Tracking player's spell usage

[Layback_]

Hi all,

Yeah... it's me again

For this time, I am trying to make an addon that tracks player's spell usage and here is what I have got so far.

local SkillFlow = CreateFrame("Frame");
SkillFlow:RegisterEvent("PLAYER_REGEN_ENABLED");
SkillFlow:RegisterEvent("PLAYER_REGEN_DISABLED");
SkillFlow:RegisterEvent("COMBAT_LOG_EVENT_UNFILTERED");
 
SkillFlow.regenEnabled = true;
SkillFlow.queue = {};
SkillFlow.queueSize = 10;
 
function SkillFlow:PLAYER_REGEN_ENABLED()
    self.regenEnabled = true;
end
 
function SkillFlow:PLAYER_REGEN_DISABLED()
    self.regenEnabled = false;
end
 
function SkillFlow:OnEvent(event, ...)
    self[event](self, event, ...);
end
 
function SkillFlow:COMBAT_LOG_EVENT_UNFILTERED(event, ...)
    local _, subEvent, _, sourceGUID, _, _, _, _, _, _, _ = ...;
 
    if sourceGUID == UnitGUID("player") then
        if subEvent == "SPELL_CAST_SUCCESS" and not self.regenEnabled then
            local spellName = select(13, ...);
            
            if #self.queue < self.queueSize then
                table.insert(self.queue, spellName);
            else
                for i = 1, #self.queue - 1 do
                    self.queue[i] = self.queue[i + 1];
                end
 
                self.queue[self.queueSize] = spellName;
            end
 
            -- DUBUGGING ----------------------------------------
            print("\n======== Skill Flow ========");
            for i = 1, #self.queue do
                print(string.format("%d: %s", i, self.queue[i]));
            end
            print("============================");
            -----------------------------------------------------
        end
    end
end
 
SkillFlow:SetScript("OnEvent", SkillFlow.OnEvent);

There are basically two main problems that I am concerned:

1. The first spell fired before the combat won't be tracked and I know that is because of this line:

if type == "SPELL_CAST_SUCCESS" and not self.regenEnabled then

However, if I get rid of not self.regenEnabled, it even tracks for spell-casts done during non-combat situation.

2. Also tracks for spells fired via ExtraActionButton and so on. Since I am expecting to track player's spell only, I would like these kind of spells to be ignored.

In my personal opinion, COMBAT_LOG_EVENT (not COMBAT_LOG_EVENT_UNFILTERED) would do some job here, but I can't find further references regarding this.
(COMBAT_LOG_EVENT info page on wowwiki doesn't seem to cover this as well )

Any suggestions, please?

Thank you!