MetaHuntOptions = nil
local MTH_OPTIONS_SETUP = {}     -- Track which frames have been set up
MTH_OPTIONS_CONST = MTH_OPTIONS_CONST or {}
MTH_OPTIONS_CONST.NAV_DEFAULT_WIDTH = MTH_OPTIONS_CONST.NAV_DEFAULT_WIDTH or 120
MTH_OPTIONS_CONST.WINDOW_PADDING = MTH_OPTIONS_CONST.WINDOW_PADDING or 12
MTH_OPTIONS_CONST.CONTENT_TOP_OFFSET = MTH_OPTIONS_CONST.CONTENT_TOP_OFFSET or -72
MTH_OPTIONS_CONST.CONTENT_HEIGHT = MTH_OPTIONS_CONST.CONTENT_HEIGHT or 540
MTH_OPTIONS_CONST.CLOSE_BTN_SIZE = MTH_OPTIONS_CONST.CLOSE_BTN_SIZE or 22
MTH_OPTIONS_CONST.CLOSE_BTN_OFFSET_X = MTH_OPTIONS_CONST.CLOSE_BTN_OFFSET_X or -8
MTH_OPTIONS_CONST.CLOSE_BTN_OFFSET_Y = MTH_OPTIONS_CONST.CLOSE_BTN_OFFSET_Y or -8
local MTH_OPTIONS_SHELL_READY = MTH_OptionsRequire and MTH_OptionsRequire("options-shell", {
	"MTH_GetFrame",
	"MTH_BuildOptionsTree",
})

local function MTH_RegisterEscClose(frameName)
	if not (frameName and UISpecialFrames) then
		return
	end
	for i = 1, table.getn(UISpecialFrames) do
		if UISpecialFrames[i] == frameName then
			return
		end
	end
	table.insert(UISpecialFrames, frameName)
end

local function MTH_EnsureOptionsFrame()
	if MetaHuntOptions then
		return MetaHuntOptions
	end

	MetaHuntOptions = CreateFrame("Frame", "MetaHuntOptions", UIParent, "MetaHuntOptionsTemplate")
	if not MetaHuntOptions then
		if MTH and MTH.Print then
			MTH:Print("[MTH OPTIONS] Failed to create MetaHuntOptions", "error")
		end
		return nil
	end
	MTH_RegisterEscClose("MetaHuntOptions")

	local nav = MTH_GetFrame("MetaHuntOptionsNav")
	if nav and nav.SetBackdropColor then
		nav:SetBackdropColor(0.08, 0.08, 0.08, 0.95)
		nav:SetBackdropBorderColor(0.25, 0.25, 0.25, 1)
	end

	local nav = MTH_GetFrame("MetaHuntOptionsNav")
	local navWidth = nav and nav:GetWidth() or MTH_OPTIONS_CONST.NAV_DEFAULT_WIDTH
	local contentLeft = MTH_OPTIONS_CONST.WINDOW_PADDING + navWidth + MTH_OPTIONS_CONST.WINDOW_PADDING
	local contentWidth = (MetaHuntOptions:GetWidth() or 720) - contentLeft - MTH_OPTIONS_CONST.WINDOW_PADDING
	for i = 1, table.getn(MTH_OPTIONS_TABS) do
		local frame = MTH_GetFrame(MTH_OPTIONS_TABS[i].frame)
		if frame then
			frame:ClearAllPoints()
			frame:SetPoint("TOPLEFT", MetaHuntOptions, "TOPLEFT", contentLeft, MTH_OPTIONS_CONST.CONTENT_TOP_OFFSET)
			frame:SetWidth(contentWidth)
			frame:SetHeight(MTH_OPTIONS_CONST.CONTENT_HEIGHT)
			frame:SetFrameLevel(MetaHuntOptions:GetFrameLevel() + 1)
			frame:EnableMouse(true)
			frame:Hide()
		end
	end

	local closeBtn = MTH_GetFrame("MetaHuntOptionsCloseButton")
	if closeBtn then
		closeBtn:ClearAllPoints()
		closeBtn:SetPoint("TOPRIGHT", MetaHuntOptions, "TOPRIGHT", MTH_OPTIONS_CONST.CLOSE_BTN_OFFSET_X, MTH_OPTIONS_CONST.CLOSE_BTN_OFFSET_Y)
		closeBtn:SetWidth(MTH_OPTIONS_CONST.CLOSE_BTN_SIZE)
		closeBtn:SetHeight(MTH_OPTIONS_CONST.CLOSE_BTN_SIZE)
		closeBtn:SetText("X")
		closeBtn:SetScript("OnClick", function() MetaHuntOptions:Hide() end)
	end

