MERCHANT_ITEMS_PER_PAGE = 10;
BUYBACK_ITEMS_PER_PAGE = 12;
MAX_ITEM_COST = 3;
MAX_MERCHANT_CURRENCIES = 6;
local MAX_MONEY_DISPLAY_WIDTH = 120;

function MerchantFrame_OnLoad(self)
	self:RegisterEvent("MERCHANT_UPDATE");
	self:RegisterEvent("GUILDBANK_UPDATE_MONEY");
	self:RegisterEvent("HEIRLOOMS_UPDATED");
	self:RegisterEvent("BAG_UPDATE");
	self:RegisterEvent("MERCHANT_CONFIRM_TRADE_TIMER_REMOVAL");
	self:RegisterUnitEvent("UNIT_INVENTORY_CHANGED", "player");
	self:RegisterForDrag("LeftButton");
	self.page = 1;
	-- Tab Handling code
	PanelTemplates_SetNumTabs(self, 2);
	PanelTemplates_SetTab(self, 1);

	MoneyFrame_SetMaxDisplayWidth(MerchantMoneyFrame, 160);

	self.FilterDropdown:SetWidth(152);
	self.FilterDropdown:SetSelectionTranslator(function(selection)
		-- "All Specializations" is replaced with the player's class.
		if selection.data == LE_LOOT_FILTER_CLASS then
			return UnitClass("player");
		end

		return selection.text;
	end);

	local function SetSelected(filter)
		SetMerchantFilter(filter);

		MerchantFrame.page = 1;
		MerchantFrame_Update();
	end
	
	local function IsSelected(filter)
		return GetMerchantFilter() == filter;
	end
	
	self.FilterDropdown:SetupMenu(function(dropdown, rootDescription)
		rootDescription:SetTag("MENU_MERCHANT_FRAME");

		local className = UnitClass("player");
		local sex = UnitSex("player");
		
		for index = 1, GetNumSpecializations() do
			local isInspect = false;
			local isPet = false;
			local inspectTarget = nil;
			local name = select(2, C_SpecializationInfo.GetSpecializationInfo(index, isInspect, isPet, inspectTarget, sex));

			local filter = (LE_LOOT_FILTER_SPEC1 + index) - 1;
			rootDescription:CreateRadio(name, IsSelected, SetSelected, filter);
		end

		rootDescription:CreateRadio(ALL_SPECS, IsSelected, SetSelected, LE_LOOT_FILTER_CLASS);
		rootDescription:CreateDivider();
		rootDescription:CreateRadio(ITEM_BIND_ON_EQUIP, IsSelected, SetSelected, LE_LOOT_FILTER_BOE);
		rootDescription:CreateRadio(ALL, IsSelected, SetSelected, LE_LOOT_FILTER_ALL);
	end);
end

function MerchantFrame_MerchantShow()
	ShowUIPanel(MerchantFrame);
	if ( not MerchantFrame:IsShown() ) then
		CloseMerchant();
		return;
	end
	MerchantFrame.page = 1;
	MerchantFrame_UpdateCurrencies();
	MerchantFrame_Update();
end

function MerchantFrame_MerchantClosed()
	MerchantFrame:UnregisterEvent("CURRENCY_DISPLAY_UPDATE");
	StaticPopup_Hide("CONFIRM_MERCHANT_TRADE_TIMER_REMOVAL");
	HideUIPanel(MerchantFrame);
end

function MerchantFrame_OnEvent(self, event, ...)
	if ( event == "MERCHANT_UPDATE" and "MERCHANT_FILTER_ITEM_UPDATE" ) then
		self.update = true;
	elseif ( event == "PLAYER_MONEY" or event == "GUILDBANK_UPDATE_MONEY" or event == "GUILDBANK_UPDATE_WITHDRAWMONEY" ) then
		MerchantFrame_UpdateCanRepairAll();
		MerchantFrame_UpdateRepairButtons();
	elseif ( event == "CURRENCY_DISPLAY_UPDATE" or event == "BAG_UPDATE") then
		MerchantFrame_UpdateCurrencyAmounts();
		MerchantFrame_Update();
	elseif ( event == "HEIRLOOMS_UPDATED" ) then
		local itemID, updateReason = ...;
		if itemID and updateReason == "NEW" then
			MerchantFrame_Update();
		end
	elseif ( event == "MERCHANT_CONFIRM_TRADE_TIMER_REMOVAL" ) then
		local item = ...;
		StaticPopup_Show("CONFIRM_MERCHANT_TRADE_TIMER_REMOVAL", item);
	elseif ( event == "GET_ITEM_INFO_RECEIVED" ) then
		MerchantFrame_UpdateItemQualityBorders(self);
	elseif ( event == "UNIT_INVENTORY_CHANGED" ) then
		MerchantFrame_Update();
	end
end

function MerchantFrame_OnUpdate(self, dt)
	if ( self.update == true ) then
		self.update = false;
		if ( self:IsVisible() ) then
			MerchantFrame_Update();
		end
	end
	if ( MerchantFrame.itemHover ) then
		if ( IsModifiedClick("DRESSUP") ) then
			ShowInspectCursor();
		else
			if (CanAffordMerchantItem(MerchantFrame.itemHover) == false) then
				SetCursor("BUY_ERROR_CURSOR");
			else
				SetCursor("BUY_CURSOR");
			end
		end
	end
	if ( MerchantRepairItemButton:IsShown() ) then
		if ( InRepairMode() ) then
			MerchantRepairItemButton:LockHighlight();
		else
			MerchantRepairItemButton:UnlockHighlight();
		end
	end
end

function MerchantFrame_OnShow(self)
	local forceUpdate = true;
	OpenAllBags(self, forceUpdate);

	-- Update repair all button status
	MerchantFrame_UpdateCanRepairAll();
	MerchantFrame_UpdateGuildBankRepair();
	PanelTemplates_SetTab(MerchantFrame, 1);

	ResetSetMerchantFilter();
	self.FilterDropdown:Update();

