-- Neuron is a World of Warcraft® user interface addon.
-- Copyright (c) 2017-2021 Britt W. Yazel
-- Copyright (c) 2006-2014 Connor H. Chenoweth
-- This code is licensed under the MIT license (see LICENSE for details)


local _, addonTable = ...

local Spec = addonTable.utilities.Spec
local DBFixer = addonTable.utilities.DBFixer
local Array = addonTable.utilities.Array
local ButtonBinder = addonTable.overlay.ButtonBinder
local ButtonEditor = addonTable.overlay.ButtonEditor
local BarEditor = addonTable.overlay.BarEditor

---@class Neuron : AceAddon-3.0 @define The main addon object for the Neuron Action Bar addon
addonTable.Neuron = LibStub("AceAddon-3.0"):NewAddon(CreateFrame("Frame", nil, UIParent), "Neuron", "AceConsole-3.0", "AceEvent-3.0", "AceHook-3.0", "AceTimer-3.0", "AceSerializer-3.0")
local Neuron = addonTable.Neuron

local DB

local LibDeflate = LibStub:GetLibrary("LibDeflate")
local L = LibStub("AceLocale-3.0"):GetLocale("Neuron")

local LATEST_VERSION_NUM = "1.4.1" --this variable is set to popup a welcome message upon updating/installing. Only change it if you want to pop up a message after the users next update

--prepare the Neuron table with some sub-tables that will be used down the road
Neuron.bars = {} --this table will be our main handle for all of our bars.

Neuron.registeredBarData = {}

--these are the database tables that are going to hold our data. They are global because every .lua file needs access to them
Neuron.itemCache = {} --Stores a cache of all items that have been seen by a Neuron button
Neuron.spellCache = {} --Stores a cache of all spells that have been seen by a Neuron button

Neuron.barEditMode = false
Neuron.buttonEditMode = false
Neuron.bindingMode = false

Neuron.isWoWClassicEra = WOW_PROJECT_ID == WOW_PROJECT_CLASSIC
Neuron.isWoWWrathClassic = WOW_PROJECT_ID == WOW_PROJECT_WRATH_CLASSIC
Neuron.isWoWRetail = WOW_PROJECT_ID == WOW_PROJECT_MAINLINE

Neuron.STRATAS = {
	[1] = "BACKGROUND",
	[2] = "LOW",
	[3] = "MEDIUM",
	[4] = "HIGH",
	[5] = "DIALOG",
	[6] = "TOOLTIP"
}

Neuron.TIMERLIMIT = 4
Neuron.SNAPTO_TOLERANCE = 28

Neuron.DEBUG = true

-------------------------------------------------------------------------
--------------------Start of Functions-----------------------------------
-------------------------------------------------------------------------

--- **OnInitialize**, which is called directly after the addon is fully loaded.
--- do init tasks here, like loading the Saved Variables
--- or setting up slash commands.
function Neuron:OnInitialize()
	Neuron.db = LibStub("AceDB-3.0"):New("NeuronProfilesDB", addonTable.databaseDefaults)

	--Check if the current database needs to be migrated, and attempt the migration
	Neuron.db = DBFixer.databaseMigration(Neuron.db)
	DB = Neuron.db.profile

	Neuron.db.RegisterCallback(Neuron, "OnProfileChanged", "RefreshConfig")
	Neuron.db.RegisterCallback(Neuron, "OnProfileCopied", "RefreshConfig")
	Neuron.db.RegisterCallback(Neuron, "OnProfileReset", "RefreshConfig")
	Neuron.db.RegisterCallback(Neuron, "OnDatabaseReset", "RefreshConfig")

	--load saved variables into working variable containers
	Neuron.itemCache = DB.NeuronItemCache
	Neuron.spellCache = DB.NeuronSpellCache

	Neuron.class = select(2, UnitClass("player"))
	Neuron:UpdateStanceStrings()

	StaticPopupDialogs["ReloadUI"] = {
		text = L["ReloadUI"],
		button1 = OKAY,
		OnAccept = function()
			ReloadUI()
		end,
		preferredIndex = 3,  -- avoid some UI taint, see http://www.wowace.com/announcements/how-to-avoid-some-ui-taint/
	}

	--Initialize the Minimap Icon
	Neuron:Minimap_IconInitialize()

	--Initialize the chat commands (i.e. /neuron)
	--Neuron:RegisterChatCommand("neuron", "slashHandler")

