local _, F = ...

-- 1. Event Handling (Replaces Trigger 2)
F.Events:RegisterEvent("PLAYER_ENTERING_WORLD")
F.Events:RegisterEvent("PLAYER_LEVEL_UP")
F.Events:RegisterEvent("PLAYER_XP_UPDATE")
F.Events:RegisterEvent("UPDATE_FACTION")
F.Events:RegisterEvent("QUEST_LOG_UPDATE")
F.Events:RegisterEvent("QUEST_WATCH_LIST_CHANGED")
F.Events:RegisterEvent("QUEST_WATCH_UPDATE")
F.Events:RegisterEvent("ADDON_LOADED")

F.Events:SetScript("OnEvent", function(self, event, ...)
    local arg1 = ...

    if event == "ADDON_LOADED" and arg1 == "NixxnuxXPBar" then
        F.InitDB()
        F.State.session.startTime = time()
        F.State.session.lastXP = UnitXP("player")
        -- Hide Blizzard XP / Reputation bars if configured
        if F.UI and F.UI.HideBlizzardBars then
            F.UI.HideBlizzardBars()
        end
    end

    if event == "PLAYER_ENTERING_WORLD" then
        F.State:UpdatePlayerXP()
        F.State:UpdateQuestXP()
        -- Hide Blizzard bars after entering world (in case something re-enabled them)
        if F.UI and F.UI.HideBlizzardBars then
            F.UI.HideBlizzardBars()
        end

    elseif event == "PLAYER_XP_UPDATE" then
        local currentXP = UnitXP("player")
        local gained = currentXP - F.State.session.lastXP

        -- Handle wrap around level up
        if gained < 0 then
             gained = F.State.maxXP - F.State.session.lastXP + currentXP
        end

        F.State.session.gainedXP = F.State.session.gainedXP + gained
        F.State.session.lastXP = currentXP
        F.State:UpdatePlayerXP()

    elseif event == "QUEST_LOG_UPDATE" or event == "QUEST_WATCH_LIST_CHANGED" or event == "QUEST_WATCH_UPDATE" then
        F.State:UpdateQuestXP()
    end

    -- Force a UI Update immediately on event
    F.UpdateUI()
end)

-- ticker that updates the UI each second
C_Timer.NewTicker(1, function()
    F.UpdateUI()
end)

function F.UpdateUI()
    if F.UI and F.UI.Update then
        F.UI.Update()
    end
end