module(...,package.seeall)

--数据发送的消息队列
local msgQueue = {}

--这个函数用于将MQTT消息插入到一个消息队列
local function insertMsg(topic,payload,qos,user)
    table.insert(msgQueue,{t=topic,p=payload,q=qos,user=user})
    sys.publish("APP_SOCKET_SEND_DATA")
end
--这是发布QoS0消息后的回调函数，用于处理发布结果
local function pubQos0TestCb(result)
    log.info("mqttOutMsg.pubQos0TestCb",result)
    if result then sys.timerStart(pubQos0Test,10000) end
end
--发布一个QoS0的MQTT消息
function pubQos0Test()
    insertMsg("/qos0topic","Hello mqtt",0,{cb=pubQos0TestCb})
end
--这是发布QoS1消息后的回调函数，用于处理发布结果
local function pubQos1TestCb(result)
    log.info("mqttOutMsg.pubQos1TestCb",result)
    if result then sys.timerStart(pubQos1Test,20000) end
end
--发布一个中文QoS0的MQTT消息
function pubQos1Test()
    insertMsg("/中文qos1topic","中文qos1data",1,{cb=pubQos1TestCb})
end

--- 初始化“MQTT客户端数据发送”
-- @return 无
-- @usage mqttOutMsg.init()
function init()
    pubQos0Test()
    pubQos1Test()
end

--- 去初始化“MQTT客户端数据发送”
-- @return 无
-- @usage mqttOutMsg.unInit()
function unInit()
    sys.timerStop(pubQos0Test)
    sys.timerStop(pubQos1Test)
    while #msgQueue>0 do
        local outMsg = table.remove(msgQueue,1)
        if outMsg.user and outMsg.user.cb then outMsg.user.cb(false,outMsg.user.para) end
    end
end


--- MQTT客户端数据发送处理
-- @param mqttClient，MQTT客户端对象
-- @return 处理成功返回true，处理出错返回false
-- @usage mqttOutMsg.proc(mqttClient)
function proc(mqttClient)
    while #msgQueue>0 do
        local outMsg = table.remove(msgQueue,1)
        local result = mqttClient:publish(outMsg.t,outMsg.p,outMsg.q)
        if outMsg.user and outMsg.user.cb then outMsg.user.cb(result,outMsg.user.para) end
        if not result then return end
    end
    return true
end

module(...,package.seeall)

--- MQTT客户端数据接收处理
-- @param mqttClient，MQTT客户端对象
-- @return 处理成功返回true，处理出错返回false
-- @usage mqttInMsg.proc(mqttClient)
function proc(mqttClient)
    local result,data
    while true do
        result,data = mqttClient:receive(60000,"APP_SOCKET_SEND_DATA")
        --接收到数据
        if result then
            log.info("mqttInMsg.proc",data.topic,string.toHex(data.payload))

            --TODO：根据需求自行处理data.payload
        else
            break
        end
    end

    return result or data=="timeout" or data=="APP_SOCKET_SEND_DATA"
end

module(...,package.seeall)

require"misc"
require"mqtt"
require"mqttOutMsg"
require"mqttInMsg"

local ready = false

--- MQTT连接是否处于激活状态
-- @return 激活状态返回true，非激活状态返回false
-- @usage mqttTask.isReady()
function isReady()
    return ready
end

--启动MQTT客户端任务
sys.taskInit(
    function()
        local retryConnectCnt = 0
        while true do
            if not socket.isReady() then
                retryConnectCnt = 0
                --等待网络环境准备就绪，超时时间是5分钟
                sys.waitUntil("IP_READY_IND",300000)
            end

            if socket.isReady() then
                local imei = misc.getImei()
                --创建一个MQTT客户端
                local mqttClient = mqtt.client(imei,600,"user","password")
                --阻塞执行MQTT CONNECT动作，直至成功
                --如果使用ssl连接，打开mqttClient:connect("lbsmqtt.airm2m.com",1884,"tcp_ssl",{caCert="ca.crt"})，根据自己的需求配置
                --mqttClient:connect("lbsmqtt.airm2m.com",1884,"tcp_ssl",{caCert="ca.crt"})
                if mqttClient:connect("lbsmqtt.airm2m.com",1884,"tcp") then
                    retryConnectCnt = 0
                    ready = true
                    --订阅主题
                    if mqttClient:subscribe({["/event0"]=0, ["/中文event1"]=1}) then
                        mqttOutMsg.init()
                        --循环处理接收和发送的数据
                        while true do
                            if not mqttInMsg.proc(mqttClient) then log.error("mqttTask.mqttInMsg.proc error") break end
                            if not mqttOutMsg.proc(mqttClient) then log.error("mqttTask.mqttOutMsg proc error") break end
                        end
                        mqttOutMsg.unInit()
                    end
                    ready = false
                else
                    retryConnectCnt = retryConnectCnt+1
                end
                --断开MQTT连接
                mqttClient:disconnect()
                if retryConnectCnt>=5 then link.shut() retryConnectCnt=0 end
                sys.wait(5000)
            else
                --进入飞行模式，20秒之后，退出飞行模式
                net.switchFly(true)
                sys.wait(20000)
                net.switchFly(false)
            end
        end
    end
)