-- More information about this indicator can be found at:
-- http://fxcodebase.com/code/viewtopic.php?f=17&t=68858

--+------------------------------------------------------------------------------------------------+
--|                                                            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   |  
--+------------------------------------------------------------------------------------------------+
local indi_alerts = {}
indi_alerts.Version = "1.11"
indi_alerts.inverted_arrows = false
local alert_stages = {2}

function IsUpCondition(period)
    if Indicator == nil or period <= Indicator.DATA:first() or Indicator.DATA:size() - 1 < 2 then
        return false
    else
        return core.crossesOver(Indicator.DATA, 0, period)
    end
end

function IsDownCondition(period)
    if Indicator == nil or period <= Indicator.DATA:first() or Indicator.DATA:size() - 1 < 2 then
        return false
    else
        return core.crossesUnder(Indicator.DATA, 0, period)
    end
end

function Init()
    indicator:name("CCI with targets")
    indicator:description("")
    indicator:requiredSource(core.Bar)
    indicator:type(core.Indicator)

    indicator.parameters:addString("TF", "Indicator Time Frame", "", "D1")
    indicator.parameters:setFlag("TF", core.FLAG_BARPERIODS_EDIT)
    indicator.parameters:addInteger("cci_period", "CCI Period", "Period", 20)

    indicator.parameters:addDouble("Level1", "1. Target Ratio", "", 1)
    indicator.parameters:addDouble("Level2", "2. Target Ratio", "", 1.5)
    indicator.parameters:addDouble("Level3", "3. Target Ratio", "", 2)
    indicator.parameters:addDouble("Level4", "Trigger Line (in pips)", "", 0)
    indicator.parameters:addString("stop_mode", "Stop type", "", "Previous");
    indicator.parameters:addStringAlternative("stop_mode", "Recent high/low", "", "Recent");
    indicator.parameters:addStringAlternative("stop_mode", "Previous high/low", "", "Previous");

    indicator.parameters:addBoolean("Historical", "Show Historical", "", true)
    indicator.parameters:addString("ShowLabel", "Show Label", "", "no")
    indicator.parameters:addStringAlternative("ShowLabel", "Do not show", "", "no")
    indicator.parameters:addStringAlternative("ShowLabel", "At the left", "", "left")
    indicator.parameters:addStringAlternative("ShowLabel", "At the right", "", "right")

    indicator.parameters:addInteger("Lookback", "Label Lookback Period", "", 100)

    indicator.parameters:addGroup("Line Style")
    indicator.parameters:addColor("StartLineColor", "Start Line Color", "", core.rgb(0, 0, 255))
    indicator.parameters:addInteger("width1", "Line width", "", 1, 1, 5)
    indicator.parameters:addInteger("style1", "Line style", "", core.LINE_SOLID)
    indicator.parameters:setFlag("style1", core.FLAG_LINE_STYLE)

    indicator.parameters:addGroup("Label Style")
    indicator.parameters:addColor("LabelColor", "Label Color", "", core.COLOR_LABEL)
    indicator.parameters:addBoolean("LabelBackground", "Add Label Background", "", false)
    indicator.parameters:addColor("LabelBackgroundColor", "Label Background Color", "", core.COLOR_BACKGROUND)
    indicator.parameters:addInteger("FontSize", "Label Size", "", 8)
    indicator.parameters:addColor("StopLineColor", "Stop Line Color", "", core.rgb(255, 0, 0))
    indicator.parameters:addInteger("width2", "Line width", "", 1, 1, 5)
    indicator.parameters:addInteger("style2", "Line style", "", core.LINE_SOLID)
    indicator.parameters:setFlag("style2", core.FLAG_LINE_STYLE)

    indicator.parameters:addColor("TargetLineColor1", "1. Target Line Color", "", core.rgb(0, 255, 0))
    indicator.parameters:addInteger("width3", "Line width", "", 1, 1, 5)
    indicator.parameters:addInteger("style3", "Line style", "", core.LINE_SOLID)
    indicator.parameters:setFlag("style3", core.FLAG_LINE_STYLE)

