local E, L = unpack(ElvUI)
local DT = E:GetModule("DataTexts")

--Variables
local _G = _G
local ipairs, tinsert, tremove = ipairs, tinsert, tremove
local format, next, strjoin = format, next, strjoin

local EasyMenu = EasyMenu
local GetLootSpecialization = GetLootSpecialization
local GetNumSpecializations = GetNumSpecializations
local GetPvpTalentInfoByID = GetPvpTalentInfoByID
local GetSpecialization = GetSpecialization
local GetSpecializationInfo = GetSpecializationInfo
local IsControlKeyDown = IsControlKeyDown
local IsShiftKeyDown = IsShiftKeyDown
local LoadAddOn = LoadAddOn
local SetLootSpecialization = SetLootSpecialization
local SetSpecialization = SetSpecialization
local ToggleTalentFrame = ToggleTalentFrame

local C_SpecializationInfo_GetAllSelectedPvpTalentIDs = C_SpecializationInfo.GetAllSelectedPvpTalentIDs
local C_Traits_GetConfigInfo = C_Traits.GetConfigInfo

local GetHasStarterBuild = C_ClassTalents.GetHasStarterBuild
local GetStarterBuildActive = C_ClassTalents.GetStarterBuildActive
local GetConfigIDsBySpecID = C_ClassTalents.GetConfigIDsBySpecID
local GetLastSelectedSavedConfigID = C_ClassTalents.GetLastSelectedSavedConfigID
local CanUseClassTalents = PlayerUtil.CanUseClassTalents

local UNKNOWN = UNKNOWN
local PVP_TALENTS = PVP_TALENTS
local BLUE_FONT_COLOR = BLUE_FONT_COLOR
local SELECT_LOOT_SPECIALIZATION = SELECT_LOOT_SPECIALIZATION
local LOOT_SPECIALIZATION_DEFAULT = LOOT_SPECIALIZATION_DEFAULT
local STARTER_ID = Constants.TraitConsts.STARTER_BUILD_TRAIT_CONFIG_ID

local activeString = strjoin("", "|cff00FF00", _G.ACTIVE_PETS, "|r")
local inactiveString = strjoin("", "|cffFF0000", _G.FACTION_INACTIVE, "|r")

local menuList = {
	{ text = SELECT_LOOT_SPECIALIZATION, isTitle = true, notCheckable = true },
	{
		checked = function()
			return GetLootSpecialization() == 0
		end,
		func = function()
			SetLootSpecialization(0)
		end,
	},
}

local specList = { { text = _G.SPECIALIZATION, isTitle = true, notCheckable = true } }
local loadoutList = { { text = L["Loadouts"], isTitle = true, notCheckable = true } }

local DEFAULT_TEXT = E:RGBToHex(0.9, 0.9, 0.9, nil, _G.TALENT_FRAME_DROP_DOWN_DEFAULT)
local STARTER_TEXT = E:RGBToHex(BLUE_FONT_COLOR.r, BLUE_FONT_COLOR.g, BLUE_FONT_COLOR.b, nil, _G.TALENT_FRAME_DROP_DOWN_STARTER_BUILD)

local listIcon = "|T%s:16:16:0:0:50:50:4:46:4:46|t"
local specText = "|T%s:14:14:0:0:64:64:4:60:4:60|t  %s"

local active = nil

local Config = {
	name = "mMT_Dock_Talent",
	localizedName = mMT.DockString .. " " .. TALENTS_BUTTON,
	category = "mMT-" .. mMT.DockString,
	text = {
		enable = true,
		center = false,
		a = true, -- first label
		b = false, -- second label
	},
	icon = {
		notification = false,
		texture = mMT.IconSquare,
		color = { r = 1, g = 1, b = 1, a = 1 },
	},
}

local function starter_checked()
	return GetStarterBuildActive()
end

local function loadout_checked(data)
	return data and data.arg1 == DT.ClassTalentsID
end

local loadout_func
do
	local loadoutID
	local function loadout_callback(_, configID)
		return configID == loadoutID
	end

	loadout_func = function(_, arg1)
		if not _G.ClassTalentFrame then
			_G.ClassTalentFrame_LoadUI()
		end

