/**
 * Package-wide theme-contract guard (startsim-1f3n.3).
 *
 * A shared component may only use colors that packages/ui/theme/contract.css
 * guarantees — the SEMANTIC tokens (`primary`, `card`, `border`, `ring`, …).
 * The numeric Tailwind ramp (`bg-primary-600`, `text-primary-700`, …) is NOT
 * part of the contract, and Tailwind v4 emits no rule at all for a color it
 * has no `--color-*` entry for. That is how the Foundry control plane ended up
 * with an invisible "Invite member" button and a blank active-nav pill: the app
 * declares `--color-primary` and never declared the ramp.
 *
 * Requiring every app to also declare a ramp is the wrong fix — it makes N apps
 * responsible for a promise this package should not have made. So the ramp is
 * banned here instead, and this test keeps it out.
 *
 * Need a lighter/darker brand shade? Use an opacity modifier on the token:
 *   bg-primary-50  -> bg-primary/10        text-primary-700 -> text-primary
 *   hover:bg-primary-700 -> hover:bg-primary/90
 */

import * as fs from 'fs'
import * as path from 'path'

const SRC = path.resolve(__dirname, '..')

/** `bg-primary-600`, `hover:text-primary-700`, `focus:ring-primary-500`, … */
const PRIMARY_RAMP = /\b[a-z-]*-primary-\d{2,3}\b/

function sourceFiles(dir: string, acc: string[] = []): string[] {
  for (const entry of fs.readdirSync(dir, { withFileTypes: true })) {
    const full = path.join(dir, entry.name)
    if (entry.isDirectory()) {
      if (entry.name === '__tests__' || entry.name === 'node_modules') continue
      sourceFiles(full, acc)
    } else if (/\.tsx?$/.test(entry.name)) {
      acc.push(full)
    }
  }
  return acc
}

describe('packages/ui only uses colors the theme contract guarantees', () => {
  it('no component styles against the numeric primary ramp', () => {
    const offenders: string[] = []
    for (const file of sourceFiles(SRC)) {
      fs.readFileSync(file, 'utf8')
        .split('\n')
        .forEach((line, i) => {
          // Prose in a doc comment may legitimately name the banned class.
          const code = line.replace(/^\s*(\*|\/\/).*$/, '')
          const hit = code.match(PRIMARY_RAMP)
          if (hit) offenders.push(`${path.relative(SRC, file)}:${i + 1} ${hit[0]}`)
        })
    }
    expect(offenders).toEqual([])
  })
})