stats weakaura lua script

function ()
    local now             = GetTime();
    WA_STATS_LAST_UP = WA_STATS_LAST_UP or now - 1;
    if now >= WA_STATS_LAST_UP + 0.1 then
        WA_STATS_LAST_UP = now;

        local agi              = select(1, UnitStat("player", 2));
        local mas              = GetMasteryEffect();
        local has              = UnitSpellHaste("player");
        local crit              = GetSpellCritChance(6);


        WA_STATS_RETURN = string.format([[
Agi: %.0f
Mastery: %.1f
Haste: %.1f
Crit: %.1f]],
            agi or 0,
            mas or 0,
            has or 0,
            crit or 0

        );
    end

    return  WA_STATS_RETURN or "<no data>";
end