// Independent offline library replacement probe; no portal/account/network calls.
const fs = require('node:fs');
const path = require('node:path');

async function main() {
  if (process.argv.length !== 5) {
    throw new Error('Usage: node verify-replacement.cjs /path/glue.js /path/library.wasm /path/synthetic.step');
  }
  const [glue, wasm, model] = process.argv.slice(2).map(p => path.resolve(p));
  const initialize = require(glue);
  const importer = await initialize({
    wasmBinary: new Uint8Array(fs.readFileSync(wasm)),
    locateFile: () => wasm,
    print: () => {},
    printErr: () => {},
  });
  const result = importer.ReadStepFile(new Uint8Array(fs.readFileSync(model)), {
    linearUnit: 'millimeter', linearDeflectionType: 'bounding_box_ratio',
    linearDeflection: 0.001, angularDeflection: 0.5,
  });
  const triangles = (result.meshes || []).reduce((n, mesh) => n + (mesh.index?.array?.length || 0) / 3, 0);
  if (!result.success || !triangles) throw new Error('Replacement could not produce mesh triangles');
  console.log(JSON.stringify({success: true, meshes: result.meshes.length, triangles}));
}
main().catch(error => { console.error(error.message); process.exitCode = 1; });