/** Actual GraphPage/React Flow + IndexedDB probe; fixture HTTP server, not production service. */
import assert from 'node:assert/strict';
import {writeFile} from 'node:fs/promises';
import {setTimeout as pause} from 'node:timers/promises';
import {canvasTransform,toWorld} from '../../src/lib/canvas-core/coordinates.ts';

export async function measureRenderer({call,evaluate,documents,root,partition,count,exceptions,reportPath,browserLogs=()=>'',baseline}){
  const target=2*count+3,started=Date.now(),heapSamples=[];let copying=false,nextHeap=0;
  const wait=async(expression,label)=>{const deadline=Date.now()+240000;while(Date.now()<deadline){if(exceptions.length)throw Error(exceptions.join('\n'));if(copying&&process.env.HEADLESS_PERFORMANCE_HEAP==='1'&&Date.now()>=nextHeap){const heap=await call('Runtime.getHeapUsage'),retention=await evaluate('window.__fixtureReceiptRetention');heapSamples.push({wallMs:Date.now()-started,serverElements:documents.get(root)?.elements.size,heap,retention});nextHeap=Date.now()+10000;await writeFile(reportPath+'.heap.json',JSON.stringify({baseline,heapSamples},null,2));}if(await evaluate(expression))return;await pause(100);}throw Error(label);};
  let report;
  try{
    await wait(`!!document.querySelector('.react-flow__node[data-id="perf-frame"]')&&document.querySelectorAll('.react-flow__node').length>=2`,'initial large canvas did not render');
    assert.equal(await evaluate('document.querySelectorAll(".react-flow__node-toolbar").length'),0,'unselected nodes retained empty toolbar subscriptions');
    const initialReadyMs=await evaluate('performance.now()');console.log('PERF initial scene ready '+Math.round(initialReadyMs)+' ms');
    await evaluate(`document.querySelector('.react-flow__node[data-id="perf-frame"]').dispatchEvent(new MouseEvent('click',{bubbles:true}))`);
    await wait(`!!document.querySelector('[aria-label="深复制选中内容"]')&&!document.querySelector('[aria-label="深复制选中内容"]').disabled`,'partition selection did not enable deep copy');
    await evaluate(`new Promise(resolve=>requestAnimationFrame(()=>requestAnimationFrame(resolve)))`);
    assert.equal(await evaluate('document.querySelectorAll(".react-flow__node-toolbar").length'),1,'selected frame did not own exactly one toolbar');
    await evaluate(`(()=>{
      const originals=new Set(['perf-source','perf-frame',...Array.from({length:${count}},(_,i)=>'perf-'+i)]),start=performance.now(),tasks=[],gaps=[];
      let raf,last=start,sawPreparing=false,firstDOM=null,firstFrame=null,localComplete=null,localCompleteFrame=null,prepared=null,maxNodes=0;
      const supported=PerformanceObserver.supportedEntryTypes.includes('longtask'),observer=supported?new PerformanceObserver(list=>tasks.push(...list.getEntries().map(entry=>({start:entry.startTime-start,duration:entry.duration})))):null;
      observer?.observe({type:'longtask'});
      function tick(now){gaps.push(now-last);last=now;const mounted=[...document.querySelectorAll('.react-flow__node')];maxNodes=Math.max(maxNodes,mounted.length);if(mounted.some(node=>!originals.has(node.dataset.id))){if(firstDOM===null)firstDOM=now-start;else if(firstFrame===null)firstFrame=now-start;}if(document.querySelector('[aria-label="画布导入"]')?.textContent.includes('已加入画布')){if(localComplete===null)localComplete=now-start;else if(localCompleteFrame===null)localCompleteFrame=now-start;}if(document.querySelector('[aria-label="正在准备复制"]'))sawPreparing=true;else if(sawPreparing&&prepared===null)prepared=now-start;raf=requestAnimationFrame(tick);}
      raf=requestAnimationFrame(tick);
      window.__canvasPerformance={read(){const sorted=[...gaps].sort((a,b)=>a-b),p95=sorted[Math.max(0,Math.ceil(sorted.length*.95)-1)]??0;return{frameGapP95Ms:p95,elapsedMs:performance.now()-start,firstDOMMs:firstDOM,firstPresentedFrameMs:firstFrame,localCompleteMs:localComplete,localCompleteFrameMs:localCompleteFrame,prepareMs:prepared,maxMountedNodes:maxNodes,nodeCount:document.querySelectorAll('.react-flow__node').length,longTasksSupported:supported,longTaskCount:tasks.length,maxLongTaskMs:Math.max(0,...tasks.map(task=>task.duration)),totalLongTaskMs:tasks.reduce((total,task)=>total+task.duration,0),maxFrameGapMs:Math.max(0,...gaps),longTasks:tasks};},stop(){cancelAnimationFrame(raf);if(observer){tasks.push(...observer.takeRecords().map(entry=>({start:entry.startTime-start,duration:entry.duration})));observer.disconnect();}return this.read();}};
      document.querySelector('[aria-label="深复制选中内容"]').click();
