-- More information about this indicator can be found at:
-- https://fxcodebase.com/code/viewtopic.php?f=31&t=74046

--+------------------------------------------------------------------------------------------------+
--|                                                            Copyright © 2023, Gehtsoft USA LLC  | 
--|                                                                         http://fxcodebase.com  |
--+------------------------------------------------------------------------------------------------+
--|                                                                   Developed by : Mario Jemic   |                    
--|                                                                       mario.jemic@gmail.com    |
--|                                                        https://AppliedMachineLearning.systems  |
--|                                                                       https://mario-jemic.com/ |
--+------------------------------------------------------------------------------------------------+

--+------------------------------------------------------------------------------------------------+
--|                                           Our work would not be possible without your support. |
--+------------------------------------------------------------------------------------------------+
--|                                                               Paypal: https://goo.gl/9Rj74e    |
--|                                                             Patreon :  https://goo.gl/GdXWeN   |  
--+------------------------------------------------------------------------------------------------+


-- Indicator profile initialization routine
-- Defines indicator profile properties and indicator parameters
-- TODO: Add minimal and maximal value of numeric parameters and default color of the streams

function Init()
	indicator:name("Heikin-Ashi Alert")
	indicator:description("")
	indicator:requiredSource(core.Bar)
	indicator:type(core.Indicator)

	indicator.parameters:addGroup("Alert Parameters")
	indicator.parameters:addString("Live", "Execution", "", "End of Turn")
	indicator.parameters:addStringAlternative("Live", "End of Turn", "", "End of Turn")
	indicator.parameters:addStringAlternative("Live", "Live", "", "Live")

	indicator.parameters:addInteger("ToTime", "Convert the date to", "", 6)
	indicator.parameters:addIntegerAlternative("ToTime", "EST", "", 1)
	indicator.parameters:addIntegerAlternative("ToTime", "UTC", "", 2)
	indicator.parameters:addIntegerAlternative("ToTime", "Local", "", 3)
	indicator.parameters:addIntegerAlternative("ToTime", "Server", "", 4)
	indicator.parameters:addIntegerAlternative("ToTime", "Financial", "", 5)
	indicator.parameters:addIntegerAlternative("ToTime", "Display", "", 6)

	indicator.parameters:addBoolean("Show", "Show Dialog box Alert", "", true)
	indicator.parameters:addBoolean("OnlyOnce", "Alert Once", "Subsequent Alert will be ignored.", false)
	indicator.parameters:addBoolean("ShowAlert", "Show Alert", "", true)

	indicator.parameters:addGroup("Alert Style")
	indicator.parameters:addColor("UpTrendColor", "Up Trend Color", "", core.rgb(0, 0, 255))
	indicator.parameters:addColor("DownTrendColor", "Down Trend Color", "", core.rgb(0, 0, 255))
	indicator.parameters:addInteger("Size", "Label Size", "", 10, 1, 100)

	indicator.parameters:addGroup("Alerts Sound")
	indicator.parameters:addBoolean("PlaySound", "Play Sound", "", false)
	indicator.parameters:addBoolean("RecurrentSound", "Recurrent Sound", "", false)

	indicator.parameters:addGroup("Alerts Email")
	indicator.parameters:addBoolean("SendEmail", "Send Email", "", false)
	indicator.parameters:addString("Email", "Email", "", "")
	indicator.parameters:setFlag("Email", core.FLAG_EMAIL)

	Parameters(1, "HA Trend Change", false)
	Parameters(2, "HA Trend Change (without wicks)", false)
	Parameters(3, "HA Trend Change (without wicks) First only", true)

	indicator.parameters:addBoolean("in_strategy", "Works in strategy", "For strategy use only. Do not change manually", false);
end

function Parameters(id, Label, Flag)
	indicator.parameters:addGroup(Label .. " Alert")

	indicator.parameters:addBoolean("ON" .. id, "Show " .. Label .. " Alert", "", Flag)

	indicator.parameters:addFile("Up" .. id, Label .. " Cross Over Sound", "", "")
	indicator.parameters:setFlag("Up" .. id, core.FLAG_SOUND)

	indicator.parameters:addFile("Down" .. id, Label .. " Cross Under Sound", "", "")
	indicator.parameters:setFlag("Down" .. id, core.FLAG_SOUND)

	indicator.parameters:addString("Label" .. id, "Label", "", Label)
end

local Number = 3
local Up = {}
local Down = {}
local Label = {}
local ON = {}
local Size
local Email
local SendEmail
local RecurrentSound, SoundFile
local Show
local Alert
local PlaySound
local Live
local FIRST = true
local OnlyOnce
local U = {}
local D = {}
local UpTrendColor, DownTrendColor
local OnlyOnceFlag
local ShowAlert
local Alert = {}
local AlertLevel = {}
local ToTime
local Shift = 0

