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/* global CONFIG */

(function(window, document) {

// 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 => {

// eslint-disable-next-line no-console

console.error('Failed to create', error);

reject(error);

});

}

}).catch((error) => {

// eslint-disable-next-line no-console

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) => {

// eslint-disable-next-line no-console

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 Host

function validHost() {

if (CONFIG.web_analytics.leancloud.ignore_local) {

var hostname = window.location.hostname;

if (hostname === 'localhost' || hostname === '127.0.0.1') {

return false;

}

}

return true;

}

// 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, 10) <= 86400000) {

return false;

}

}

localStorage.setItem(key, new Date().getTime().toString());

return true;

}

function addCount(Counter) {

var enableIncr = CONFIG.web_analytics.enable && validHost();

var getterArr = [];

var incrArr = [];

// 请求 PV 并自增

var pvCtn = document.querySelector('#leancloud-site-pv-container');

if (pvCtn) {

var pvGetter = getRecord(Counter, 'site-pv').then((record) => {

enableIncr && incrArr.push(buildIncrement(record.objectId));

var ele = document.querySelector('#leancloud-site-pv');

if (ele) {

ele.innerText = (record.time || 0) + (enableIncr ? 1 : 0);

pvCtn.style.display = 'inline';

}

});

getterArr.push(pvGetter);

}

// 请求 UV 并自增

var uvCtn = document.querySelector('#leancloud-site-uv-container');

if (uvCtn) {

var uvGetter = getRecord(Counter, 'site-uv').then((record) => {

var incrUV = validUV() && enableIncr;

incrUV && incrArr.push(buildIncrement(record.objectId));

var ele = document.querySelector('#leancloud-site-uv');

if (ele) {

ele.innerText = (record.time || 0) + (incrUV ? 1 : 0);

uvCtn.style.display = 'inline';

}

});

getterArr.push(uvGetter);

}

// 如果有页面浏览数节点，则请求浏览数并自增

var viewCtn = document.querySelector('#leancloud-page-views-container');

if (viewCtn) {

var path = eval(CONFIG.web_analytics.leancloud.path || 'window.location.pathname');

var target = decodeURI(path.replace(/\/*(index.html)?$/, '/'));

var viewGetter = getRecord(Counter, target).then((record) => {

enableIncr && incrArr.push(buildIncrement(record.objectId));

var ele = document.querySelector('#leancloud-page-views');

if (ele) {

ele.innerText = (record.time || 0) + (enableIncr ? 1 : 0);

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 appId = CONFIG.web_analytics.leancloud.app_id;

var appKey = CONFIG.web_analytics.leancloud.app_key;

var serverUrl = CONFIG.web_analytics.leancloud.server_url;

if (!appId) {

throw new Error('LeanCloud appId is empty');

}

if (!appKey) {

throw new Error('LeanCloud appKey is empty');

}

function fetchData(api_server) {

var Counter = (method, url, data) => {

return fetch(`${api_server}/1.1${url}`, {

method,

headers: {

'X-LC-Id' : appId,

'X-LC-Key' : appKey,

'Content-Type': 'application/json'

},

body: JSON.stringify(data)

});

};

addCount(Counter);

}

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

if (apiServer) {

fetchData(apiServer);

} else {

fetch('https://app-router.leancloud.cn/2/route?appId=' + appId)

.then(resp => resp.json())

.then((data) => {

if (data.api_server) {

fetchData('https://' + data.api_server);

}

});

}

})(window, document);