	MerchantFrame_Update();
	PlaySound(SOUNDKIT.IG_CHARACTER_INFO_OPEN);
end

function MerchantFrame_OnHide(self)
	CloseMerchant();

	local forceUpdate = true;
	CloseAllBags(self, forceUpdate);

	ResetCursor();

	StaticPopup_Hide("CONFIRM_PURCHASE_TOKEN_ITEM");
	StaticPopup_Hide("CONFIRM_PURCHASE_ITEM_DELAYED");
	StaticPopup_Hide("CONFIRM_REFUND_TOKEN_ITEM");
	StaticPopup_Hide("CONFIRM_REFUND_MAX_HONOR");
	StaticPopup_Hide("CONFIRM_REFUND_MAX_ARENA_POINTS");
	PlaySound(SOUNDKIT.IG_CHARACTER_INFO_CLOSE);
end

function MerchantFrame_OnMouseWheel(self, value)
	if ( value > 0 ) then
		if ( MerchantPrevPageButton:IsShown() and MerchantPrevPageButton:IsEnabled() ) then
			MerchantPrevPageButton_OnClick();
		end
	else
		if ( MerchantNextPageButton:IsShown() and MerchantNextPageButton:IsEnabled() ) then
			MerchantNextPageButton_OnClick();
		end
	end
end

function MerchantFrame_Update()
	if ( MerchantFrame.lastTab ~= MerchantFrame.selectedTab ) then
		MerchantFrame_CloseStackSplitFrame();
		MerchantFrame.lastTab = MerchantFrame.selectedTab;
	end

	local filterDropdownDisabled = C_GameRules.IsGameRuleActive(Enum.GameRule.MerchantFilterDisabled);
	MerchantFrame.FilterDropdown:SetShown(not filterDropdownDisabled);
	if ( not filterDropdownDisabled ) then
		MerchantFrame.FilterDropdown:Update();
	end

	if ( MerchantFrame.selectedTab == 1 ) then
		MerchantFrame_UpdateMerchantInfo();
	else
		MerchantFrame_UpdateBuybackInfo();
	end

	local hasJunkItems = C_MerchantFrame.GetNumJunkItems() > 0;
	MerchantSellAllJunkButton.Icon:SetDesaturated(not hasJunkItems);
	MerchantSellAllJunkButton:SetEnabled(hasJunkItems);
end

function MerchantFrameItem_UpdateQuality(self, link, isBound)
	local quality = link and select(3, C_Item.GetItemInfo(link)) or nil;
	if quality then
		local colorData = ColorManager.GetColorDataForItemQuality(quality);
		if colorData then
			self.Name:SetTextColor(colorData.r, colorData.g, colorData.b);
		else
			self.Name:SetTextColor(NORMAL_FONT_COLOR.r, NORMAL_FONT_COLOR.g, NORMAL_FONT_COLOR.b);
		end
	else
		self.Name:SetTextColor(NORMAL_FONT_COLOR.r, NORMAL_FONT_COLOR.g, NORMAL_FONT_COLOR.b);
		MerchantFrame_RegisterForQualityUpdates();
	end

	local doNotSuppressOverlays = false;
	self.ItemButton:SetItemButtonQuality(quality, link, doNotSuppressOverlays, isBound);
end

function MerchantFrame_RegisterForQualityUpdates()
	if ( not MerchantFrame:IsEventRegistered("GET_ITEM_INFO_RECEIVED") ) then
		MerchantFrame:RegisterEvent("GET_ITEM_INFO_RECEIVED");
	end
end

function MerchantFrame_UnregisterForQualityUpdates()
	if ( MerchantFrame:IsEventRegistered("GET_ITEM_INFO_RECEIVED") ) then
		MerchantFrame:UnregisterEvent("GET_ITEM_INFO_RECEIVED");
	end
end

function MerchantFrame_UpdateItemQualityBorders(self)
	MerchantFrame_UnregisterForQualityUpdates(); -- We'll re-register if we need to.

	if ( MerchantFrame.selectedTab == 1 ) then
		local numMerchantItems = GetMerchantNumItems();
		for i=1, MERCHANT_ITEMS_PER_PAGE do
			local index = (((MerchantFrame.page - 1) * MERCHANT_ITEMS_PER_PAGE) + i);
			local item = _G["MerchantItem"..i];
			if ( index <= numMerchantItems ) then
				local itemLink = GetMerchantItemLink(index);
				MerchantFrameItem_UpdateQuality(item, itemLink);
			end
		end
	else
		local numBuybackItems = GetNumBuybackItems();
		for index=1, BUYBACK_ITEMS_PER_PAGE do
			local item = _G["MerchantItem"..index];
			if ( index <= numBuybackItems ) then
				local itemLink = GetBuybackItemLink(index);
				MerchantFrameItem_UpdateQuality(item, itemLink);
			end
		end
	end
end

function MerchantFrame_UpdateMerchantInfo()
	MerchantFrame:SetTitle(UnitName("npc"));
	MerchantFrame:SetPortraitToUnit("npc");

	local numMerchantItems = GetMerchantNumItems();

	MerchantPageText:SetFormattedText(MERCHANT_PAGE_NUMBER, MerchantFrame.page, math.ceil(numMerchantItems / MERCHANT_ITEMS_PER_PAGE));

	for i=1, MERCHANT_ITEMS_PER_PAGE do
		local index = (((MerchantFrame.page - 1) * MERCHANT_ITEMS_PER_PAGE) + i);
		local itemButton = _G["MerchantItem"..i.."ItemButton"];
		local merchantButton = _G["MerchantItem"..i];
		local merchantMoney = _G["MerchantItem"..i.."MoneyFrame"];
		local merchantAltCurrency = _G["MerchantItem"..i.."AltCurrencyFrame"];
		local info;
		if index <= numMerchantItems then
			info = C_MerchantFrame.GetItemInfo(index);
		end
		if info then
			if info.currencyID then
				info.name, info.texture, info.numAvailable = CurrencyContainerUtil.GetCurrencyContainerInfo(info.currencyID, info.numAvailable, info.name, info.texture, nil);
			end

