// Copies the production dictionary DAWGs into the build's app assets so a native (offline-first)
// install can obtain a dictionary with no network: the loader's bundled tier fetches
// ./dict/<dictKey>.dawg, where dictKey is "<variant>@<version>" (see lib/dict/store.ts). Run only in
// the native pipeline (after `pnpm build`, before `cap sync`); web builds skip it and stay slim.
//
// Source: DICT_DIR — the unpacked scrabble-dictionary release (scrabble-dawg-<DICT_VERSION>.tar.gz),
// the SAME set the backend image and CI consume, NOT the solver's committed test fixtures. The bundled
// version label comes from VITE_DICT_VERSION (default "dev") and MUST equal the client's __DICT_VERSION__
// so the loader requests the exact (variant, version) the file is named for. OUT_DIR overrides the
// output root (default `dist`) — the e2e build points it at dist-e2e.

import { existsSync, mkdirSync, copyFileSync } from 'node:fs';
import { join } from 'node:path';

const srcDir = process.env.DICT_DIR;
if (!srcDir) {
  console.error('bundle-dicts: DICT_DIR is required (the unpacked scrabble-dictionary release dir)');
  process.exit(1);
}
const version = process.env.VITE_DICT_VERSION || 'dev';
const outDir = join(process.env.OUT_DIR || 'dist', 'dict');

// The app's Variant enum value -> the release dawg file name (matches e2e-dict.mjs and the movegen
// parity mapping).
const dawgFor = {
  scrabble_en: 'en_sowpods',
  scrabble_ru: 'ru_scrabble',
  erudit_ru: 'ru_erudit',
};

mkdirSync(outDir, { recursive: true });
let copied = 0;
for (const [variant, file] of Object.entries(dawgFor)) {
  const src = join(srcDir, `${file}.dawg`);
  if (!existsSync(src)) {
    console.warn(`bundle-dicts: missing ${src} — the bundled tier will 404 for ${variant} (set DICT_DIR)`);
    continue;
  }
  copyFileSync(src, join(outDir, `${variant}@${version}.dawg`));
  copied++;
}
console.log(`bundle-dicts: copied ${copied}/${Object.keys(dawgFor).length} dawgs -> ${outDir} (version ${version})`);