// ==UserScript==
// @name         嘉职院沃创刷课助手
// @namespace    https://github.com/woczx-auto-study
// @version      2.2.0
// @description  嘉职院沃创刷课助手 - 支持跨单元自动跳转
// @match        *://jxvtcedu.woczx.com/*
// @match        *://*.woczx.com/*
// @include      *woczx.com/*
// @include      *busionline.com/*
// @grant        unsafeWindow
// @grant        GM_getValue
// @grant        GM_setValue
// @run-at       document-end
// @license      MIT
// ==/UserScript==

(function(){
'use strict';

// ======================== 配置 ========================
const CONFIG={
  speed:GM_getValue('woczx_speed',4),
  smartSkip:GM_getValue('woczx_smartSkip',true),
  skipSpeed:GM_getValue('woczx_skipSpeed',2),
  skipRatio:GM_getValue('woczx_skipRatio',0.9),
  autoMute:GM_getValue('woczx_autoMute',true),
  autoNext:GM_getValue('woczx_autoNext',true),
  nextDelay:GM_getValue('woczx_nextDelay',2),
  showPanel:GM_getValue('woczx_showPanel',true),
  debug:GM_getValue('woczx_debug',true),
  endThreshold:GM_getValue('woczx_endThreshold',5),
  speedEnforceInterval:GM_getValue('woczx_speedEnforce',500),
  studyId:GM_getValue('woczx_studyId',''),
};
const STATE={
  running:false,currentCourse:'',currentChapter:'',videoCount:0,popupsClosed:0,
  startTime:null,playerInstance:null,videoEnded:false,nextAttemptCount:0,maxNextAttempts:15,
};
const log=(...a)=>{if(CONFIG.debug)console.log('[嘉职院刷课]',...a);};
const $=(s,r)=>(r||document).querySelector(s);
const $$=(s,r)=>[...(r||document).querySelectorAll(s)];
function isVideoPage(){return location.hash.includes('/unit/video');}
function isGradePage(){return location.hash.includes('/student/grade/detail');}

