/**
 * This Source Code is subject to the terms of the Mozilla Public
 * License, v. 2.0. If a copy of the MPL was not distributed with this
 * file, You can obtain one at http://mozilla.org/MPL/2.0/.
 *
 * Copyright (c) Infonomic Company Limited
 */

/**
 * Pathless route definition for everything Byline-rendered (the admin
 * shell and the sign-in page). The `_byline` prefix doesn't contribute
 * to URL paths — by default, `/_byline/admin/...` resolves to `/admin/...` and
 * `/_byline/sign-in` resolves to `/sign-in`.
 *
 * This file is intentionally light. The router needs the route definition
 * at startup to build the tree for URL matching, so anything *statically*
 * imported here ends up in the eager module graph (and Vite will
 * modulepreload its dependencies on every page).
 *
 * The component, providers, and Byline UI stylesheets live in the sibling
 * `route.lazy.tsx` — TanStack Router loads that file on demand when a
 * `_byline/*` URL matches, so the editor + admin shell deps stay out of
 * public-route bundles.
 *
 * Registering the Byline admin config has two complementary entry points
 * (both call `defineAdminConfig` idempotently):
 *  - the `beforeLoad` below — covers the *loader* phase, resolving before any
 *    `_byline/*` child loader reads the config (e.g. the admin dashboard
 *    loader's `getAdminConfig()`);
 *  - the side-effect import in `route.lazy.tsx` — covers component render /
 *    initial hydration, where `beforeLoad` is not re-run.
 * Both use `byline/admin.config` (a dynamic import here), so its module graph
 * (incl. the Lexical editor) stays code-split out of the eager/public bundle.
 */

import { createFileRoute } from '@tanstack/react-router'

export const Route = createFileRoute('/_byline')({
  beforeLoad: async () => {
    // Register the Byline admin config (`defineAdminConfig` runs as a
    // side-effect of importing `byline/admin.config`) before any `_byline/*`
    // child loader reads it. A parent route's `beforeLoad` resolves before its
    // children's loaders, closing the dev race where a loader outran the lazy
    // component module's side-effect import (on the client there is no
    // server-config fallback, so `getAdminConfig()` threw "Byline has not been
    // configured yet"). The dynamic import keeps `admin.config` out of the
    // eager/public bundle and evaluates once (cached). NOTE: `beforeLoad` is
    // not re-run on initial client hydration (the SSR result is dehydrated), so
    // the `route.lazy.tsx` side-effect import registers the config for the
    // hydrated component render.
    await import('../../../byline/admin.config')
  },
})