	--build all bar and button frames and run initial setup
	Neuron.registeredBarData = Neuron:RegisterBars(DB)
	if DB.firstRun then
		Neuron:InitializeEmptyDatabase(DB)
	end
	Neuron:CreateBarsAndButtons(DB)
end

--- **OnEnable** which gets called during the PLAYER_LOGIN event, when most of the data provided by the game is already present.
--- Do more initialization here, that really enables the use of your addon.
--- Register Events, Hook functions, Create Frames, Get information from
--- the game that wasn't available in OnInitialize
function Neuron:OnEnable()
	if Neuron.DEBUG then
		_G.Neuron = Neuron
	end

	Neuron:RegisterEvent("PLAYER_REGEN_DISABLED")
	Neuron:RegisterEvent("PLAYER_ENTERING_WORLD")
	Neuron:RegisterEvent("SPELLS_CHANGED")
	Neuron:RegisterEvent("CHARACTER_POINTS_CHANGED")
	Neuron:RegisterEvent("LEARNED_SPELL_IN_TAB")

	Neuron:UpdateStanceStrings()

	--this allows for the "Esc" key to disable the Edit Mode instead of bringing up the game menu, but only if an edit mode is activated.

	if not Neuron:IsHooked(GameMenuFrame, "OnUpdate") then
		Neuron:HookScript(GameMenuFrame, "OnUpdate", function(self)

			if Neuron.barEditMode then
				HideUIPanel(self)
				Neuron:ToggleBarEditMode(false)
			end

			if Neuron.buttonEditMode then
				HideUIPanel(self)
				Neuron:ToggleButtonEditMode(false)
			end

			if Neuron.bindingMode then
				HideUIPanel(self)
				Neuron:ToggleBindingMode(false)
			end

		end)
	end

	Neuron:LoginMessage()

	--Load all bars and buttons
	for _,v in pairs(Neuron.bars) do
		v:Load()
	end

	--this is a hack for 10.0. They broke everything with regard to the way addons interface with
	--SecureActionButtons see SecureTemplates.lua SecureActionButton_OnClick() for more information
	SetCVar("ActionButtonUseKeyDown", 0)

	Neuron.NeuronGUI:LoadInterfaceOptions()

end

--- **OnDisable**, which is only called when your addon is manually being disabled.
--- Unhook, Unregister Events, Hide frames that you created.
--- You would probably only use an OnDisable if you want to
--- build a "standby" mode, or be able to toggle modules on/off.
function Neuron:OnDisable()
	SetCVar("ActionButtonUseKeyDown", 1)
end

-------------------------------------------------

function Neuron:PLAYER_REGEN_DISABLED()
	if Neuron.buttonEditMode then
		Neuron:ToggleButtonEditMode(false)
	end

	if Neuron.bindingMode then
		Neuron:ToggleBindingMode(false)
	end

	if Neuron.barEditMode then
		Neuron:ToggleBarEditMode(false)
	end
end


function Neuron:PLAYER_ENTERING_WORLD()
	DB.firstRun = false

	Neuron:UpdateSpellCache()
	Neuron:UpdateStanceStrings()

	--Fix for Titan causing the Main Bar to not be hidden
	if IsAddOnLoaded("Titan") then
		TitanUtils_AddonAdjust("MainMenuBar", true)
	end

	Neuron:HideBlizzardUI(DB)
end

function Neuron:ACTIVE_TALENT_GROUP_CHANGED()
	Neuron:UpdateSpellCache()
	Neuron:UpdateStanceStrings()
end

function Neuron:LEARNED_SPELL_IN_TAB()
	Neuron:UpdateSpellCache()
	Neuron:UpdateStanceStrings()
end

function Neuron:CHARACTER_POINTS_CHANGED()
	Neuron:UpdateSpellCache()
	Neuron:UpdateStanceStrings()
end

function Neuron:SPELLS_CHANGED()
	Neuron:UpdateSpellCache()
	Neuron:UpdateStanceStrings()
end

-------------------------------------------------------------------------
--------------------Profiles---------------------------------------------
-------------------------------------------------------------------------


function Neuron:RefreshConfig(db, profile)
	StaticPopup_Show("ReloadUI")
	Neuron.pendingReload = true
end

-----------------------------------------------------------------


function Neuron:LoginMessage()
	--displays a info window on login for either fresh installs or updates
	if not DB.updateWarning or DB.updateWarning ~= LATEST_VERSION_NUM  then
		if not IsAddOnLoaded("Masque") then
			print(" ")
			print("    You do not currently have Masque installed or enabled.")
			print("    Please consider using Masque for enhancing the visual appearance of Neuron's action buttons.")
			print("    We recommend using Masque: Neuron, the theme made by Soyier for use with Neuron.")
			print(" ")
		end
	end

