-------------------------------------------------------------------------------
-- Title: MSBT Options Main
-- Author: Mikord
-------------------------------------------------------------------------------

-- Create module and set its name.
local module = {}
local moduleName = "Main"
MSBTOptions[moduleName] = module

local IsClassic = WOW_PROJECT_ID >= WOW_PROJECT_CLASSIC


-------------------------------------------------------------------------------
-- Imports.
-------------------------------------------------------------------------------

-- Local references to various modules for faster access.
local MSBTControls = MSBTOptions.Controls
local L = MikSBT.translations


-------------------------------------------------------------------------------
-- Constants.
-------------------------------------------------------------------------------

local WINDOW_TITLE = "Mik's Scrolling Battle Text " .. MikSBT.VERSION_STRING


-------------------------------------------------------------------------------
-- Private variables.
-------------------------------------------------------------------------------

-- Prevent tainting global _.
local _

-- The main options frame.
local mainFrame

-- Holds all registered popup frames.
local popupFrames = {}

-- Tab info.
local tabData = {}
local tabListbox

-- Scheduling variables.
local waitTable = {}
local waitFrame = nil


-------------------------------------------------------------------------------
-- Tab functions.
-------------------------------------------------------------------------------

-- ****************************************************************************
-- Initializes the frame that is shown when the tab is clicked.
-- ****************************************************************************
local function InitTab(tabInfo)
		local frame = tabInfo.frame
		frame:SetParent(mainFrame)
		frame:SetPoint("TOPLEFT", mainFrame, "TOPLEFT", 190, -78)
		frame:SetWidth(400)
		frame:SetHeight(350)
	end


-- ****************************************************************************
-- Adds a new tab to the main options frame that will show the passed frame
-- when selected.
-- ****************************************************************************
local function AddTab(frame, text, tooltip)
	local tabInfo = {}
	tabInfo.text = text
	tabInfo.frame = frame
	tabInfo.tooltip = tooltip

	tabData[#tabData+1] = tabInfo

	if (tabListbox) then
		InitTab(tabInfo)
		tabListbox:AddItem(#tabData)
	end
end


-- ****************************************************************************
-- Called by listbox to create a line for the tabs on the left.
-- ****************************************************************************
local function CreateTabLine(this)
	local frame = CreateFrame("Button", nil, this)

	local fontString = frame:CreateFontString(nil, "OVERLAY", "GameFontNormalSmall")
	fontString:SetPoint("LEFT", frame, "LEFT")
	fontString:SetPoint("RIGHT", frame, "RIGHT")

	frame.fontString = fontString
	frame.tooltipAnchor = "ANCHOR_LEFT"
	return frame
end


-- ****************************************************************************
-- Called by listbox to display a line for the tabs on the left.
-- ****************************************************************************
local function DisplayTabLine(this, line, key, isSelected)
	line.fontString:SetText(tabData[key].text)
	line.tooltip = tabData[key].tooltip
	local color = isSelected and HIGHLIGHT_FONT_COLOR or NORMAL_FONT_COLOR
	line.fontString:SetTextColor(color.r, color.g, color.b)
end


-- ****************************************************************************
-- Called when a tab line is clicked.
-- ****************************************************************************
local function OnClickTabLine(this, line, value)
	-- Hide all the tab frames.
	for _, info in ipairs(tabData) do
		info.frame:Hide()
	end

	-- Hide the registered popup frames.
	for frame in pairs(popupFrames) do
		frame:Hide()
	end

	-- Show the tab's associated frame.
	local frame = tabData[value].frame
	if (frame) then frame:Show() end

	-- Force a refresh to the listbox to update the highlight font color.
	tabListbox:Refresh()
end


-------------------------------------------------------------------------------
-- Main options frame functions.
-------------------------------------------------------------------------------

-- ****************************************************************************
-- Called when the main options frame is hidden.
-- ****************************************************************************
local function OnHideMainFrame(this)
	PlaySound(799)
	-- Hide the registered popup frames.
	for frame in pairs(popupFrames) do
		frame:Hide()
	end
end


-- ****************************************************************************
-- Creates the main options frame.
-- ****************************************************************************
local function CreateMainFrame()
	-- Main frame.
	mainFrame = CreateFrame("Frame", "MSBTMainOptionsFrame", UIParent)
	mainFrame:EnableMouse(true)
	mainFrame:SetMovable(true)
	mainFrame:RegisterForDrag("LeftButton")
	--mainFrame:SetToplevel(true)
	mainFrame:SetClampedToScreen(true)
	mainFrame:SetWidth(608)
	mainFrame:SetHeight(440)
	mainFrame:SetPoint("CENTER")
	mainFrame:SetHitRectInsets(0, 0, 0, 0)
	mainFrame:SetScript("OnHide", OnHideMainFrame)

	mainFrame:SetScript("OnShow", function(self)
			PlaySound(SOUNDKIT.IG_MAINMENU_OPTION)
	end)
	mainFrame:SetScript("OnDragStart", function(self)
			self:StartMoving()
	end)
	mainFrame:SetScript("OnDragStop", function(self)
			self:StopMovingOrSizing()
	end)

