#!/usr/bin/env node
/**
 * check-tokens.js
 *
 * Counts hardcoded hex color literals in sx props / color attributes
 * across src/components and src/pages. Fails (exit 1) if count exceeds THRESHOLD.
 *
 * Usage:
 *   node scripts/check-tokens.js           — report + fail if > threshold
 *   node scripts/check-tokens.js --report  — report only, always exits 0
 *
 * Run via:  npm run check:tokens
 */

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

// Hex literals allowed before CI blocks the build.
// This is a ratchet — lower it as migration progresses. Never raise it.
// Baseline after initial token migration (2026-05-24): 1958
// Nach der Token-Migration aller Farb-Properties (bgcolor/color/borderColor/
// background/fill/stroke): 925. Die verbleibenden Treffer stehen in
// Farbverläufen, `rgba()`-Werten, Icon-Attributen und Datentabellen, die diese
// Zählung mitnimmt, die ESLint-Regel aber nicht erfasst.
const THRESHOLD = 925

const HEX_PATTERN = /#[0-9A-Fa-f]{3,8}\b/g

const SEARCH_DIRS = ['src/components', 'src/pages']

function walk(dir) {
  const files = []
  for (const entry of readdirSync(dir, { withFileTypes: true })) {
    const full = join(dir, entry.name)
    if (entry.isDirectory()) files.push(...walk(full))
    else if (entry.isFile() && ['.ts', '.tsx'].includes(extname(entry.name))) files.push(full)
  }
  return files
}

const reportOnly = process.argv.includes('--report')
const cwd = process.cwd()

let totalViolations = 0
const fileViolations = []

for (const searchDir of SEARCH_DIRS) {
  const dir = join(cwd, searchDir)
  for (const file of walk(dir)) {
    const content = readFileSync(file, 'utf8')
    const matches = content.match(HEX_PATTERN)
    if (matches && matches.length > 0) {
      totalViolations += matches.length
      fileViolations.push({ file: file.replace(cwd + '\\', '').replace(cwd + '/', ''), count: matches.length })
    }
  }
}

fileViolations.sort((a, b) => b.count - a.count)

console.log('\n── Token Compliance Check ───────────────────────────────────────────')
console.log(`Total hex violations: ${totalViolations}  (threshold: ${THRESHOLD})`)
console.log(`Status: ${totalViolations <= THRESHOLD ? '✅ PASS' : '❌ FAIL'}`)
console.log('\nTop 15 offenders:')
fileViolations.slice(0, 15).forEach(({ file, count }) => {
  console.log(`  ${count.toString().padStart(3)}  ${file}`)
})
console.log('─────────────────────────────────────────────────────────────────────\n')

if (!reportOnly && totalViolations > THRESHOLD) {
  console.error(`Error: ${totalViolations} hex violations exceed threshold of ${THRESHOLD}.`)
  console.error('Run `node scripts/check-tokens.js --report` to see the full list.')
  process.exit(1)
}