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var md5=this.md5;

function isServerId(clientId){
    return  JSON.parse(component.getCompMqttClientIdList()).indexOf(clientId) > -1
}

function getPkDn(clientId){
    var arr=clientId.split("_");
    return {
        pk:arr[0],
        dn:arr[1]
    };
}

function auth(head,type,payload){
    if(isServerId(payload.clientid)){
        return {
            type:"serverAuth",
            data:{
                productKey:"pd",
                deviceName:"dn",
            }
        };
    }


    var arr= payload.clientid.split("_");
    if(arr.length<3){
        throw new Error("incorrect clientid：" + payload.clientid);
    }

    var pk=arr[0];
    var dn=arr[1];
    var model=arr[2];
    var pwd=md5("xdkKUymrEGSCYWswqCvSPyRSFvH5j7CU"+payload.clientid);
    if(pwd!=payload.password){
        throw new Error("incorrect password：" + pwd);
    }
    return {
        type:"register",
        data:{
            productKey:pk,
            deviceName:dn,
            model:model
        }
    };
}

function acl(head,type,payload){
    var _topic = payload.topic;

    if(isServerId(payload.clientid)){
        return {
            type: "acl",
            data:{
                productKey:"pd",
                deviceName:"dn",
            }
        };
    }

    // 客户端订阅处理
    if (/^\/sys\/.+\/.+\/c\/#/i.test(_topic)) {
	  return subscribe(head,type,payload);
    }

    // 服务端订阅处理
    if (/^\/sys\/.+\/.+\/s\/.*/i.test(_topic)) {
	  return subscribe(head,type,payload);
    }

}

function register(head,type,payload){
    var auth= payload;
    var arr= auth.clientid.split("_");
    if(arr.length<3){
        throw new Error("incorrect clientid：" + auth.clientid);
    }

    var pk=arr[0];
    var dn=arr[1];
    var model=arr[2];
    var pwd=md5("xdkKUymrEGSCYWswqCvSPyRSFvH5j7CU"+auth.clientid);
    if(pwd!=auth.password){
        throw new Error("incorrect password：" + pwd);
    }
    return {
        type:"register",
        data:{
            productKey:pk,
            deviceName:dn,
            model:model
        }
    };
}

function subRegister(topic,parent, payload){
    if(!topic){
        throw new Error("topic is blank")
    }


    var params= payload.params;

    var reply=
        {
            productKey: parent.productKey,
            deviceName: parent.deviceName,
            mid: "0",
            content:{
                topic: topic.replace("/s/","/c/")+"_reply",
                payload: JSON.stringify({
                    id: payload.id,
                    code: 0,
                    data: {
                        "productKey":params.productKey,
                        "deviceName":params.deviceName
                    }
                })
            }
        };

    return {
        type:"register",
        data:{
            productKey:parent.productKey,
            deviceName:parent.deviceName,
            subDevices:[{
                productKey:params.productKey,
                deviceName:params.deviceName,
                model:params.model
            }]
        },
        action:{
            type:"ack",
            content:JSON.stringify(reply)
        }
    };
}

function disconnect(head,type,payload){
    var clientId = payload.clientid
    var device=getPkDn(clientId);
    return {
        type:"state",
        data:{
            productKey:device.pk,
            deviceName:device.dn,
            state:"offline"
        }
    }
}

function connect(head,type,payload) {
    var clientId = payload.clientid
    var device = getPkDn(clientId);
    return {
        type: "state",
        data: {
            productKey: device.pk,
            deviceName: device.dn,
            state: "online"
        }
    }
}

function unsubscribe(head,type,payload){
    var topic = payload.topic;

    if(isServerId(payload.clientid)){
        return {
            type: "acl",
            data:{
                productKey:"pd",
                deviceName:"dn",
            }
        };
    }

    var arr= topic.split('/');
    if(arr.length<6){
        throw new Error("incorrect topic: "+topic)
    }

    var pk=arr[2];
    var dn=arr[3];

    return {
        type:"state",
        data:{
            productKey: pk,
            deviceName: dn,
            state:"offline"
        }
    }
}

function subscribe(head,type,payload){
    var topic = payload.topic;

    if(isServerId(payload.clientid)){
        return {
            type: "acl",
            data:{
                productKey:"pd",
                deviceName:"dn",
            }
        };
    }

    var arr= topic.split('/');
    if(arr.length<6){
        throw new Error("incorrect topic: "+topic)
    }
    var pk=arr[2];
    var dn=arr[3];

    return {
        type: "state",
        data: {
            productKey: pk,
            deviceName: dn,
            state: "online"
        }
    }
}

var messageHandler = {
    "/sys/client/connected":connect,
    "/sys/client/disconnected":disconnect,
    "/mqtt/auth":auth,
    "/mqtt/acl":acl,
    "/sys/session/subscribed":subscribe,
    "/sys/session/unsubscribed":unsubscribe
}

//必须提供onReceive方法
this.onReceive=function(head,type,payload){
    payload=JSON.parse(payload);

    var result = {};
    var topic = head.topic;
    if(!topic) {
        return result;
    }

    var fun = messageHandler[topic];

    if(fun){
        result = fun(head,type,payload)
    }else{
        var arr= topic.split('/');
        if(arr.length<6){
            throw new Error("incorrect topic: "+topic)
        }
        var pk=arr[2];
        var dn=arr[3];

        //子设备注册
        if(topic.endsWith('/register')){
            result =  subRegister(topic,{productKey:pk,deviceName:dn}, payload);
        }
        else {
            //数据上报
            result = {
                type: "report",
                data: {
                    productKey: pk,
                    deviceName: dn,
                    mid: payload.id,
                    content: {
                        topic: topic,
                        payload: payload
                    }
                }
            }
        }

    }
    return result;

}

this.onRegistered=function(regInfo,result){
}