	DB.updateWarning = LATEST_VERSION_NUM

	if Spec.active(true) > 4 then
		print(" ")
		Neuron:Print("Warning: You do not currently have a specialization selected. Changes to any buttons which have 'Multi Spec' set will not persist.")
		print(" ")
	end

	--Shadowlands warning that will show as long as a player has one button on their ZoneAbilityBar for Shadowlands content
	if Neuron.isWoWRetail and UnitLevel("player") >= 50 and Neuron.db.profile.ZoneAbilityBar[1] and #Neuron.db.profile.ZoneAbilityBar[1].buttons == 1 then
		print(" ")
		Neuron:Print(WrapTextInColorCode("IMPORTANT: Shadowlands content now requires multiple Zone Ability Buttons. Please add at least 3 buttons to your Zone Ability Bar to support this new functionality.", "FF00FFEC"))
		print(" ")
	end
end



--- Creates a table containing provided data
-- @param index, bookType, spellName, altName, spellID, altSpellID, spellType, icon
-- @return curSpell:  Table containing provided data
function Neuron:SetSpellInfo(index, bookType, spellType, spellName, spellID, icon, altName, altSpellID, altIcon)
	local curSpell = {}

	curSpell.index = index
	curSpell.booktype = bookType

	curSpell.spellType = spellType
	curSpell.spellName = spellName
	curSpell.spellID = spellID
	curSpell.icon = icon

	curSpell.altName = altName
	curSpell.altSpellID = altSpellID
	curSpell.altIcon = altIcon

	return curSpell
end

--- "()" indexes added because the Blizzard macro parser uses that to determine the difference of a spell versus a usable item if the two happen to have the same name.
--- I forgot this fact and removed using "()" and it made some macros not represent the right spell /sigh. This note is here so I do not forget again :P - Maul


--- Scans Character Spell Book and creates a table of all known spells.  This table is used to refrence macro spell info to generate tooltips and cooldowns.
---	If a spell is not displaying its tooltip or cooldown, then the spell in the macro probably is not in the database
function Neuron:UpdateSpellCache()
	local sIndexMax = 0
	local numTabs = GetNumSpellTabs()

	for i=1,numTabs do
		local _, _, _, numSlots = GetSpellTabInfo(i)

		sIndexMax = sIndexMax + numSlots
	end

	for i = 1,sIndexMax do
		local spellName, _ = GetSpellBookItemName(i, BOOKTYPE_SPELL) --this returns the baseSpell name, even if it is augmented by talents. I.e. Roll and Chi Torpedo
		local spellType, spellID = GetSpellBookItemInfo(i, BOOKTYPE_SPELL)
		local isPassive
		if spellName then
			isPassive = IsPassiveSpell(i, BOOKTYPE_SPELL)
		end
		local icon = GetSpellTexture(spellID)

		local altName
		local altSpellID
		local altIcon

		if (spellName and spellType ~= "FUTURESPELL") and not isPassive then

			altName, _, altIcon, _, _, _, altSpellID = GetSpellInfo(spellName)

			if spellID == altSpellID then
				altSpellID = nil
				altName = nil
				altIcon = nil
			end

			local spellData = Neuron:SetSpellInfo(i, BOOKTYPE_SPELL, spellType, spellName, spellID, icon, altName, altSpellID, altIcon)

			Neuron.spellCache[(spellName):lower()] = spellData
			Neuron.spellCache[(spellName):lower().."()"] = spellData


			--reverse main and alt so we can put both in the table accurately
			local altSpellData = Neuron:SetSpellInfo(i, BOOKTYPE_SPELL, spellType, altName, altSpellID, altIcon, spellName, spellID, icon)

			if altName and altName ~= spellName then
				Neuron.spellCache[(altName):lower()] = altSpellData
				Neuron.spellCache[(altName):lower().."()"] = altSpellData
			end

		end
	end

	if Neuron.isWoWRetail then
		for i = 1, select("#", GetProfessions()) do
			local index = select(i, GetProfessions())

			if index then
				local _, _, _, _, numSpells, spelloffset = GetProfessionInfo(index)

				for j=1,numSpells do

					local offsetIndex = j + spelloffset
					local spellName, _ = GetSpellBookItemName(offsetIndex, BOOKTYPE_PROFESSION)
					local spellType, spellID = GetSpellBookItemInfo(offsetIndex, BOOKTYPE_PROFESSION)
					local icon

					if spellName and spellType ~= "FUTURESPELL" then
						icon = GetSpellTexture(spellID)
						local spellData = Neuron:SetSpellInfo(offsetIndex, BOOKTYPE_PROFESSION, spellType, spellName, spellID, icon,nil,  nil, nil)