			local canAfford = CanAffordMerchantItem(index);
			_G["MerchantItem"..i.."Name"]:SetText(info.name);
			SetItemButtonCount(itemButton, info.stackCount);
			SetItemButtonStock(itemButton, info.numAvailable);
			SetItemButtonTexture(itemButton, info.texture);

			if ( info.hasExtendedCost and (info.price <= 0) ) then
				itemButton.price = nil;
				itemButton.extendedCost = true;
				itemButton.name = info.name;
				itemButton.link = GetMerchantItemLink(index);
				itemButton.texture = info.texture;
				MerchantFrame_UpdateAltCurrency(index, i, canAfford);
				merchantAltCurrency:ClearAllPoints();
				merchantAltCurrency:SetPoint("BOTTOMLEFT", "MerchantItem"..i.."NameFrame", "BOTTOMLEFT", 0, 31);
				merchantMoney:Hide();
				merchantAltCurrency:Show();
			elseif ( info.hasExtendedCost and (info.price > 0) ) then
				itemButton.price = info.price;
				itemButton.extendedCost = true;
				itemButton.name = info.name;
				itemButton.link = GetMerchantItemLink(index);
				itemButton.texture = info.texture;
				local altCurrencyWidth = MerchantFrame_UpdateAltCurrency(index, i, canAfford);
				MoneyFrame_SetMaxDisplayWidth(merchantMoney, MAX_MONEY_DISPLAY_WIDTH - altCurrencyWidth);
				MoneyFrame_Update(merchantMoney:GetName(), info.price);
				local color;
				if (canAfford == false) then
					color = "gray";
				end
				SetMoneyFrameColor(merchantMoney:GetName(), color);
				merchantAltCurrency:ClearAllPoints();
				merchantAltCurrency:SetPoint("LEFT", merchantMoney:GetName(), "RIGHT", -14, 0);
				merchantAltCurrency:Show();
				merchantMoney:Show();
			else
				itemButton.price = info.price;
				itemButton.extendedCost = nil;
				itemButton.name = info.name;
				itemButton.link = GetMerchantItemLink(index);
				itemButton.texture = info.texture;
				MoneyFrame_SetMaxDisplayWidth(merchantMoney, MAX_MONEY_DISPLAY_WIDTH);
				MoneyFrame_Update(merchantMoney:GetName(), info.price);
				local color;
				if (canAfford == false) then
					color = "gray";
				end
				SetMoneyFrameColor(merchantMoney:GetName(), color);
				merchantAltCurrency:Hide();
				merchantMoney:Show();
			end

			if info.isQuestStartItem then
				itemButton.IconQuestTexture:SetTexture(TEXTURE_ITEM_QUEST_BANG);
				itemButton.IconQuestTexture:Show();
			else
				itemButton.IconQuestTexture:Hide();
			end

			local itemLink = GetMerchantItemLink(index);
			MerchantFrameItem_UpdateQuality(merchantButton, itemLink);

			local merchantItemID = GetMerchantItemID(index);
			local isHeirloom = merchantItemID and C_Heirloom.IsItemHeirloom(merchantItemID);
			local isKnownHeirloom = isHeirloom and C_Heirloom.PlayerHasHeirloom(merchantItemID);

			itemButton.showNonrefundablePrompt = not C_MerchantFrame.IsMerchantItemRefundable(index);

			itemButton.hasItem = true;
			itemButton:SetID(index);
			itemButton:Show();

			local tintRed = not info.isPurchasable or (not info.isUsable and not isHeirloom);

			SetItemButtonDesaturated(itemButton, isKnownHeirloom);

			if ( info.numAvailable == 0 or isKnownHeirloom ) then
				-- If not available and not usable
				if ( tintRed ) then
					SetItemButtonNameFrameVertexColor(merchantButton, 0.5, 0, 0);
					SetItemButtonSlotVertexColor(merchantButton, 0.5, 0, 0);
					SetItemButtonTextureVertexColor(itemButton, 0.5, 0, 0);
					SetItemButtonNormalTextureVertexColor(itemButton, 0.5, 0, 0);
				else
					SetItemButtonNameFrameVertexColor(merchantButton, 0.5, 0.5, 0.5);
					SetItemButtonSlotVertexColor(merchantButton, 0.5, 0.5, 0.5);
					SetItemButtonTextureVertexColor(itemButton, 0.5, 0.5, 0.5);
					SetItemButtonNormalTextureVertexColor(itemButton,0.5, 0.5, 0.5);
				end

			elseif ( tintRed ) then
				SetItemButtonNameFrameVertexColor(merchantButton, 1.0, 0, 0);
				SetItemButtonSlotVertexColor(merchantButton, 1.0, 0, 0);
				SetItemButtonTextureVertexColor(itemButton, 0.9, 0, 0);
				SetItemButtonNormalTextureVertexColor(itemButton, 0.9, 0, 0);
			else
				SetItemButtonNameFrameVertexColor(merchantButton, 0.5, 0.5, 0.5);
				SetItemButtonSlotVertexColor(merchantButton, 1.0, 1.0, 1.0);
				SetItemButtonTextureVertexColor(itemButton, 1.0, 1.0, 1.0);
				SetItemButtonNormalTextureVertexColor(itemButton, 1.0, 1.0, 1.0);
			end
		else
			itemButton.price = nil;
			itemButton.hasItem = nil;
			itemButton.name = nil;
			itemButton:Hide();
			SetItemButtonNameFrameVertexColor(merchantButton, 0.5, 0.5, 0.5);
			SetItemButtonSlotVertexColor(merchantButton,0.4, 0.4, 0.4);
			_G["MerchantItem"..i.."Name"]:SetText("");
			_G["MerchantItem"..i.."MoneyFrame"]:Hide();
			_G["MerchantItem"..i.."AltCurrencyFrame"]:Hide();

		end
	end

	-- Handle repair items
	MerchantFrame_UpdateRepairButtons();

