#!/usr/bin/env node
// Cut ONE clip out of the window already on disk.
//
//   node bin/cut-from-cache.mjs --project <id> --clip <id> [--reencode|--no-reencode]
//
// A CLI so the Deliver panel's "cut the confirmed clips" can be ONE job with
// one step per clip: lib/jobs.ts then owns the sequencing, the `k of n` the UI
// reads off stepIndex, the timeout, and a Stop that kills the process group
// rather than a promise nobody can interrupt. A loop inside a request handler
// would have had to reinvent all four.
//
// Never fetches. A clip with no containing window exits 3 and says so, which
// is a fact about the cache and not a failure of the cut.
import process from "node:process";
import { resolveProject } from "../lib/projects/core.mjs";
import { cutClipFromCache } from "../lib/report/cut.mjs";

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

const projectArg = val("--project");
const clipId = val("--clip");
if (!projectArg || !clipId) {
  console.error("usage: cut-from-cache.mjs --project <id> --clip <id> [--reencode|--no-reencode]");
  process.exit(2);
}

const r = await resolveProject(projectArg);
if (!r.project) {
  console.error(`no project matches "${projectArg}"`);
  process.exit(2);
}

const reencode = argv.includes("--reencode")
  ? "always"
  : argv.includes("--no-reencode")
    ? "never"
    : "auto";

// TEST-ONLY PACING, and the only reason it exists: a cut of a cached window is
// about a second of ffmpeg, which is too fast for a spec to press Stop in the
// middle of -- and "Stop abandons the REST, and the next run resumes rather
// than re-cutting" is the whole argument for one step per clip. The e2e
// fixture's server sets this; nothing else ever should.
const delay = Number(process.env.E2E_UMTOOL_CUT_DELAY_MS ?? 0);
if (delay > 0) await new Promise((r) => setTimeout(r, delay));

const res = await cutClipFromCache(r.project, clipId, { reencode });
if (!res.ok) {
  console.error(`${clipId}: ${res.error}`);
  // 3 is "nothing on disk holds this clip", which the panel already lists
  // under its own heading with a fetch link. Every other failure is a 1.
  process.exit(res.reason === "not-fetched" ? 3 : 1);
}
console.log(
  `CUT-OK ${res.id} ${res.seconds?.toFixed(2)}s (wanted ${res.want.toFixed(2)}s) ` +
    `${res.mode} from ${res.window.name}`,
);