<script defer>

  const LCCounter = {
    app_id: '<%= theme.analytics.leancloud.app_id %>',
    app_key: '<%= theme.analytics.leancloud.app_key %>',
    custom_api_server: '<%= theme.analytics.leancloud.custom_api_server %>',

    // 查询存储的记录
    getRecord(Counter, url, title) {
      return new Promise(function (resolve, reject) {
        Counter('get', '/classes/Counter?where=' + encodeURIComponent(JSON.stringify({url})))
          .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', {url, title: title, times: 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
    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
    buildIncrement(objectId) {
      return {
        "method": "PUT",
        "path": `/1.1/classes/Counter/${ objectId }`,
        "body": {
          "times": {
            '__op': 'Increment',
            'amount': 1
          }
        }
      }
    },

    // 校验是否为有效的 UV
    validUV() {
      var key = 'LeanCloudUVTimestamp';
      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;
    },

    addCount(Counter) {
      var enableIncr = '<%= theme.analytics.enable %>' === 'true' && window.location.hostname !== 'localhost';
      enableIncr = true;
      var getterArr = [];
      var incrArr = [];
      // 请求 PV 并自增
      var pvCtn = document.querySelector('#lc-sv');
      if (pvCtn || enableIncr) {
        var pvGetter = this.getRecord(Counter, '<%- config.url %>' + '/#lc-sv', 'Visits').then((record) => {
          incrArr.push(this.buildIncrement(record.objectId))
          var eles = document.querySelectorAll('#lc-sv #number');
          if (eles.length > 0) {
            eles.forEach((el,index,array)=>{
              el.innerText = record.times + 1;
              if (pvCtn) {
                pvCtn.style.display = 'inline';
              }
            })
          }
        });
        getterArr.push(pvGetter);
      }

      // 请求 UV 并自增
      var uvCtn = document.querySelector('#lc-uv');
      if (uvCtn || enableIncr) {
        var uvGetter = this.getRecord(Counter, '<%- config.url %>' + '/#lc-uv', 'Visitors').then((record) => {
          var vuv = this.validUV();
          vuv && incrArr.push(this.buildIncrement(record.objectId))
          var eles = document.querySelectorAll('#lc-uv #number');
          if (eles.length > 0) {
            eles.forEach((el,index,array)=>{
              el.innerText = record.times + (vuv ? 1 : 0);
              if (uvCtn) {
                uvCtn.style.display = 'inline';
              }
            })
          }
        });
        getterArr.push(uvGetter);
      }

      // 请求文章的浏览数，如果是当前页面就自增
      var allPV = document.querySelectorAll('#lc-pv');
      if (allPV.length > 0 || enableIncr) {
        for (i = 0; i < allPV.length; i++) {
          let pv = allPV[i];
          let title = pv.getAttribute('data-title');
          var url = '<%- config.url %>' + pv.getAttribute('data-path');
          if (url) {
            var viewGetter = this.getRecord(Counter, url, title).then((record) => {
              // 是当前页面就自增
              let curPath = window.location.pathname;
              if (curPath.includes('index.html')) {
                curPath = curPath.substring(0, curPath.lastIndexOf('index.html'));
              }
              if (pv.getAttribute('data-path') == curPath) {
                incrArr.push(this.buildIncrement(record.objectId));
              }
              if (pv) {
                var ele = pv.querySelector('#lc-pv #number');
                if (ele) {
                  if (pv.getAttribute('data-path') == curPath) {
                    ele.innerText = (record.times || 0) + 1;
                  } else {
                    ele.innerText = record.times || 0;
                  }
                  pv.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 && this.increment(Counter, incrArr);
        })
      }

    },


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

    refreshCounter() {
      var api_server = this.custom_api_server || `https://${ this.app_id.slice(0, 8).toLowerCase() }.api.lncldglobal.com`;
      if (api_server) {
        this.fetchData(api_server);
      } else {
        fetch('https://app-router.leancloud.cn/2/route?appId=' + this.app_id)
          .then(resp => resp.json())
          .then(({api_server}) => {
            this.fetchData('https://' + api_server);
          });
      }
    }

  };

  LCCounter.refreshCounter();

  document.addEventListener('pjax:complete', function () {
    LCCounter.refreshCounter();
  });
</script>
