// Clears the SEO layer's caches after every successful site cache purge,
// whichever layer's copy of POST /api/__site__/cache/purge answered it.
//
// vue-journal-layer, vue-menu-layer and vue-faq-layer ship their own copy of
// the shared purge route until they extend this layer, and Nitro keeps one
// handler per route and method, so in an app that extends several of them
// this layer's route (which clears the caches itself) may not be the one
// that runs. The journal's deprecated POST /api/__journal__/cache/purge
// purges the route cache too, so it clears them as well. Clearing twice is
// harmless.

import { clearSeoCaches } from '../lib/resolve.ts'

const PURGE_PATHS = new Set(['/api/__site__/cache/purge', '/api/__journal__/cache/purge'])

export default defineNitroPlugin((nitroApp) => {
  nitroApp.hooks.hook('afterResponse', (event) => {
    if (event.method !== 'POST') return
    if (!PURGE_PATHS.has((event.path.split('?')[0] ?? '').replace(/\/+$/, ''))) return
    if (event.node.res.statusCode === 200) clearSeoCaches()
  })
})