// Real Chromium smoke test; Node built-ins only. No paid model calls.
import {spawn} from 'node:child_process';
import {mkdtemp, mkdir, writeFile, rm} from 'node:fs/promises';
import {tmpdir} from 'node:os';
import path from 'node:path';
const port=18765, debugPort=18766;
const pause=ms=>new Promise(r=>setTimeout(r,ms));
const output=path.resolve('service-data/ui-preview');await mkdir(output,{recursive:true});
const profile=await mkdtemp(path.join(tmpdir(),'vba-browser-'));
const fixtureRoot=await mkdtemp(path.join(tmpdir(),'vba-ui-data-'));
let browser,server,ws; const errors=[];
async function until(fn, milliseconds=15000){const start=Date.now();while(Date.now()-start<milliseconds){try{const v=await fn();if(v)return v;}catch{}await pause(100);}throw new Error('Timed out waiting for UI');}
try {
  server=spawn(path.resolve('.venv/Scripts/python.exe'),['tests/ui_dashboard_server.py'],{windowsHide:true,env:{...process.env,VBA_UI_TEST_PORT:String(port),VBA_UI_TEST_WORKSPACE:fixtureRoot},stdio:'ignore'});
  await until(async()=> (await fetch(`http://127.0.0.1:${port}/healthz`)).ok);
  browser=spawn(process.env.BROWSER_PATH||'C:/Program Files (x86)/Microsoft/Edge/Application/msedge.exe',[
    '--headless=new','--disable-gpu','--no-first-run','--no-default-browser-check',
    `--user-data-dir=${profile}`,`--remote-debugging-port=${debugPort}`,'about:blank'],{windowsHide:true,stdio:'ignore'});
  const tabs=await until(async()=>await (await fetch(`http://127.0.0.1:${debugPort}/json`)).json());
  ws=new WebSocket(tabs.find(t=>t.type==='page').webSocketDebuggerUrl);
  await new Promise((resolve,reject)=>{ws.onopen=resolve;ws.onerror=reject;});
  let next=0;const pending=new Map();
  ws.onmessage=e=>{const m=JSON.parse(e.data);if(m.id){const p=pending.get(m.id);pending.delete(m.id);m.error?p.reject(new Error(m.error.message)):p.resolve(m.result);}
    if(m.method==='Runtime.exceptionThrown')errors.push(m.params.exceptionDetails.text);
    if(m.method==='Log.entryAdded'&&m.params.entry.level==='error')errors.push(m.params.entry.text);};
  const send=(method,params={})=>new Promise((resolve,reject)=>{const id=++next;pending.set(id,{resolve,reject});ws.send(JSON.stringify({id,method,params}));});
  const evaluate=async expression=>{const r=await send('Runtime.evaluate',{expression,returnByValue:true,awaitPromise:true});if(r.exceptionDetails)throw new Error(r.exceptionDetails.text);return r.result.value;};
  await send('Runtime.enable');await send('Log.enable');await send('Page.enable');
  await send('Emulation.setDeviceMetricsOverride',{width:1440,height:1200,deviceScaleFactor:1,mobile:false});
  await send('Page.navigate',{url:`http://127.0.0.1:${port}/`});
  await until(()=>evaluate("document.readyState === 'complete' && typeof render === 'function'"));
  await evaluate("document.getElementById('token').value='ui_fixture_"+'x'.repeat(40)+"';document.getElementById('login-form').dispatchEvent(new Event('submit',{bubbles:true,cancelable:true}));");
  await until(()=>evaluate("document.getElementById('token-count').textContent==='35.300'"));
  const state=await evaluate("({workers:document.querySelectorAll('.worker').length,cases:document.querySelectorAll('#case-rows tr').length,active:document.getElementById('active-count').textContent,correction:document.getElementById('correction-count').textContent,overflow:document.documentElement.scrollWidth>innerWidth,stored:localStorage.length,progress:document.querySelector('.worker [role=progressbar]').getAttribute('aria-valuenow')})");
  if(state.workers!==1||state.cases!==1||state.active!=='1'||state.stored!==0||state.overflow||state.progress!=='57')throw new Error(JSON.stringify(state));
