#!/usr/bin/env node
/**
 * Verifies that every translation key exists in every language, in both
 * directions. Run via `pnpm i18n:check`; requires @dorfteich/shared to be
 * built (`pnpm build`) because it imports the shared tooling helpers.
 */
import { readdirSync, readFileSync } from 'node:fs';
import path from 'node:path';
import { fileURLToPath } from 'node:url';

import { missingTranslationKeys } from '../packages/shared/dist/index.mjs';

const i18nDir = path.join(path.dirname(fileURLToPath(import.meta.url)), '../packages/shared/i18n');
const languages = readdirSync(i18nDir).sort();

if (languages.length < 2) {
  console.error(`i18n:check: expected at least two languages in ${i18nDir}`);
  process.exit(1);
}

const namespaces = new Set(languages.flatMap((lang) => readdirSync(path.join(i18nDir, lang))));

let problems = 0;
for (const namespaceFile of [...namespaces].sort()) {
  const trees = {};
  for (const lang of languages) {
    try {
      trees[lang] = JSON.parse(readFileSync(path.join(i18nDir, lang, namespaceFile), 'utf8'));
    } catch {
      console.error(`✗ ${lang}/${namespaceFile}: missing or invalid JSON`);
      problems += 1;
      trees[lang] = {};
    }
  }
  for (const reference of languages) {
    for (const candidate of languages) {
      if (reference === candidate) continue;
      for (const key of missingTranslationKeys(trees[reference], trees[candidate])) {
        console.error(
          `✗ ${candidate}/${namespaceFile}: missing key "${key}" (present in ${reference})`,
        );
        problems += 1;
      }
    }
  }
}

if (problems > 0) {
  console.error(`i18n:check: ${problems} problem(s) found.`);
  process.exit(1);
}
console.log(`i18n:check: ${languages.join(', ')} — all keys present in all languages.`);