-------------------------------------------------------------------------------
-- Title: MSBT Options Main
-- Author: Mik
-------------------------------------------------------------------------------

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


-------------------------------------------------------------------------------
-- 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.
-------------------------------------------------------------------------------

-- The main options frame.
local mainFrame;

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

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


-------------------------------------------------------------------------------
-- 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)
 -- 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:SetMovable(true);
 mainFrame:EnableMouse(true);
 mainFrame:SetToplevel(true);
 mainFrame:SetClampedToScreen(true);
 mainFrame:SetWidth(608);
 mainFrame:SetHeight(440);
 mainFrame:SetPoint("CENTER");
 mainFrame:SetHitRectInsets(0, 35, 0, 0);
 mainFrame:SetScript("OnHide", OnHideMainFrame);

 -- 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");
 frame:SetPoint("TOPRIGHT", mainFrame, "TOPRIGHT", -3, -8);

 
 -- 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 first tab.
 tabListbox:SetSelectedItem(1);
 tabListbox:Refresh();
 tabData[1].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




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

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