// ======================== 面板 ========================
function createPanel(){
  const p=document.createElement('div'); p.id='woczx-panel';
  p.innerHTML='<style>#woczx-panel{position:fixed;top:80px;right:16px;z-index:99999;width:270px;background:#fff;border-radius:10px;box-shadow:0 4px 24px rgba(0,0,0,.15);font-family:-apple-system,BlinkMacSystemFont,"Segoe UI",Roboto,sans-serif;font-size:12px;user-select:none}#woczx-panel .wz-header{padding:10px 14px;background:#722ed1;color:#fff;border-radius:10px 10px 0 0;cursor:move;display:flex;justify-content:space-between;align-items:center}#woczx-panel .wz-title{font-weight:600;font-size:14px}#woczx-panel .wz-toggle{cursor:pointer;font-size:16px;line-height:1}#woczx-panel .wz-body{padding:12px 14px;max-height:420px;overflow-y:auto}#woczx-panel .wz-body.collapsed{display:none}#woczx-panel .wz-row{display:flex;justify-content:space-between;align-items:center;margin-bottom:8px}#woczx-panel .wz-row label{color:#555;font-size:12px;white-space:nowrap}#woczx-panel .wz-row input[type=range]{width:90px;margin:0 4px}#woczx-panel .wz-row select{font-size:11px;padding:2px 4px}#woczx-panel .wz-row input[type=checkbox]{margin:0}#woczx-panel .wz-status{background:#f5f5f5;border-radius:4px;padding:8px;font-size:11px;color:#888;margin-top:6px;line-height:1.6}#woczx-panel .wz-status span{color:#333;font-weight:500}#woczx-panel .wz-btn{display:block;width:100%;margin-top:8px;padding:7px 0;border:none;border-radius:4px;font-size:13px;cursor:pointer;font-weight:500}#woczx-panel .wz-btn-start{background:#52c41a;color:#fff}#woczx-panel .wz-btn-stop{background:#ff4d4f;color:#fff}#woczx-panel .wz-btn-pause{background:#faad14;color:#fff}#woczx-panel .wz-btn-next{background:#1890ff;color:#fff;margin-top:4px}#woczx-panel .wz-btn-grade{background:#722ed1;color:#fff;margin-top:4px}#woczx-panel .wz-btn-debug{background:#eee;color:#666;margin-top:4px}#woczx-panel .wz-float-speed{position:fixed;bottom:60px;left:20px;background:rgba(0,0,0,.75);color:#0f0;padding:4px 14px;border-radius:4px;font-size:18px;font-weight:bold;z-index:100000;font-family:monospace;display:none;pointer-events:none}</style>'
  +'<div class="wz-header"><span class="wz-title">嘉职院沃创刷课助手 v2.2</span><span class="wz-toggle">−</span></div>'
  +'<div class="wz-body">'
  +'<div class="wz-row" style="background:#f9f0ff;border:1px solid #d3adf7;border-radius:4px;padding:4px 6px;margin-bottom:10px"><span style="font-size:11px;color:#531dab">支持跨单元自动跳转</span></div>'
  +'<div class="wz-row"><label>智能跳尾</label><input type="checkbox" id="wz-smartskip" '+(CONFIG.smartSkip?'checked':'')+'><span style="font-size:11px;color:#52c41a">防检测</span></div>'
  +'<div class="wz-row"><label>播放速度</label><input type="range" id="wz-speed" min="1" max="8" value="'+Math.min(CONFIG.speed,8)+'" step="0.5"><span id="wz-speed-val">'+Math.min(CONFIG.speed,8)+'x</span></div>'
  +'<div class="wz-row"><label>跳尾速度</label><select id="wz-skip-speed"><option value="1" '+(CONFIG.skipSpeed===1?'selected':'')+'>1x(最安全)</option><option value="2" '+(CONFIG.skipSpeed===2?'selected':'')+'>2x(推荐)</option><option value="3" '+(CONFIG.skipSpeed===3?'selected':'')+'>3x</option><option value="4" '+(CONFIG.skipSpeed===4?'selected':'')+'>4x</option></select></div>'
  +'<div class="wz-row"><label>自动静音</label><input type="checkbox" id="wz-mute" '+(CONFIG.autoMute?'checked':'')+'></div>'
  +'<div class="wz-row"><label>自动下一节</label><input type="checkbox" id="wz-autonext" '+(CONFIG.autoNext?'checked':'')+'></div>'
  +'<div class="wz-status" id="wz-status"><div>课程: <span id="wz-course-name">--</span></div><div>章节: <span id="wz-chapter-name">--</span></div><div>弹窗: <span id="wz-popup-count">0</span>次</div><div>运行: <span id="wz-runtime">00:00</span></div><div>倍速: <span id="wz-current-speed">1x</span></div><div>状态: <span id="wz-run-status">待启动</span></div></div>'
  +'<button class="wz-btn wz-btn-start" id="wz-btn-start">▶ 开始刷课</button>'
  +'<button class="wz-btn wz-btn-pause" id="wz-btn-pause" style="display:none">⏸ 暂停</button>'
  +'<button class="wz-btn wz-btn-stop" id="wz-btn-stop" style="display:none">⏹ 停止</button>'
  +'<button class="wz-btn wz-btn-next" id="wz-btn-next">⏭ 手动跳下一节</button>'
  +'<button class="wz-btn wz-btn-grade" id="wz-btn-grade">📋 返回学习详情</button>'
  +'<button class="wz-btn wz-btn-debug" id="wz-btn-debug">🐛 调试</button>'
  +'</div><div class="wz-float-speed" id="wz-float-speed">4x</div>';
  document.body.appendChild(p);
  bindEvents(p); return p;
}
function bindEvents(p){
  p.querySelector('.wz-toggle').addEventListener('click',function(){
    const b=p.querySelector('.wz-body'); b.classList.toggle('collapsed'); this.textContent=b.classList.contains('collapsed')?'+':'−';
  });
  p.querySelector('#wz-speed').addEventListener('input',function(){
    const v=parseFloat(this.value); p.querySelector('#wz-speed-val').textContent=v+'x';
    CONFIG.speed=v; GM_setValue('woczx_speed',v); applySpeed(v);
  });
  p.querySelector('#wz-smartskip').addEventListener('change',function(){CONFIG.smartSkip=this.checked;GM_setValue('woczx_smartSkip',this.checked);});
  p.querySelector('#wz-skip-speed').addEventListener('change',function(){CONFIG.skipSpeed=parseInt(this.value);GM_setValue('woczx_skipSpeed',parseInt(this.value));});
  p.querySelector('#wz-mute').addEventListener('change',function(){CONFIG.autoMute=this.checked;GM_setValue('woczx_autoMute',this.checked);applyMute(this.checked);});
  p.querySelector('#wz-autonext').addEventListener('change',function(){CONFIG.autoNext=this.checked;GM_setValue('woczx_autoNext',this.checked);});
  p.querySelector('#wz-btn-start').addEventListener('click',startAutoStudy);
  p.querySelector('#wz-btn-pause').addEventListener('click',pauseAutoStudy);
  p.querySelector('#wz-btn-stop').addEventListener('click',stopAutoStudy);
  p.querySelector('#wz-btn-next').addEventListener('click',()=>{if(isVideoPage())goToNextChapter();else if(isGradePage())startNextUnit();});
  p.querySelector('#wz-btn-grade').addEventListener('click',goToGradePage);
  p.querySelector('#wz-btn-debug').addEventListener('click',debugPage);
  makeDraggable(p);
}
function makeDraggable(p){
  const h=p.querySelector('.wz-header'); let ox,oy,d=false;
  h.addEventListener('mousedown',e=>{if(e.target.classList.contains('wz-toggle'))return;d=true;ox=e.clientX-p.offsetLeft;oy=e.clientY-p.offsetTop;p.style.transition='none';});
  document.addEventListener('mousemove',e=>{if(!d)return;p.style.left=(e.clientX-ox)+'px';p.style.top=(e.clientY-oy)+'px';p.style.right='auto';});
  document.addEventListener('mouseup',()=>{d=false;p.style.transition='';});
}
function updateStatus(u){for(const[k,v]of Object.entries(u)){const e=document.getElementById(k);if(e)e.textContent=v;}}