    indicator.parameters:addColor("TargetLineColor2", "2. Target  Line Color", "", core.rgb(0, 255, 0))
    indicator.parameters:addInteger("width4", "Line width", "", 1, 1, 5)
    indicator.parameters:addInteger("style4", "Line style", "", core.LINE_SOLID)
    indicator.parameters:setFlag("style4", core.FLAG_LINE_STYLE)

    indicator.parameters:addColor("TargetLineColor3", "3. Target  Line Color", "", core.rgb(0, 255, 0))
    indicator.parameters:addInteger("width5", "Line width", "", 1, 1, 5)
    indicator.parameters:addInteger("style5", "Line style", "", core.LINE_SOLID)
    indicator.parameters:setFlag("style5", core.FLAG_LINE_STYLE)

    indicator.parameters:addColor("TargetLineColor4", "Trigger Line Color", "", core.rgb(0, 255, 0))
    indicator.parameters:addInteger("width6", "Line width", "", 1, 1, 5)
    indicator.parameters:addInteger("style6", "Line style", "", core.LINE_SOLID)
    indicator.parameters:setFlag("style6", core.FLAG_LINE_STYLE)

    indi_alerts:AddParameters(indicator.parameters)
    indi_alerts:AddAlert("CCI/0")
end

local Number = 1
local Size
local Show
local Live
local FIRST = true
local OnlyOnce
local UpTrendColor, DownTrendColor
local OnlyOnceFlag
local ShowAlert
local Shift = 0

local first
local source = nil
local btf_source = nil
local position = nil

local FontSize, LabelColor, font

local Level1, Level2, Level3, Level4
local LabelBackgroundColor
local LabelBackground
local Historical, ShowLabel
local Lookback
local TF
local dayoffset
local weekoffset
local cci_period

local labels = {}
local last_label_id = 0
function CreateLabel(color, style, width)
    local label = {}
    label.Id = last_label_id + 1
    label.LabelId = last_label_id + 2
    label.Color = color
    label.Style = style
    label.Width = width
    last_label_id = label.LabelId
    function label:Draw(p, color)
        local str = win32.formatNumber(self.Rate, false, source:getPrecision())
        core.host:execute(
            "drawLine",
            New(p, self.Id),
            self.DateEnd,
            self.Rate,
            self.Date,
            self.Rate,
            self.Color,
            self.Style,
            self.Width,
            str
        )
        if not LabelBackground and ShowLabel ~= "no" then
            if ShowLabel == "left" then
                core.host:execute(
                    "drawLabel1",
                    New(p, self.LabelId),
                    self.DateEnd,
                    core.CR_CHART,
                    self.Rate,
                    core.CR_CHART,
                    core.H_Right,
                    core.V_Top,
                    font,
                    LabelColor,
                    self.Text
                )
            else
                core.host:execute(
                    "drawLabel1",
                    New(p, self.LabelId),
                    self.Date,
                    core.CR_CHART,
                    self.Rate,
                    core.CR_CHART,
                    core.H_Left,
                    core.V_Top,
                    font,
                    LabelColor,
                    self.Text
                ) --   date = source:date(period)
            end
        end
    end
    return label
end

function Prepare(nameOnly)
    local name = profile:id() .. "(" .. instance.source:name() .. ")"
    instance:name(name)
    if (nameOnly) then
        return
    end
    indi_alerts:Prepare()
    indi_alerts.source = instance.source
    instance:drawOnMainChart(true)
    instance:ownerDrawn(true)
    cci_period = instance.parameters.cci_period

    dayoffset = core.host:execute("getTradingDayOffset")
    weekoffset = core.host:execute("getTradingWeekOffset")
    source = instance.source
    TF = instance.parameters.TF
    local s1, e1, s2, e2
    s1, e1 = core.getcandle(source:barSize(), 0, 0, 0)
    s2, e2 = core.getcandle(TF, 0, 0, 0)
    assert((e1 - s1) <= (e2 - s2), "The chosen time frame must be equal to or bigger than the chart time frame!")

