//获取签名信息
const getAccessToken = () => {
	const signType = 'MD5', //签名方式SHA1,MD5
		appId = 'wx68c38401877ba604',
		appName = '4evol8uuwyuxsims', //应用标识，此标识是提前分配给调用系统的。
		privateKey = 'd3db27c0-26a0-4d8a-8707-65f374e02c7a',
		timeStamp = Date.now().toString(), //时间戳
		nonce = randomString(16), //随机数
		signature = signStr(nonce, timeStamp, appName, privateKey, signType), //生成私域签名
		title = document.title,
		desc = document.title,
		imgUrl = 'https://www.xacom.edu.cn/_upload/tpl/00/8a/138/template138/images/WXIcon.jpg';
	let access_token = JSON.stringify({ signType, appName, timeStamp, nonce, signature });
	access_token = CryptoJS.enc.Utf8.parse(access_token);
	access_token = CryptoJS.enc.Base64.stringify(access_token);
	return { appId, appName, privateKey, timeStamp, nonce, signature, access_token, title, desc, imgUrl };
};
window.addEventListener('DOMContentLoaded', async () => {
	const useConfig = getAccessToken();
	const { appId, access_token } = useConfig;
	const url = `/_weixinApi/ordinary/jssdk?appid=${appId}&access_token=${access_token}&initJsApi=false`;
	fetch(url)
		.then(e => {
			return e.text();
		})
		.then(res => {
			//处理返回数据
			let requestData = res.slice(res.indexOf('{'));
			requestData = JSON.parse(requestData);
			//wx真实签名替换掉私有签名
			requestData = Object.assign(useConfig, requestData);
			WXconfig(requestData);
		})
		.catch(err => console.log(err));
});
//初始化js-sdk 更新分享配置
function WXconfig(data) {
	const { appId, timestamp, nonceStr, signature, title, desc, imgUrl } = data;
	wx.config({
		debug: false,
		appId: appId,
		timestamp: timestamp,
		nonceStr: nonceStr,
		signature: signature,
		jsApiList: ['onMenuShareTimeline', 'onMenuShareAppMessage'],
	});
	wx.ready(function () {
		console.log('ready');
		//需在用户可能点击分享按钮前就先调用
		wx.onMenuShareTimeline({
			title: title,
			desc: desc,
			link: window.location.href,
			imgUrl: imgUrl,
			success: function () {
				console.log('朋友圈成功', window.location.href);
			},
		});
		wx.onMenuShareAppMessage({
			title: title,
			desc: desc,
			link: window.location.href,
			imgUrl: imgUrl,
			success: function () {
				console.log('联系人成功', window.location.href);
			},
		});
	});
	wx.error(function (err) {
		console.log('wxError:', err);
	});
}
//随机字符串
function randomString(e = 32) {
	const t = 'ABCDEFGHJKMNPQRSTWXYZabcdefhijkmnprstwxyz2345678',
		a = t.length;
	let n = '';
	for (i = 0; i < e; i++) n += t.charAt(Math.floor(Math.random() * a));
	return n;
}
//私域签名
function signStr(nonce, timeStamp, appName, privateKey, authType) {
	const tmpStr = [nonce, timeStamp, appName, privateKey].sort().join('');
	if (authType == 'MD5') {
		return CryptoJS.MD5(tmpStr).toString().replace(/[\s]+/g, '').toUpperCase();
	}
	return CryptoJS.SHA1(tmpStr).toString().replace(/[\s]+/g, '').toUpperCase();
}