// ======================== 播放器 ========================
function findVideo(){
  const vs=$$('video');for(const v of vs){if(v.readyState>=1||v.src||v.querySelector('source'))return v;}
  if(vs.length>0)return vs[0];
  for(const f of $$('iframe')){try{const d=f.contentDocument||f.contentWindow?.document;if(d){const v=d.querySelector('video');if(v)return v;}}catch(e){}}
  for(const c of $$('[class*="player"],[id*="player"],[class*="video-wrap"],[class*="videoBox"]')){const v=c.querySelector('video');if(v)return v;}
  return null;
}
function getVE(p){if(!p)return null;if(p.tagName==='VIDEO')return p;if(p.querySelector){const v=p.querySelector('video');if(v)return v;}return p._video||p.video||p;}
function applySpeed(s){
  const ve=getVE(STATE.playerInstance)||findVideo();if(!ve)return;
  const sp=s||(CONFIG.smartSkip&&STATE._skipDone?CONFIG.skipSpeed:CONFIG.speed);
  try{if(ve.playbackRate!==undefined)ve.playbackRate=sp;if(ve.setRate)ve.setRate(sp);}catch(e){}
  const fl=document.getElementById('wz-float-speed');
  if(fl){fl.textContent=sp+'x';fl.style.display='block';clearTimeout(fl._t);fl._t=setTimeout(()=>{fl.style.display='none';},1500);}
  updateStatus({'wz-current-speed':sp+'x'});
}
function applyMute(m){const ve=getVE(STATE.playerInstance)||findVideo();if(ve){try{ve.muted=m;}catch(e){}}}
function hookVideo(player){
  const ve=getVE(player);if(!ve||ve._wzHooked)return;ve._wzHooked=true;STATE.playerInstance=ve;STATE._skipDone=false;log('挂钩视频');
  ve.addEventListener('play',()=>{
    STATE.videoEnded=false;updateStatus({'wz-run-status':'播放中'});applySpeed();applyMute(CONFIG.autoMute);
    if(CONFIG.smartSkip&&!STATE._skipDone&&ve.duration&&isFinite(ve.duration)&&ve.duration>10){
      const to=ve.duration*CONFIG.skipRatio;log('跳尾: '+to.toFixed(1)+'s/'+ve.duration.toFixed(1)+'s');
      ve.currentTime=to;STATE._skipDone=true;setTimeout(()=>applySpeed(CONFIG.skipSpeed),200);
    }
  });
  ve.addEventListener('pause',()=>{if(!STATE.videoEnded&&STATE.running&&ve.paused)setTimeout(()=>{if(STATE.running&&ve.paused&&!STATE.videoEnded){ve.muted=true;ve.play().catch(()=>{});}},300);});
  ve.addEventListener('ended',()=>{
    if(STATE._navigating)return;log('ended');STATE.videoEnded=true;STATE.videoCount++;STATE._skipDone=false;
    updateStatus({'wz-run-status':'已完成'});if(CONFIG.autoNext)setTimeout(()=>{if(STATE.running)goToNextChapter();},CONFIG.nextDelay*1000);
  });
  ve.addEventListener('loadeddata',()=>{if(STATE.running){STATE.videoEnded=false;STATE.nextAttemptCount=0;STATE._skipDone=false;applyMute(CONFIG.autoMute);}});
  ve.addEventListener('ratechange',()=>{if(STATE.running&&!STATE.videoEnded){const t=(CONFIG.smartSkip&&STATE._skipDone)?CONFIG.skipSpeed:CONFIG.speed;if(ve.playbackRate!==t)requestAnimationFrame(()=>applySpeed(t));}});
}

