<script defer>
  (function () {
    // 查询存储的记录
    function getRecord(Counter, target) {
      return new Promise(function (resolve, reject) {
        Counter('get', '/classes/Counter?where=' + encodeURIComponent(JSON.stringify({target})))
          .then(resp => resp.json())
          .then(({results, code, error}) => {
            if (code === 401) {
              throw error;
            }
            if (results && results.length > 0) {
              var record = results[0];
              resolve(record);
            } else {
              Counter('post', '/classes/Counter', {target, time: 0})
                .then(resp => resp.json())
                .then((record, error) => {
                  if (error) {
                    throw error;
                  }
                  resolve(record);
                }).catch(error => {
                console.error('Failed to create', error);
                reject(error);
              });
            }
          }).catch((error) => {
          console.error('LeanCloud Counter Error:', error);
          reject(error);
        });
      })
    }

    // 发起自增请求
    function increment(Counter, incrArr) {
      return new Promise(function (resolve, reject) {
        Counter('post', '/batch', {
          "requests": incrArr
        }).then((res) => {
          res = res.json();
          if (res.error) {
            throw res.error;
          }
          resolve(res);
        }).catch((error) => {
          console.error('Failed to save visitor count', error);
          reject(error);
        });
      });
    }

    // 构建自增请求体
    function buildIncrement(objectId) {
      return {
        "method": "PUT",
        "path": `/1.1/classes/Counter/${ objectId }`,
        "body": {
          "time": {
            '__op': 'Increment',
            'amount': 1
          }
        }
      }
    }

    // 校验是否为有效的 UV
    function validUV() {
      var key = 'LeanCloud_UV_Flag';
      var flag = localStorage.getItem(key);
      if (flag) {
        // 距离标记小于 24 小时则不计为 UV
        if (new Date().getTime() - parseInt(flag) <= 86400000) {
          return false;
        }
      }
      localStorage.setItem(key, new Date().getTime().toString());
      return true;
    }

    function addCount(Counter) {
      var enableIncr = '<%= theme.web_analytics.enable %>' === 'true' && window.location.hostname !== 'localhost';
      var getterArr = [];
      var incrArr = [];

      // 请求 PV 并自增
      var pvCtn = document.querySelector('#leancloud-site-pv-container');
      if (pvCtn || enableIncr) {
        var pvGetter = getRecord(Counter, 'site-pv').then((record) => {
          incrArr.push(buildIncrement(record.objectId))
          var ele = document.querySelector('#leancloud-site-pv');
          if (ele) {
            ele.innerText = record.time + 1;
            if (pvCtn) {
              pvCtn.style.display = 'inline';
            }
          }
        });
        getterArr.push(pvGetter);
      }

      // 请求 UV 并自增
      var uvCtn = document.querySelector('#leancloud-site-uv-container');
      if (uvCtn || enableIncr) {
        var uvGetter = getRecord(Counter, 'site-uv').then((record) => {
          var vuv = validUV();
          vuv && incrArr.push(buildIncrement(record.objectId))
          var ele = document.querySelector('#leancloud-site-uv');
          if (ele) {
            ele.innerText = record.time + (vuv ? 1 : 0);
            if (uvCtn) {
              uvCtn.style.display = 'inline';
            }
          }
        });
        getterArr.push(uvGetter);
      }

      // 如果是文章，请求文章的浏览数，并自增
      if ('<%= is_post() %>' === 'true') {
        var viewCtn = document.querySelector('#leancloud-post-views-container');
        if (viewCtn || enableIncr) {
          var target = decodeURI('<%= url_for(page.path) %>');
          var viewGetter = getRecord(Counter, target).then((record) => {
            incrArr.push(buildIncrement(record.objectId))
            if (viewCtn) {
              var ele = document.querySelector('#leancloud-post-views');
              if (ele) {
                ele.innerText = (record.time || 0) + 1;
                viewCtn.style.display = 'inline';
              }
            }
          });
          getterArr.push(viewGetter);
        }
      }

      // 如果启动计数自增，批量发起自增请求
      if (enableIncr) {
        Promise.all(getterArr).then(() => {
          incrArr.length > 0 && increment(Counter, incrArr);
        })
      }
    }

    var app_id = '<%= theme.web_analytics.leancloud.app_id %>'
    var app_key = '<%= theme.web_analytics.leancloud.app_key %>'
    var server_url = '<%= theme.web_analytics.leancloud.server_url %>'

    function fetchData(api_server) {
      var Counter = (method, url, data) => {
        return fetch(`${ api_server }/1.1${ url }`, {
          method,
          headers: {
            'X-LC-Id': app_id,
            'X-LC-Key': app_key,
            'Content-Type': 'application/json',
          },
          body: JSON.stringify(data)
        });
      };

      addCount(Counter);
    }

    var api_server = app_id.slice(-9) !== '-MdYXbMMI' ? server_url : `https://${ app_id.slice(0, 8).toLowerCase() }.api.lncldglobal.com`;

    if (api_server) {
      fetchData(api_server);
    } else {
      fetch('https://app-router.leancloud.cn/2/route?appId=' + app_id)
        .then(resp => resp.json())
        .then(({api_server}) => {
          fetchData('https://' + api_server);
        });
    }
  })();
</script>
