local E, L, V, P, G = unpack(ElvUI)
local BL = E:GetModule('Blizzard')
local B = E:GetModule('Bags')
local LSM = E.Libs.LSM

local _G = _G
local hooksecurefunc = hooksecurefunc
local GetCurrentGuildBankTab = GetCurrentGuildBankTab
local GetGuildBankItemLink = GetGuildBankItemLink

local GetItemInfo = C_Item.GetItemInfo
local GetDetailedItemLevelInfo = C_Item.GetDetailedItemLevelInfo

local NUM_SLOTS_PER_GUILDBANK_GROUP = 14
local NUM_GUILDBANK_COLUMNS = 7

function BL:GuildBank_ItemLevel(button)
	local db = E.db.general.guildBank
	if not db then return end

	if not button.itemLevel then
		button.itemLevel = button:CreateFontString(nil, 'OVERLAY')
	end

	button.itemLevel:ClearAllPoints()
	button.itemLevel:Point(db.itemLevelPosition, db.itemLevelxOffset, db.itemLevelyOffset)
	button.itemLevel:FontTemplate(LSM:Fetch('font', db.itemLevelFont), db.itemLevelFontSize, db.itemLevelFontOutline)

	local ilvl, r, g, b
	local tab = db.itemLevel and GetCurrentGuildBankTab()
	local itemlink = tab and GetGuildBankItemLink(tab, button:GetID())
	if itemlink then
		local _, _, rarity, _, _, _, _, _, itemEquipLoc, _, _, classID, subclassID = GetItemInfo(itemlink)
		if not E.Retail then
			if rarity then
				r, g, b = E:GetItemQualityColor(rarity)
			end

			if rarity and db.itemQuality then
				button.IconBorder:SetVertexColor(r, g, b)
				button.IconBorder:Show()
			else
				button.IconBorder:Hide()
			end
		end

		local canShowItemLevel = B:IsItemEligibleForItemLevelDisplay(classID, subclassID, itemEquipLoc, rarity)
		if canShowItemLevel then
			local custom = db.itemLevelCustomColorEnable and db.itemLevelCustomColor
			if custom then
				r, g, b = custom.r, custom.g, custom.b
			elseif E.Retail and rarity then -- we already do this above otherwise
				r, g, b = E:GetItemQualityColor(rarity)
			end

			ilvl = GetDetailedItemLevelInfo(itemlink)
		end
	elseif not E.Retail then
		button.IconBorder:Hide()
	end

	button.itemLevel:SetText(ilvl and ilvl >= db.itemLevelThreshold and ilvl or '')
	button.itemLevel:SetTextColor(r or 1, g or 1, b or 1)
end

function BL:GuildBank_CountText(button)
	local db = E.db.general.guildBank
	if not db then return end

	button.Count:ClearAllPoints()
	button.Count:Point(db.countPosition, db.countxOffset, db.countyOffset)
	button.Count:FontTemplate(LSM:Fetch('font', db.countFont), db.countFontSize, db.countFontOutline)
	button.Count:SetTextColor(db.countFontColor.r, db.countFontColor.g, db.countFontColor.b)
end

function BL:GuildBank_Update()
	local frame = _G.GuildBankFrame
	if not frame or not frame:IsShown() then return end

	for i = 1, NUM_GUILDBANK_COLUMNS do
		local column = frame['Column'..i]

		for x = 1, NUM_SLOTS_PER_GUILDBANK_GROUP do
			local button = column['Button'..x]

			BL:GuildBank_ItemLevel(button)
			BL:GuildBank_CountText(button)
		end
	end
end

function BL:ImproveGuildBank()
	hooksecurefunc(_G.GuildBankFrame, 'Update', BL.GuildBank_Update)

	-- blizzard bug fix when trying to search after having the guild bank open
	if not E.Retail then -- they copy pasted too much
		for i = 1, _G.MAX_GUILDBANK_TABS do
			local tab = _G['GuildBankTab'..i]
			local button = tab and tab.Button
			if button then
				button:UnregisterEvent('INVENTORY_SEARCH_UPDATE')
			end
		end
	end
end
