// ════════════════════════════════════════════
// REPLACE the existing make3D() function with this one.
// Also replace pollCloud() with the updated version below.
// ════════════════════════════════════════════

async function make3D() {
  if (!conceptUrl && !conceptB64) { toast('No concept image'); return; }

  let btn = G('btnMake3D');
  btn.disabled = true;
  btn.textContent = '⏳ Submitting to Forge...';
  showStatus('Sending to ' + (ENGINE_NAMES[curEngine]||curEngine) + '...');

  let fd = new FormData();

  if (curEngine === 'trellis2')       fd.append('action', 'generate_trellis');
  else if (curEngine === 'hunyuan3d') fd.append('action', 'generate_hunyuan');
  else if (curEngine === 'tripo')   { fd.append('action', 'generate_tripo'); fd.append('mode', 'image'); }
  else if (curEngine === 'meshy')   { fd.append('action', 'generate_meshy'); fd.append('mode', 'image'); }

  if (conceptB64) {
    let resp = await fetch(conceptB64);
    let blob = await resp.blob();
    fd.append('image', blob, 'concept.png');
  } else if (conceptUrl) {
    fd.append('image_url', conceptUrl);
  }

  fd.append('prompt', conceptPrompt || '');
  fd.append('poly_count', G('polySlider').value);
  fd.append('texture_size', G('texSize').value);

  try {
    let resp = await fetch('3d-api.php', {method:'POST', body: fd});
    let text = await resp.text();

    let data;
    try {
      data = JSON.parse(text);
    } catch(e) {
      console.error('3d-api.php returned non-JSON:', text.substring(0, 500));
      hideStatus(); btn.disabled=false; btn.textContent='✅ Approve & Generate 3D Model';
      toast('❌ Server error — check console');
      return;
    }

    // ── LOCAL ENGINES: got job_id → poll ──
    if (data.success && data.job_id) {
      toast('✅ Job submitted! Rendering on Mac...');
      btn.textContent = '⏳ Rendering 3D...';
      pollLocalJob(data.job_id, data.prompt || conceptPrompt, btn);
      return;
    }

    // ── CLOUD ENGINES: got task_id → poll cloud ──
    if (data.success && data.task_id) {
      toast('⏳ Cloud generation started — polling...');
      btn.disabled = false;
      btn.textContent = '✅ Approve & Generate 3D Model';
      pollCloud(data.engine, data.task_id);
      backToStep1();
      return;
    }

    // ── DIRECT RESULT (shouldn't happen now but fallback) ──
    if (data.success) {
      hideStatus();
      btn.disabled = false;
      btn.textContent = '✅ Approve & Generate 3D Model';
      toast('✅ 3D model generated!');
      let url = data.local_path || data.download_url;
      if (url) loadModel(url, data);
      switchTab('viewer');
      backToStep1();
      return;
    }

    // ── ERROR ──
    hideStatus();
    btn.disabled = false;
    btn.textContent = '✅ Approve & Generate 3D Model';
    toast('❌ ' + (data.error || 'Generation failed'));
    console.error('3D gen error:', data);

  } catch(e) {
    hideStatus(); btn.disabled=false; btn.textContent='✅ Approve & Generate 3D Model';
    toast('❌ Connection failed — is the Forge engine online?');
    console.error('Fetch error:', e);
  }
}


// ════════════════════════════════════════════
// POLL LOCAL JOB (TRELLIS / Hunyuan on Mac)
// Polls every 5s for up to 30 min
// ════════════════════════════════════════════

async function pollLocalJob(jobId, prompt, btn) {
  showStatus('Rendering 3D model on Mac... (this takes 3-8 min)');

  for (let i = 0; i < 360; i++) {  // 360 × 5s = 30 min max
    await new Promise(r => setTimeout(r, 5000));
    try {
      let url = '3d-api.php?action=check_local_job&job_id=' + encodeURIComponent(jobId);
      if (prompt) url += '&prompt=' + encodeURIComponent(prompt);
      let resp = await fetch(url);
      let data = await resp.json();

      if (data.status === 'complete' && data.result) {
        hideStatus();
        btn.disabled = false;
        btn.textContent = '✅ Approve & Generate 3D Model';
        toast('✅ 3D model generated!');
        let dlUrl = data.result.download_url || data.result.local_path || '';
        if (dlUrl) loadModel(dlUrl, data.result);
        switchTab('viewer');
        backToStep1();
        return;
      }

      if (data.status === 'failed') {
        hideStatus();
        btn.disabled = false;
        btn.textContent = '✅ Approve & Generate 3D Model';
        toast('❌ ' + (data.error || 'Generation failed'));
        return;
      }

      // Still processing — update timer
      let elapsed = (i + 1) * 5;
      let mins = Math.floor(elapsed / 60);
      let secs = elapsed % 60;
      G('statusText').textContent = 'Rendering 3D model... ' + mins + 'm ' + secs + 's';

    } catch(e) {
      // Network glitch — keep polling, don't give up
      console.warn('Poll error (will retry):', e.message);
    }
  }

  hideStatus();
  btn.disabled = false;
  btn.textContent = '✅ Approve & Generate 3D Model';
  toast('⏰ Timed out after 30 min — check Gallery later');
}


// ════════════════════════════════════════════
// POLL CLOUD (Meshy / Tripo — unchanged logic)
// ════════════════════════════════════════════

async function pollCloud(engine, taskId) {
  showStatus('Cloud processing...');
  let checkAction = engine === 'meshy' ? 'check_meshy' : 'check_tripo';

  for (let i = 0; i < 60; i++) {
    await new Promise(r => setTimeout(r, 5000));
    try {
      let resp = await fetch('3d-api.php?action=' + checkAction + '&task_id=' + taskId);
      let data = await resp.json();
      let status = engine === 'meshy' ? (data.data?.status||'') : (data.data?.data?.status||'');

      if (status === 'SUCCEEDED' || status === 'success') {
        hideStatus();
        let url = engine === 'meshy' ? (data.data?.model_urls?.glb||'') : (data.data?.data?.model?.glb?.url||'');
        if (url) { loadModel(url, {engine}); switchTab('viewer'); }
        toast('✅ Done!');
        return;
      } else if (status === 'FAILED' || status === 'failed') {
        hideStatus(); toast('❌ Cloud generation failed'); return;
      }
      G('statusText').textContent = 'Cloud processing... (' + (i*5) + 's)';
    } catch(e) {}
  }
  hideStatus(); toast('⏰ Timed out — check Gallery later');
}