local first
local source = nil
local HA
local Trend

-- Routine
function Prepare(nameOnly)
	local name = profile:id() .. "(" .. instance.source:name() .. ")"
	instance:name(name)

	if (nameOnly) then
		return
	end

	ToTime = instance.parameters.ToTime

	if ToTime == 1 then
		ToTime = core.TZ_EST
	elseif ToTime == 2 then
		ToTime = core.TZ_UTC
	elseif ToTime == 3 then
		ToTime = core.TZ_LOCAL
	elseif ToTime == 4 then
		ToTime = core.TZ_SERVER
	elseif ToTime == 5 then
		ToTime = core.TZ_FINANCIAL
	elseif ToTime == 6 then
		ToTime = core.TZ_TS
	end

	OnlyOnceFlag = true
	FIRST = true
	OnlyOnce = instance.parameters.OnlyOnce
	ShowAlert = instance.parameters.ShowAlert
	Show = instance.parameters.Show
	Live = instance.parameters.Live
	UpTrendColor = instance.parameters.UpTrendColor
	DownTrendColor = instance.parameters.DownTrendColor
	Size = instance.parameters.Size

	source = instance.source

	-- Create short and long EMAs for the source
	HA = core.indicators:create("HA", source)
	Trend = instance:addInternalStream(0, 0)
	first = HA.DATA:first()

	for i = 1, Number, 1 do
		if not instance.parameters.in_strategy then
			Alert[i] = instance:addInternalStream(0, 0)
		else
			Alert[i] = instance:addStream("Alert" .. i, core.Line, "Alert", "Alert", core.colors().Red, 0, 0)
		end
		AlertLevel[i] = instance:addInternalStream(0, 0)
	end

	Initialization()
	instance:ownerDrawn(true)
end

local init = false

function Draw(stage, context)
	if stage ~= 2 then
		return
	end

	if not init then
		context:createFont(1, "Wingdings", context:pointsToPixels(Size), context:pointsToPixels(Size), 0)
		init = true
	end

	for period = math.max(context:firstBar(), source:first()), math.min(context:lastBar(), source:size() - 1), 1 do
		x, x1, x2 = context:positionOfBar(period)

		for Level = 1, Number, 1 do
			if Alert[Level]:hasData(period) then
				if Alert[Level][period] == 1 then
					visible, y = context:pointOfPrice(AlertLevel[Level][period])

					width, height = context:measureText(1, "\225", 0)
					context:drawText(1, "\225", UpTrendColor, -1, x - width / 2, y, x + width / 2, y + height, 0)
				elseif Alert[Level][period] == -1 then
					visible, y = context:pointOfPrice(AlertLevel[Level][period])
					width, height = context:measureText(1, "\226", 0)
					context:drawText(1, "\226", DownTrendColor, -1, x - width / 2, y - height, x + width / 2, y, 0)
				end
			end
		end
	end
end

function Initialization()
	SendEmail = instance.parameters.SendEmail

	local i
	for i = 1, Number, 1 do
		Label[i] = instance.parameters:getString("Label" .. i)
		ON[i] = instance.parameters:getBoolean("ON" .. i)
	end

	if SendEmail then
		Email = instance.parameters.Email
	else
		Email = nil
	end

	assert(not (SendEmail and (Email == "" or Email == nil)), "E-mail address must be specified")

	PlaySound = instance.parameters.PlaySound
	if PlaySound then
		for i = 1, Number, 1 do
			Up[i] = instance.parameters:getString("Up" .. i)
			Down[i] = instance.parameters:getString("Down" .. i)
		end
	else
		for i = 1, Number, 1 do
			Up[i] = nil
			Down[i] = nil
		end
	end

	for i = 1, Number, 1 do
		assert(not (PlaySound and (Up[i] == "" or Up[i] == nil)), "Sound file must be chosen")
		assert(not (PlaySoundand and (Down[i] == "" or Down[i] == nil)), "Sound file must be chosen")
	end

