const fs = require('fs');
const path = require('path');
const root = 'src';
const exts = ['.tsx', '.ts', '.jsx', '.js'];
const excludeDirs = ['locales', 'node_modules', 'i18n'];
function walk(dir) {
  const out = [];
  for (const e of fs.readdirSync(dir, { withFileTypes: true })) {
    const full = path.join(dir, e.name);
    if (e.isDirectory()) { if (!excludeDirs.includes(e.name)) out.push(...walk(full)); }
    else if (exts.includes(path.extname(e.name))) out.push(full);
  }
  return out;
}
function load(p) {
  let s = fs.readFileSync(p, 'utf8');
  s = s.replace(/const\s+\w+\s*=\s*\{/, 'var obj = {');
  s = s.replace(/export\s+default\s+\w+;?/, '');
  s = s.replace(/\bconst\b/g, 'var');
  return new Function(s + '\nreturn obj;')();
}
function flat(o, p, r) { p = p || ''; r = r || {}; for (const k of Object.keys(o)) { const key = p ? p + '.' + k : k; if (o[k] && typeof o[k] === 'object' && !Array.isArray(o[k])) flat(o[k], key, r); else r[key] = o[k]; } return r; }

const zhMap = flat(load('src/locales/zh/index.ts'));
const enMap = flat(load('src/locales/en/index.ts'));

const refRegex = /(?:i18n\.t|[^a-zA-Z]t)\(\s*['"`]([a-zA-Z][a-zA-Z0-9_.]*?)['"`]/g;
const files = walk(root);
const refKeys = new Set();
for (const f of files) {
  const c = fs.readFileSync(f, 'utf8');
  let m; while ((m = refRegex.exec(c))) refKeys.add(m[1]);
}
let missZh = [], missEn = [], missBoth = [];
for (const k of refKeys) {
  if (!(k in zhMap)) missZh.push(k);
  if (!(k in enMap)) missEn.push(k);
  if (!(k in zhMap) && !(k in enMap)) missBoth.push(k);
}
console.log('Referenced unique keys:', refKeys.size);
console.log('Missing in ZH:', missZh.length);
console.log('Missing in EN:', missEn.length);
console.log('Missing in BOTH:', missBoth.length);
if (missBoth.length) console.log('SAMPLE missing-both:', missBoth.slice(0, 20).join(', '));