#!/usr/bin/env bun
// Checks the desktop app's UI catalogs (apps/desktop/src/i18n): every language has exactly the English keys, no empty
// message, the same {placeholders} as English, plural "_one" entries only next to their base key and with {count} or
// a literal 1, no em dash (the house style uses "·"), no stray markup. Part of `bun run ci`.
//   bun tools/i18n-check.ts
import { en } from '../apps/desktop/src/i18n/en';
import { tr } from '../apps/desktop/src/i18n/tr';

export type Catalog = Record<string, string>;
const placeholders = (s: string): string[] => [...s.matchAll(/\{(\w+)\}/g)].map(m => m[1]!).sort();

export function checkCatalogs(source: Catalog, others: Record<string, Catalog>): string[] {
  const errors: string[] = [];
  const keys = Object.keys(source);
  for (const [k, v] of Object.entries(source)) {
    if (!v.trim()) errors.push(`en: ${k} is empty`);
    if (k.endsWith('_one') && !(k.slice(0, -4) in source)) errors.push(`en: ${k} has no base key`);
  }
  for (const [lang, cat] of Object.entries({ en: source, ...others })) {
    for (const k of keys) if (!(k in cat)) errors.push(`${lang}: missing ${k}`);
    for (const [k, v] of Object.entries(cat)) {
      if (!(k in source)) { errors.push(`${lang}: unknown key ${k}`); continue; }
      if (!v.trim()) errors.push(`${lang}: ${k} is empty`);
      if (/—/.test(v)) errors.push(`${lang}: ${k} has an em dash (use "·")`);
      if (/<[a-z/][^>]*>/i.test(v)) errors.push(`${lang}: ${k} has markup`);
      if (/[\u0000-\u0008\u000b-\u001f]/.test(v)) errors.push(`${lang}: ${k} has control characters`);
      const want = placeholders(source[k]!), got = placeholders(v);
      if (k.endsWith('_one')) {
        // a "one" form may spell the count out ("1 app") instead of using {count}
        const base = placeholders(source[k.slice(0, -4)]!).filter(p => p !== 'count');
        if (got.filter(p => p !== 'count').join() !== base.join()) errors.push(`${lang}: ${k} placeholders ${got.join(',')} differ from ${base.join(',')}`);
      } else if (got.join() !== want.join()) errors.push(`${lang}: ${k} placeholders {${got.join('},{')}} differ from English {${want.join('},{')}}`);
    }
  }
  return errors;
}

if (import.meta.main) {
  const errors = checkCatalogs(en, { tr });
  if (errors.length) { console.error(errors.join('\n')); console.error(`i18n: ${errors.length} problem(s)`); process.exit(1); }
  console.log(`i18n: en + tr, ${Object.keys(en).length} messages, placeholders match`);
}