    btf_source = core.host:execute("getSyncHistory", source:instrument(), TF, source:isBid(), 0, 100, 101)
    loading = true

    LabelBackgroundColor = instance.parameters.LabelBackgroundColor
    LabelBackground = instance.parameters.LabelBackground
    FontSize = instance.parameters.FontSize
    LabelColor = instance.parameters.LabelColor
    Historical = instance.parameters.Historical
    ShowLabel = instance.parameters.ShowLabel

    font = core.host:execute("createFont", "Arial", FontSize, false, false)

    OnlyOnceFlag = true
    FIRST = true
    OnlyOnce = instance.parameters.OnlyOnce
    Show = instance.parameters.Show
    Live = instance.parameters.Live
    Lookback = instance.parameters.Lookback

    Level1 = instance.parameters.Level1
    Level2 = instance.parameters.Level2
    Level3 = instance.parameters.Level3
    Level4 = instance.parameters.Level4

    labels[#labels + 1] =
        CreateLabel(instance.parameters.StartLineColor, instance.parameters.style1, instance.parameters.width1)
    labels[#labels + 1] =
        CreateLabel(instance.parameters.StopLineColor, instance.parameters.style2, instance.parameters.width2)
    labels[#labels + 1] =
        CreateLabel(instance.parameters.TargetLineColor1, instance.parameters.style3, instance.parameters.width3)
    labels[#labels + 1] =
        CreateLabel(instance.parameters.TargetLineColor2, instance.parameters.style4, instance.parameters.width4)
    labels[#labels + 1] =
        CreateLabel(instance.parameters.TargetLineColor3, instance.parameters.style5, instance.parameters.width5)
    if Level4 ~= 0 then
        labels[#labels + 1] =
            CreateLabel(instance.parameters.TargetLineColor4, instance.parameters.style6, instance.parameters.width6)
    end

    first = source:first() + 1

    position = instance:addInternalStream(0, 0)

    Indicator = core.indicators:create("CCI", btf_source, cci_period)

    FIRST_CANDLE = nil
end

local init = false
function Draw(stage, context)
    indi_alerts:Draw(stage, context, source)
    if stage ~= 2 then
        return
    end
    if not init then
        context:createFont(2, "Arial", 0, context:pointsToPixels(FontSize), 0)
        context:createSolidBrush(3, LabelBackgroundColor)
        init = true
    end
    for _, label in ipairs(labels) do
        DrawLabel(label, context)
    end
end

function DrawLabel(label, context)
    if label.Text ~= nil then
        local visible, y = context:pointOfPrice(label.Rate)
        local width, height = context:measureText(2, label.Text, 0)
        local x
        local pos
        if ShowLabel == "left" then
            x = context:positionOfDate(label.DateEnd)
            pos = context.RIGHT + context.TOP
        else
            x = context:positionOfDate(label.Date) - width
            pos = context.LEFT + context.TOP
        end
        context:drawText(2, label.Text, LabelColor, LabelBackgroundColor, x, y - height, x + width, y, pos)
    end
end

local ID = 0
local ids = {}
function New(period, id)
    if ids[period] == nil then
        ids[period] = {}
    end
    if ids[period][id] == nil then
        ids[period][id] = ID + 1
        ID = ID + 1
    end
    return ids[period][id]
end

function GetPeriod(period)
    local Candle = core.getcandle(TF, source:date(period), dayoffset, weekoffset)
    if loading or btf_source:size() == 0 then
        return false
    end
    if period < source:first() then
        return false
    end

    local p = core.findDate(btf_source, Candle, false)
    -- candle is not found
    if p < 0 then
        return false
    else
        return p
    end
end

function GetPrevPeriod(p)
    if p == 0 then
        return -1
    end
    local prev_date = btf_source:date(p - 1)
    return core.findDate(source, prev_date, false)
end

