// 打开百家号内容分析页，挂 XHR 钩子，抓取作品列表数据
import { connect, evaluate, saveJson } from './lib.mjs';

const cdp = await connect();
console.log('port=' + cdp.port);

// 复用已有标签或新建
const { targetInfos } = await cdp.send('Target.getTargets');
let page = targetInfos.find(t => t.type === 'page' && t.url.includes('baijiahao.baidu.com'));
if (!page) {
  const { targetId } = await cdp.send('Target.createTarget', {
    url: 'https://baijiahao.baidu.com/builder/rc/analysiscontent',
    background: false,
  });
  await new Promise(r => setTimeout(r, 1000));
  const t2 = await cdp.send('Target.getTargets');
  page = t2.targetInfos.find(t => t.targetId === targetId);
}
if (!page) { console.log('NO_PAGE'); process.exit(1); }

const { sessionId } = await cdp.send('Target.attachToTarget', { targetId: page.targetId, flatten: true });
await cdp.send('Page.enable', {}, sessionId).catch(() => {});
await cdp.send('Runtime.enable', {}, sessionId).catch(() => {});

// 装钩子（在页面加载前装不了，页面内导航可以）
await evaluate(cdp, sessionId, `(() => {
  window.__CAP = [];
  if (!window.__HOOKED) {
    window.__HOOKED = true;
    const oOpen = XMLHttpRequest.prototype.open;
    const oSend = XMLHttpRequest.prototype.send;
    XMLHttpRequest.prototype.open = function(m,u){ this.__u=u; return oOpen.apply(this,arguments); };
    XMLHttpRequest.prototype.send = function(){
      this.addEventListener('load', () => {
        try {
          const ct = this.getResponseHeader('content-type') || '';
          if (ct.includes('json') && this.responseText) {
            window.__CAP.push({ url: this.__u, body: this.responseText.slice(0,300000) });
          }
        } catch(e){}
      });
      return oSend.apply(this,arguments);
    };
  }
  return 'hooked';
})()`).catch(e => console.log('hook skipped: ' + e.message));

await new Promise(r => setTimeout(r, 4000));

// 页面内导航，触发数据加载
await evaluate(cdp, sessionId, `location.href='https://baijiahao.baidu.com/builder/rc/analysiscontent'`).catch(()=>{});
await new Promise(r => setTimeout(r, 12000));

const state = await evaluate(cdp, sessionId, `(() => ({
  url: location.href,
  title: document.title,
  text: (document.body?document.body.innerText:'').slice(0,8000),
  capUrls: (window.__CAP||[]).map(x=>x.url),
  capBodies: (window.__CAP||[]).map(x=>x.body)
}))()`);

saveJson('out/analysis-raw.json', state);
console.log('URL=' + String(state.url).replace(/[^\x20-\x7E]/g,'?'));
console.log('CAP=' + (state.capUrls||[]).length);
console.log('TEXT_LEN=' + String(state.text||'').length);
process.exit(0);