;(function(){

  let pageStartTime = performance.now();
  let totalActiveTime = 0;
  let segmentStartTime = pageStartTime;


  let sendlist = [];

  //获取referer
  let referer = document.referrer;

  //获取pageurl和pagetitle
  let page_url = window.location.href;
  let page_title = document.title;
  
  //获取查询字符串
  let query = window.location.search;
  let queryObject = {};
  if (query) {
    const urlParams = new URLSearchParams(query);
    for (const [key, value] of urlParams.entries()) {
      queryObject[key] = value;
    }
    query = JSON.stringify(queryObject);
  }

  //
  let os = getOperatingSystem();
  let browser = getBrowserInfo();
  let device = getDeviceInfo();
  let screen_resolution = getScreenResolution();
  
  let site_referer = "";
  //需要判断是否当前域名访问
  if (referer.startsWith(window.location.origin)) {
    //这里获取的是上一个页面，除去当前域名的地址
    site_referer = referer.replace(window.location.origin, "");
  }

  let content_type = getMetaContent('content_type');
  let content_id = getMetaContent('content_id');
  
  //获取当前时间  需要2023-07-05 00:00:00 格式
  let page_enter_time = getCurrentTimeString();

  sendlist.push("referer="+encodeURIComponent(referer));
  sendlist.push("page_url="+encodeURIComponent(page_url));
  sendlist.push("page_title="+encodeURIComponent(page_title));
  sendlist.push("query_params="+encodeURIComponent(query));
  sendlist.push("client_os="+encodeURIComponent(os));
  sendlist.push("client_browser="+encodeURIComponent(browser));
  sendlist.push("client_device="+encodeURIComponent(device));
  sendlist.push("client_screen_resolution="+encodeURIComponent(screen_resolution));
  sendlist.push("site_referer="+encodeURIComponent(site_referer));
  sendlist.push("page_enter_time="+encodeURIComponent(page_enter_time));
  sendlist.push("content_type="+encodeURIComponent(content_type));
  sendlist.push("content_id="+encodeURIComponent(content_id));

  sendlist = sendlist.join('&');
  let httpRequest = new XMLHttpRequest();
  httpRequest.open("POST", "/api/statistics/visit/report/", true);
  httpRequest.setRequestHeader("Content-Type", "application/x-www-form-urlencoded");
  httpRequest.send(sendlist);
  httpRequest.onreadystatechange = () => {
    if (httpRequest.readyState === 4 && httpRequest.status === 200) {
      
    } else {
      if (httpRequest.status !== 200) {
        console.error(httpRequest.status, "data report error");
      }
    }
  }



  document.addEventListener('visibilitychange', function() {
      if (document.hidden) {
          // 页面隐藏，暂停计时
          totalActiveTime += (performance.now() - segmentStartTime);
      } else {
          // 页面再次可见，重新开始分段计时
          segmentStartTime = performance.now();
      }
  });

  window.addEventListener('beforeunload', function() {
      totalActiveTime += (performance.now() - segmentStartTime);
      const visitDuration = Math.round(totalActiveTime); // 转换为毫秒整数

      // 使用 Beacon API 发送数据
      const data = new Blob([JSON.stringify({
          visit_duration: visitDuration,
      })], { type: 'application/json' });
      navigator.sendBeacon('/api/statistics/visit/report/update/', data);
  });

  function getOperatingSystem() {
      const userAgent = navigator.userAgent;
      
      // Windows 11 在 User Agent 中可能仍然显示为 NT 10.0，但可以通过其他方式检测
      // 目前，Windows 11 在 User Agent 中的显示方式可能不同，具体取决于浏览器
      if (userAgent.includes('Windows NT 11.0')) {
          return 'Windows 11';
      } 
      // 一些情况下，Windows 11 仍显示为 NT 10.0，但可通过其他特征检测
      else if (userAgent.includes('Windows NT 10.0')) {
          // 尝试检测 Windows 11 特有的特征
          // 由于浏览器厂商实现不同，这种方法可能不完全准确
          return 'Windows 10/11';
      }
      
      if (userAgent.includes('Windows NT 6.3')) return 'Windows 8.1';
      if (userAgent.includes('Windows NT 6.2')) return 'Windows 8';
      if (userAgent.includes('Windows NT 6.1')) return 'Windows 7';
      if (userAgent.includes('Mac OS X')) return 'Mac OS';
      if (userAgent.includes('Android')) return 'Android';
      if (userAgent.includes('iPhone') || userAgent.includes('iPad')) return 'iOS';
      if (userAgent.includes('Linux')) return 'Linux';
      
      return 'Unknown';
  }

  function getBrowserInfo() {
      const userAgent = navigator.userAgent;
      
      if (userAgent.includes('Chrome') && !userAgent.includes('Edg')) return 'Chrome';
      if (userAgent.includes('Firefox')) return 'Firefox';
      if (userAgent.includes('Safari') && !userAgent.includes('Chrome')) return 'Safari';
      if (userAgent.includes('Edg')) return 'Edge';
      if (userAgent.includes('MSIE') || userAgent.includes('Trident')) return 'IE';
      
      return 'Unknown';
  }

  function getDeviceInfo() {
      const userAgent = navigator.userAgent.toLowerCase();
      if (/(tablet|ipad|playbook|silk)|(android(?!.*mobi))/i.test(userAgent)) {
          return 'Tablet';
      }
      if (/mobile|android|iphone|ipod|ipad|iemobile|wpdesktop/i.test(userAgent)) {
          return 'Mobile';
      }
      return 'Desktop';
  }

  function getScreenResolution() {
      return `${window.screen.width}x${window.screen.height}`;
  }

  function getCurrentTimeString() {
    const now = new Date();
    
    // 获取年月日时分秒
    const year = now.getFullYear();
    const month = String(now.getMonth() + 1).padStart(2, '0'); // 月份从0开始，需+1
    const day = String(now.getDate()).padStart(2, '0');
    const hours = String(now.getHours()).padStart(2, '0');
    const minutes = String(now.getMinutes()).padStart(2, '0');
    const seconds = String(now.getSeconds()).padStart(2, '0');
    
    // 拼接成目标格式
    return `${year}-${month}-${day} ${hours}:${minutes}:${seconds}`;
  }

  function getMetaContent(name) {
      // 查找页面中name属性等于指定值的meta标签
      const metaTag = document.querySelector(`meta[name="${name}"]`);
      // 如果找到meta标签，返回其content属性值；否则返回空字符串
      return metaTag ? metaTag.getAttribute('content') || '' : '';
  }

})();