/**
 * cli:derive-permission-floor — menu-nodes.ts
 *
 * Menu-tree readers: the floor derives from the FOLDER TREE (Application →
 * Module → Section → Resource, each node a folder holding index.md), the same
 * source scaffold-core-seed's Phase 0 seeds from. Folder → nav code follows
 * the create-rbac normalization: lowercase, `UPPERCASE_SNAKE` → kebab.
 */
import { readdirSync } from 'node:fs'
import { join } from 'node:path'
import { listSections } from '../derive-lookup-grants/rbac-rows.js'

export { listSections }

/** `HR_PORTAL` → `hr-portal` — the create-rbac path normalization. */
export function navCodeOf(folder: string): string {
  return folder.toLowerCase().replace(/_/g, '-')
}

/**
 * Resource folders of a section — lower-kebab directories under
 * `<baRoot>/<APP>/<MODULE>/<section>/` (same filter as listSections:
 * `_`/`.` prefixes are workflow folders).
 */
export function listResources(
  baRoot: string,
  app: string,
  module: string,
  section: string,
): string[] {
  const sectionDir = join(baRoot, app, module, section)
  let entries
  try {
    entries = readdirSync(sectionDir, { withFileTypes: true })
  } catch {
    return []
  }
  return entries
    .filter(
      (e) =>
        e.isDirectory() &&
        !e.name.startsWith('_') &&
        !e.name.startsWith('.') &&
        /^[a-z]/.test(e.name),
    )
    .map((e) => e.name)
    .sort()
}