	-- Handle vendor buy back item
	local numBuybackItems = GetNumBuybackItems();
	local buybackName, buybackTexture, buybackPrice, buybackQuantity, buybackNumAvailable, buybackIsUsable, buybackIsBound = GetBuybackItemInfo(numBuybackItems);
	if ( buybackName ) then
		MerchantBuyBackItemName:SetText(buybackName);
		SetItemButtonCount(MerchantBuyBackItemItemButton, buybackQuantity);
		SetItemButtonStock(MerchantBuyBackItemItemButton, buybackNumAvailable);
		SetItemButtonTexture(MerchantBuyBackItemItemButton, buybackTexture);
		MerchantFrameItem_UpdateQuality(MerchantBuyBackItem, GetBuybackItemLink(numBuybackItems), buybackIsBound);
		MoneyFrame_Update("MerchantBuyBackItemMoneyFrame", buybackPrice);
		MerchantBuyBackItem:Show();

	else
		MerchantBuyBackItemName:SetText("");
		SetItemButtonTexture(MerchantBuyBackItemItemButton, "");
		SetItemButtonCount(MerchantBuyBackItemItemButton, 0);
		MerchantFrameItem_UpdateQuality(MerchantBuyBackItem, nil);
		-- Hide the tooltip upon sale
		if ( GameTooltip:IsOwned(MerchantBuyBackItemItemButton) ) then
			GameTooltip:Hide();
		end
	end

	-- Handle paging buttons
	if ( numMerchantItems > MERCHANT_ITEMS_PER_PAGE ) then
		if ( MerchantFrame.page == 1 ) then
			MerchantPrevPageButton:Disable();
		else
			MerchantPrevPageButton:Enable();
		end
		if ( MerchantFrame.page == ceil(numMerchantItems / MERCHANT_ITEMS_PER_PAGE) or numMerchantItems == 0) then
			MerchantNextPageButton:Disable();
		else
			MerchantNextPageButton:Enable();
		end
		MerchantPageText:Show();
		MerchantPrevPageButton:Show();
		MerchantNextPageButton:Show();
	else
		MerchantPageText:Hide();
		MerchantPrevPageButton:Hide();
		MerchantNextPageButton:Hide();
	end

	-- Show all merchant related items
	MerchantBuyBackItem:Show();
	MerchantFrameBottomLeftBorder:Show();

	MerchantSellAllJunkButton:SetShown(C_MerchantFrame.IsSellAllJunkEnabled());

	-- Hide buyback related items
	MerchantItem11:Hide();
	MerchantItem12:Hide();
	BuybackBG:Hide();

	-- Position merchant items
	MerchantItem3:SetPoint("TOPLEFT", "MerchantItem1", "BOTTOMLEFT", 0, -8);
	MerchantItem5:SetPoint("TOPLEFT", "MerchantItem3", "BOTTOMLEFT", 0, -8);
	MerchantItem7:SetPoint("TOPLEFT", "MerchantItem5", "BOTTOMLEFT", 0, -8);
	MerchantItem9:SetPoint("TOPLEFT", "MerchantItem7", "BOTTOMLEFT", 0, -8);
end

function MerchantFrame_UpdateAltCurrency(index, indexOnPage, canAfford)
	local itemCount = GetMerchantItemCostInfo(index);
	local frameName = "MerchantItem"..indexOnPage.."AltCurrencyFrame";
	local usedCurrencies = 0;
	local width = 0;

	-- update Alt Currency Frame with itemValues
	if ( itemCount > 0 ) then
		for i=1, MAX_ITEM_COST do
			local itemTexture, itemValue, itemLink = GetMerchantItemCostItem(index, i);
			if ( itemTexture ) then
				usedCurrencies = usedCurrencies + 1;
				local button = _G[frameName.."Item"..usedCurrencies];
				button.index = index;
				button.item = i;
				button.itemLink = itemLink;
				AltCurrencyFrame_Update(frameName.."Item"..usedCurrencies, itemTexture, itemValue, canAfford);
				width = width + button:GetWidth();
				if ( usedCurrencies > 1 ) then
					-- button spacing;
					width = width + 4;
				end
				button:Show();
			end
		end
		for i = usedCurrencies + 1, MAX_ITEM_COST do
			_G[frameName.."Item"..i]:Hide();
		end
	else
		for i=1, MAX_ITEM_COST do
			_G[frameName.."Item"..i]:Hide();
		end
	end
	return width;
end

function MerchantFrame_UpdateBuybackInfo()
	MerchantFrame:SetTitle(MERCHANT_BUYBACK);
	MerchantFrame:SetPortraitToAsset("Interface\\MerchantFrame\\UI-BuyBack-Icon");

	-- Show Buyback specific items
	MerchantItem11:Show();
	MerchantItem12:Show();
	BuybackBG:Show();

	-- Position buyback items
	MerchantItem3:SetPoint("TOPLEFT", "MerchantItem1", "BOTTOMLEFT", 0, -15);
	MerchantItem5:SetPoint("TOPLEFT", "MerchantItem3", "BOTTOMLEFT", 0, -15);
	MerchantItem7:SetPoint("TOPLEFT", "MerchantItem5", "BOTTOMLEFT", 0, -15);
	MerchantItem9:SetPoint("TOPLEFT", "MerchantItem7", "BOTTOMLEFT", 0, -15);

