Insanity gain

function()
    local insanityGain = 0;
    local currentInsanity = UnitPower("player", SPELL_POWER_INSANITY, forceUpdate);
    local deathAndMadness = nil;
    local maxInsanity = UnitPowerMax("player", SPELL_POWER_INSANITY);
    local currentSpell = UnitCastingInfo('player');
    local specGroup = GetActiveSpecGroup();
    local isFotMSelected = select(4, GetTalentInfo(1, 1, specGroup));
    local S2MName = select(2, GetTalentInfo(7, 3, specGroup));
    local DaMName = select(2, GetTalentInfo(1, 2, specGroup));
    local isS2MActive = select(11, WA_GetUnitBuff("player", S2MName));
    local isDaMActive = select(11, WA_GetUnitBuff("player", DaMName));

    if currentSpell == nil then
        currentSpell = UnitChannelInfo('player');
    end

    if currentSpell == nil then
        for i=1,40 do
            local name, icon, _, _, _, etime = UnitBuff("player",i)
            if name == "Death and Madness" then
                currentSpell = "Death and Madness";
            end
        end
    end

    if currentSpell == nil then
        insanityGain = 0;
        return 0,0,0,0;
    end

    local MB = GetSpellInfo(8092); -- Mind Blast
    local VT = GetSpellInfo(34914); -- Vampiric Touch
    local VOT = GetSpellInfo(263165); -- Void Torrent
    local MF = GetSpellInfo(15407); -- Mind Flay

    if currentSpell == MB then --Mind Blast
        if isFotMSelected then
            insanityGain = (8) * 1.2;
        else
            insanityGain = 8;
        end
    elseif currentSpell == VOT then --Void Torrent
        insanityGain = 15;
    elseif currentSpell == MF then --Mind Flay
        if isFotMSelected then
            insanityGain = (3) * 1.2;
        else
            insanityGain = 3;
        end
    elseif currentSpell == VT then --Vampric Touch
        insanityGain = 5;
    elseif currentSpell == "Death and Madness" then
        if isDaMActive then
            insanityGain = 10;
        else
            insanityGain = 0;
        end
    else
        insanityGain = 0;
        return 0,0,0,0;
    end

    if isS2MActive then
        insanityGain = insanityGain * 2.0;
    end

    local x = (currentInsanity+insanityGain);
    local y = math.modf(x);
    return y,maxInsanity,0,0;

end