"""Bundled resources and writable, private user data locations."""
import os
from pathlib import Path


def resource_root() -> Path:
    source = Path(__file__).resolve().parent.parent
    return source if (source / 'templates/invoice.html.j2').is_file() else Path(__file__).resolve().parent / 'data'


def private_root(resources: Path | None = None) -> Path:
    root = resources or resource_root()
    default = root / 'private' if root.name != 'data' else Path.home() / '.local/share/jr-einvoice'
    return Path(os.environ.get('JR_EINVOICE_HOME', str(default))).expanduser().resolve()


def presets_root(resources: Path | None = None) -> Path:
    return Path(os.environ.get('JR_EINVOICE_PRESETS', str(private_root(resources) / 'presets'))).expanduser().resolve()