/**
 * CLEAN GROUND tells a GM how long a fight takes, and every figure it had was a median.
 *
 * A median is what the suite could see: fourteen guards averaged, so none of them could
 * have said that one six-a-side fight in five runs past twenty rounds, or that a fight
 * still going at fifteen is one the party is losing. Those are the sentences EXPOSURE now
 * prints, and this is what keeps them true.
 *
 * Thin on purpose: the measurement lives in fight-tail.mjs, which is also the tool a
 * reader runs, so the guard and the reading cannot drift apart.
 */
import { spawnSync } from "node:child_process";

const r = spawnSync(process.execPath, [new URL("fight-tail.mjs", import.meta.url).pathname, "--check"],
                    { encoding: "utf8" });

if (r.status !== 0) {
  process.stdout.write(r.stdout ?? "");
  process.stderr.write(r.stderr ?? "");
  console.error("check-fight-tail: FAILED — these fights no longer run the length CLEAN GROUND "
    + "says they do. Read `node tools/fight-tail.mjs` before re-recording.");
  process.exit(1);
}
// update-readme reads the line beginning with this file's own name.
const m = r.stdout.match(/wipes the party ([\d.]+)x as often in the cut and ([\d.]+)x at six a side/) ?? [];
console.log(`check-fight-tail: OK — a fight past 15 rounds wipes the party ${m[1] ?? "?"}x as often in `
  + `the four-player cut and ${m[2] ?? "?"}x at six a side, and nothing was truncated`);