--@curseforge-project-slug: libchatanims@
local MAJOR, MINOR = "LibChatAnims", 4 -- Bump minor on changes
local LCA = LibStub:NewLibrary(MAJOR, MINOR)
if not LCA then return end -- No upgrade needed

LCA.animations = LCA.animations or {} -- Animation storage
LCA.alerting = LCA.alerting or {} -- Chat tab alerting storage
local anims = LCA.animations
local alerting = LCA.alerting

function LCA:IsAlerting(tab)
	if alerting[tab] then
		return true
	end
end

----------------------------------------------------
-- Note, most of this code is simply replicated from
-- Blizzard's FloatingChatFrame.lua file.
-- The only real changes are the creation and use
-- of animations vs the use of UIFrameFlash.
--

--FCFDockOverflowButton_UpdatePulseState = function(self)
--	local dock = self:GetParent()
--	local shouldPulse = false
--	for _, chatFrame in pairs(FCFDock_GetChatFrames(dock)) do
--		local chatTab = _G[chatFrame:GetName().."Tab"]
--		if ( not chatFrame.isStaticDocked and chatTab.alerting) then
--			-- Make sure the rects are valid. (Not always the case when resizing the WoW client
--			if ( not chatTab:GetRight() or not dock.scrollFrame:GetRight() ) then
--				return false
--			end
--			-- Check if it's off the screen.
--			local DELTA = 3 -- Chosen through experimentation
--			if ( chatTab:GetRight() < (dock.scrollFrame:GetLeft() + DELTA) or chatTab:GetLeft() > (dock.scrollFrame:GetRight() - DELTA) ) then
--				shouldPulse = true
--				break
--			end
--		end
--	end
--
--	local tex = self:GetHighlightTexture()
--	if shouldPulse then
--		if not anims[tex] then
--			anims[tex] = tex:CreateAnimationGroup()
--
--			local fade1 = anims[tex]:CreateAnimation("Alpha")
--			fade1:SetDuration(1)
--			fade1:SetFromAlpha(0)
--			fade1:SetToAlpha(1)
--			fade1:SetOrder(1)
--
--			local fade2 = anims[tex]:CreateAnimation("Alpha")
--			fade2:SetDuration(1)
--			fade2:SetFromAlpha(1)
--			fade2:SetToAlpha(0)
--			fade2:SetOrder(2)
--		end
--		tex:Show()
--		tex:SetAlpha(0)
--		anims[tex]:SetLooping("REPEAT")
--		anims[tex]:Play()
--
--		self:LockHighlight()
--		self.alerting = true
--	else
--		if anims[tex] then
--			anims[tex]:Stop()
--		end
--		self:UnlockHighlight()
--		tex:SetAlpha(1)
--		tex:Show()
--		self.alerting = false
--	end
--
--	if self.list:IsShown() then
--		FCFDockOverflowList_Update(self.list, dock)
--	end
--	return true
--end

--FCFDockOverflowListButton_SetValue = function(button, chatFrame)
--	local chatTab = _G[chatFrame:GetName().."Tab"]
--	button.chatFrame = chatFrame
--	button:SetText(chatFrame.name)
--
--	local colorTable = chatTab.selectedColorTable or DEFAULT_TAB_SELECTED_COLOR_TABLE
--
--	if chatTab.selectedColorTable then
--		button:GetFontString():SetTextColor(colorTable.r, colorTable.g, colorTable.b)
--	else
--		button:GetFontString():SetTextColor(NORMAL_FONT_COLOR.r, NORMAL_FONT_COLOR.g, NORMAL_FONT_COLOR.b)
--	end
--
--	button.glow:SetVertexColor(colorTable.r, colorTable.g, colorTable.b)
--
--	if chatTab.conversationIcon then
--		button.conversationIcon:SetVertexColor(colorTable.r, colorTable.g, colorTable.b)
--		button.conversationIcon:Show()
--	else
--		button.conversationIcon:Hide()
--	end
--
--	if chatTab.alerting then
--		button.alerting = true
--		if not anims[button.glow] then
--			anims[button.glow] = button.glow:CreateAnimationGroup()
--
--			local fade1 = anims[button.glow]:CreateAnimation("Alpha")
--			fade1:SetDuration(1)
--			fade1:SetFromAlpha(0)
--			fade1:SetToAlpha(1)
--			fade1:SetOrder(1)
--
--			local fade2 = anims[button.glow]:CreateAnimation("Alpha")
--			fade2:SetDuration(1)
--			fade2:SetFromAlpha(1)
--			fade2:SetToAlpha(0)
--			fade2:SetOrder(2)
--		end
--		button.glow:Show()
--		button.glow:SetAlpha(0)
--		anims[button.glow]:SetLooping("REPEAT")
--		anims[button.glow]:Play()
--	else
--		button.alerting = false
--		if anims[button.glow] then
--			anims[button.glow]:Stop()
--		end
--		button.glow:Hide()
--	end
--	button:Show()
--end