function Update(period, mode)
    Indicator:update(mode)
    local P = GetPeriod(period)
    if not P then
        return
    end
    if period < first then
        ID = 0
        return
    elseif period == first then
        ID = 0
    end
    local prev_period = GetPrevPeriod(P)
    if (period == first or prev_period == -1) then
        position[period] = 0
    else
        position[period] = position[period - 1]
    end

    if position[period] ~= -1 and IsDownCondition(P) then
        position[period] = -1
    elseif position[period] ~= 1 and IsUpCondition(P) then
        position[period] = 1
    end

    if (not Historical and period < source:size() - 1) or (Historical and period < source:size() - 1 - Lookback) then
        return
    end

    local p = FindLast(period)
    local Delta
    if p ~= 0 then
        local signalVal = source.close[period]
        if position[p] == 1 then
            Delta = math.abs(signalVal - source.high[p])
            labels[1].Rate = source.high[p]
            if instance.parameters.stop_mode == "Previous" then
                labels[2].Rate = source.high[p] - Delta
            else
                labels[2].Rate = source.high[period] - Delta
            end
            labels[3].Rate = source.high[p] + Delta * Level1
            labels[4].Rate = source.high[p] + Delta * Level2
            labels[5].Rate = source.high[p] + Delta * Level3
            if labels[6] ~= nil then
                labels[6].Rate = source.high[p] + source:pipSize() * Level4
            end
        elseif position[p] == -1 then
            Delta = math.abs(signalVal - source.low[p])
            labels[1].Rate = source.low[p]
            if instance.parameters.stop_mode == "Previous" then
                labels[2].Rate = source.high[p] + Delta
            else
                labels[2].Rate = source.high[period] + Delta
            end
            labels[3].Rate = source.low[p] - Delta * Level1
            labels[4].Rate = source.low[p] - Delta * Level2
            labels[5].Rate = source.low[p] - Delta * Level3
            if labels[6] ~= nil then
                labels[6].Rate = source.low[p] - source:pipSize() * Level4
            end
        else
            return
        end
        labels[1].Text = string.format("Entry : %s", labels[1].Rate)
        labels[2].Text =
            string.format("Stop : %s (%s)", labels[2].Rate, win32.formatNumber(Delta / source:pipSize(), false, 1))
        labels[3].Text =
            string.format(
            "1. Target : %s (%s)",
            win32.formatNumber(labels[3].Rate, false, source:getPrecision()),
            win32.formatNumber(Delta * Level1 / source:pipSize(), false, 1)
        )
        labels[4].Text =
            string.format(
            "2. Target : %s (%s)",
            win32.formatNumber(labels[4].Rate, false, source:getPrecision()),
            win32.formatNumber((Delta * Level2) / source:pipSize(), false, 1)
        )
        labels[5].Text =
            string.format(
            "3. Target : %s (%s)",
            win32.formatNumber(labels[5].Rate, false, source:getPrecision()),
            win32.formatNumber((Delta * Level3) / source:pipSize(), false, 1)
        )
        if labels[6] ~= nil then
            labels[6].Text =
                string.format(
                "Trigger : %s (%s)",
                win32.formatNumber(labels[6].Rate, false, source:getPrecision()),
                win32.formatNumber(Level4, false, 1)
            )
        end

        for i, label in ipairs(labels) do
            label.Date = source:date(period)
            label.DateEnd = source:date(p)
            label:Draw(p)
        end
    end
    for _, alert in ipairs(indi_alerts.Alerts) do
        Activate(alert, P, period, period ~= source:size() - 1)
    end
end

function Activate(alert, P, period, historical_period)
    if indi_alerts.Live ~= "Live" then
        period = period - 1
    end
    alert.Alert[period] = 0
    if not alert.ON then
        if indi_alerts.FIRST then
            indi_alerts.FIRST = false
        end
        return
    end
    if alert.id == 1 then
        if (IsUpCondition(P)) then
            alert:UpAlert(source, period, alert.Label .. ". Bull pattern", source.high[period], historical_period)
        elseif (IsDownCondition(P)) then
            alert:DownAlert(source, period, alert.Label .. ". Bear pattern", source.low[period], historical_period)
        end
    end