						Neuron.spellCache[(spellName):lower()] = spellData
						Neuron.spellCache[(spellName):lower().."()"] = spellData

					end
				end
			end
		end
	end
end

function Neuron:ToggleMainMenu()
	---need to run the command twice for some reason. The first one only seems to open the Interface panel
	InterfaceOptionsFrame_OpenToCategory("Neuron");
	InterfaceOptionsFrame_OpenToCategory("Neuron");
end

function Neuron:ToggleBarEditMode(show)
	if show then
		Neuron.barEditMode = true
		Neuron:ToggleButtonEditMode(false)
		Neuron:ToggleBindingMode(false)

		for _, bar in pairs(Neuron.bars) do
			bar.editFrame =
				bar.editFrame or
				BarEditor.allocate(bar, function(overlay, button, down)
					overlay.bar:OnClick(button, down)
				end)

			bar:UpdateObjectVisibility(true)
			bar:UpdateBarStatus(true)
			bar:UpdateObjectStatus()
		end

		--if there is no bar selected, default to the first in the BarList
		--TODO: This logic may be unintuitive. Should probably be fixed
		if not Neuron.currentBar and #Neuron.bars then
			Neuron.Bar.ChangeSelectedBar(Neuron.bars[1])
		elseif Neuron.currentBar then
			BarEditor.activate(Neuron.currentBar.editFrame)
		end
	else
		Neuron.barEditMode = false
		for _, bar in pairs(Neuron.bars) do
			local overlay = bar.editFrame
			bar.editFrame = nil
			if overlay then
				BarEditor.free(overlay)
			end

			bar:UpdateObjectVisibility()
			bar:UpdateBarStatus()
			bar:UpdateObjectStatus()
		end
	end
end

function Neuron:ToggleButtonEditMode(show)
	local isActionBar = function(bar)
		return bar and bar.class == "ActionBar"
	end

	local isStatusBar = function(bar)
		return
			bar and (
				bar.class == "XPBar" or
				bar.class == "RepBar" or
				bar.class == "CastBar" or
				bar.class == "MirrorBar"
			)
	end

	local bars = Array.concatenate(
		Array.filter(isActionBar, Neuron.bars),
		Array.filter(isStatusBar, Neuron.bars)
	)

	if show then
		Neuron.buttonEditMode = true

		Neuron:ToggleBarEditMode(false)
		Neuron:ToggleBindingMode(false)

		local currentButton =
			Neuron.currentButton or
			(
				(isActionBar(Neuron.currentBar) or isStatusBar(Neuron.currentBar))
				and unpack(Neuron.currentBar.buttons)
			) or
			Array.foldl(
				function(button, bar) return button or unpack(bar.buttons) end,
				nil,
				bars
			)

		if not currentButton then
			Neuron.buttonEditMode = false
			return
		end

		for _, bar in pairs(bars) do
			for _, button in pairs(bar.buttons) do
				button.editFrame = button.editFrame or ButtonEditor.allocate(
					button,
					isActionBar(bar) and "corners" or "sides",
					function(btn)
						Neuron.Button.ChangeSelectedButton(btn)
						if addonTable.NeuronEditor then
							Neuron.NeuronGUI:RefreshEditor()
						end
					end
				)
			end

			bar:UpdateObjectVisibility(true)
			bar:UpdateBarStatus(true)
			bar:UpdateObjectStatus()
			bar:UpdateObjectUsability()
		end

		-- change the button, but also manually activate it
		-- just in case it was already the current button and
		-- so if the change is a noop, we still show the recticle
		Neuron.Button.ChangeSelectedButton(currentButton)
		ButtonEditor.activate(currentButton.editFrame)
	else
		Neuron.buttonEditMode = false

		for _, bar in pairs(bars) do
			for _, button in pairs(bar.buttons) do
				if button.editFrame then
					ButtonEditor.free(button.editFrame)
					button.editFrame = nil
				end
			end

			bar:UpdateObjectVisibility()
			bar:UpdateBarStatus()
			bar:UpdateObjectStatus()
			bar:UpdateObjectUsability()
		end
	end
end