// ======================== 弹窗 ========================
function closePopups(){
  if(STATE._navigating)return 0;let c=0;
  for(const m of $$('.ant-modal-wrap,.ant-modal-root')){
    if(!m.offsetParent&&m.style.display==='none')continue;const t=m.textContent||'';
    if(t.includes('继续')||t.includes('确定')||t.includes('确认')||t.includes('认真度')||t.includes('还在吗')){
      const b=m.querySelector('.ant-btn-primary')||m.querySelector('.ant-modal-confirm-btns .ant-btn:last-child')||m.querySelector('button:last-of-type');
      if(b){b.click();c++;continue;}
    }
    const x=m.querySelector('.ant-modal-close');if(x){x.click();c++;}
  }
  for(const s of ['.ant-modal','.ant-popover','.ant-popconfirm','.ant-drawer','[class*=dialog]','[class*=modal]','[class*=popup]','[class*=toast]','[role=dialog]','[class*=alert]','[class*=mask]']){
    for(const d of $$(s)){
      if(!d.offsetParent&&d.style.display==='none')continue;const t=(d.textContent||'').trim();if(!t||t.length<2)continue;
      if(['继续学习','确定','知道了','认真度检测','学习确认','确认继续','还在吗','是否继续'].some(p=>t.includes(p))){
        const btns=[...d.querySelectorAll('button,.ant-btn')].filter(b=>b.offsetParent);if(btns.length>=1){btns[btns.length-1].click();c++;}
      }
    }
  }
  if(c>0){STATE.popupsClosed+=c;updateStatus({'wz-popup-count':String(STATE.popupsClosed)});}return c;
}

// ======================== 下一节 ========================
function goToNextChapter(){
  if(STATE._navigating){log('跳转中');return false;}
  STATE.nextAttemptCount++;log('===== 跳转('+STATE.nextAttemptCount+') =====');

  // 超过最大尝试次数 → DOM找不到下一节，走兜底：回学习详情页重新定位
  if(STATE.nextAttemptCount>STATE.maxNextAttempts){
    log('已达最大尝试次数 → 回学习详情页重新定位');
    STATE._navigating=false;STATE.nextAttemptCount=0;
    updateStatus({'wz-run-status':'回详情页定位'});
    return goToGradePage();
  }

  STATE._navigating=true;

  // 先尝试所有策略找下一节
  if(tryFindNextChapter()){
    STATE.nextAttemptCount=0;
    return true;
  }

  // 没找到 → 解锁并等待重试，不立刻放弃
  log('暂未找到下一节入口，'+CONFIG.nextDelay+'秒后重试('+STATE.nextAttemptCount+'/'+STATE.maxNextAttempts+')');
  STATE._navigating=false;
  setTimeout(()=>{if(STATE.running&&!STATE._navigating)goToNextChapter();},CONFIG.nextDelay*1000);
  return false;
}

function tryFindNextChapter(){
  // 策略0: 章节列表
  for(let i=0;i<$$('[class*=list] [class*=item]').length;i++){
    const t=($$('[class*=list] [class*=item]')[i].textContent||'').trim();
    if(t.includes('已学')&&!t.includes('已完成')&&i+1<$$('[class*=list] [class*=item]').length){
      log('策略0: 章节'+i+'→'+(i+1));clickEl($$('[class*=list] [class*=item]')[i+1]);resetChapter();return true;
    }
  }
  // 策略0b: Endmodal
  const emb=$('[class*=Endmodal] [class*=next_button],[class*=endmodal] [class*=next_button],[class*=Endmodal] .ant-btn-primary');
  if(emb&&emb.offsetParent){log('Endmodal');clickEl(emb);resetChapter();return true;}
  // 策略1: 文字
  for(const t of['下一单元','下一节','下一章','下一课','下一个','下节']){
    for(const e of $$('button,a,span,div,li,.ant-btn,[class*=btn]')){
      if((e.textContent||'').trim()===t&&e.offsetParent&&!e.closest('#woczx-panel')){log('文字:',t);clickEl(e);resetChapter();return true;}
    }
  }
  // 侧边栏
  for(const s of['.ant-menu-item','[class*=chapter-item]','[class*=lesson-item]','[class*=list-item]','[class*=catalog] li']){
    let found=false;
    for(let i=0;i<$$(s).length;i++){
      const cl=$$(s)[i].className||'';const act=cl.includes('active')||cl.includes('selected')||cl.includes('current')||cl.includes('playing');
      if(found&&$$(s)[i].offsetParent){log('侧边栏下一个');clickEl($$(s)[i].querySelector('a')||$$(s)[i]);resetChapter();return true;}
      if(act)found=true;
    }
  }
  return false;
}
function resetChapter(){
  STATE.videoEnded=false;STATE.playerInstance=null;STATE.nextAttemptCount=0;STATE._skipDone=false;log('跳转成功');
  // 保持 _navigating 锁定 5 秒，防止 ended/checkNearEnd 的二次触发
  setTimeout(()=>{STATE._navigating=false;},5000);
}
function clickEl(el){
  el.click();el.dispatchEvent(new MouseEvent('click',{bubbles:true,cancelable:true}));
  el.dispatchEvent(new MouseEvent('mousedown',{bubbles:true}));el.dispatchEvent(new MouseEvent('mouseup',{bubbles:true}));
}

