#!/usr/bin/env node
/**
 * CI: forbid incomplete-implementation markers in first-party kernel + booter runtime sources only.
 *
 * Scanned: kernel/init.js, kernel/lib/init/init-main.js, all kernel/lib/boot/*.js, kernel/bin/*.js (walk skips bundles),
 * packages/bare-os-coreutils/src (`.js` + `.mjs` Tier-1 sources that ship into `/bin`),
 * packages/bare-os-booter/index.js, packages/bare-os-booter/lib (recursive .js),
 * packages/bare-os-protocol/lib (recursive .js; protocol constants only).
 * Not scanned: kernel/lib/bare/bundles (vendored IIFEs — verify-bundle-markers.mjs,
 * verify-bundle-throws.mjs, docs/audit allowlists). See developer-guide/node-to-bare-modules.md.
 */
import fs from 'node:fs'
import path from 'node:path'
import process from 'node:process'
import { fileURLToPath } from 'node:url'

const root = path.resolve(path.dirname(fileURLToPath(import.meta.url)), '..')
const excludeConfigPath = path.join(
  root,
  'docs/audit/runtime-marker-excludes.json'
)

const MARKER_RE = /\b(TODO|FIXME|HACK|XXX)\b/
const NOT_IMPLEMENTED_RE = /throw\s+new\s+Error\s*\(\s*['"]Not implemented['"]\s*\)/

/** @param {string} dir */
/** @param {string[]} [exts] */
function walk(dir, exts = ['.js']) {
  /** @type {string[]} */
  const out = []
  if (!fs.existsSync(dir)) return out
  for (const ent of fs.readdirSync(dir, { withFileTypes: true })) {
    const p = path.join(dir, ent.name)
    if (ent.isDirectory()) {
      if (ent.name === 'bundles') continue
      if (ent.name === 'node_modules') continue
      out.push(...walk(p, exts))
    } else if (ent.isFile()) {
      const ext = path.extname(ent.name)
      if (exts.includes(ext)) out.push(p)
    }
  }
  return out
}

function loadExcludePrefixes() {
  try {
    const raw = fs.readFileSync(excludeConfigPath, 'utf8')
    const j = JSON.parse(raw)
    const p = Array.isArray(j.pathPrefixes) ? j.pathPrefixes : []
    return p
      .map((s) => String(s || '').replace(/\//g, path.sep))
      .filter(Boolean)
  } catch {
    return []
  }
}

/**
 * @param {string} rel
 * @param {string[]} excludePrefixes
 */
function shouldSkipFile(rel, excludePrefixes) {
  if (rel.startsWith(`packages${path.sep}bare-os-booter${path.sep}test`))
    return true
  if (rel === `packages${path.sep}bare-os-booter${path.sep}test.js`) return true
  if (rel.includes(`${path.sep}bundles${path.sep}`)) return true
  for (const pre of excludePrefixes) {
    if (rel === pre || rel.startsWith(pre + path.sep)) return true
  }
  return false
}

function main() {
  const excludePrefixes = loadExcludePrefixes()
  const files = [
    path.join(root, 'kernel', 'init.js'),
    path.join(root, 'kernel', 'lib', 'init', 'init-main.js'),
    ...walk(path.join(root, 'kernel', 'lib', 'init', 'fragments')),
    ...walk(path.join(root, 'kernel', 'lib', 'boot')),
    ...walk(path.join(root, 'kernel', 'bin')),
    ...walk(path.join(root, 'packages', 'bare-os-coreutils', 'src'), [
      '.js',
      '.mjs'
    ]),
    ...walk(path.join(root, 'packages', 'bare-os-booter', 'lib')),
    ...walk(path.join(root, 'packages', 'bare-os-protocol', 'lib')),
    path.join(root, 'packages', 'bare-os-booter', 'index.js')
  ]

  /** @type {string[]} */
  const bad = []
  for (const abs of files) {
    if (!fs.existsSync(abs)) continue
    const rel = path.relative(root, abs)
    if (shouldSkipFile(rel, excludePrefixes)) continue
    const txt = fs.readFileSync(abs, 'utf8')
    for (let i = 0; i < txt.length; i++) {
      const slice = txt.slice(i, i + 200)
      const m = slice.match(MARKER_RE)
      if (m) {
        const line = txt.slice(0, i).split('\n').length
        bad.push(`${rel}:${line}:${m[0]}`)
        break
      }
    }
    const ni = txt.match(NOT_IMPLEMENTED_RE)
    if (ni && ni.index != null) {
      const line = txt.slice(0, ni.index).split('\n').length
      bad.push(`${rel}:${line}:throw new Error(\"Not implemented\")`)
    }
  }

  if (bad.length) {
    console.error(
      'verify-runtime-no-incomplete-markers: incomplete markers in runtime sources:'
    )
    for (const b of bad) console.error(' ', b)
    process.exit(1)
  }
  console.log('verify-runtime-no-incomplete-markers: OK')
}

main()