var mid = 1;

function getMid() {
    mid++;
    if (mid > 10000) {
        mid = 1;
    }
    return mid + "";
}

this.decode = function (msg) {
    //对msg进行解析，并返回物模型数据
    var content = msg.content;
    var topic = content.topic;
    var payload = content.payload;
    var identifier = topic.substring(topic.lastIndexOf("/") + 1);

    //透传上报
    if (topic.endsWith("/event/rawReport")) {
        var rst = component.transparentDecode(payload.params);
        if (!rst) {
            return null;
        }
        rst.occur = new Date().getTime();
        rst.time = new Date().getTime();
        return rst;
    }

    if (topic.endsWith("/property/post")) {
        //属性上报
        return {
            mid: msg.mid,
            productKey: msg.productKey,
            deviceName: msg.deviceName,
            type: "property",
            identifier: "report", //属性上报
            occur: new Date().getTime(), //时间戳，设备上的事件或数据产生的本地时间
            time: new Date().getTime(), //时间戳，消息上报时间
            data: payload.params,
        };
    } else if (topic.indexOf("/ota/") > 0) {
        //事件上报
        return {
            mid: msg.mid,
            productKey: msg.productKey,
            deviceName: msg.deviceName,
            type: "ota",
            identifier: "ota",
            occur: new Date().getTime(),
            time: new Date().getTime(),
            data: payload.params,
        };
    } else if (topic.indexOf("/event/") > 0) {
        //事件上报
        return {
            mid: msg.mid,
            productKey: msg.productKey,
            deviceName: msg.deviceName,
            type: "event",
            identifier: identifier,
            occur: new Date().getTime(),
            time: new Date().getTime(),
            data: payload.params,
        };
    } else if (topic.endsWith("/service/property/set_reply")) {
        //属性设置回复
        return {
            mid: msg.mid,
            productKey: msg.productKey,
            deviceName: msg.deviceName,
            type: "property",
            identifier: identifier,
            occur: new Date().getTime(),
            time: new Date().getTime(),
            code: payload.code
        };
    } else if (topic.endsWith("/config/set_reply")) {
        //设备配置设置回复
        return {
            mid: msg.mid,
            productKey: msg.productKey,
            deviceName: msg.deviceName,
            type: "config",
            identifier: "set_reply",
            occur: new Date().getTime(),
            time: new Date().getTime(),
            code: payload.code
        };
    } else if (topic.endsWith("/config/get")) {
        //设备配置获取
        return {
            mid: msg.mid,
            productKey: msg.productKey,
            deviceName: msg.deviceName,
            type: "config",
            identifier: "get",
            occur: new Date().getTime(),
            time: new Date().getTime(),
            data: {},
        };
    } else if (topic.endsWith("_reply")) {
        //服务回复
        return {
            mid: msg.mid,
            productKey: msg.productKey,
            deviceName: msg.deviceName,
            type: "service",
            identifier: identifier,
            occur: new Date().getTime(),
            time: new Date().getTime(),
            code: payload.code,
            data: payload.data,
        };
    }
    return null;
};

this.encode = function (service, device) {
    var deviceMid = getMid();
    var method = "thing.service.";
    var topic = "/sys/" + service.productKey + "/" + service.deviceName + "/c/service/";
    var params = {};

    //透传下发
    if (device.transparent) {
        var rst = component.transparentEncode(service, device);
        topic = "/sys/" + rst.productKey + "/" + rst.deviceName + "/c/service/rawSend";
        params.model = rst.content.model;
        params.deviceName = rst.content.deviceName;
        params.data = rst.content.data;

        return {
            productKey: rst.productKey,
            deviceName: rst.deviceName,
            mid: rst.mid,
            content: {
                topic: topic,
                payload: JSON.stringify({
                    id: rst.mid,
                    method: method + "rawSend",
                    params: params
                })
            }
        }

    }

    var type = service.type;
    var identifier = service.identifier;

    if (type == "property") {
        method += "property." + identifier;
        topic += "property/" + identifier;
    } else if (type == "service") {
        method += identifier;
        topic += identifier;
    } else if (type == "ota") {
        method += identifier;
        topic = "/ota/device/upgrade/" + service.productKey + "/" + service.deviceName;
    } else if (type == "config") {
        //设备配置下发
        method += identifier;
        topic = "/sys/" + service.productKey + "/" + service.deviceName + "/c/config/" + identifier;
    } else if (type = "lifetime") {
        //子设备注销下发
        method += identifier;
        topic = "/sys/" + service.productKey + "/" + service.deviceName + "/c/deregister";
    }
    if (type == "property" && identifier == "get") {
        var listParams = []
        for (var p in service.params) {
            listParams.push(service.params[p]);
        }
        return {
            productKey: service.productKey,
            deviceName: service.deviceName,
            mid: deviceMid,
            content: {
                topic: topic,
                payload: JSON.stringify({
                    id: deviceMid,
                    method: method,
                    params: listParams
                })
            }
        }
    } else {
        for (var p in service.params) {
            params[p] = service.params[p];
        }
        return {
            productKey: service.productKey,
            deviceName: service.deviceName,
            mid: deviceMid,
            content: {
                topic: topic,
                payload: JSON.stringify({
                    id: deviceMid,
                    method: method,
                    params: params
                })
            }
        }

    }


};