/**
 * The join between the demo registry and the vertical lineup.
 *
 * This is the ONLY place the marketing pages touch the registry. Home, Gallery
 * and Vertical all read demos through here, so when the registry's export name
 * or path moves, it moves in one line instead of in four pages.
 */

import { demos } from '@/lib/demo-kit/registry';
import type { DemoMeta, Vertical } from '@/lib/demo-kit/types';
import { VERTICALS, verticalByKey } from '@/content/verticals';
import type { VerticalEntry } from '@/content/verticals';

/**
 * Route shapes, written down once. The router owns the actual `<Route>`
 * elements; these are what every link on the marketing side builds, so if the
 * two ever disagree, they disagree here and not in twenty JSX attributes.
 */
export const routes = {
  home: '/',
  gallery: '/gallery',
  honesty: '/honesty',
  demo: (slug: string) => `/demos/${slug}`,
  vertical: (slug: string) => `/verticals/${slug}`,
  /** Gallery pre-filtered to one vertical. Deep-linkable on purpose. */
  galleryFiltered: (key: Vertical) => `/gallery?vertical=${key}`,
} as const;

/**
 * The repository link belongs to the chrome, which already owns it. Re-exported
 * rather than repeated so the marketing pages and the footer cannot end up
 * pointing at two different repositories.
 */
export { REPO_URL } from '@/components/site/links';

/** Already sorted by `order` then slug by the registry. Never sort it again. */
export const allDemos: readonly DemoMeta[] = demos;

export const liveDemos: readonly DemoMeta[] = allDemos.filter((d) => d.status === 'live');

/**
 * The demo the site leads with. `reference` is the hello-world vertical, and
 * the first live one in it is the front door; if there is none yet, any live
 * demo will do, and only then do we fall back to whatever the registry has.
 * Written as a function of the registry so adding a demo never edits Home.
 */
export const featuredDemo: DemoMeta | undefined =
  liveDemos.find((d) => d.vertical === 'reference') ?? liveDemos[0] ?? allDemos[0];

/** Every vertical key that at least one demo is filed under. Filter source. */
export const verticalKeysInUse: readonly Vertical[] = Array.from(
  new Set(allDemos.map((d) => d.vertical)),
);

export function demosForVertical(key: Vertical | null): readonly DemoMeta[] {
  if (!key) return [];
  return allDemos.filter((d) => d.vertical === key);
}

export function demoBySlug(slug: string | undefined): DemoMeta | undefined {
  if (!slug) return undefined;
  return allDemos.find((d) => d.slug === slug);
}

/**
 * A demo's vertical, for a label on a card. `reference` deliberately resolves
 * to nothing — the word game is not an industry, and labelling it as one would
 * be the first small lie on a site whose whole argument is that it doesn't
 * tell them.
 */
export function verticalForDemo(demo: DemoMeta): VerticalEntry | undefined {
  return verticalByKey(demo.vertical);
}

/** The lineup, in the order we would build it. */
export const lineup: readonly VerticalEntry[] = [...VERTICALS].sort((a, b) => a.rank - b.rank);