	local numBuybackItems = GetNumBuybackItems();
	local itemButton, buybackButton;
	local buybackName, buybackTexture, buybackPrice, buybackQuantity, buybackNumAvailable, buybackIsUsable, buybackIsBound;
	local buybackItemLink;
	for i=1, BUYBACK_ITEMS_PER_PAGE do
		itemButton = _G["MerchantItem"..i.."ItemButton"];
		buybackButton = _G["MerchantItem"..i];
		_G["MerchantItem"..i.."AltCurrencyFrame"]:Hide();
		if ( i <= numBuybackItems ) then
			buybackName, buybackTexture, buybackPrice, buybackQuantity, buybackNumAvailable, buybackIsUsable, buybackIsBound = GetBuybackItemInfo(i);
			_G["MerchantItem"..i.."Name"]:SetText(buybackName);
			SetItemButtonCount(itemButton, buybackQuantity);
			SetItemButtonStock(itemButton, buybackNumAvailable);
			SetItemButtonTexture(itemButton, buybackTexture);
			_G["MerchantItem"..i.."MoneyFrame"]:Show();
			MoneyFrame_Update("MerchantItem"..i.."MoneyFrame", buybackPrice);
			buybackItemLink = GetBuybackItemLink(i);
			MerchantFrameItem_UpdateQuality(buybackButton, buybackItemLink, buybackIsBound);
			itemButton:SetID(i);
			itemButton:Show();
			if ( not buybackIsUsable ) then
				SetItemButtonNameFrameVertexColor(buybackButton, 1.0, 0, 0);
				SetItemButtonSlotVertexColor(buybackButton, 1.0, 0, 0);
				SetItemButtonTextureVertexColor(itemButton, 0.9, 0, 0);
				SetItemButtonNormalTextureVertexColor(itemButton, 0.9, 0, 0);
			else
				SetItemButtonNameFrameVertexColor(buybackButton, 0.5, 0.5, 0.5);
				SetItemButtonSlotVertexColor(buybackButton, 1.0, 1.0, 1.0);
				SetItemButtonTextureVertexColor(itemButton, 1.0, 1.0, 1.0);
				SetItemButtonNormalTextureVertexColor(itemButton, 1.0, 1.0, 1.0);
			end
		else
			SetItemButtonNameFrameVertexColor(buybackButton, 0.5, 0.5, 0.5);
			SetItemButtonSlotVertexColor(buybackButton,0.4, 0.4, 0.4);
			_G["MerchantItem"..i.."Name"]:SetText("");
			_G["MerchantItem"..i.."MoneyFrame"]:Hide();
			itemButton:Hide();
		end
	end

	-- Hide all merchant related items
	MerchantRepairAllButton:Hide();
	MerchantRepairItemButton:Hide();
	MerchantBuyBackItem:Hide();
	MerchantPrevPageButton:Hide();
	MerchantNextPageButton:Hide();
	MerchantFrameBottomLeftBorder:Hide();
	MerchantPageText:Hide();
	MerchantGuildBankRepairButton:Hide();
	MerchantSellAllJunkButton:Hide();
end

function MerchantPrevPageButton_OnClick()
	PlaySound(SOUNDKIT.IG_MAINMENU_OPTION_CHECKBOX_ON);
	MerchantFrame.page = MerchantFrame.page - 1;
	MerchantFrame_CloseStackSplitFrame();
	MerchantFrame_Update();
end

function MerchantNextPageButton_OnClick()
	PlaySound(SOUNDKIT.IG_MAINMENU_OPTION_CHECKBOX_ON);
	MerchantFrame.page = MerchantFrame.page + 1;
	MerchantFrame_CloseStackSplitFrame();
	MerchantFrame_Update();
end

function MerchantFrame_CloseStackSplitFrame()
	if ( StackSplitFrame:IsShown() ) then
		local numButtons = max(MERCHANT_ITEMS_PER_PAGE, BUYBACK_ITEMS_PER_PAGE);
		for i = 1, numButtons do
			if ( StackSplitFrame.owner == _G["MerchantItem"..i.."ItemButton"] ) then
				StackSplitCancelButton_OnClick();
				return;
			end
		end
	end
end

function MerchantItemBuybackButton_OnLoad(self)
	self:RegisterEvent("MERCHANT_UPDATE");
	self:RegisterForClicks("LeftButtonUp","RightButtonUp");
	self:RegisterForDrag("LeftButton");

	self.SplitStack = function(button, split)
		if ( split > 0 ) then
			BuyMerchantItem(button:GetID(), split);
		end
	end

	self:SetItemButtonScale(0.65);
end

function MerchantItemButton_OnLoad(self)
	self:RegisterForClicks("LeftButtonUp","RightButtonUp");
	self:RegisterForDrag("LeftButton");

	self.SplitStack = function(button, split)
		if ( button.extendedCost ) then
			MerchantFrame_ConfirmExtendedItemCost(button, split)
		elseif ( button.showNonrefundablePrompt ) then
			MerchantFrame_ConfirmExtendedItemCost(button, split)
		elseif ( split > 0 ) then
			BuyMerchantItem(button:GetID(), split);
		end
	end

	self.UpdateTooltip = MerchantItemButton_OnEnter;
end

MERCHANT_HIGH_PRICE_COST = 1500000;

function MerchantItemButton_OnClick(self, button)
	MerchantFrame.extendedCost = nil;
	MerchantFrame.highPrice = nil;

	if ( MerchantFrame.selectedTab == 1 ) then
		-- Is merchant frame
		if ( button == "LeftButton" ) then
			if ( MerchantFrame.refundItem ) then
				if ( ContainerFrame_GetExtendedPriceString(MerchantFrame.refundItem, MerchantFrame.refundItemEquipped)) then
					-- a confirmation dialog has been shown
					return;
				end
			end

			PickupMerchantItem(self:GetID());
			if ( self.extendedCost ) then
				MerchantFrame.extendedCost = self;
			elseif ( self.showNonrefundablePrompt ) then
				MerchantFrame.extendedCost = self;
			elseif ( self.price and self.price >= MERCHANT_HIGH_PRICE_COST ) then
				MerchantFrame.highPrice = self;
			end
		else
			if ( self.extendedCost ) then
				MerchantFrame_ConfirmExtendedItemCost(self);
			elseif ( self.showNonrefundablePrompt ) then
				MerchantFrame_ConfirmExtendedItemCost(self);
			elseif ( self.price and self.price >= MERCHANT_HIGH_PRICE_COST ) then
				MerchantFrame_ConfirmHighCostItem(self);
			else
				BuyMerchantItem(self:GetID());
			end
		end
	else
		-- Is buyback item
		BuybackItem(self:GetID());
	end
end