	RecurrentSound = instance.parameters.RecurrentSound

	for i = 1, Number, 1 do
		U[i] = nil
		D[i] = nil
	end
end

function Calculate(period, mode)
	HA:update(mode)

	if period < first then
		return
	end
end

-- Indicator calculation routine
-- TODO: Add your code for calculation output values
function Update(period, mode)
	Calculate(period, mode)

	if Live ~= "Live" then
		period = period - 1
		Shift = 1
	else
		Shift = 0
	end

	if period < first then
		return
	end

	Activate(1, period)
	Activate(2, period)
	Activate(3, period)
end

function Activate(id, period)
	Alert[id][period] = 0

	-- "HA Trend Change"
	--"HA Trend Change (without wicks)"
	--"HA Trend Change (without wicks) First only"

	if id == 1 and ON[id] then
		if HA.close[period] > HA.open[period] and HA.close[period - 1] <= HA.open[period - 1] then
			Alert[id][period] = 1
			AlertLevel[id][period] = HA.low[period]

			D[id] = nil

			if
				U[id] ~= source:serial(period) and period == source:size() - 1 - Shift and not FIRST and
					(not OnlyOnce or (OnlyOnce and OnlyOnceFlag ~= false))
			 then
				U[id] = source:serial(period)
				SoundAlert(Up[id])
				EmailAlert(Label[id], " Up Trend ")
				SendAlert(Label[id], " Up Trend ")
				Pop(Label[id], " Up Trend ", period)
				OnlyOnceFlag = false
			end
		elseif HA.close[period] < HA.open[period] and HA.close[period - 1] >= HA.open[period - 1] then
			Alert[id][period] = -1
			AlertLevel[id][period] = HA.high[period]

			U[id] = nil

			if
				D[id] ~= source:serial(period) and period == source:size() - 1 - Shift and not FIRST and
					(not OnlyOnce or (OnlyOnce and OnlyOnceFlag ~= false))
			 then
				D[id] = source:serial(period)
				SoundAlert(Down[id])
				EmailAlert(Label[id], " Down Trend ")
				Pop(Label[id], " Down Trend ", period)
				SendAlert(Label[id], " Down Trend ")
				OnlyOnceFlag = false
			end
		end
	end

	if id == 2 and ON[id] then
		if HA.close[period] > HA.open[period] and HA.open[period] == HA.low[period] then
			Alert[id][period] = 1
			AlertLevel[id][period] = HA.low[period]

			D[id] = nil

			if
				U[id] ~= source:serial(period) and period == source:size() - 1 - Shift and not FIRST and
					(not OnlyOnce or (OnlyOnce and OnlyOnceFlag ~= false))
			 then
				U[id] = source:serial(period)
				SoundAlert(Up[id])
				EmailAlert(Label[id], " Up Trend ")
				SendAlert(Label[id], " Up Trend ")
				Pop(Label[id], " Up Trend ", period)
				OnlyOnceFlag = false
			end
		elseif HA.close[period] < HA.open[period] and HA.open[period] == HA.high[period] then
			Alert[id][period] = -1
			AlertLevel[id][period] = HA.high[period]

			U[id] = nil

			if
				D[id] ~= source:serial(period) and period == source:size() - 1 - Shift and not FIRST and
					(not OnlyOnce or (OnlyOnce and OnlyOnceFlag ~= false))
			 then
				D[id] = source:serial(period)
				SoundAlert(Down[id])
				EmailAlert(Label[id], " Down Trend ")
				Pop(Label[id], " Down Trend ", period)
				SendAlert(Label[id], " Down Trend ")
				OnlyOnceFlag = false
			end
		end
	end

	Trend[period] = Trend[period - 1]

	if id == 3 and ON[id] then
		if HA.close[period] > HA.open[period] then
			if HA.close[period - 1] < HA.open[period - 1] then
				Trend[period] = 0
			end

			if HA.open[period] == HA.low[period] and Trend[period] ~= 1 then
				Alert[id][period] = 1
				AlertLevel[id][period] = HA.low[period]
				Trend[period] = 1

				D[id] = nil

				if
					U[id] ~= source:serial(period) and period == source:size() - 1 - Shift and not FIRST and
						(not OnlyOnce or (OnlyOnce and OnlyOnceFlag ~= false))
				 then
					U[id] = source:serial(period)
					SoundAlert(Up[id])
					EmailAlert(Label[id], " Up Trend ")
					SendAlert(Label[id], " Up Trend ")
					Pop(Label[id], " Up Trend ", period)
					OnlyOnceFlag = false
				end
			end
		elseif HA.close[period] < HA.open[period] then
			if HA.close[period - 1] > HA.open[period - 1] then
				Trend[period] = 0
			end

			if HA.open[period] == HA.high[period] and Trend[period] ~= -1 then
				Alert[id][period] = -1
				AlertLevel[id][period] = HA.high[period]
				Trend[period] = -1
				U[id] = nil