// ======================== ★ 跨单元跳转 ★ ========================
function goToGradePage(){
  STATE._navigating=true;log('===== 跳转学习详情页 =====');
  const m=location.hash.match(/study_id=(\d+)/);
  const sid=m?m[1]:CONFIG.studyId;
  if(sid){CONFIG.studyId=sid;GM_setValue('woczx_studyId',sid);}
  if(sid){
    updateStatus({'wz-run-status':'跳转学习详情...'});
    location.hash='#/app/student/grade/detail/'+sid;
    // 由 watchRoute() 统一触发 startNextUnit()，避免与 goToGradePage 的定时器冲突造成循环跳转
    setTimeout(()=>{STATE._navigating=false;},5000);
  }else{log('无study_id');STATE._navigating=false;}
  return true;
}

function startNextUnit(){
  if(!isGradePage())return goToGradePage();
  log('===== 查找未学习单元 =====');

  const units=$$('[class*="detail_list_video--"]');

  // 策略1（优先）: 找"继续学习"——先做完未完成的单元
  for(const u of units){
    const t=(u.textContent||'').trim();
    if(t.includes('继续学习')&&u.offsetParent){
      log('进行中单元:',t.substring(0,60));
      const btn=[...u.querySelectorAll('*')].find(el=>(el.textContent||'').trim()==='继续学习'&&el.children.length===0);
      if(btn)clickEl(btn);else clickEl(u);
      updateStatus({'wz-run-status':'继续学习'});
      startVideoModeForce();
      return true;
    }
  }

  // 策略2: 找"未开始" + "开始学习"
  for(const u of units){
    const t=(u.textContent||'').trim();
    if(t.includes('未开始')&&t.includes('开始学习')&&u.offsetParent){
      log('未学习单元:',t.substring(0,60));
      const btn=[...u.querySelectorAll('*')].find(el=>(el.textContent||'').trim()==='开始学习'&&el.children.length===0);
      if(btn){clickEl(btn);}else{clickEl(u);}
      updateStatus({'wz-run-status':'进入新单元'});
      startVideoModeForce();
      return true;
    }
  }

  // 策略3: 当前页无可用单元 → 尝试翻下一页
  if(tryNextPage()){
    updateStatus({'wz-run-status':'翻页中...'});
    return false;
  }

  log('全部完成');updateStatus({'wz-run-status':'✅ 全部完成!'});stopAutoStudy();return false;
}

// ======================== ★ 翻页 ★ ========================
function tryNextPage(){
  // 查找 Ant Design 分页器
  const pagers=['.ant-pagination','[class*=pagination]','.ant-list-pagination','[class*=Pagination]'];
  for(const s of pagers){
    const pager=$(s);
    if(!pager||!pager.offsetParent)continue;

    // 找"下一页"按钮（未禁用）
    const nextBtn=pager.querySelector('.ant-pagination-next:not(.ant-pagination-disabled)')
      ||pager.querySelector('[class*=next]:not([class*=disabled]):not([disabled])')
      ||pager.querySelector('[title="下一页"]:not([disabled])')
      ||[...pager.querySelectorAll('li')].find(li=>(li.textContent||'').includes('下一页')&&!li.className.includes('disabled'))
      ||[...pager.querySelectorAll('button,a,li')].find(el=>{
        const t=(el.textContent||'').trim();
        return (t==='下一页'||t==='>'||t==='›'||t==='»')&&el.offsetParent&&!el.disabled&&!el.className.includes('disabled');
      });

    if(nextBtn){
      log('翻页 → 下一页');
      clickEl(nextBtn);
      setTimeout(()=>{if(STATE.running)startNextUnit();},2000);
      return true;
    }