		loadoutID = arg1

		_G.ClassTalentFrame.TalentsTab:LoadConfigByPredicate(loadout_callback)
	end
end

local function menu_checked(data)
	return data and data.arg1 == GetLootSpecialization()
end
local function menu_func(_, arg1)
	SetLootSpecialization(arg1)
end

local function spec_checked(data)
	return data and data.arg1 == GetSpecialization()
end
local function spec_func(_, arg1)
	SetSpecialization(arg1)
end

local function AddTexture(texture)
	return texture and format(listIcon, texture) or ""
end
local function OnEnter(self)
	if E.db.mMT.dockdatatext.tip.enable then
		DT.tooltip:ClearLines()

		for i, info in ipairs(DT.SPECIALIZATION_CACHE) do
			DT.tooltip:AddLine(strjoin(" ", format(mMT.ClassColor.string, info.name), AddTexture(info.icon), (i == active and activeString or inactiveString)), 1, 1, 1)
		end

		DT.tooltip:AddLine(" ")

		local specialization = GetLootSpecialization()
		local sameSpec = specialization == 0 and GetSpecialization()
		local specIndex = DT.SPECIALIZATION_CACHE[sameSpec or specialization]
		if specIndex and specIndex.name then
			DT.tooltip:AddLine(format("|cffFFFFFF%s:|r %s", SELECT_LOOT_SPECIALIZATION, sameSpec and format(LOOT_SPECIALIZATION_DEFAULT, specIndex.name) or specIndex.name))
		end

		DT.tooltip:AddLine(" ")
		DT.tooltip:AddLine(L["Talent Builds"], 0.69, 0.31, 0.31)

		for index, loadout in next, loadoutList do
			if index > 1 then
				local text = loadout:checked() and activeString or inactiveString
				DT.tooltip:AddLine(strjoin(" - ", loadout.text, text), 1, 1, 1)
			end
		end

		local pvpTalents = C_SpecializationInfo_GetAllSelectedPvpTalentIDs()
		if next(pvpTalents) then
			DT.tooltip:AddLine(" ")
			DT.tooltip:AddLine(PVP_TALENTS, 0.69, 0.31, 0.31)

			for i, talentID in next, pvpTalents do
				if i > 4 then
					break
				end

				local _, name, icon, _, _, _, unlocked = GetPvpTalentInfoByID(talentID)
				if name and unlocked then
					DT.tooltip:AddLine(AddTexture(icon) .. " " .. name)
				end
			end
		end

		DT.tooltip:AddLine(" ")
		DT.tooltip:AddLine(L["|cffFFFFFFLeft Click:|r Change Talent Specialization"])
		DT.tooltip:AddLine(L["|cffFFFFFFControl + Left Click:|r Change Loadout"])
		DT.tooltip:AddLine(L["|cffFFFFFFShift + Left Click:|r Show Talent Specialization UI"])
		DT.tooltip:AddLine(L["|cffFFFFFFRight Click:|r Change Loot Specialization"])
		DT.tooltip:Show()
	end

	mMT:Dock_OnEnter(self, Config)
end

local function OnEvent(self, event, loadoutID)
	if event == "ELVUI_FORCE_UPDATE" then
		--setup settings
		Config.text.enable = E.db.mMT.dockdatatext.talent.showrole
		Config.text.a = E.db.mMT.dockdatatext.talent.showrole
		Config.icon.texture = mMT.Media.DockIcons[E.db.mMT.dockdatatext.talent.icon]
		Config.icon.color = E.db.mMT.dockdatatext.talent.customcolor and E.db.mMT.dockdatatext.talent.iconcolor or nil

		mMT:InitializeDockIcon(self, Config, event)
	end

	if E.db.mMT.roleicons.enable then
		TANK_ICON = E:TextureString(mMT.Media.Role[E.db.mMT.roleicons.tank], ":14:14")
		HEALER_ICON = E:TextureString(mMT.Media.Role[E.db.mMT.roleicons.heal], ":14:14")
		DPS_ICON = E:TextureString(mMT.Media.Role[E.db.mMT.roleicons.dd], ":14:14")
	end