FCF_StartAlertFlash = function(chatFrame)
	local chatTab = _G[chatFrame:GetName().."Tab"]

	if chatFrame.minFrame then
		if not anims[chatFrame.minFrame] then
			anims[chatFrame.minFrame] = chatFrame.minFrame.glow:CreateAnimationGroup()

			local fade1 = anims[chatFrame.minFrame]:CreateAnimation("Alpha")
			fade1:SetDuration(1)
			fade1:SetFromAlpha(0)
			fade1:SetToAlpha(1)
			fade1:SetOrder(1)

			local fade2 = anims[chatFrame.minFrame]:CreateAnimation("Alpha")
			fade2:SetDuration(1)
			fade2:SetFromAlpha(1)
			fade2:SetToAlpha(0)
			fade2:SetOrder(2)
		end
		chatFrame.minFrame.glow:Show()
		chatFrame.minFrame.glow:SetAlpha(0)
		anims[chatFrame.minFrame]:SetLooping("REPEAT")
		anims[chatFrame.minFrame]:Play()
		--chatFrame.minFrame.alerting = true
		alerting[chatFrame.minFrame] = true
	end

	if not anims[chatTab.glow] then
		anims[chatTab.glow] = chatTab.glow:CreateAnimationGroup()

		local fade1 = anims[chatTab.glow]:CreateAnimation("Alpha")
		fade1:SetDuration(1)
		fade1:SetFromAlpha(0)
		fade1:SetToAlpha(1)
		fade1:SetOrder(1)

		local fade2 = anims[chatTab.glow]:CreateAnimation("Alpha")
		fade2:SetDuration(1)
		fade2:SetFromAlpha(1)
		fade2:SetToAlpha(0)
		fade2:SetOrder(2)
	end
	chatTab.glow:Show()
	chatTab.glow:SetAlpha(0)
	anims[chatTab.glow]:SetLooping("REPEAT")
	anims[chatTab.glow]:Play()
	--chatTab.alerting = true
	alerting[chatTab] = true


	-- START function FCFTab_UpdateAlpha(chatFrame)
	local mouseOverAlpha, noMouseAlpha = 0, 0
	if not chatFrame.isDocked or chatFrame == FCFDock_GetSelectedWindow(GENERAL_CHAT_DOCK) then
		mouseOverAlpha = 1.0 --CHAT_FRAME_TAB_SELECTED_MOUSEOVER_ALPHA
		noMouseAlpha = 0.4 -- CHAT_FRAME_TAB_SELECTED_NOMOUSE_ALPHA
	else
		mouseOverAlpha = 1.0 -- CHAT_FRAME_TAB_ALERTING_MOUSEOVER_ALPHA
		noMouseAlpha = 1.0 -- CHAT_FRAME_TAB_ALERTING_NOMOUSE_ALPHA
	end
	if chatFrame.hasBeenFaded then
		chatTab:SetAlpha(mouseOverAlpha)
	else
		chatTab:SetAlpha(noMouseAlpha)
	end
	--END function FCFTab_UpdateAlpha(chatFrame)

	--FCFDockOverflowButton_UpdatePulseState(GENERAL_CHAT_DOCK.overflowButton)
end

FCF_StopAlertFlash = function(chatFrame)
	local chatTab = _G[chatFrame:GetName().."Tab"]

	if chatFrame.minFrame then
		if anims[chatFrame.minFrame] then
			anims[chatFrame.minFrame]:Stop()
		end
		chatFrame.minFrame.glow:Hide()
		--chatFrame.minFrame.alerting = false
		alerting[chatFrame.minFrame] = nil
	end

	if anims[chatTab.glow] then
		anims[chatTab.glow]:Stop()
	end
	chatTab.glow:Hide()
	--chatTab.alerting = false
	alerting[chatTab] = nil

	-- START function FCFTab_UpdateAlpha(chatFrame)
	local mouseOverAlpha, noMouseAlpha = 0, 0
	if not chatFrame.isDocked or chatFrame == FCFDock_GetSelectedWindow(GENERAL_CHAT_DOCK) then
		mouseOverAlpha = 1.0 --CHAT_FRAME_TAB_SELECTED_MOUSEOVER_ALPHA
		noMouseAlpha = 0.4 -- CHAT_FRAME_TAB_SELECTED_NOMOUSE_ALPHA
	else
		mouseOverAlpha = 0.6 --CHAT_FRAME_TAB_NORMAL_MOUSEOVER_ALPHA
		noMouseAlpha = 0.2 --CHAT_FRAME_TAB_NORMAL_NOMOUSE_ALPHA
	end
	if chatFrame.hasBeenFaded then
		chatTab:SetAlpha(mouseOverAlpha)
	else
		chatTab:SetAlpha(noMouseAlpha)
	end
	--END function FCFTab_UpdateAlpha(chatFrame)

	--FCFDockOverflowButton_UpdatePulseState(GENERAL_CHAT_DOCK.overflowButton)
end