// Every route this site serves, in one place.
//
// `scripts/prerender.js` used to build its own list while `src/routes.jsx` built
// the router's, and nothing compared them. A route added to one and not the
// other is not a small bug: the page is never prerendered, so `server/index.js`
// answers a direct request for it with `dist/404.html`, and every visitor
// following a link and every crawler reading the sitemap gets a 404 on a page
// the site's own navigation points at.
//
// Plain JavaScript with no side effects, because prerender imports it in Node
// before Vite exists, and so does the validator runner.
import { services } from '../../src/data/services.js'
import { industries } from '../../src/data/industries.js'

export const STATIC_ROUTES = [
  '/',
  '/about',
  '/services',
  '/industries',
  '/contact',
  '/support',
  '/privacy-policy',
]

export const ROUTES = [
  ...STATIC_ROUTES,
  ...services.map((service) => `/services/${service.id}`),
  ...industries.map((industry) => `/industries/${industry.id}`),
]

const join = (base, path) => `${base}/${path}`.replace(/\/{2,}/g, '/')

/** Flattens the router's nested table into the paths it declares. */
export const routerPaths = (table, base = '') =>
  table.flatMap((route) => {
    const self = route.index ? base || '/' : route.path === '/' ? '/' : join(base, route.path ?? '')
    const children = route.children ? routerPaths(route.children, self === '/' ? '' : self) : []
    return [self, ...children]
  })

/**
 * Routes the router declares that nothing prerenders. A path with a parameter
 * (`/services/:slug`) or the catch-all is covered by the data lists above
 * rather than by a literal, so neither counts as drift.
 */
export const routeDrift = (table) => [
  ...new Set(
    routerPaths(table)
      .filter((path) => !path.includes(':') && !path.includes('*'))
      .filter((path) => !ROUTES.includes(path)),
  ),
]