	if #menuList == 2 then
		for index = 1, GetNumSpecializations() do
			local id, name, _, icon = GetSpecializationInfo(index)
			if id then
				menuList[index + 2] = { arg1 = id, text = name, checked = menu_checked, func = menu_func }
				specList[index + 1] = { arg1 = index, text = format(specText, icon, name), checked = spec_checked, func = spec_func }
			end
		end
	end

	local specIndex = GetSpecialization()
	local info = DT.SPECIALIZATION_CACHE[specIndex]
	local ID = info and info.id

	if not ID then
		self.text:SetText(DEFAULT_TEXT)
		return
	end

	if (event == "CONFIG_COMMIT_FAILED" or event == "ELVUI_FORCE_UPDATE" or event == "TRAIT_CONFIG_DELETED" or event == "TRAIT_CONFIG_UPDATED") and CanUseClassTalents() then
		if not DT.ClassTalentsID then
			DT.ClassTalentsID = (GetHasStarterBuild() and GetStarterBuildActive() and STARTER_ID) or GetLastSelectedSavedConfigID(ID)
		end

		local builds = GetConfigIDsBySpecID(ID)
		if builds and GetHasStarterBuild() then
			tinsert(builds, STARTER_ID)
		end

		if event == "TRAIT_CONFIG_DELETED" then
			for index = #loadoutList, 2, -1 do -- reverse loop to remove the deleted config from the loadout list
				local loadout = loadoutList[index]
				if loadout and loadout.arg1 == loadoutID then
					tremove(loadoutList, index)
				end
			end
		end

		for index, configID in next, builds do
			if configID == STARTER_ID then
				loadoutList[index + 1] = { text = STARTER_TEXT, checked = starter_checked, func = loadout_func, arg1 = STARTER_ID }
			else
				local configInfo = C_Traits_GetConfigInfo(configID)
				loadoutList[index + 1] = { text = configInfo and configInfo.name or UNKNOWN, checked = loadout_checked, func = loadout_func, arg1 = configID }
			end
		end
	end

	active = specIndex

	local text = nil
	if E.db.mMT.dockdatatext.talent.showrole then
		if IsInGroup() then
			local Role = UnitGroupRolesAssigned("player")

			if Role == "TANK" then
				text = TANK_ICON
			elseif Role == "HEALER" then
				text = HEALER_ICON
			else
				text = DPS_ICON
			end
			self.mMT_Dock.TextA:SetText(text)
		end
	else
		self.mMT_Dock.TextA:SetText("")
	end
end

local function OnLeave(self)
	if E.db.mMT.dockdatatext.tip.enable then
		DT.tooltip:Hide()
	end

	mMT:Dock_OnLeave(self, Config)
end

local function OnClick(self, button)
	if mMT:CheckCombatLockdown() then
		mMT:Dock_Click(self, Config)
		local specIndex = GetSpecialization()
		if not specIndex then
			return
		end

		local menu
		if button == "LeftButton" then
			if not _G.ClassTalentFrame then
				LoadAddOn("Blizzard_ClassTalentUI")
			end

			if IsShiftKeyDown() then
				ToggleTalentFrame(_G.TalentMicroButton.suggestedTab)
			else
				menu = IsControlKeyDown() and loadoutList or specList
			end
		else
			local _, specName = GetSpecializationInfo(specIndex)
			if specName then
				menuList[2].text = format(LOOT_SPECIALIZATION_DEFAULT, specName)

				menu = menuList
			end
		end

		if menu then
			E:SetEasyMenuAnchor(E.EasyMenu, self)
			EasyMenu(menu, E.EasyMenu, nil, nil, nil, "MENU")
		end
	end
end

DT:RegisterDatatext(Config.name, Config.category, { "PLAYER_TALENT_UPDATE", "ACTIVE_TALENT_GROUP_CHANGED", "PLAYER_LOOT_SPEC_UPDATED", "TRAIT_CONFIG_DELETED", "TRAIT_CONFIG_UPDATED", "GROUP_ROSTER_UPDATE" }, OnEvent, nil, OnClick, OnEnter, OnLeave, Config.localizedName, nil, nil)