function MerchantItemButton_OnModifiedClick(self, button)
	if ( MerchantFrame.selectedTab == 1 ) then
		-- Is merchant frame
		if ( HandleModifiedItemClick(GetMerchantItemLink(self:GetID())) ) then
			return;
		end
		if ( IsModifiedClick("SPLITSTACK")) then
			local maxStack = GetMerchantItemMaxStack(self:GetID());
			local info = C_MerchantFrame.GetItemInfo(self:GetID());

			local canAfford;
			if (info.price and info.price > 0) then
				canAfford = floor(GetMoney() / (info.price / info.stackCount));
			else
				canAfford = maxStack;
			end

			if (info.hasExtendedCost) then
				local itemCount = GetMerchantItemCostInfo(self:GetID());
				for i = 1, MAX_ITEM_COST do
					local itemTexture, itemValue, itemLink, currencyName = GetMerchantItemCostItem(self:GetID(), i);
					if (itemLink and not currencyName) then
						local myCount = C_Item.GetItemCount(itemLink, false, false, true);
						canAfford = min(canAfford, floor(myCount / (itemValue / info.stackCount)));
					end
				end
			end

			if ( maxStack > 1 ) then
				local maxPurchasable = min(maxStack, canAfford);
				StackSplitFrame:OpenStackSplitFrame(maxPurchasable, self, "BOTTOMLEFT", "TOPLEFT", info.stackCount);
			end
			return;
		end
	else
		HandleModifiedItemClick(GetBuybackItemLink(self:GetID()));
	end
end

function MerchantItemButton_OnEnter(button)
	GameTooltip:SetOwner(button, "ANCHOR_RIGHT");
	if ( MerchantFrame.selectedTab == 1 ) then
		GameTooltip:SetMerchantItem(button:GetID());
		GameTooltip_ShowCompareItem(GameTooltip);
		MerchantFrame.itemHover = button:GetID();
	else
		GameTooltip:SetBuybackItem(button:GetID());
		if ( IsModifiedClick("DRESSUP") and button.hasItem ) then
			ShowInspectCursor();
		else
			ShowBuybackSellCursor(button:GetID());
		end
	end
end

LIST_DELIMITER = ", "

local function ShouldAppendSpecText(itemLink)
	if C_Item.IsItemBindToAccountUntilEquip(itemLink) then
		local _itemID, _itemType, _itemSubType, _itemEquipLoc, _icon, classID, subclassID = C_Item.GetItemInfoInstant(itemLink) ;
		-- If the merchant item is "Warbound until equipped", then we only want to show a list of specs for weapons and shields
		local isWeapon = classID == Enum.ItemClass.Weapon;
		local isShield = (classID == Enum.ItemClass.Armor) and (subclassID == Enum.ItemArmorSubclass.Shield);
		return isWeapon or isShield;
	end

	return true;
end

function MerchantFrame_ConfirmExtendedItemCost(itemButton, numToPurchase)
	local index = itemButton:GetID();
	local itemsString;
	if ( GetMerchantItemCostInfo(index) == 0 and not itemButton.showNonrefundablePrompt) then
		if ( itemButton.price and itemButton.price >= MERCHANT_HIGH_PRICE_COST ) then
			MerchantFrame_ConfirmHighCostItem(itemButton);
		else
			BuyMerchantItem( itemButton:GetID(), numToPurchase );
		end
		return;
	end

	MerchantFrame.itemIndex = index;
	MerchantFrame.count = numToPurchase;

	local stackCount = itemButton.count or 1;
	numToPurchase = numToPurchase or stackCount;

	local maxQuality = 0;
	local usingCurrency = false;
	for i=1, MAX_ITEM_COST do
		local itemTexture, costItemCount, costItemLink, currencyName = GetMerchantItemCostItem(index, i);
		costItemCount = costItemCount * (numToPurchase / stackCount); -- cost per stack times number of stacks
		if ( currencyName ) then
			usingCurrency = true;
			if ( itemsString ) then
				itemsString = itemsString .. ", |T"..itemTexture..":0:0:0:-1|t ".. format(CURRENCY_QUANTITY_TEMPLATE, costItemCount, currencyName);
			else
				itemsString = " |T"..itemTexture..":0:0:0:-1|t "..format(CURRENCY_QUANTITY_TEMPLATE, costItemCount, currencyName);
			end
		elseif ( costItemLink ) then
			local itemName, itemLink, itemQuality = C_Item.GetItemInfo(costItemLink);

			if ( i == 1 and GetMerchantItemCostInfo(index) == 1 ) then
				local limitedCurrencyItemInfo = MerchantFrame_GetLimitedCurrencyItemInfo(itemLink);
				if ( limitedCurrencyItemInfo ) then
					MerchantFrame_ConfirmLimitedCurrencyPurchase(itemButton, limitedCurrencyItemInfo, numToPurchase, costItemCount);
					return;
				end
			end

			maxQuality = math.max(itemQuality, maxQuality);
			if ( itemsString ) then
				itemsString = itemsString .. LIST_DELIMITER .. format(ITEM_QUANTITY_TEMPLATE, costItemCount, itemLink);
			else
				itemsString = format(ITEM_QUANTITY_TEMPLATE, costItemCount, itemLink);
			end
		end
	end
	if ( itemButton.showNonrefundablePrompt and itemButton.price ) then
		if ( itemsString ) then
			itemsString = itemsString .. LIST_DELIMITER .. GetMoneyString(itemButton.price);
		else
			if itemButton.price < MERCHANT_HIGH_PRICE_COST then
				BuyMerchantItem( itemButton:GetID(), numToPurchase );
				return;
			end
			itemsString = GetMoneyString(itemButton.price);
		end
	end

	if ( not usingCurrency and maxQuality <= Enum.ItemQuality.Uncommon and not itemButton.showNonrefundablePrompt) or (not itemsString and not itemButton.price) then
		BuyMerchantItem( itemButton:GetID(), numToPurchase );
		return;
	end

	local popupData, specs = MerchantFrame_GetProductInfo(itemButton);
	popupData.count = numToPurchase;

