// Runs whole + chunked over the corpus (or a directory), catching throws, and reports the failing inputs.
import fs from "node:fs";
import path from "node:path";
process.env.TYPESTRIP_ERASE_WASM ??= "build/erase.wasm";
const root = new URL("../..", import.meta.url).pathname.replace(/\/$/, "");
const { transformSync } = await import(root + "/src/index.js");
const { cases } = await import(root + "/test/corpus.mjs");

function* parts(src) {
  let seed = src.length;
  for (let i = 0; i < src.length; ) {
    seed = (seed * 1103515245 + 12345) & 0x7fffffff;
    const n = 1 + (seed % 4096);
    yield src.slice(i, i + n);
    i += n;
  }
}
function chunked(src) {
  let out = "";
  for (const piece of transformSync(parts(src))) out += piece;
  return out;
}
let n = 0, bad = 0;
const limit = Number(process.env.LIMIT ?? 10);
for (const { name, src } of cases({ only: process.argv[2] })) {
  n++;
  let got;
  try { got = transformSync(src); } catch (e) { console.log(`THREW whole: ${name}`); bad++; if (bad >= limit) break; continue; }
  try {
    const c = chunked(src);
    if (c !== got) { let j = 0; while (got[j] === c[j]) j++; console.log(`DIFF chunked: ${name} at ${j}: ${JSON.stringify(c.slice(Math.max(0, j - 30), j + 30))} vs ${JSON.stringify(got.slice(Math.max(0, j - 30), j + 30))}`); bad++; }
  } catch (e) { console.log(`THREW chunked: ${name}`); bad++; }
  if (bad >= limit) break;
}
console.log(`${n} inputs, ${bad} bad`);