    if indi_alerts.FIRST then
        indi_alerts.FIRST = false
    end
end

function ReleaseInstance()
    core.host:execute("deleteFont", font)
end

function FindLast(period)
    for i = period, first, -1 do
        if position[i] ~= position[i - 1] then
            return i
        end
    end

    return 0
end

-- the function is called when the async operation is finished
function AsyncOperationFinished(cookie)
    indi_alerts:AsyncOperationFinished(cookie, success, message, message1, message2)
    if cookie == 100 then
        loading = false
        instance:updateFrom(0)
    elseif cookie == 101 then
        loading = true
    end
end

indi_alerts.last_id = 0
indi_alerts.FIRST = true
indi_alerts._alerts = {}
indi_alerts._advanced_alert_timer = nil
function indi_alerts:AddParameters(parameters)
    indicator.parameters:addGroup("Alert Mode")
    indicator.parameters:addString("Live", "End of Turn / Live", "", "Live")
    indicator.parameters:addStringAlternative("Live", "End of Turn", "", "End of Turn")
    indicator.parameters:addStringAlternative("Live", "Live", "", "Live")
    indicator.parameters:addBoolean("strategy_output", "Output for strategies", "Used by the strategies", false)

    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:addGroup("Alert Style")
    indicator.parameters:addInteger("Size", "Label Size", "", 10, 1, 100)

    indicator.parameters:addGroup("Alerts")
    indicator.parameters:addBoolean("Show", "Show Dialog box Alert", "", true)
    indicator.parameters:addBoolean("ShowAlert", "Show Alert", "", true)

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

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

    indicator.parameters:addGroup("External Alerts")
    indicator.parameters:addBoolean(
        "use_advanced_alert",
        "Send Advanced Alert",
        "Telegram/Discord/other platform (like MT4)",
        false
    )
    indicator.parameters:addString(
        "advanced_alert_key",
        "Advanced Alert Key",
        "You can get a key via @profit_robots_bot Telegram Bot. Visit ProfitRobots.com for Discord/other platform keys",
        ""
    )
end

function indi_alerts:AsyncOperationFinished(cookie, success, message, message1, message2)
    if cookie == self._advanced_alert_timer and #self._alerts > 0 then
        if self._advanced_alert_key == nil then
            return
        end
        local data = self:ArrayToJSON(self._alerts)
        self._alerts = {}
        local req = http_lua.createRequest()
        local query =
            string.format(
            '{"Key":"%s","StrategyName":"%s","Platform":"FXTS2","Notifications":%s}',
            self._advanced_alert_key,
            string.gsub(self.StrategyName or "", '"', '\\"'),
            data
        )
        req:setRequestHeader("Content-Type", "application/json")
        req:setRequestHeader("Content-Length", tostring(string.len(query)))
        req:start("http://profitrobots.com/api/v1/notification", "POST", query)
    end
end
function indi_alerts:ToJSON(item)
    local json = {}
    function json:AddStr(name, value)
        local separator = ""
        if self.str ~= nil then
            separator = ","
        else
            self.str = ""
        end
        self.str = self.str .. string.format('%s"%s":"%s"', separator, tostring(name), tostring(value))
    end
    function json:AddNumber(name, value)
        local separator = ""
        if self.str ~= nil then
            separator = ","
        else
            self.str = ""
        end
        self.str = self.str .. string.format('%s"%s":%f', separator, tostring(name), value or 0)
    end
    function json:AddBool(name, value)
        local separator = ""
        if self.str ~= nil then
            separator = ","
        else
            self.str = ""
        end
        self.str = self.str .. string.format('%s"%s":%s', separator, tostring(name), value and "true" or "false")
    end
    function json:ToString()
        return "{" .. (self.str or "") .. "}"
    end
    local first = true
    for idx, t in pairs(item) do
        local stype = type(t)
        if stype == "number" then
            json:AddNumber(idx, t)
        elseif stype == "string" then
            json:AddStr(idx, t)
        elseif stype == "boolean" then
            json:AddBool(idx, t)
        elseif stype == "function" or stype == "table" then
        else
            core.host:trace(tostring(idx) .. " " .. tostring(stype))
        end
    end
    return json:ToString()
end
function indi_alerts:ArrayToJSON(arr)
    local str = "["
    for i, t in ipairs(self._alerts) do
        local json = self:ToJSON(t)
        if str == "[" then
            str = str .. json
        else
            str = str .. "," .. json
        end
    end
    return str .. "]"
end
function indi_alerts:AddAlert(label)
    self.last_id = self.last_id + 1
    indicator.parameters:addGroup(label .. " Alert")

