Made of little things.

// Checks the radio clips are pronounced properly: decodes each clip exactly as the game stores
// it (8 kHz ADPCM), has Whisper (whisper.cpp, offline speech recognition) transcribe it, and
// compares the words with the script. A mispronounced word usually gets misheard.
//
//   bun tools/voices/verify.ts
//
// Needs ~/.cache/whisper-dl/bin/Release/whisper-cli.exe (github.com/ggml-org/whisper.cpp
// releases) and ~/.cache/whisper-dl/ggml-small.en.bin (huggingface.co/ggerganov/whisper.cpp).
import { mkdirSync, readFileSync, rmSync } from 'node:fs';
import { join, resolve } from 'node:path';
import { decodeAdpcm } from '../../src/game/adpcm.ts';
import index from '../../src/game/radio-index.json';
import { CLIPS } from '../../src/game/radio-script.ts';
import { transcribe, wordErrors, words, writeWav16k } from './asr.ts';

const work = resolve('tools/voices/.verify');
rmSync(work, { recursive: true, force: true });
mkdirSync(work, { recursive: true });
const bytes = new Uint8Array(readFileSync('src/assets/radio-voices.bin'));
const clips = index.clips as Record<string, number[]>;
// A line added to the script but not yet rendered plays as silence in the game.
const unrecorded = Object.keys(CLIPS).filter((key) => !clips[key]);
if (unrecorded.length) {
  console.log(`✗ ${unrecorded.length} clip(s) in radio-script.ts have no recording; run bun tools/voices/build.ts:`);
  console.log('  ' + unrecorded.join(' '));
  process.exit(1);
}
let totalWords = 0, totalErrors = 0;
const problems: string[] = [];
for (const [key, clip] of Object.entries(CLIPS)) {
  const [offset, count] = clips[key];
  const file = join(work, key.replace(/[^a-z0-9.]+/gi, '_') + '.wav');
  writeWav16k(file, decodeAdpcm(bytes, offset, count), index.rate);
  const heard = transcribe(file);
  const want = words(clip.show ?? clip.say);
  const got = words(heard);
  const errors = wordErrors(want, got);
  totalWords += want.length;
  totalErrors += errors;
  console.log(`${errors ? '✗' : '✓'} ${key.padEnd(13)} ${heard}`);
  if (errors) problems.push(`${key}: expected "${want.join(' ')}"\n${' '.repeat(key.length + 2)}heard    "${got.join(' ')}"`);
}
rmSync(work, { recursive: true, force: true });
console.log(`\n${Object.keys(CLIPS).length} clips, ${totalWords} words, ${totalErrors} word differences (${((totalErrors / totalWords) * 100).toFixed(1)}%)`);
if (problems.length) console.log('\nDifferences to review:\n' + problems.join('\n'));