--- Processes the change to a key bind
--- @param targetButton Button
--- @param key string @The key to be used
local function processKeyBinding(targetButton, key)
	--if the button is locked, warn the user as to the locked status
	if targetButton.keys and targetButton.keys.hotKeyLock then
		UIErrorsFrame:AddMessage(L["Bindings_Locked_Notice"], 1.0, 1.0, 1.0, 1.0, UIERRORS_HOLD_TIME)
		return
	end

	--if the key being pressed is escape, clear the bindings on the button
	if key == "ESCAPE" then
		ClearOverrideBindings(targetButton)
		targetButton.keys.hotKeys = ":"
		targetButton:ApplyBindings()

		--if the key is anything else, keybind the button to this key
	elseif key then --checks to see if another keybind already has that key, and if so clears it from the other button
		--check to see if any other button has this key bound to it, ignoring locked buttons, and if so remove the key from the other button
		for _, bar in pairs(Neuron.bars) do
			for _, button in pairs(bar.buttons) do
				if button.keys then
					if targetButton ~= button and not button.keys.hotKeyLock then
						button.keys.hotKeys:gsub("[^:]+", function(binding)
							if key == binding then
								local newkey = binding:gsub("%-", "%%-")
								button.keys.hotKeys = button.keys.hotKeys:gsub(newkey..":", "")
								button:ApplyBindings()
							end
						end)
					end
				end
			end
		end

		--search the current hotKeys to see if our new key is missing, and if so add it
		local found
		targetButton.keys.hotKeys:gsub("[^:]+", function(binding)
			if binding == key then
				found = true
			end
		end)

		if not found then
			targetButton.keys.hotKeys = targetButton.keys.hotKeys..key..":"
		end

		targetButton:ApplyBindings()
	end
end

function Neuron:ToggleBindingMode(show)
	local isBindable = function(bar)
		return bar and (
			bar.class == "ActionBar" or
			bar.class == "ExtraBar" or
			bar.class == "ZoneAbilityBar" or
			bar.class == "PetBar"
		)
	end

	local bars = Array.filter(isBindable, Neuron.bars)

	if show then
		Neuron.bindingMode = true
		Neuron:ToggleButtonEditMode(false)
		Neuron:ToggleBarEditMode(false)

		for _, bar in pairs(bars) do
			for _, button in pairs(bar.buttons) do
				button.keybindFrame = button.keybindFrame or ButtonBinder.allocate(button, processKeyBinding)
			end

			bar:UpdateObjectVisibility(true)
			bar:UpdateBarStatus(true)
			bar:UpdateObjectStatus()
			bar:UpdateObjectUsability()
		end

	else
		Neuron.bindingMode = false
		for _, bar in pairs(bars) do
			for _, button in pairs(bar.buttons) do
				if button.keybindFrame then
					ButtonBinder.free(button.keybindFrame)
					button.keybindFrame = nil
				end
			end
			bar:UpdateObjectVisibility()
			bar:UpdateBarStatus()
			bar:UpdateObjectStatus()
			bar:UpdateObjectUsability()
		end
	end
end

function Neuron:GetSerializedAndCompressedProfile()
	local uncompressed = Neuron:Serialize(Neuron.db.profile) --serialize the database into a string value
	local compressed = LibDeflate:CompressZlib(uncompressed) --compress the data
	local encoded = LibDeflate:EncodeForPrint(compressed) --encode the data for print for copy+paste
	return encoded
end

function Neuron:SetSerializedAndCompressedProfile(input)
	--check if the input is empty
	if input == "" then
		Neuron:Print(L["No data to import."].." "..L["Aborting."])
		return
	end

	--decode and check if decoding worked properly
	local decoded = LibDeflate:DecodeForPrint(input)
	if decoded == nil then
		Neuron:Print(L["Decoding failed."].." "..L["Aborting."])
		return
	end

	--uncompress and check if uncompresion worked properly
	local uncompressed = LibDeflate:DecompressZlib(decoded)
	if uncompressed == nil then
		Neuron:Print(L["Decompression failed."].." "..L["Aborting."])
		return
	end

	--deserialize the data and return it back into a table format
	local result, newProfile = Neuron:Deserialize(uncompressed)

	if result == true and newProfile then --if we successfully deserialize, load the new table and reload
		for k,v in pairs(newProfile) do
			if type(v) == "table" then
				Neuron.db.profile[k] = CopyTable(v)
			else
				Neuron.db.profile[k] = v
			end
		end
		ReloadUI()
	else
		Neuron:Print(L["Data import Failed."].." "..L["Aborting."])
	end
end