	local specText;
	if (ShouldAppendSpecText(itemButton.link) and specs and #specs > 0) then
		specText = "\n\n";
		for i=1, #specs do
			local specID, specName, specDesc, specIcon = GetSpecializationInfoByID(specs[i], UnitSex("player"));
			specText = specText.." |T"..specIcon..":0:0:0:-1|t "..NORMAL_FONT_COLOR_CODE..specName..FONT_COLOR_CODE_CLOSE;
			if (i < #specs) then
				specText = specText..PLAYER_LIST_DELIMITER
			end
		end
	else
		specText = "";
	end

	if (itemButton.showNonrefundablePrompt) then
		StaticPopup_Show("CONFIRM_PURCHASE_NONREFUNDABLE_ITEM", itemsString, specText, popupData );
	else
		StaticPopup_Show("CONFIRM_PURCHASE_TOKEN_ITEM", itemsString, specText, popupData );
	end
end

function MerchantFrame_GetProductInfo(itemButton)
	local itemName, itemHyperlink;
	local itemQuality = 1;
	local r, g, b = 1, 1, 1;
	if(itemButton.link) then
		itemName, itemHyperlink, itemQuality = C_Item.GetItemInfo(itemButton.link);
	end

	local specs = {};
	if ( itemName ) then
		--It's an item
		r, g, b = C_Item.GetItemQualityColor(itemQuality);
		specs = C_Item.GetItemSpecInfo(itemButton.link);
	else
		--Not an item. Could be currency or something. Just use what's on the button.
		itemName = itemButton.name;
		r, g, b = C_Item.GetItemQualityColor(1);
	end

	local productInfo = {
		texture = itemButton.texture,
		name = itemName,
		color = {r, g, b, 1},
		link = itemButton.link,
		index = itemButton:GetID(),
	};

	return productInfo, specs;
end

function MerchantFrame_ResetRefundItem()
	MerchantFrame.refundItem = nil;
	MerchantFrame.refundItemEquipped = nil;
end

function MerchantFrame_SetRefundItem(item, isEquipped)
	MerchantFrame.refundItem = item;
	MerchantFrame.refundItemEquipped = isEquipped;
end

function MerchantFrame_ConfirmHighCostItem(itemButton, quantity)
	quantity = (quantity or 1);
	local index = itemButton:GetID();

	MerchantFrame.itemIndex = index;
	MerchantFrame.count = quantity;
	MerchantFrame.price = itemButton.price;
	StaticPopup_Show("CONFIRM_HIGH_COST_ITEM", itemButton.link);
end

function MerchantFrame_GetLimitedCurrencyItemInfo(itemLink)
	local itemName, iconFileID, quantity, maxQuantity, totalEarned = C_Item.GetLimitedCurrencyItemInfo(itemLink);
	if not itemName then
		return nil;
	end

	return { ["name"] = itemName, ["iconFileID"] = iconFileID, ["quantity"] = quantity, ["maxQuantity"] = maxQuantity, ["totalEarned"] = totalEarned, };
end

function MerchantFrame_ConfirmLimitedCurrencyPurchase(itemButton, currencyInfo, numToPurchase, totalCurrencyCost)
	local currencyIcon = CreateTextureMarkup(currencyInfo.iconFileID, 64, 64, 16, 16, 0, 1, 0, 1, 0, 0);
	local costString = currencyIcon .. totalCurrencyCost .. " " .. currencyInfo.name;

	local alreadySpent = currencyInfo.totalEarned - currencyInfo.quantity;
	-- The amount of this limited currency that the player currently has + the amount that they can still earn
	local unusedAmount = currencyInfo.maxQuantity - alreadySpent;
	local isFinalPurchase = (unusedAmount - totalCurrencyCost <= 0);

	local popupData = MerchantFrame_GetProductInfo(itemButton);
	popupData.count = numToPurchase;
	if isFinalPurchase then
		popupData.confirmationText = LIMITED_CURRENCY_PURCHASE_FINAL:format(currencyInfo.name, currencyInfo.name, costString);
	else
		popupData.confirmationText = LIMITED_CURRENCY_PURCHASE:format(costString, unusedAmount - totalCurrencyCost, currencyInfo.name, costString)
	end

	StaticPopup_Show("CONFIRM_PURCHASE_ITEM_DELAYED", nil, nil, popupData);
end

function MerchantFrame_UpdateCanRepairAll()
	if ( MerchantRepairAllButton.Icon ) then
		local repairAllCost, canRepair = GetRepairAllCost();
		if ( canRepair ) then
			SetDesaturation(MerchantRepairAllButton.Icon, false);
			MerchantRepairAllButton:Enable();
		else
			SetDesaturation(MerchantRepairAllButton.Icon, true);
			MerchantRepairAllButton:Disable();
		end
	end
end

function MerchantFrame_UpdateGuildBankRepair()
	local repairAllCost, canRepair = GetRepairAllCost();
	if ( canRepair ) then
		SetDesaturation(MerchantGuildBankRepairButton.Icon, false);
		MerchantGuildBankRepairButton:Enable();
	else
		SetDesaturation(MerchantGuildBankRepairButton.Icon, true);
		MerchantGuildBankRepairButton:Disable();
	end
end

function MerchantFrame_UpdateRepairButtons()
	if ( CanMerchantRepair() ) then
		--See if can guildbank repair
		if ( CanGuildBankRepair() ) then
			MerchantRepairAllButton:SetWidth(36);
			MerchantRepairAllButton:SetHeight(36);
			MerchantRepairItemButton:SetWidth(36);
			MerchantRepairItemButton:SetHeight(36);
			MerchantRepairAllButton:SetPoint("BOTTOMRIGHT", MerchantFrame, "BOTTOMLEFT", 96, 33);
			MerchantRepairItemButton:SetPoint("RIGHT", MerchantRepairAllButton, "LEFT", -9, 0);
			MerchantSellAllJunkButton:SetPoint("RIGHT", MerchantRepairAllButton, "LEFT", 128, 0);

