import routesFile from './seo.routes.json';

export const SITE_ORIGIN = routesFile.origin;

export type SeoRoute = {
  path: string;
  title: string;
  description: string;
  index: boolean;
};

export const INDEXABLE_ROUTES: SeoRoute[] = routesFile.routes.map((r) => ({
  ...r,
  index: true,
}));

export const NOT_FOUND_SEO: SeoRoute = {
  path: '',
  title: 'Page not found — LexAI',
  description: 'That address is not a LexAI page.',
  index: false,
};

const byPath = new Map(INDEXABLE_ROUTES.map((r) => [r.path, r]));

export function seoForPath(pathname: string): SeoRoute {
  const normalized = pathname.replace(/\/+$/, '') || '/';
  return byPath.get(normalized) ?? NOT_FOUND_SEO;
}

export function canonicalUrl(path: string): string {
  if (!path || path === '/') return `${SITE_ORIGIN}/`;
  return `${SITE_ORIGIN}${path.startsWith('/') ? path : `/${path}`}`;
}