// Converts 3MF files to GLB via the Python/trimesh sidecar, so the browser can
// render Bambu/MakerWorld production-extension 3MFs (which the JS 3MFLoader can't).

const { runScript } = require('./python');

// Returns { glb, volume_cm3, bbox, faces } or throws.
async function convert3mfToGlb(inputPath, outputPath) {
  const { err, stdout, stderr } = await runScript('convert_3mf.py', [inputPath, outputPath], { timeout: 120000 });
  let result = null;
  try {
    result = JSON.parse(stdout.trim().split('\n').pop());
  } catch { /* handled below */ }
  if (result && result.error) throw new Error(result.error);
  if (err) {
    if (err.killed) throw new Error('Timed out converting this 3MF for preview.');
    throw new Error(stderr ? stderr.trim().split('\n').slice(-3).join(' ') : err.message);
  }
  if (!result) throw new Error('Converter returned unparseable output.');
  return result;
}

module.exports = { convert3mfToGlb };