"""Where the TUI keeps its files. `DIORA_TUI_HOME` moves all of it into one folder (tests, the
smoke script and anyone who wants a second account side by side use it); platformdirs' own
answer on Windows doesn't follow the LOCALAPPDATA/APPDATA environment variables."""

from __future__ import annotations

import os
from pathlib import Path

from platformdirs import user_cache_dir, user_config_dir, user_data_dir


def _home() -> Path | None:
    h = os.environ.get("DIORA_TUI_HOME")
    return Path(h) if h else None


def data_dir() -> Path:
    h = _home()
    return h / "data" if h else Path(user_data_dir("diora-tui", "diora"))


def config_dir() -> Path:
    h = _home()
    return h / "config" if h else Path(user_config_dir("diora-tui", "diora"))


def cache_dir() -> Path:
    h = _home()
    return h / "cache" if h else Path(user_cache_dir("diora-tui", "diora"))