    })()`);
    copying=true;console.log('PERF copy requested');
    await wait(`document.querySelectorAll('.react-flow__node').length>0&&document.querySelector('[aria-label="画布导入"]')?.textContent.includes('已加入画布')&&[...document.querySelectorAll('[role=status]')].some(item=>item.textContent.trim()==='已同步')`,'large copy did not finish rendering and synchronization');
    await evaluate('new Promise(resolve=>requestAnimationFrame(()=>requestAnimationFrame(resolve)))');
    const internalsBatches=await evaluate('window.__fixtureInternalsBatches??[]');assert.ok(internalsBatches.some(size=>size>1),'mounted nodes did not share a renderer measurement batch');
    const measurements=await evaluate('window.__canvasPerformance.stop()'),document=documents.get(root),copiedCanvas=[...document.canvases.values()].find(canvas=>canvas.parent&&canvas.id!==partition);
    assert.equal(document.elements.size,2*count+5);assert.ok(copiedCanvas);assert.ok([...document.elements.values()].some(element=>element.structure==='connection'&&element.source.elementId==='perf-source'&&element.target.elementId===copiedCanvas.parent.entryElementId));assert.ok(document.elements.has('perf-incoming'));assert.ok(measurements.firstPresentedFrameMs!==null&&measurements.localCompleteFrameMs!==null);if(count>=100)assert.ok(measurements.nodeCount<target,'offscreen DOM was not culled');assert.ok(await evaluate(`document.querySelector('[aria-label="画布导入"]').textContent.includes('${count+3} 项')`),'copy progress did not include all source records');
    const visibleEdges=await evaluate('document.querySelectorAll(".react-flow__edge").length');assert.equal(visibleEdges,2,'frame connections did not render for the offscreen source');
    // Completion is a model/progress check. Verify an offscreen copied card actually mounts after panning.
    const originalLast=document.elements.get(`perf-${count-1}`),copiedLast=[...document.elements.values()].find(element=>element.structure==='node'&&element.ownerCanvasId===copiedCanvas.id&&element.geometry.x===originalLast.geometry.x&&element.geometry.y===originalLast.geometry.y);assert.ok(copiedLast);
    const world=toWorld(canvasTransform(document,copiedLast.ownerCanvasId),{x:copiedLast.geometry.x+copiedLast.geometry.width/2,y:copiedLast.geometry.y+copiedLast.geometry.height/2});
    await evaluate(`(()=>{const pane=document.querySelector('.react-flow__pane'),rect=pane.getBoundingClientRect(),matrix=new DOMMatrix(getComputedStyle(document.querySelector('.react-flow__viewport')).transform);pane.dispatchEvent(new WheelEvent('wheel',{deltaX:(${world.x}*matrix.a+matrix.e-rect.width/2)/.5,deltaY:(${world.y}*matrix.a+matrix.f-rect.height/2)/.5,bubbles:true,cancelable:true}));})()`);
    await wait(`!!document.querySelector('.react-flow__node[data-id="${copiedLast.id}"] textarea')`,'offscreen copied card did not mount after viewport pan');
    const viewportCheck={visibleEdgesBeforePan:visibleEdges,copiedId:copiedLast.id,mountedAfterPan:await evaluate('document.querySelectorAll(".react-flow__node").length')};
    report={baseline,heapSamples,browserLogs:browserLogs(),scenario:'actual GraphPage deep copy of expanded partition',mode:'Next development webpack; isolated fixture HTTP; real Chrome/IndexedDB/Web Locks',count,initialReadyMs,internals:{batches:internalsBatches.length,maxBatch:Math.max(0,...internalsBatches),totalRequests:internalsBatches.reduce((sum,size)=>sum+size,0)},measurements,viewportCheck,browser:await call('Browser.getVersion'),serverElements:document.elements.size,serverCanvases:document.canvases.size,wallMs:Date.now()-started};
    const screenshot=await call('Page.captureScreenshot',{format:'png'});await writeFile(reportPath.endsWith('.json')?reportPath.slice(0,-5)+'.png':reportPath+'.png',Buffer.from(screenshot.data,'base64'));
  }catch(error){let measurements;try{measurements=await evaluate('window.__canvasPerformance?.stop()');}catch{}report={baseline,heapSamples,browserLogs:browserLogs(),scenario:'actual GraphPage deep copy of expanded partition',count,error:error.message,measurements,serverElements:documents.get(root)?.elements.size,serverCanvases:documents.get(root)?.canvases.size,wallMs:Date.now()-started};await writeFile(reportPath,JSON.stringify(report,null,2));throw error;}
  await writeFile(reportPath,JSON.stringify(report,null,2));console.log('MEASURE '+JSON.stringify({...report,measurements:{...report.measurements,longTasks:undefined}}));console.log('REPORT '+reportPath);
}