local ADDON_NAME, OneWoW = ...

local function IsEnabled()
    local ov = OneWoW.db and OneWoW.db.global and OneWoW.db.global.settings and OneWoW.db.global.settings.overlays
    if not ov or not ov.integrations or not ov.integrations.onewow_bags then return true end
    return ov.integrations.onewow_bags.enabled ~= false
end

local function ProcessButton(button, bagID, slotID)
    if not IsEnabled() then
        OneWoW.OverlayEngine:CleanButton(button)
        return
    end
    if not button.owb_hasItem or not bagID or not slotID then
        OneWoW.OverlayEngine:CleanButton(button)
        return
    end
    local loc    = ItemLocation:CreateFromBagAndSlot(bagID, slotID)
    local exists = C_Item.DoesItemExist(loc)
    if exists then
        local link = C_Item.GetItemLink(loc)
        if link then
            OneWoW.OverlayEngine:ProcessButton(button, link, loc)
        else
            OneWoW.OverlayEngine:CleanButton(button)
        end
    else
        OneWoW.OverlayEngine:CleanButton(button)
    end
end

local function SetupCallbacks()
    local Bags = _G.OneWoW_Bags
    if not Bags or not Bags.RegisterItemButtonCallback then return end

    Bags:RegisterItemButtonCallback("OneWoW_Overlays", function(button, bagID, slotID)
        ProcessButton(button, bagID, slotID)
    end)

    local function RefreshOneWoWBags()
        Bags:FireCallbacksOnAllButtons()
    end

    OneWoW.OverlayEngine:RegisterIntegration(RefreshOneWoWBags)
end

local initFrame = CreateFrame("Frame")
initFrame:RegisterEvent("PLAYER_LOGIN")
initFrame:SetScript("OnEvent", function()
    if C_AddOns.IsAddOnLoaded("OneWoW_Bags") then
        SetupCallbacks()
    end
    initFrame:UnregisterEvent("PLAYER_LOGIN")
end)