    // 检查是否还有未激活的页码按钮
    const pageItems=[...pager.querySelectorAll('.ant-pagination-item:not(.ant-pagination-item-active):not(.ant-pagination-disabled)')];
    if(pageItems.length>0){
      log('翻页 → 第'+pageItems[0].textContent+'页');
      clickEl(pageItems[0]);
      setTimeout(()=>{if(STATE.running)startNextUnit();},2000);
      return true;
    }

    // 通用：找任何未禁用、非当前页的页码元素
    for(const el of [...pager.querySelectorAll('li,a,button')]){
      const cls=el.className||'';
      const txt=(el.textContent||'').trim();
      if(/^\d+$/.test(txt)&&!cls.includes('active')&&!cls.includes('current')&&!cls.includes('disabled')&&el.offsetParent&&!el.disabled){
        log('翻页 → 页码'+txt);
        clickEl(el);
        setTimeout(()=>{if(STATE.running)startNextUnit();},2000);
        return true;
      }
    }
  }

  // 策略B: 页面底部的分页区域（非 Ant Design 组件）
  for(const el of $$('[class*=page] a,[class*=page] button,[class*=page] li,.ant-list-pagination a')) {
    const t=(el.textContent||'').trim();
    if((t==='下一页'||t==='>'||t==='›'||t==='»'||/^\d+$/.test(t))&&el.offsetParent&&!el.disabled&&!el.className.includes('disabled')&&!el.className.includes('active')){
      log('翻页(通用) → ',t);
      clickEl(el);
      setTimeout(()=>{if(STATE.running)startNextUnit();},2000);
      return true;
    }
  }

  return false;
}


// ★ 强制启动视频模式（不管当前状态）
function startVideoModeForce(){
  // 清理旧状态，但不碰 _navigating（防抖锁由 goToNextChapter/resetChapter 管理）
  STATE.running = true;
  STATE.videoEnded = false;
  STATE.playerInstance = null;
  STATE.nextAttemptCount = 0;
  STATE._skipDone = false;
  // 不重置 _navigating！否则会破坏跳转防抖

  // 重启所有定时器
  clearInterval(mainLoop); clearInterval(popupLoop); clearInterval(speedLoop);

  log('强制启动视频模式');
  updateStatus({'wz-run-status':'运行中'});
  updateInfo();

  // 主循环
  mainLoop=setInterval(()=>{
    if(!STATE.running)return;
    const p=findVideo();
    if(p&&(!STATE.playerInstance||STATE.playerInstance!==getVE(p))){
      const v=getVE(p);if(v&&!v._wzHooked)hookVideo(p);
    }
    if(STATE.playerInstance){
      const v=getVE(STATE.playerInstance);
      if(v&&v.paused&&!STATE.videoEnded){
        // 必须先静音再播放，否则浏览器拦截自动播放
        v.muted=true;
        v.play().then(()=>{applySpeed();applyMute(CONFIG.autoMute);}).catch(()=>{
          // 浏览器拦截，尝试模拟点击视频
          v.muted=true; v.play().catch(()=>{});
        });
      }
      if(v&&!STATE.videoEnded)checkNearEnd();
    }
    updateInfo();
    if(STATE.startTime){
      const e=Math.floor((Date.now()-STATE.startTime)/1000);
      updateStatus({'wz-runtime':String(Math.floor(e/60)).padStart(2,'0')+':'+String(e%60).padStart(2,'0')});
    }
  },2000);

  // 弹窗检测
  popupLoop=setInterval(()=>{if(STATE.running)closePopups();},CONFIG.popupCheckInterval);

  // 速度强制
  startSpeedLoop();

  // 不断尝试挂钩视频，直到成功
  let retries=0;
  function tryHook(){
    if(!STATE.running||!isVideoPage()){if(retries<20&&STATE.running)setTimeout(tryHook,1500);return;}
    const p=findVideo();
    if(p){
      const v=getVE(p);if(v)v._wzHooked=false;
      hookVideo(p);applySpeed();applyMute(CONFIG.autoMute);
      log('视频挂钩成功 (重试'+retries+'次)');
    } else if(retries<20){
      retries++;
      setTimeout(tryHook,1500);
    } else {
      log('视频挂钩超时');
    }
  }
  setTimeout(tryHook,2000);

  // 重启 DOM 监听
  watchNew();

  // 更新面板按钮
  const startBtn=document.getElementById('wz-btn-start');
  const pauseBtn=document.getElementById('wz-btn-pause');
  const stopBtn=document.getElementById('wz-btn-stop');
  if(startBtn)startBtn.style.display='none';
  if(pauseBtn)pauseBtn.style.display='block';
  if(stopBtn)stopBtn.style.display='block';
}