			MerchantGuildBankRepairButton:Show();
			MerchantFrame_UpdateGuildBankRepair();
		else
			MerchantRepairAllButton:SetWidth(36);
			MerchantRepairAllButton:SetHeight(36);
			MerchantRepairItemButton:SetWidth(36);
			MerchantRepairItemButton:SetHeight(36);
			MerchantRepairAllButton:SetPoint("BOTTOMRIGHT", MerchantFrame, "BOTTOMLEFT", 118, 33);
			MerchantRepairItemButton:SetPoint("RIGHT", MerchantRepairAllButton, "LEFT", -8, 0);
			MerchantSellAllJunkButton:SetPoint("RIGHT", MerchantRepairAllButton, "LEFT", 80, 0);

			MerchantGuildBankRepairButton:Hide();
		end
		MerchantRepairAllButton:Show();
		MerchantRepairItemButton:Show();
		MerchantFrame_UpdateCanRepairAll();
	else
		MerchantRepairAllButton:Hide();
		MerchantRepairItemButton:Hide();
		MerchantGuildBankRepairButton:Hide();
		MerchantSellAllJunkButton:SetPoint("BOTTOMRIGHT", MerchantFrame, "BOTTOMRIGHT", -148, 33);
	end
end

function MerchantFrame_UpdateCurrencies()
	local currencies = { GetMerchantCurrencies() };

	if ( #currencies == 0 ) then	-- common case
		MerchantFrame:UnregisterEvent("CURRENCY_DISPLAY_UPDATE");
		MerchantMoneyFrame:SetPoint("BOTTOMRIGHT", -4, 8);
		MerchantMoneyFrame:Show();
		MerchantExtraCurrencyInset:Hide();
		MerchantExtraCurrencyBg:Hide();
	else
		MerchantFrame:RegisterEvent("CURRENCY_DISPLAY_UPDATE");
		MerchantExtraCurrencyInset:Show();
		MerchantExtraCurrencyBg:Show();
		MerchantFrame.numCurrencies = #currencies;
		if ( MerchantFrame.numCurrencies > 3 ) then
			MerchantMoneyFrame:Hide();
		else
			MerchantMoneyFrame:SetPoint("BOTTOMRIGHT", -169, 8);
			MerchantMoneyFrame:Show();
		end
		for index = 1, MerchantFrame.numCurrencies do
			local tokenButton = _G["MerchantToken"..index];
			-- if this button doesn't exist yet, create it and anchor it
			if ( not tokenButton ) then
				tokenButton = CreateFrame("BUTTON", "MerchantToken"..index, MerchantFrame, "BackpackTokenTemplate");
				-- token display order is: 6 5 4 | 3 2 1
				if ( index == 1 ) then
					tokenButton:SetPoint("BOTTOMRIGHT", -16, 8);
				elseif ( index == 4 ) then
					tokenButton:SetPoint("BOTTOMLEFT", 89, 8);
				else
					tokenButton:SetPoint("RIGHT", _G["MerchantToken"..index - 1], "LEFT", 0, 0);
				end
				tokenButton:SetScript("OnEnter", MerchantFrame_ShowCurrencyTooltip);
			end

			local currencyInfo = C_CurrencyInfo.GetCurrencyInfo(currencies[index]);
			local name = currencyInfo.name;
			local count = currencyInfo.quantity;
			local icon = currencyInfo.iconFileID;
			if ( name and name ~= "" ) then
				tokenButton.Icon:SetTexture(icon);
				tokenButton.currencyID = currencies[index];
				tokenButton:Show();
				MerchantFrame_UpdateCurrencyButton(tokenButton);
			else
				tokenButton.currencyID = nil;
				tokenButton:Hide();
			end
		end
	end

	for i = #currencies + 1, MAX_MERCHANT_CURRENCIES do
		local tokenButton = _G["MerchantToken"..i];
		if ( tokenButton ) then
			tokenButton.currencyID = nil;
			tokenButton:Hide();
		else
			break;
		end
	end
end

function MerchantFrame_ShowCurrencyTooltip(self)
	GameTooltip:SetOwner(self, "ANCHOR_RIGHT");
	GameTooltip:SetCurrencyByID(self.currencyID);
end

function MerchantFrame_UpdateCurrencyAmounts()
	for i = 1, MAX_MERCHANT_CURRENCIES do
		local tokenButton = _G["MerchantToken"..i];
		if ( tokenButton ) then
			MerchantFrame_UpdateCurrencyButton(tokenButton);
		else
			return;
		end
	end
end

function MerchantFrame_UpdateCurrencyButton(tokenButton)
	if ( tokenButton.currencyID ) then
		local count = C_CurrencyInfo.GetCurrencyInfo(tokenButton.currencyID).quantity;
		local displayCount = count;
		local displayWidth = 50;
		if ( count > 99999 ) then
			if MerchantFrame.numCurrencies == 1 then
				displayWidth = 100;
			else
				displayCount = "*"
			end
		end
		tokenButton.Count:SetText(displayCount);
		tokenButton:SetWidth(displayWidth);
	end
end

function MerchantFrame_OnSellAllJunkButtonConfirmed()
	C_MerchantFrame.SellAllJunkItems();
end

local popupData = { text = SELL_ALL_JUNK_ITEMS_POPUP, callback = MerchantFrame_OnSellAllJunkButtonConfirmed };

function MerchantFrame_OnSellAllJunkButtonClicked()
	GameTooltip:Hide();
	StaticPopup_ShowCustomGenericConfirmation(popupData);
end


function MerchantBuyBackButton_OnEnter(button)
	MerchantBuyBackItem.itemHover = button:GetID();
	GameTooltip:SetOwner(button, "ANCHOR_RIGHT");
	GameTooltip:SetBuybackItem(GetNumBuybackItems());
end

function MerchantBuyBackButton_OnLeave()
	GameTooltip_HideResetCursor();
	MerchantBuyBackItem.itemHover = nil;
end

function UpdateCursorAfterBuyBack(buybackButton)
	if ( MerchantBuyBackItem.itemHover ~= buybackButton:GetID() ) then
		return;
	end

	if (GetNumBuybackItems() == 0) then
		SetCursor("BUY_ERROR_CURSOR");
	else
		SetCursor("BUY_CURSOR");
	end
end

