// const { MongoClient } = require('mongodb');
var express = require('express');
var router = express.Router();
const querystring = require('querystring');

var us = {
    mongo: require('mongodb'),
    client: null // 用于存储 MongoClient 实例
};

// 初始化 MongoDB 连接
us.initMongoConnection = async function (host, database) {
    if (!us.client) {
        const url = host; // MongoDB 连接地址
        us.client = new us.mongo.MongoClient(url, {
            useNewUrlParser: true,
            useUnifiedTopology: true,
            maxPoolSize: 10000, // 设置连接池没有上限
            serverSelectionTimeoutMS: 5000, // 服务器选择超时
            socketTimeoutMS: 45000 // 套接字超时
        });
        try {
            await us.client.connect();
        } catch (err) {
            console.error("MongoDB 连接失败", err);
            throw err; // 抛出错误以便调用者处理
        }
    }
    return us.client.db(database); // 返回数据库实例
}

async function updateUserData(host, database, cename, data, res) {
    const db = await us.initMongoConnection(host, database); // 连接数据库
    try {
        const collection = db.collection(cename); // collection设置
        const dateKey = Object.keys(data)[0]; // 获取日期键
        const username = Object.keys(data[dateKey])[0]; // 获取用户ID
        console.log(`更新用户数据：${username}`);
        // 使用 upsert 更新或插入文档
        await collection.updateOne(
            { [dateKey]: { $exists: true }, [`${dateKey}.${username}`]: { $exists: true } }, // 查询条件
            {
                $push: { [`${dateKey}.${username}`]: data[dateKey][username] }, // 将用户数据推入数组
            },
            { upsert: true } // 如果没有数据，默认创建一条数据
        );
        console.log('数据更新成功');
        res.end(JSON.stringify({ status: "1" }))
    } catch (err) {
        res.end(JSON.stringify({ status: "0" }))
        console.error('更新失败', err);
    }
}

/* 
// 示例调用
updateUserData("mongodb://root:usestudio-1@123.58.32.151:11641?authSource=admin", "cocolog", "applog", {
    "2025-03-24": {
        "username":
        {
            userid: "",
            date: "",
            appname: "",
            status: ""
        }
    }
});
*/

//查找有无学校
router.route('/updateUserData').all((req, res, next) => {
    // var json = queryString(req.url);
    let accountNumber = encodeURIComponent(req.body[0].accountNumber)
    let today = new Date();
    let date = today.getFullYear() + '-' + (today.getMonth() + 1).toString().padStart(2, '0') + '-' + today.getDate().toString().padStart(2, '0');
    // mongodb://root:usestudio-1@123.58.32.151:11641?authSource=admin
    updateUserData("mongodb://root:usestudio-1@172.16.9.240:27017?authSource=admin", "cocolog", "applog", {
        [date]: {
            [accountNumber]: // 使用变量username作为键
            {
                userid: req.body[0].userid,
                username: req.body[0].username,
                date: today,
                appname: req.body[0].appname,
                appid: req.body[0].appid,
                status: req.body[0].status
            }
        }
    }, res);
    // console.log(json);
    // res.end(JSON.stringify([{ status: "0" }]));
});


queryString = function (url) {
    var a = url.split("?");
    var json = querystring.parse(a[1])
    return json;
}


module.exports = router;