#!/usr/bin/env node
// E2E fake whisper-cli. Mimics the args runWhisperBatch passes:
//   whisper-cli -ojf -l en -m <model> -of <tmpBase> <audioFilename>
// Writes <tmpBase>.json next to cwd (which runWhisperBatch sets to the
// video dir). Format matches what common/lib/whisper.ts parses.
import { writeFile } from "node:fs/promises";
import { installFixtureWatchdog } from "./_watchdog.mjs";

// Never outlive the run that spawned us — see _watchdog.mjs.
installFixtureWatchdog();

const argv = process.argv.slice(2);
function arg(flag) {
  const i = argv.indexOf(flag);
  return i < 0 ? undefined : argv[i + 1];
}

const tmpBase = arg("-of");
const audio = argv[argv.length - 1];
if (!tmpBase) {
  process.stderr.write(`[fake-whisper] missing -of\n`);
  process.exit(2);
}

const sleep = (ms) => new Promise((resolve) => setTimeout(resolve, ms));
const pad = (n) => String(n).padStart(2, "0");
const clock = (s) => `00:${pad(Math.floor(s / 60))}:${pad(s % 60)}.000`;

// Videos whose dir (== video id) contains the SLOWOP marker emit whisper-style
// progress output with real delays, so the per-operation progress bars and
// drain (soft-cancel) behaviour can be observed on the Active Jobs screen.
// Videos without the marker stay instant so the rest of the suite is fast.
if (process.cwd().toLowerCase().includes("slowop")) {
  const totalSec = 50;
  process.stdout.write(
    `main: processing '${audio}' (800000 samples, ${totalSec}.0 sec), 4 threads, 1 processors, 5 beams + best of 5, lang = en, task = transcribe, timestamps = 1 ...\n`,
  );
  for (let t = 5; t <= totalSec; t += 5) {
    process.stdout.write(
      `[${clock(t - 5)} --> ${clock(t)}]   slow whisper segment ${t}\n`,
    );
    await sleep(700);
  }
}

const doc = {
  systeminfo: "fake",
  model: { type: "fake" },
  result: { language: "en" },
  transcription: [
    {
      offsets: { from: 0, to: 5000 },
      text: `Synthetic whisper output for ${audio} #1`,
    },
    {
      offsets: { from: 5000, to: 10000 },
      text: `Synthetic whisper output for ${audio} #2`,
    },
  ],
};

const outPath = `${tmpBase}.json`;
await writeFile(outPath, JSON.stringify(doc));
process.stdout.write(`[fake-whisper] wrote ${outPath}\n`);