	MTH_BuildOptionsTree()
	MTH_SelectOptionsTab("General")

	return MetaHuntOptions
end

function MTH_SelectOptionsTab(tabKey)
	if not MTH_OPTIONS_SHELL_READY then return end
	local optionsFrame = MTH_EnsureOptionsFrame()
	if not optionsFrame then
		return
	end
	MTH_OPTIONS_STATE = MTH_OPTIONS_STATE or {}
	MTH_OPTIONS_STATE.activeTab = tabKey
	MTH_OPTIONS_ACTIVE_TAB = tabKey

	for i = 1, table.getn(MTH_OPTIONS_TABS) do
		local frame = MTH_GetFrame(MTH_OPTIONS_TABS[i].frame)
		if frame then
			frame:Hide()
		end
	end

	for i = 1, table.getn(MTH_OPTIONS_TABS) do
		if MTH_OPTIONS_TABS[i].key == tabKey then
			local frame = MTH_GetFrame(MTH_OPTIONS_TABS[i].frame)
			if frame then
				frame:Show()
			end
		end
	end
	MTH_BuildOptionsTree()

	if tabKey == "General" then
		if MTH_SetupGeneralOptions then
			MTH_SetupGeneralOptions()
			MTH_OPTIONS_SETUP["General"] = true
		end
	elseif tabKey == "Pet" then
		if not MTH_OPTIONS_SETUP["Pet"] then
			MTH_SetupPetOptions()
			MTH_OPTIONS_SETUP["Pet"] = true
		end
	elseif tabKey == "Track" then
		if not MTH_OPTIONS_SETUP["Track"] then
			MTH_SetupTrackOptions()
			MTH_OPTIONS_SETUP["Track"] = true
		end
	elseif tabKey == "Aspect" then
		if not MTH_OPTIONS_SETUP["Aspect"] then
			MTH_SetupAspectOptions()
			MTH_OPTIONS_SETUP["Aspect"] = true
		end
	elseif tabKey == "Trap" then
		if not MTH_OPTIONS_SETUP["Trap"] then
			MTH_SetupTrapOptions()
			MTH_OPTIONS_SETUP["Trap"] = true
		end
	elseif tabKey == "Ammo" then
		if not MTH_OPTIONS_SETUP["Ammo"] then
			MTH_SetupAmmoOptions()
			MTH_OPTIONS_SETUP["Ammo"] = true
		else
			MTH_SetupAmmoOptions()
		end
	elseif tabKey == "Mounts" then
		if not MTH_OPTIONS_SETUP["Mounts"] then
			MTH_SetupMountsOptions()
			MTH_OPTIONS_SETUP["Mounts"] = true
		end
	elseif tabKey == "Companions" then
		if not MTH_OPTIONS_SETUP["Companions"] then
			MTH_SetupCompanionsOptions()
			MTH_OPTIONS_SETUP["Companions"] = true
		end
	elseif tabKey == "Toys" then
		if not MTH_OPTIONS_SETUP["Toys"] then
			MTH_SetupToysOptions()
			MTH_OPTIONS_SETUP["Toys"] = true
		end
	elseif tabKey == "SmartAmmo" then
		if not MTH_OPTIONS_SETUP["SmartAmmo"] then
			MTH_SetupSmartAmmoOptions()
			MTH_OPTIONS_SETUP["SmartAmmo"] = true
		end
	elseif tabKey == "FeedOMatic" then
		if not MTH_OPTIONS_SETUP["FeedOMatic"] then
			MTH_SetupFeedOMaticOptions()
			MTH_OPTIONS_SETUP["FeedOMatic"] = true
		end
		MTH_RefreshFeedOMaticOptions()
	elseif tabKey == "AutoBuy" then
		if not MTH_OPTIONS_SETUP["AutoBuy"] then
			MTH_SetupAutoBuyOptions()
			MTH_OPTIONS_SETUP["AutoBuy"] = true
		else
			MTH_SetupAutoBuyOptions()
		end
	elseif tabKey == "Credits" then
		local setupCredits = _G and _G["MTH_SetupCreditsOptions"]
		if type(setupCredits) == "function" then
			setupCredits()
		end
		MTH_OPTIONS_SETUP["Credits"] = true
	elseif string.sub(tabKey or "", 1, 11) == "Chronometer" then
		if not MTH_OPTIONS_SETUP[tabKey] then
			if _G then
				_G.MTH_CHRON_OPTIONS_SECTION = tabKey
			end
			if type(MTH_SetupChronometerOptions) == "function" then
				MTH_SetupChronometerOptions()
				MTH_OPTIONS_SETUP[tabKey] = true
			elseif MTH and MTH.Print then
				MTH:Print("Chronometer options module not loaded", "error")
			end
		else
			if _G then
				_G.MTH_CHRON_OPTIONS_SECTION = tabKey
			end
			if type(MTH_RefreshChronometerOptions) == "function" then
				MTH_RefreshChronometerOptions()
			elseif type(MTH_SetupChronometerOptions) == "function" then
				MTH_SetupChronometerOptions()
			end
		end
	end
end

function MTH_ResetAndSelectOptionsTab(tabKey)
	if not MTH_OPTIONS_SHELL_READY then return end
	if not tabKey then
		return
	end
	MTH_OPTIONS_SETUP[tabKey] = nil
	MTH_SelectOptionsTab(tabKey)
end

function MTH_OpenOptions(tabKey)
	if not MTH_OPTIONS_SHELL_READY then return end
	local optionsFrame = MTH_EnsureOptionsFrame()
	if not optionsFrame then
		return
	end
	optionsFrame:Show()
	MTH_SelectOptionsTab(tabKey or "General")
end