-- Initialization of variables
api = freeswitch.API()
-- First argument is caller uuid.
caller_uuid = argv[1]
if caller_uuid==nil then return end
-- Second argument is callcenter name.
queue_name = argv[2]
if queue_name==nil then return end
-- Third argument is repeating interval in miliseconds.
mseconds = argv[3]
if mseconds==nil then return end

times_announced = 0


while (true) do
    freeswitch.msleep(mseconds) -- Pause before announcing position
    members = api:executeString("callcenter_config queue list members "..queue_name)
    pos=1 -- Variable to count position
    exists=false -- Variable to allow script termination when member leaves queue
    for line in members:gmatch("[^\r\n]+") do
        if (string.find(line,"Trying")~=nil or string.find(line,"Waiting")~=nil) then
            -- Members have a position when their state is Waiting or Trying
            if string.find(line,caller_uuid,1,true)~=nil then
                exists=true -- Member still in queue so script must continue
                --api:executeString("uuid_broadcast "..caller_uuid.." ivr/ivr-you_are_number.wav aleg")
                --api:executeString("uuid_broadcast "..caller_uuid.." digits/"..pos..".wav aleg")
                if pos == 1 then
                    if times_accounced == 0 then
                        api:executeString("uuid_broadcast "..caller_uuid.." say:'Please hold. You will be connected to a representative shortly.' aleg")
                    else
                        api:executeString("uuid_broadcast "..caller_uuid.." say:'We are sorry to keep you waiting. You will be connected to a representative shortly.' aleg")
                    end
                elseif pos == 2 then
                    if times_accounced == 0 then
                        api:executeString("uuid_broadcast "..caller_uuid.." say:'There is 1 caller ahead of you. We will be with you shortly.' aleg")
                    else
                        api:executeString("uuid_broadcast "..caller_uuid.." say:'We are sorry to keep you waiting. There is 1 caller ahead of you. We will be with you shortly.' aleg")
                    end
                else
                    if times_accounced == 0 then
                        api:executeString("uuid_broadcast "..caller_uuid.." say:'There are "..(pos-1).." callers ahead of you. We will be with you shortly.' aleg")
                    else
                        api:executeString("uuid_broadcast "..caller_uuid.." say:'We are sorry to keep you waiting. There are "..(pos-1).." callers ahead of you. We will be with you shortly.' aleg")
                    end
                end
                times_announced = times_announced + 1
            end
            pos=pos+1
        end
    end
    if exists==false then return end -- If member was not found in queue, or it's status is Aborted - terminate script
end