypatch.setenv("HOME", str(home_dir))

    # Provide a minimal PROJECT_ROOT so `_save_env_to_file` has tiny copy sources.
    proj = tmp_path / "project_root"
    (proj / "etc").mkdir(parents=True, exist_ok=True)
    (proj / "etc" / "init-port-forward.sh").write_text("#!/usr/bin/env bash\necho ok\n")

    import knoe.ui.screens.environment as env_screen

    monkeypatch.setattr(env_screen, "PROJECT_ROOT", proj)

    class Dummy(env_screen.EnvironmentScreenMixin):
        pass

    dummy = Dummy()

    values = {
        "PROLE_HOME": "$HOME/prole",
        "PROLE_CONF": "$PROLE_HOME/conf",
        "PROLE_DATA": "$PROLE_HOME/data",
        "PROLE_LOGS": "$PROLE_HOME/logs",
        "PROLE_SERVICE": "$PROLE_HOME/etc",
    }
    dummy._save_env_to_file(values)

    expected_home = home_dir / "prole"
    assert expected_home.is_dir()
    assert (expected_home / "conf").is_dir()
    assert (expected_home / "data").is_dir()
    assert (expected_home / "logs").is_dir()
    assert (expected_home / "etc").is_dir()
    assert (expected_home / "env.sh").is_file()

    # Critical assertion: we must NOT create a literal `$HOME` directory in CWD.
    assert not (tmp_path / "$HOME").exists()