	-- Title region.
	--[[local titleRegion = mainFrame:CreateTitleRegion()
	titleRegion:SetWidth(525)
	titleRegion:SetHeight(20)
	titleRegion:SetPoint("TOPLEFT", mainFrame, "TOPLEFT", 50, -10)]]

	-- Scroll Icon.
	local texture = mainFrame:CreateTexture(nil, "BACKGROUND")
	texture:SetTexture("Interface\\FriendsFrame\\FriendsFrameScrollIcon")
	texture:SetWidth(64)
	texture:SetHeight(64)
	texture:SetPoint("TOPLEFT", mainFrame, "TOPLEFT", 8, 1)

	-- Top left.
	texture = mainFrame:CreateTexture(nil, "ARTWORK")
	texture:SetTexture("Interface\\PaperDollInfoFrame\\UI-Character-General-TopLeft")
	texture:SetWidth(256)
	texture:SetHeight(256)
	texture:SetPoint("TOPLEFT")

	-- Top center left.
	texture = mainFrame:CreateTexture(nil, "ARTWORK")
	texture:SetTexture("Interface\\PaperDollInfoFrame\\UI-Character-General-TopLeft")
	texture:SetWidth(128)
	texture:SetHeight(256)
	texture:SetPoint("TOPLEFT", mainFrame, "TOPLEFT", 256, 0)
	texture:SetTexCoord(0.38, 0.88, 0, 1)

	-- Top center right.
	texture = mainFrame:CreateTexture(nil, "ARTWORK")
	texture:SetTexture("Interface\\PaperDollInfoFrame\\UI-Character-General-TopLeft")
	texture:SetWidth(128)
	texture:SetHeight(256)
	texture:SetPoint("TOPLEFT", mainFrame, "TOPLEFT", 384, 0)
	texture:SetTexCoord(0.45, 0.95, 0, 1)

	-- Top right.
	texture = mainFrame:CreateTexture(nil, "ARTWORK")
	texture:SetTexture("Interface\\PaperDollInfoFrame\\UI-Character-General-TopRight")
	texture:SetWidth(100)
	texture:SetHeight(256)
	texture:SetPoint("TOPRIGHT")
	texture:SetTexCoord(0, 0.78125, 0, 1)

	-- Bottom left.
	texture = mainFrame:CreateTexture(nil, "ARTWORK")
	texture:SetTexture("Interface\\PaperDollInfoFrame\\UI-Character-General-BottomLeft")
	texture:SetWidth(256)
	texture:SetHeight(184)
	texture:SetPoint("BOTTOMLEFT")
	texture:SetTexCoord(0, 1, 0, 0.71875)

	-- Bottom center left.
	texture = mainFrame:CreateTexture(nil, "ARTWORK")
	texture:SetTexture("Interface\\PaperDollInfoFrame\\UI-Character-General-BottomLeft")
	texture:SetWidth(128)
	texture:SetHeight(184)
	texture:SetPoint("BOTTOMLEFT", mainFrame, "BOTTOMLEFT", 256, 0)
	texture:SetTexCoord(0.5, 1, 0, 0.71875)

	-- Bottom center right.
	texture = mainFrame:CreateTexture(nil, "ARTWORK")
	texture:SetTexture("Interface\\PaperDollInfoFrame\\UI-Character-General-BottomLeft")
	texture:SetWidth(128)
	texture:SetHeight(184)
	texture:SetPoint("BOTTOMLEFT", mainFrame, "BOTTOMLEFT", 384, 0)
	texture:SetTexCoord(0.5, 1, 0, 0.71875)

	-- Bottom right.
	texture = mainFrame:CreateTexture(nil, "ARTWORK")
	texture:SetTexture("Interface\\PaperDollInfoFrame\\UI-Character-General-BottomRight")
	texture:SetWidth(100)
	texture:SetHeight(184)
	texture:SetPoint("BOTTOMRIGHT")
	texture:SetTexCoord(0, 0.78125, 0, 0.71875)