// ======================== 辅助 ========================
function updateInfo(){
  for(const s of['[class*=course-title]','[class*=course-name]','h1','h2','.ant-page-header-heading-title','.ant-breadcrumb li:last-child']){
    const e=$(s);if(e&&e.textContent&&e.textContent.trim().length>1&&e.textContent.trim().length<100){STATE.currentCourse=e.textContent.trim();break;}
  }
  for(const s of['.ant-menu-item-selected','[class*=active][class*=chapter]','[class*=current]','[class*=playing]','.is-active']){
    const e=$(s);if(e&&e.textContent&&e.textContent.trim().length>1){STATE.currentChapter=e.textContent.trim();break;}
  }
  updateStatus({'wz-course-name':STATE.currentCourse||'未识别','wz-chapter-name':STATE.currentChapter||'未识别'});
}
function checkNearEnd(){
  if(!STATE.running||STATE.videoEnded||STATE._navigating)return;
  const ve=getVE(STATE.playerInstance)||findVideo();if(!ve||!ve.duration||!isFinite(ve.duration))return;
  const r=ve.duration-ve.currentTime;
  // 视频剩余5秒内，且已播放超过10秒（排除智能跳尾后对短片的误触发）
  if(r<=5&&r>0&&ve.currentTime>10){
    if(!STATE._nearEndTime)STATE._nearEndTime=Date.now();
    // 持续在结尾区域超过12秒仍无ended事件 → 兜底跳转
    if(Date.now()-STATE._nearEndTime>12000){
      log('ended未触发，兜底跳转(r='+r.toFixed(1)+'s)');
      STATE.videoEnded=true;STATE.videoCount++;STATE._nearEndTime=null;
      updateStatus({'wz-run-status':'兜底跳转'});if(CONFIG.autoNext)goToNextChapter();
    }
  }else if(r>5){
    STATE._nearEndTime=null;
  }
}

  // ======================== 调试 ========================
  function debugPage(){
  console.group('嘉职院刷课 - 页面结构');
  console.log('URL:',location.href,'| 视频页:',isVideoPage(),'| 详情页:',isGradePage());
  const vs=$$('video');console.log('Video:',vs.length);vs.forEach((v,i)=>console.log(' ['+i+']',v.src?.substring(0,80),v.duration,v.paused));
  const bs=[...$$('button,.ant-btn,a[class*=btn]')].filter(b=>b.offsetParent&&!b.closest('#woczx-panel'));
  console.log('按钮:',bs.length);bs.slice(0,30).forEach((b,i)=>console.log(' ['+i+']',(b.textContent||'').trim().substring(0,25),b.className?.substring(0,50)));
  if(isGradePage()){
    console.log('--- 学习详情单元 ---');
    $$('[class*="detail_list_video--"]').forEach((u,i)=>{
      const t=(u.textContent||'').trim();
      console.log(' ['+i+']',(t.includes('未开始')?'⬜':t.includes('100%')?'✅':t.includes('%')?'📖':'  '),t.substring(0,80));
    });
  }
  const si=$$('.ant-menu-item,[class*=chapter],[class*=lesson],[class*=section]');
  if(si.length){si.slice(0,20).forEach((it,i)=>{const cl=it.className||'';console.log(' '+(cl.includes('active')||cl.includes('selected')?'✅':'  ')+'['+i+']',it.textContent?.trim()?.substring(0,50));});}
  console.groupEnd();alert('分析完成，按F12查看');
}

// ======================== 主循环 ========================
let mainLoop,popupLoop,speedLoop;
function startAutoStudy(){
  if(isGradePage()){startNextUnit();return;}
  if(!isVideoPage()){log('非视频页，请进入课程');return;}
  startVideoModeForce();
}
function startSpeedLoop(){if(speedLoop)clearInterval(speedLoop);speedLoop=setInterval(()=>{if(!STATE.running||STATE.videoEnded)return;applySpeed();},CONFIG.speedEnforceInterval);}
function pauseAutoStudy(){
  STATE.running=false;updateStatus({'wz-run-status':'已暂停'});
  document.getElementById('wz-btn-start').style.display='block';document.getElementById('wz-btn-start').textContent='继续刷课';document.getElementById('wz-btn-pause').style.display='none';
  clearInterval(mainLoop);clearInterval(popupLoop);clearInterval(speedLoop);
}
function stopAutoStudy(){
  STATE.running=false;updateStatus({'wz-run-status':'已停止'});
  document.getElementById('wz-btn-start').style.display='block';document.getElementById('wz-btn-start').textContent='开始刷课';document.getElementById('wz-btn-pause').style.display='none';document.getElementById('wz-btn-stop').style.display='none';
  clearInterval(mainLoop);clearInterval(popupLoop);clearInterval(speedLoop);
  if(STATE.playerInstance)try{getVE(STATE.playerInstance).playbackRate=1;}catch(e){}
}
function watchNew(){if(STATE._obs)STATE._obs.disconnect();const o=new MutationObserver(()=>{if(!STATE.running)return;const p=findVideo();if(p){const v=getVE(p);if(v&&!v._wzHooked){hookVideo(p);applySpeed();applyMute(CONFIG.autoMute);}}});o.observe(document.body,{childList:true,subtree:true});STATE._obs=o;}