    indicator.parameters:addBoolean("ON" .. self.last_id, "Show " .. label .. " Alert", "", true)

    indicator.parameters:addString("drawing_mode" .. self.last_id, "Drawing mode", "", "arrows")
    indicator.parameters:addStringAlternative("drawing_mode" .. self.last_id, "Arrows", "", "arrows")
    indicator.parameters:addStringAlternative("drawing_mode" .. self.last_id, "Vertical lines", "", "vlines")

    indicator.parameters:addFile("Up" .. self.last_id, label .. " Cross Over Sound", "", "")
    indicator.parameters:setFlag("Up" .. self.last_id, core.FLAG_SOUND)
    indicator.parameters:addInteger("UpSymbol" .. self.last_id, "Up Symbol", "", 217)
    indicator.parameters:addColor("UpColor" .. self.last_id, "Up Color", "", core.rgb(0, 255, 0))

    indicator.parameters:addFile("Down" .. self.last_id, label .. " Cross Under Sound", "", "")
    indicator.parameters:setFlag("Down" .. self.last_id, core.FLAG_SOUND)
    indicator.parameters:addInteger("DownSymbol" .. self.last_id, "Down Symbol", "", 218)
    indicator.parameters:addColor("DownColor" .. self.last_id, "Down Color", "", core.rgb(255, 0, 0))

    indicator.parameters:addString("Label" .. self.last_id, "Label", "", label)
end

function indi_alerts:AddSingleAlert(Label)
    self.last_id = self.last_id + 1
    indicator.parameters:addGroup(Label .. " Alert")

    indicator.parameters:addBoolean("ON" .. self.last_id, "Show " .. Label .. " Alert", "", true)

    indicator.parameters:addFile("Up" .. self.last_id, Label .. " Sound", "", "")
    indicator.parameters:setFlag("Up" .. self.last_id, core.FLAG_SOUND)
    indicator.parameters:addInteger("UpSymbol" .. self.last_id, "Symbol", "", 217)
    indicator.parameters:addColor("UpColor" .. self.last_id, "Color", "", core.rgb(0, 255, 0))

    indicator.parameters:addString("Label" .. self.last_id, "Label", "", Label)
end

function indi_alerts:DrawAlert(context, alert, period)
    if not alert.Alert:hasData(period) then
        return
    end