  const categories=await evaluate("Array.from(document.querySelectorAll('#legend li')).map(e=>e.textContent)");
  for(const name of ['Fallaufbau','Fallplanung','Hypothesen','Untersuchung','Diagnose','Codingauftrag','Korrekturen']) {
    if(!categories.some(c=>c.includes(name)))throw new Error(`Missing phase in pie legend: ${name}`);
  }
  await writeFile(path.join(output,'desktop.png'),Buffer.from((await send('Page.captureScreenshot',{format:'png'})).data,'base64'));
  await send('Emulation.setDeviceMetricsOverride',{width:390,height:1200,deviceScaleFactor:1,mobile:true});await pause(200);
  if(await evaluate('document.documentElement.scrollWidth>innerWidth'))throw new Error('Mobile horizontal overflow');
  await writeFile(path.join(output,'mobile.png'),Buffer.from((await send('Page.captureScreenshot',{format:'png'})).data,'base64'));
  await evaluate("document.getElementById('project-filter').value='viano-core';document.getElementById('project-filter').dispatchEvent(new Event('change')); ");
  if(await evaluate("document.getElementById('token-count').textContent")!=='35.300')throw new Error('Project aggregation differs');
  await evaluate("location.hash='#results'");
  await until(()=>evaluate("!document.getElementById('results').hidden&&document.querySelector('#result-rows a')"));
  await evaluate("document.querySelector('#result-rows a').click()");
  await until(()=>evaluate("document.getElementById('case-detail').textContent.includes('SQL-Vorlage mit Platzhaltern')"));
  if(!await evaluate("document.getElementById('case-detail').textContent.includes('Passende Spawndaten ermitteln')"))throw new Error('Human assignment absent');
  if(await evaluate('document.documentElement.scrollWidth>innerWidth'))throw new Error('Mobile detail overflow');
  await writeFile(path.join(output,'case-mobile.png'),Buffer.from((await send('Page.captureScreenshot',{format:'png'})).data,'base64'));
  await send('Emulation.setDeviceMetricsOverride',{width:1440,height:1200,deviceScaleFactor:1,mobile:false});await pause(200);
  await writeFile(path.join(output,'case-desktop.png'),Buffer.from((await send('Page.captureScreenshot',{format:'png'})).data,'base64'));
  await evaluate("location.hash='#overview'");await pause(100);
  await evaluate("document.getElementById('kind').value='case_return';document.getElementById('kind').dispatchEvent(new Event('change'));");
  if(!await evaluate("document.getElementById('new-files').hidden&&!document.getElementById('return-files').hidden"))throw new Error('Return form not selected');
  await evaluate("document.getElementById('logout').click()");
  if(!await evaluate("document.getElementById('content').hidden&&!document.getElementById('login').hidden&&document.getElementById('token-count').textContent==='—'"))throw new Error('Logout retained visible case data');
  if(!await evaluate("document.getElementById('case-detail').childElementCount===0&&document.getElementById('result-rows').childElementCount===0"))throw new Error('Logout retained detail data');
  if(errors.filter(e=>!e.includes('404')).length)throw new Error(errors.join('\n'));
  console.log(JSON.stringify({status:'PASS',...state,console_errors:errors.filter(e=>!e.includes('404'))}));
} finally {
  ws?.close();browser?.kill();server?.kill();await pause(400);
  for(const [folder,prefix] of [[profile,'vba-browser-'],[fixtureRoot,'vba-ui-data-']]) {
    const target=path.resolve(folder),relative=path.relative(path.resolve(tmpdir()),target);
    if(!relative||relative.startsWith('..')||path.isAbsolute(relative)||!path.basename(target).startsWith(prefix))throw new Error('Unsafe temporary cleanup');
    await rm(target,{recursive:true,force:true,maxRetries:5,retryDelay:200});
  }
}