// ── The UI kit's props, as core actually reads them ───────────────────────
//
// React drops an unknown prop without a word, so a UI-kit component called with
// the wrong one renders — just not what was written. Two of these have shipped
// from this org already: `PageHeader subtitle` (Teams phase 11, the kit's
// template) and `EmptyState title/message` (this module, phases 4 to 8 — every
// empty panel was a blank box until the presence fix's browser walk).
//
// A DOM-less runner cannot see a blank box, so this reads the source instead:
// it names the props core's components do NOT take and fails on any use of them.
// It is a claim about core that must be re-read when core's kit changes —
// written down rather than imported, because no core is in this process.

import test from 'node:test'
import assert from 'node:assert/strict'
import fs from 'node:fs'
import path from 'node:path'
import { fileURLToPath } from 'node:url'

const SRC = path.resolve(path.dirname(fileURLToPath(import.meta.url)), '..', 'src')

/** Every .jsx/.js under src/. */
function sources(dir = SRC) {
  return fs.readdirSync(dir, { withFileTypes: true }).flatMap((entry) => {
    const full = path.join(dir, entry.name)
    if (entry.isDirectory()) return sources(full)
    return /\.(jsx?|mjs)$/.test(entry.name) ? [full] : []
  })
}

// Core's `components/PageState.jsx` and `PageHeader.jsx`, read 2026-09-23 at the
// pinned core (ci/core-ref.json).
const REFUSED = {
  // `EmptyState({ children })` — children only.
  EmptyState: /<EmptyState\b[^>]*\b(title|message|description|text)\s*=/,
  // `PageHeader({ eyebrow, title, lead, center })` — there is no `subtitle`.
  PageHeader: /<PageHeader\b[^>]*\bsubtitle\s*=/,
}

test('no UI-kit component is handed a prop core does not read', () => {
  const offences = []
  for (const file of sources()) {
    const text = fs.readFileSync(file, 'utf8')
    for (const [component, pattern] of Object.entries(REFUSED)) {
      if (pattern.test(text)) offences.push(`${path.relative(SRC, file)}: ${component}`)
    }
  }
  assert.deepEqual(offences, [], 'use components/Empty.jsx for a titled empty state')
})