Runes Custom Timer

--The base code used was taken from Byrth's BRD.Lua - Custom Timers

function get_sets()
    timer_reg = {}
    runecounter = 0
end

function precast(spell)
    rune_custome_timer_pc(spell)
end

function midcast(spell)
end

function buff_change(status,gain)
    if gain then
        --add_to_chat(100,'> > > Gain > '..status)
    else
        if runes:contains(status) then -- Need to work on this...
            runecounter = runecounter -1
            if runecounter < 0 then
                runecounter = 0
            end
        end
        --add_to_chat(100,'> > Lost> '..status)
    end
end

function aftercast(spell,action)
    rune_custome_timer_af(spell)
end

function rune_custome_timer_pc(spell)
    runes = S{ 'Ignis', 'Gelus', 'Flabra', 'Tellus', 'Sulpor', 'Unda', 'Lux', 'Tenebrae' }
    if spell.type and spell.type == 'Rune' and not spell.interrupted then
        runecounter = runecounter + 1
        if runecounter > 3 then
            runecounter = 1
        end
    end
    runename = 'Rune: '..tostring(runecounter)

    if spell.name == "Swipe" and not spell.interrupted then
        send_command('timers delete "Rune: 1"')
        runecounter = 0
    end

    if spell.name == "Lunge" or spell.name == "Gambit" and not spell.interrupted then
        reset_timers()
    end
end

function rune_custome_timer_af(spell)
     if spell.type and spell.type == 'Rune' and spell.target and spell.target.type:upper() == 'SELF' and not spell.interrupted then
        local t = os.time()
        local tempreg = {}

        for i,v in pairs(timer_reg) do
            if v < t then tempreg[i] = true end
        end
        for i,v in pairs(tempreg) do
            timer_reg[i] = nil
        end

        local dur = 300
                add_to_chat(100,'> > > '..runename)

        if timer_reg[runename] then
                send_command('timers delete "'..runename..'"')
                timer_reg[runename] = t + dur
                send_command('timers create "'..runename..'" '..dur..' down')
        else
            local maxrunes = 3
            if maxrunes < table.length(timer_reg) then
                maxrunes = table.length(timer_reg)
            end

            if table.length(timer_reg) < maxrunes then
                timer_reg[runename] = t+dur
                send_command('timers create "'..runename..'" '..dur..' down')
            else
                local rep,reprune
                for i,v in pairs(timer_reg) do
                    if t+dur > v then
                        if not rep or rep > v then
                            rep = v
                            reprune = i
                        end
                    end
                end
                if reprune then
                    timer_reg[reprune] = nil
                    send_command('timers delete "'..reprune..'"')
                    timer_reg[runename] = t+dur
                    send_command('timers create "'..runename..'" '..dur..' down')
                end
            end
        end
    end
end

function reset_timers()
  send_command('timers delete "Rune: 1"')
  send_command('timers delete "Rune: 2"')
  send_command('timers delete "Rune: 3"')
  runecounter = 0
end


function self_command(cmd)
end