	-- Top vertical.
	texture = mainFrame:CreateTexture(nil, "OVERLAY")
	texture:SetTexture("Interface\\PaperDollInfoFrame\\UI-Character-General-TopRight")
	texture:SetWidth(8)
	texture:SetHeight(184)
	texture:SetPoint("TOPLEFT", mainFrame, "TOPLEFT", 180, -72)
	texture:SetTexCoord(0.648437, 0.7109375, 0.28125, 1.0)

	-- Bottom vertical.
	texture = mainFrame:CreateTexture(nil, "OVERLAY")
	texture:SetTexture("Interface\\PaperDollInfoFrame\\UI-Character-General-TopRight")
	texture:SetWidth(8)
	texture:SetHeight(174)
	texture:SetPoint("TOPLEFT", mainFrame, "TOPLEFT", 180, -256)
	texture:SetTexCoord(0.648437, 0.7109375, 0.3203125, 1.0)

	-- Window title.
	local fontString = mainFrame:CreateFontString(nil, "OVERLAY", "GameFontNormal")
	fontString:SetText(WINDOW_TITLE)
	fontString:SetPoint("TOP", mainFrame, "TOP", 0, -18)

	-- Close Button.
	local frame = CreateFrame("Button", nil, mainFrame, "UIPanelCloseButton")
	if IsClassic then
		frame:SetPoint("TOPRIGHT", mainFrame, "TOPRIGHT", -3, -8)
	else
		frame:SetPoint("TOPRIGHT", mainFrame, "TOPRIGHT", -7, -12)
	end


	-- Setup the tabs listbox.
	tabListbox = MSBTControls.CreateListbox(mainFrame)
	tabListbox:Configure(150, 350, 20)
	tabListbox:SetPoint("TOPLEFT", mainFrame, "TOPLEFT", 30, -78)
	tabListbox:SetCreateLineHandler(CreateTabLine)
	tabListbox:SetDisplayHandler(DisplayTabLine)
	tabListbox:SetClickHandler(OnClickTabLine)

	-- Add registered tabs.
	for k, tabInfo in ipairs(tabData) do
		InitTab(tabInfo)
		tabListbox:AddItem(k)
	end

	-- Select the general tab.
	tabListbox:SetSelectedItem(2)
	tabListbox:Refresh()
	tabData[2].frame:Show()

	-- Insert the frame name into the UISpecialFrames array so it closes when
	-- the escape key is pressed.
	--table.insert(UISpecialFrames, mainFrame:GetName())
end


-- ****************************************************************************
-- Shows the main options frame after creating it (if it hasn't already been).
-- ****************************************************************************
local function ShowMainFrame()
	if (not mainFrame) then CreateMainFrame() end
	if (not MSBTScrollAreasConfigFrame or not MSBTScrollAreasConfigFrame:IsShown()) then
		mainFrame:Show()
	end
end


-- ****************************************************************************
-- Hides the main options frame.
-- ****************************************************************************
local function HideMainFrame()
	mainFrame:Hide()
end


-- ****************************************************************************
-- Registers frames that float above the main options window.
-- These frames will be hidden when a tab is selected or the main options
-- window is hidden.
-- ****************************************************************************
local function RegisterPopupFrame(frame)
	if (not popupFrames[frame]) then popupFrames[frame] = true end
end


-------------------------------------------------------------------------------
-- Scheduling functions.
-------------------------------------------------------------------------------

-- ****************************************************************************
-- Registers frames that float above the main options window.
-- These frames will be hidden when a tab is selected or the main options
-- window is hidden.
-- ****************************************************************************
local function ScheduleCallback(delay, func, ...)
	if (waitFrame == nil) then
		waitFrame = CreateFrame("Frame", nil, UIParent)
		waitFrame:SetScript("OnUpdate",function (self, elapsed)
			local count = #waitTable
			local i = 1
			while (i <= count) do
				local waitRecord = tremove(waitTable, i)
				local duration = tremove(waitRecord, 1)
				local func = tremove(waitRecord, 1)
				local params = tremove(waitRecord, 1)
				if (duration > elapsed) then
					tinsert(waitTable, i, {duration - elapsed, func, params})
					i = i + 1
				else
					count = count - 1
					func(unpack(params))
				end
			end
		end)
	end
	tinsert(waitTable, {delay, func, {...}})
	return true
end



-------------------------------------------------------------------------------
-- Module interface.
-------------------------------------------------------------------------------

-- Protected Functions.
module.ShowMainFrame		= ShowMainFrame
module.HideMainFrame		= HideMainFrame
module.RegisterPopupFrame	= RegisterPopupFrame
module.AddTab				= AddTab
module.ScheduleCallback		= ScheduleCallback