    if alert.Alert[period] == 1 then
        local x = context:positionOfBar(period)
        if alert.DrawingMode == "arrows" then
            visible, y = context:pointOfPrice(alert.AlertLevel[period])
            width, height = context:measureText(self._stages[alert.Stage].FONT_ID, alert.UpSymbol, 0)
            local x1 = x - width / 2
            local x2 = x + width / 2
            local y1, y2
            if self.inverted_arrows then
                y1 = y
                y2 = y + height
            else
                y1 = y - height
                y2 = y
            end
            context:drawText(self._stages[alert.Stage].FONT_ID, alert.UpSymbol, alert.UpColor, -1, x1, y1, x2, y2, 0)
        else
            context:drawLine(alert.UpLinePen, x, context:top(), x, context:bottom())
        end
    elseif alert.Alert[period] == -1 then
        local x = context:positionOfBar(period)
        if alert.DrawingMode == "arrows" then
            visible, y = context:pointOfPrice(alert.AlertLevel[period])
            width, height = context:measureText(self._stages[alert.Stage].FONT_ID, alert.DownSymbol, 0)
            local x1 = x - width / 2
            local x2 = x + width / 2
            local y1, y2
            if self.inverted_arrows then
                y1 = y - height
                y2 = y
            else
                y1 = y
                y2 = y + height
            end
            context:drawText(
                self._stages[alert.Stage].FONT_ID,
                alert.DownSymbol,
                alert.DownColor,
                -1,
                x1,
                y1,
                x2,
                y2,
                0
            )
        else
            context:drawLine(alert.DownLinePen, x, context:top(), x, context:bottom())
        end
    end
end
indi_alerts.NextId = 1
indi_alerts._stages = {}
function indi_alerts:Draw(stage, context)
    if self._stages[stage] == nil then
        self._stages[stage] = {}
        self._stages[stage].createFont = false
        for _, level in ipairs(self.Alerts) do
            if level.Stage == stage then
                if level.DrawingMode == "vlines" then
                    level.UpLinePen = self.NextId
                    self.NextId = self.NextId + 1
                    level.DownLinePen = self.NextId
                    self.NextId = self.NextId + 1
                    context:createPen(level.UpLinePen, context.SOLID, 1, level.UpColor)
                    context:createPen(level.DownLinePen, context.SOLID, 1, level.DownColor)
                else
                    self._stages[stage].createFont = true
                end
            end
        end
        if self._stages[stage].createFont and self._stages[stage].FONT_ID == nil then
            self._stages[stage].FONT_ID = self.NextId
            self.NextId = self.NextId + 1
            context:createFont(
                self._stages[stage].FONT_ID,
                "Wingdings",
                context:pointsToPixels(self.Size),
                context:pointsToPixels(self.Size),
                0
            )
        end
    end
    for period = math.max(context:firstBar(), self.source:first()), math.min(context:lastBar(), self.source:size() - 1), 1 do
        for _, level in ipairs(self.Alerts) do
            if level.Stage == stage then
                self:DrawAlert(context, level, period)
            end
        end
    end
end
indi_alerts.Alerts = {}
function indi_alerts:GetTimezone()
    local tz = instance.parameters.ToTime
    if tz == 1 then
        return core.TZ_EST
    elseif tz == 2 then
        return core.TZ_UTC
    elseif tz == 3 then
        return core.TZ_LOCAL
    elseif tz == 4 then
        return core.TZ_SERVER
    elseif tz == 5 then
        return core.TZ_FINANCIAL
    elseif tz == 6 then
        return core.TZ_TS
    end
end
function indi_alerts:Prepare()
    self.Show = instance.parameters.Show
    self.Live = instance.parameters.Live
    self.ShowAlert = instance.parameters.ShowAlert
    self.ToTime = self:GetTimezone()

    self.Size = instance.parameters.Size
    self.SendEmail = instance.parameters.SendEmail

