// vue-seo-layer: the frontend half of the SummerCMS SEO plugin
// (golem15.seo). For every page it asks GET /_seo/api/v1/resolve?url=…,
// enforces the redirect and 410 decisions, and sets the head (title,
// description, canonical, robots, Open Graph, X/Twitter, verification,
// hreflang, <html lang> and one JSON-LD @graph) from the answer with priority
// over the page's own tags. It also reports 404s to the plugin's log and
// serves the site's root files (verification files and, with a backend that
// answers /_seo/api/v1/site, robots.txt, the sitemaps, llms.txt and the
// IndexNow key). An app consumes it with `extends: ['vue-seo-layer']`.
//
// Every path below is absolute and built from this file's directory: a
// relative or ~ path in a layer config resolves against the consuming
// project, not the layer. The layer's only module is its own local one
// (lib/seo-module.ts); it pulls in no package.

import { fileURLToPath } from 'node:url'

const currentDir = fileURLToPath(new URL('.', import.meta.url))

export default defineNuxtConfig({
  compatibilityDate: '2025-07-15',
  devtools: { enabled: false },

  modules: [`${currentDir}lib/seo-module.ts`],

  // Tokens first, then the base styles that use them (only .seo-* classes).
  // The app's own css array loads after these, so its overrides win.
  css: [`${currentDir}app/assets/css/seo-tokens.css`, `${currentDir}app/assets/css/seo-base.css`],

  runtimeConfig: {
    seo: {
      // Server-only base for SSR calls (NUXT_SEO_API_BASE). It never comes
      // from request input.
      apiBase: 'http://127.0.0.1:8096/_seo/api/v1',
      // Server-only origin of the Go binary for the root files
      // (NUXT_SEO_BACKEND_BASE). Empty: apiBase without /_seo/api/v1, so
      // http://127.0.0.1:8096 by default.
      backendBase: '',
      // Server-only bearer token of POST /notfound (NUXT_SEO_NOTFOUND_TOKEN),
      // the backend's golem15.seo.notfound_token. Empty: 404s are not
      // reported. Not under NUXT_SITE_: nuxt-site-config copies every
      // NUXT_SITE_* variable into the site config, which is published in
      // every page's payload.
      notfoundToken: '',
      // Server-only bearer token of the route report
      // (NUXT_SEO_ROUTE_REPORT_TOKEN). Empty: notfoundToken is used.
      routeReportToken: '',
      // How long a resolve call may take before the page renders without it
      // (NUXT_SEO_TIMEOUT_MS).
      timeoutMs: 1500,
      // Seconds a resolve answer stays in the layer's cache
      // (NUXT_SEO_RESOLVE_CACHE_TTL); the site cache purge clears it. 0
      // turns the cache off.
      resolveCacheTtl: 60,
    },
    // The shared site cache purge route POST /api/__site__/cache/purge
    // (moved here from the journal, menu and FAQ layers, same contract).
    cachePurge: {
      // Server-only bearer token (NUXT_CACHE_PURGE_TOKEN), the backend's
      // site_cache.purge_token. Shorter than 32 characters, the route
      // answers 404. Not under NUXT_SITE_: nuxt-site-config copies every
      // NUXT_SITE_* variable into the site config, which is published in
      // every page's payload.
      token: '',
      // NUXT_CACHE_PURGE_ALLOW_PROXIED: set it to true when the backend
      // reaches the site through a TLS-terminating proxy (an https
      // site_cache.purge_url on another host), which adds X-Forwarded-For,
      // X-Real-IP or Forwarded. The route then accepts proxied requests and
      // the bearer token is the only gate; unset, it answers 404 to any
      // proxied request.
      allowProxied: false,
    },
    // Deprecated (one release): the earlier names of cachePurge.token
    // (NUXT_SITE_CACHE_PURGE_TOKEN) and cachePurge.allowProxied
    // (NUXT_SITE_CACHE_ALLOW_PROXIED), read when the new ones are unset. The
    // layer's server/plugins/site-cache-purge.ts strips them from the site
    // config and logs a deprecation warning.
    siteCache: {
      purgeToken: '',
      allowProxied: false,
    },
    public: {
      seo: {
        // Same-origin base for browser navigations (NUXT_PUBLIC_SEO_API_BASE).
        // The site's proxy routes GET <base>/resolve to the backend; set it
        // to /api/__seo__ to resolve through the Nuxt server instead.
        apiBase: '/_seo/api/v1',
        // NUXT_PUBLIC_SEO_ENABLED=false turns the layer off: no resolve
        // calls, no head, no redirects, no root files, no 404 reports. The
        // module option seo.cms (NUXT_PUBLIC_SEO_CMS) is an alias.
        enabled: true,
      },
    },
  },

  // The layer's routes and the shared site routes are never route-cached.
  // Nitro wraps every handler matching an app rule such as '/**': { swr } in
  // its cached handler, which keys by path, does not skip POST and hides
  // request headers, so the purge route would answer from the cache without
  // running.
  routeRules: {
    '/api/__seo__/**': { cache: false },
    '/api/__site__/**': { cache: false },
  },
})