import { useParams } from 'react-router';
import { DEFAULT_OFFSCALE_SECTION, isOffscaleSection, type OffscaleSectionId } from './shared';

// The URL is the source of truth for which section is open — not a panel channel. See docs/navigation-audit.md:
// selection held in a channel means the id lives only in an onClick closure, so the section can't be linked to,
// opened in a new tab, or reached with the back button. OffscaleScreen redirects anything unrecognised, so the
// fallback here is only for the instant before that lands.

export function useOffscaleSection(): OffscaleSectionId {
  const { section } = useParams();
  return isOffscaleSection(section) ? section : DEFAULT_OFFSCALE_SECTION;
}