--	// FileName: WelcomeMessage.lua
--	// Written by: TheGamer101
--	// Description: Create a message label for a welcome message.

local clientChatModules = script.Parent.Parent
local ChatSettings = require(clientChatModules:WaitForChild("ChatSettings"))
local ChatConstants = require(clientChatModules:WaitForChild("ChatConstants"))
local util = require(script.Parent:WaitForChild("Util"))

function CreateWelcomeMessageLabel(messageData, channelName)
	local message = messageData.Message
	local extraData = messageData.ExtraData or {}
	local useFont = extraData.Font or ChatSettings.DefaultFont
	local useFontSize = extraData.FontSize or ChatSettings.ChatWindowTextSize
	local useChatColor = extraData.ChatColor or ChatSettings.DefaultMessageColor

	local BaseFrame, BaseMessage = util:CreateBaseMessage(message, useFont, useFontSize, useChatColor)

	local function GetHeightFunction()
		return util:GetMessageHeight(BaseMessage, BaseFrame)
	end

	local AnimParams = {}
	AnimParams.Text_TargetTransparency = 0
	AnimParams.Text_CurrentTransparency = 0
	AnimParams.Text_NormalizedExptValue = 1
	AnimParams.TextStroke_TargetTransparency = 0.75
	AnimParams.TextStroke_CurrentTransparency = 0.75
	AnimParams.TextStroke_NormalizedExptValue = 1

	local function FadeInFunction(duration, CurveUtil)
		AnimParams.Text_TargetTransparency = 0
		AnimParams.TextStroke_TargetTransparency = 0.75
		AnimParams.Text_NormalizedExptValue = CurveUtil:NormalizedDefaultExptValueInSeconds(duration)
		AnimParams.TextStroke_NormalizedExptValue = CurveUtil:NormalizedDefaultExptValueInSeconds(duration)
	end

	local function FadeOutFunction(duration, CurveUtil)
		AnimParams.Text_TargetTransparency = 1
		AnimParams.TextStroke_TargetTransparency = 1
		AnimParams.Text_NormalizedExptValue = CurveUtil:NormalizedDefaultExptValueInSeconds(duration)
		AnimParams.TextStroke_NormalizedExptValue = CurveUtil:NormalizedDefaultExptValueInSeconds(duration)
	end

	local function AnimGuiObjects()
		BaseMessage.TextTransparency = AnimParams.Text_CurrentTransparency
		BaseMessage.TextStrokeTransparency = AnimParams.TextStroke_CurrentTransparency
	end

	local function UpdateAnimFunction(dtScale, CurveUtil)
		AnimParams.Text_CurrentTransparency = CurveUtil:Expt(
				AnimParams.Text_CurrentTransparency,
				AnimParams.Text_TargetTransparency,
				AnimParams.Text_NormalizedExptValue,
				dtScale
		)
		AnimParams.TextStroke_CurrentTransparency = CurveUtil:Expt(
				AnimParams.TextStroke_CurrentTransparency,
				AnimParams.TextStroke_TargetTransparency,
				AnimParams.TextStroke_NormalizedExptValue,
				dtScale
		)

		AnimGuiObjects()
	end

	return {
		[util.KEY_BASE_FRAME] = BaseFrame,
		[util.KEY_UPDATE_TEXT_FUNC] = nil,
		[util.KEY_GET_HEIGHT] = GetHeightFunction,
		[util.KEY_FADE_IN] = FadeInFunction,
		[util.KEY_FADE_OUT] = FadeOutFunction,
		[util.KEY_UPDATE_ANIMATION] = UpdateAnimFunction
	}
end

return {
	[util.KEY_MESSAGE_TYPE] = ChatConstants.MessageTypeWelcome,
	[util.KEY_CREATOR_FUNCTION] = CreateWelcomeMessageLabel
}
