import { readdirSync, statSync } from 'node:fs'
import { basename, join } from 'node:path'

const assetsDir = join(process.cwd(), 'dist', 'assets')
const files = readdirSync(assetsDir)
const entry = files.find(file => /^index-[^/]+\.js$/.test(file))
const detailSlugs = ['posts', 'kniepunkt'].flatMap(type =>
  readdirSync(join(process.cwd(), 'content', type))
    .filter(file => file.endsWith('.md'))
    .map(file => basename(file, '.md')),
)
const missingDetailChunks = detailSlugs.filter(
  slug => !files.some(file => file.startsWith(`${slug}-`) && file.endsWith('.js')),
)
const maxInitialBytes = 400 * 1024

if (!entry) throw new Error('Kein initialer JavaScript-Entry-Chunk gefunden.')
if (missingDetailChunks.length > 0) {
  throw new Error(`Fehlende Content-Detail-Chunks: ${missingDetailChunks.join(', ')}`)
}

const entryBytes = statSync(join(assetsDir, entry)).size
if (entryBytes > maxInitialBytes) {
  throw new Error(`Initialer JS-Chunk ist zu groß: ${entryBytes} Bytes (Limit ${maxInitialBytes}).`)
}

console.log(`Bundle-Prüfung: ${entry}=${entryBytes} Bytes, Detail-Chunks=${detailSlugs.length}`)