// ======================== 登录 ========================
function showLoginTip(){
  if(!location.hash.includes('login'))return;const t=document.createElement('div');
  t.style.cssText='position:fixed;top:16px;left:50%;transform:translateX(-50%);background:#fff3cd;border:1px solid #ffc107;border-radius:8px;padding:10px 20px;z-index:99999;font-size:13px;text-align:center;max-width:400px;';
  t.innerHTML='<strong>嘉职院沃创刷课助手 v2.2</strong><br>请手动登录后进入课程。<br>Ctrl+Shift+S 开始/停止 | Ctrl+Shift+G 返回详情页';
  document.body.appendChild(t);setTimeout(()=>t.remove(),8000);
}

// ======================== 路由 ========================
function watchRoute(){
  let last=location.hash;
  setInterval(()=>{
    if(location.hash!==last){
      const prev=last;last=location.hash;log('路由:',prev,'→',location.hash);
      STATE.playerInstance=null;STATE.videoEnded=false;STATE.nextAttemptCount=0;
      if(STATE.running){
        updateInfo();
        if(isVideoPage()){startVideoModeForce();}
        else if(isGradePage()){setTimeout(()=>startNextUnit(),1500);}
      }
      if(location.hash.includes('login'))showLoginTip();
    }
  },500);
}

// ======================== GM & 快捷键 ========================
if(typeof GM_registerMenuCommand==='function'){GM_registerMenuCommand('重置配置',()=>{GM_setValue('woczx_speed',4);GM_setValue('woczx_smartSkip',true);GM_setValue('woczx_skipSpeed',2);GM_setValue('woczx_autoMute',true);GM_setValue('woczx_popupInterval',1000);GM_setValue('woczx_autoNext',true);GM_setValue('woczx_nextDelay',2);GM_setValue('woczx_showPanel',true);GM_setValue('woczx_debug',true);alert('已重置，请刷新');});}
document.addEventListener('keydown',e=>{
  if(e.ctrlKey&&e.shiftKey&&e.key==='S'){e.preventDefault();STATE.running?stopAutoStudy():startAutoStudy();}
  if(e.ctrlKey&&e.shiftKey&&e.key==='D'){e.preventDefault();debugPage();}
  if(e.ctrlKey&&e.shiftKey&&e.key==='N'){e.preventDefault();goToNextChapter();}
  if(e.ctrlKey&&e.shiftKey&&e.key==='G'){e.preventDefault();goToGradePage();}
});

// ======================== 初始化 ========================
function init(){
  console.log('[嘉职院刷课] v2.2 已加载 -',location.href);
  if(document.body&&document.body.children.length>0)setTimeout(initCore,1500);
  else document.addEventListener('DOMContentLoaded',()=>setTimeout(initCore,1500));
}
function initCore(){
  const toast=document.createElement('div');toast.style.cssText='position:fixed;top:10px;left:50%;transform:translateX(-50%);background:#52c41a;color:#fff;padding:8px 20px;border-radius:6px;z-index:999999;font-size:14px;font-weight:bold;box-shadow:0 2px 8px rgba(0,0,0,.2);';toast.textContent='✅ 嘉职院沃创刷课助手 v2.2 已就绪';document.body.appendChild(toast);setTimeout(()=>toast.remove(),2500);
  if(CONFIG.showPanel)createPanel();watchRoute();if(location.hash.includes('login'))showLoginTip();
  // ★ 自动开始：视频页直接开始，学习详情页自动选单元
  if(isVideoPage()){log('自动开始刷课');startVideoModeForce();}
  else if(isGradePage()){log('自动选择单元');startNextUnit();}
  log('初始化完成');
}
const w=unsafeWindow||window;w.__woczx__={start:startAutoStudy,stop:stopAutoStudy,debug:debugPage,goNext:goToNextChapter,goGrade:goToGradePage,nextUnit:startNextUnit,config:CONFIG};
init();
})();