				if
					D[id] ~= source:serial(period) and period == source:size() - 1 - Shift and not FIRST and
						(not OnlyOnce or (OnlyOnce and OnlyOnceFlag ~= false))
				 then
					D[id] = source:serial(period)
					SoundAlert(Down[id])
					EmailAlert(Label[id], " Down Trend ")
					Pop(Label[id], " Down Trend ", period)
					SendAlert(Label[id], " Down Trend ")
					OnlyOnceFlag = false
				end
			end
		end
	end

	if FIRST then
		FIRST = false
	end
end

function AsyncOperationFinished(cookie, success, message)
end

function SoundAlert(Sound)
	if not PlaySound then
		return
	end

	terminal:alertSound(Sound, RecurrentSound)
end

function EmailAlert(label, Subject)
	if not SendEmail then
		return
	end

	local now = core.host:execute("getServerTime")
	now = core.host:execute("convertTime", core.TZ_EST, ToTime, now)
	local DATA = core.dateToTable(now)

	local delim = "\013\010"
	local Note = profile:id() .. delim .. " Label : " .. label .. delim .. " Alert : " .. Subject
	local Symbol = "Instrument : " .. source:instrument()
	local Time =
		" Date : " .. DATA.month .. " / " .. DATA.day .. " Time:  " .. DATA.hour .. " / " .. DATA.min .. " / " .. DATA.sec

	local TF = "Time Frame : " .. source:barSize()
	local text = Note .. delim .. Symbol .. delim .. TF .. delim .. Time

	terminal:alertEmail(Email, profile:id(), text)
end

function Pop(AlertLabel, AlertText, period)
	if not Show then
		return
	end

	local now = core.host:execute("getServerTime")
	now = core.host:execute("convertTime", core.TZ_EST, ToTime, now)
	local DATA = core.dateToTable(now)

	local delim = "\013\010"

	local Symbol = "Instrument : " .. source:instrument()
	local TF = "Time Frame : " .. source:barSize()
	local Time =
		"Date : " ..
		DATA.month .. " / " .. DATA.day .. delim .. " Time:  " .. DATA.hour .. " / " .. DATA.min .. " / " .. DATA.sec
	local Text = Symbol .. delim .. TF .. delim .. Time .. delim .. AlertLabel .. ":" .. AlertText
	core.host:execute("prompt", 1, profile:id(), Text)
end

function SoundAlert(Sound)
	if not PlaySound then
		return
	end

	terminal:alertSound(Sound, RecurrentSound)
end

function EmailAlert(AlertLabel, AlertText, period)
	if not SendEmail then
		return
	end

	local delim = "\013\010"

	local now = core.host:execute("getServerTime")
	now = core.host:execute("convertTime", core.TZ_EST, ToTime, now)
	local DATA = core.dateToTable(now)

	local Symbol = "Instrument : " .. source:instrument()
	local TF = "Time Frame : " .. source:barSize()
	local Time =
		"Date : " ..
		DATA.month .. " / " .. DATA.day .. delim .. " Time:  " .. DATA.hour .. " / " .. DATA.min .. " / " .. DATA.sec

	local Text = Symbol .. delim .. TF .. delim .. Time .. delim .. AlertLabel .. ":" .. AlertText

	terminal:alertEmail(Email, profile:id(), Text)
end

function SendAlert(AlertLabel, AlertText, period)
	if not ShowAlert then
		return
	end

	local delim = "\013\010"

	local now = core.host:execute("getServerTime")
	now = core.host:execute("convertTime", core.TZ_EST, ToTime, now)
	local DATA = core.dateToTable(now)

	local Symbol = "Instrument : " .. source:instrument()
	local TF = "Time Frame : " .. source:barSize()
	local Time =
		"Date : " ..
		DATA.month .. " / " .. DATA.day .. delim .. "Time :" .. DATA.hour .. " / " .. DATA.min .. " / " .. DATA.sec

	local Text = Symbol .. delim .. TF .. delim .. Time .. delim .. AlertLabel .. ":" .. AlertText

	terminal:alertMessage(source:instrument(), source[NOW], Text, source:date(NOW))
end
--+------------------------------------------------------------------------------------------------+
--|                                                                    We appreciate your support. | 
--+------------------------------------------------------------------------------------------------+
--|                                                               Paypal: https://goo.gl/9Rj74e    |
--|                                                             Patreon :  https://goo.gl/GdXWeN   |  
--+------------------------------------------------------------------------------------------------+
--|                                                                   Developed by : Mario Jemic   |                    
--|                                                                       mario.jemic@gmail.com    |
--|                                                        https://AppliedMachineLearning.systems  |
--|                                                                       https://mario-jemic.com/ |
--+------------------------------------------------------------------------------------------------+

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--+------------------------------------------------------------------------------------------------+