const Ecs20140526 = require('@alicloud/ecs20140526').default
const $Ecs20140526 = require('@alicloud/ecs20140526')
const OpenApi = require('@alicloud/openapi-client').default;
const $OpenApi = require('@alicloud/openapi-client');
const $tea = require('@alicloud/tea-typescript')

const STATUS = {
    /**
     * 等待状态
     */
    pending: "pending",
    /**
     * 完成状态
     */
    fulfilled: "fulfilled"

}

function getLocalTimeToUTC() {
    var date = new Date()
    date.setMilliseconds(0)
    date.setMinutes(date.getMinutes() + date.getTimezoneOffset() + 3)
    return date
}

function dateFormat(fmt, date) {
    let ret;
    const opt = {
        "Y+": date.getFullYear().toString(),        // 年
        "m+": (date.getMonth() + 1).toString(),     // 月
        "d+": date.getDate().toString(),            // 日
        "H+": date.getHours().toString(),           // 时
        "M+": date.getMinutes().toString(),         // 分
        "S+": date.getSeconds().toString()          // 秒
        // 有其他格式化字符需求可以继续添加，必须转化成字符串
    };
    for (let k in opt) {
        ret = new RegExp("(" + k + ")").exec(fmt);
        if (ret) {
            fmt = fmt.replace(ret[1], (ret[1].length == 1) ? (opt[k]) : (opt[k].padStart(ret[1].length, "0")))
        };
    };
    return fmt;
}


class Client {

    /**
     * 使用AK&SK初始化账号Client
     * @param accessKeyId
     * @param accessKeySecret
     * @return Client
     * @throws Exception
     */
    static createClient(accessKeyId, accessKeySecret) {
        let config = new $OpenApi.Config({
            // 您的AccessKey ID
            accessKeyId: accessKeyId,
            // 您的AccessKey Secret
            accessKeySecret: accessKeySecret,
        });
        // 访问的域名
        config.endpoint = "ecs-cn-hangzhou.aliyuncs.com";

        return new Ecs20140526(config);
    }

    constructor() {
        this.band = 0
        this.status = STATUS.fulfilled;
        this.client = Client.createClient("LTAIUrvuHqj8pvry", "JLOVl0k8Ke0aaM8nLMMiUAZ3EiiqI4")
        // 看房服务器
        this.instanceId = 'i-wz9g1c3fleilk1n9q5uu'
        this.describeInstances()
        setInterval(() => {
            this.describeInstances()
        }, 15000);
    }

    /**
     * 查看实例详细信息
     */
    async describeInstances() {
        //https://help.aliyun.com/document_detail/25506.html#h2-url-4
        try {
            let describeInstancesRequest = new $Ecs20140526.DescribeInstancesRequest({
                regionId: "cn-shenzhen",
                instanceIds: "[\"" + this.instanceId + "\"]",
            });

            let response = await this.client.describeInstances(describeInstancesRequest);

            if (response.body.totalCount > 0) {
                if (response.body.instances.instance[0]) {
                    let band = response.body.instances.instance[0].internetMaxBandwidthOut
                    if (band) {
                        if (this.band) {
                            if (this.band != band) {
                                if (this.band < band) {
                                    console.log("带宽已升级:" + band + "MB")
                                } else if (this.band > band) {
                                    console.log("带宽已变化:" + band + "MB")
                                }
                            } else {
                                console.log('当前带宽:'+ band + "MB",'连接数:'+(this.conns || 0))
                            }
                            // 当带宽有变化时重置为初始状态
                            this.status = STATUS.fulfilled
                        }
                        if(!this.band){
                            console.log("带宽初始值:" + band + "MB")
                        }
                        this.band = band
                    }
                }
            }
        } catch (error) {
            console.log("获取带宽出错:", error)
        }
    }

    async modifyInstanceNetwork(band) {
        //https://help.aliyun.com/document_detail/25545.htm?spm=a2c4g.11186623.0.0.1ec05d7aOys0wB#t9937.html
        if (!band || band > 100 || this.band >= 100 || band<=this.band) {
            return
        }

        console.log("开始升级带宽:"+band)

        this.status = STATUS.pending

        try {
            var utc = getLocalTimeToUTC()
            var startTime = dateFormat('YYYY-mm-ddTHH:MMZ', utc)
            utc.setHours(utc.getHours() + 4)
            var endTime = dateFormat('YYYY-mm-ddTHHZ', utc)
            console.log(startTime, endTime)

            let modifyInstanceNetworkSpecRequest = new $Ecs20140526.ModifyInstanceNetworkSpecRequest({
                instanceId: this.instanceId,
                internetMaxBandwidthOut: band,
                startTime: startTime,
                endTime: endTime,
                autoPay: true,
            });
            let response = await this.client.modifyInstanceNetworkSpec(modifyInstanceNetworkSpecRequest);

            console.log(response)
        } catch (error) {

            this.status = STATUS.fulfilled

            console.log("升级带宽出错:", error)
        }
    }

    async autoUpdate(conns) {
        this.conns = conns
        if (this.status == STATUS.pending) {
            return
        }

        if (conns >= 300 && conns < 800) {
            await this.modifyInstanceNetwork(50)
        } else if (conns >= 800 && conns < 1500) {
            await this.modifyInstanceNetwork(75)
        } else if (conns > 1500) {
            await this.modifyInstanceNetwork(100)
        }
    }
}

const client = new Client()

module.exports = client