-------------------
-- Initilization --
-------------------
    local addonName, addonTable = ...

-----------------------
-- Local Definitions --
-----------------------
    -- Addon Frame
    local frame = CreateFrame("Frame", addonName.."Frame", UIParent)

    -- Table to hold all damage events
    local damageTable = {}

    -- OnUpdate interval
    local updateInterval = 0.1

    -- GUID Types
    local knownTypes = {
        [0] = "player",
        [1] = "world object",
        [3] = "NPC",
        [4] = "pet",
        [5] = "vehicle"
    }

----------
-- Core --
----------
    frame:SetSize(500, 500)
    frame:SetPoint("CENTER", UIParent, "CENTER", 0, 0)

    frame.text = frame:CreateFontString(nil)
    frame.text:SetFont(STANDARD_TEXT_FONT, 25, "OUTLINE")
    frame.text:SetPoint("CENTER", frame, "CENTER", 0 ,0)

    local function damage(self, event, ...)
        local timeStamp, eventType, hideCaster, sourceGUID, sourceName, sourceFlags, sourceRaidFlags, destGUID, destName, destFlags, destRaidFlags = ...
        local maskedTypeBit = tonumber(sourceGUID:sub(5, 5), 16) % 8
        if destGUID == UnitGUID("player") and knownTypes[maskedTypeBit] == "NPC" then
            if eventType == "SWING_DAMAGE" then
                local amount = select(12, ...)
                damageTable[timeStamp] = amount
            end -- if event
        end -- if destGUID
    end -- function

    local totalTime = 0
    local totalDamage = 0
    local function onUpdate(self, elapsed)
        totalTime = totalTime + elapsed
        if totalTime >= updateInterval then
            for k, v in pairs(damageTable) do
                if k >= time() - 5 then
                    totalDamage = totalDamage + v
                end
            end

            if totalDamage > 0 then
                frame.text:SetText(totalDamage)
            else
                frame.text:SetText("")
            end

            totalDamage = 0
            totalTime = 0
        end -- if totalTime
    end -- function

------------
-- Events --
------------
    frame:RegisterEvent("COMBAT_LOG_EVENT_UNFILTERED")
    frame:SetScript("OnEvent", damage)
    frame:SetScript("OnUpdate", onUpdate)