import { readdirSync, statSync } from 'node:fs'
import { extname, resolve } from 'node:path'

const assets = resolve('dist/assets')
const limits = new Map([
  ['.js', 256 * 1024],
  ['.css', 64 * 1024],
])
const totals = new Map()
for (const entry of readdirSync(assets)) {
  const extension = extname(entry)
  if (!limits.has(extension)) continue
  totals.set(
    extension,
    (totals.get(extension) ?? 0) + statSync(resolve(assets, entry)).size,
  )
}
for (const [extension, limit] of limits) {
  const total = totals.get(extension) ?? 0
  if (total > limit)
    throw new Error(
      `${extension.slice(1).toUpperCase()} bundle is ${total} bytes; limit is ${limit}`,
    )
}