wirelessAPI

local isMaster = true -- true, ha szerver, false, ha kliens
local status = "offline"
local protocol = "workshop"
local timerID = 0

if os.getComputerLabel() == nil then
    os.setComputerLabel("networking"..os.getComputerID())
end

function send(ID, msg)
    rednet.send(ID, msg, protocol)
end

function downloadStatus(ID)
    send(ID, "sendstatus")
    local sID, msg, dist, prot = rednet.receive(protocol)
    return msg
end

function getName(ID)
    send(ID, "sendname", protocol)
    local sID, msg, dist, prot = rednet.receive(protocol)
    return msg
end

function sendName(ID)
    send(ID, os.getComputerLabel())
end


function getStatus(ID)
    if ID == nil or ID == os.getComputerID() then
        return status
    end

    return downloadStatus(ID)
end


function setStatus(ID, stat)
    if ID == nil or ID == os.getComputerID() then
        status = stat
    end

    if isMaster then
        send(ID, stat)
    end
end

function sendStatus(ID)
    send(ID, status)
end

function turnOn(ID)
    setStatus(ID, "0")
end

function turnOff(ID)
    setStatus(ID, "offline")
end

function open(side)
    if not rednet.isOpen(side) then
        rednet.open(side)
    end
end

function close(side)
    if rednet.isOpen(side) then
        rednet.close(side)
    end
end

function getClients()
    return rednet.lookup(protocol)
end

function joinProtocol(prot)
    protocol = prot
    rednet.host(protocol, os.getComputerLabel())
end

function leaveProtocol()
    rednet.unhost(protocol, os.getComputerLabel())
end

function init(master, side, prot, stat)
    isMaster = master
    status = stat
    open(side)
    joinProtocol(prot)
end

function listen(timeout)
    if timeout ~= nil then
        timerID = os.startTimer(timeout)
    end
    local event, p2, p3, p4, p5 = os.pullEvent()
    if ((event == "timer") and (p2 == timerID)) then
        timerID = 0
        return nil
    end
    if p3 == "sendstatus" then
        sendStatus(ID)
        print("Status sent") -- debug
    end
    if p3 == "sendname" then
        sendName(ID)
        print("Name sent") -- debug
        return nil
    end
    return event, p2, p3, p4, p5
end