    self.PlaySound = instance.parameters.PlaySound
    local i
    for i = 1, 100 do
        local on = instance.parameters:getBoolean("ON" .. i)
        if on == nil then
            break
        end
        local alert = {}
        alert.id = i
        alert.Stage = alert_stages[i]
        alert.Label = instance.parameters:getString("Label" .. i)
        alert.ON = on
        alert.DrawingMode = instance.parameters:getString("drawing_mode" .. i)
        alert.UpSymbol = string.char(instance.parameters:getInteger("UpSymbol" .. i))
        local down_symbol = instance.parameters:getInteger("DownSymbol" .. i)
        if down_symbol ~= nil then
            alert.DownSymbol = string.char(down_symbol)
        end
        alert.UpColor = instance.parameters:getColor("UpColor" .. i)
        alert.DownColor = instance.parameters:getColor("DownColor" .. i)
        alert.Up = self.PlaySound and instance.parameters:getString("Up" .. i) or nil
        alert.Down = self.PlaySound and instance.parameters:getString("Down" .. i) or nil
        if alert.DownSymbol == nil then
            alert.DownSymbol = alert.UpSymbol
            alert.DownColor = alert.UpColor
            alert.Down = alert.Up
        end
        assert(
            not (self.PlaySound) or (self.PlaySound and alert.Up ~= "") or (self.PlaySound and alert.Up ~= ""),
            "Sound file must be chosen"
        )
        assert(
            not (self.PlaySound) or (self.PlaySound and alert.Down ~= "") or (self.PlaySound and alert.Down ~= ""),
            "Sound file must be chosen"
        )
        alert.U = nil
        alert.D = nil
        if instance.parameters.strategy_output then
            alert.Alert =
                instance:addStream(
                "strat_signal_" .. i,
                core.Dot,
                "strat_signal_" .. i,
                "Strategy signal #" .. i,
                core.rgb(0, 0, 0),
                0,
                0
            )
        else
            alert.Alert = instance:addInternalStream(0, 0)
        end
        alert.AlertLevel = instance:addInternalStream(0, 0)
        function alert:DownAlert(source, period, text, level, historical_period)
            shift = indi_alerts.Live ~= "Live" and 1 or 0
            self.Alert[period] = -1
            self.AlertLevel[period] = level
            self.U = nil
            if self.D ~= source:serial(period) and period == source:size() - 1 - shift and not indi_alerts.FIRST then
                self.D = source:serial(period)
                if not historical_period then
                    indi_alerts:SoundAlert(self.Down)
                    indi_alerts:EmailAlert(self.Label, text, period)
                    indi_alerts:SendAlert(self.Label, text, period)
                    if indi_alerts.Show then
                        indi_alerts:Pop(self.Label, text)
                    end
                end
            end
        end
        function alert:UpAlert(source, period, text, level, historical_period)
            shift = indi_alerts.Live ~= "Live" and 1 or 0
            self.Alert[period] = 1
            self.AlertLevel[period] = level
            self.D = nil
            if self.U ~= source:serial(period) and period == source:size() - 1 - shift and not indi_alerts.FIRST then
                self.U = source:serial(period)
                if not historical_period then
                    indi_alerts:SoundAlert(self.Up)
                    indi_alerts:EmailAlert(self.Label, text, period)
                    indi_alerts:SendAlert(self.Label, text, period)
                    if indi_alerts.Show then
                        indi_alerts:Pop(self.Label, text)
                    end
                end
            end
        end
        function alert:GetLast(period)
            for i = period, 0, -1 do
                if self.Alert:hasData(i) and self.Alert[i] ~= 0 then
                    return self.Alert[i], i, self.AlertLevel[i]
                end
            end
        end
        self.Alerts[#self.Alerts + 1] = alert
    end

    self.Email = self.SendEmail and instance.parameters.Email or nil
    assert(not (self.SendEmail) or (self.SendEmail and self.Email ~= ""), "E-mail address must be specified")
    self.RecurrentSound = instance.parameters.RecurrentSound

    if instance.parameters.advanced_alert_key ~= "" and instance.parameters.use_advanced_alert then
        self._advanced_alert_key = instance.parameters.advanced_alert_key
        require("http_lua")
        self._advanced_alert_timer = 1234
        core.host:execute("setTimer", self._advanced_alert_timer, 1)
    end
end

function indi_alerts:Pop(label, note)
    core.host:execute("prompt", 1, label, self.source:instrument() .. " " .. label .. " : " .. note)
end

function indi_alerts:SoundAlert(Sound)
    if not self.PlaySound then
        return
    end
    terminal:alertSound(Sound, self.RecurrentSound)
end

function indi_alerts:EmailAlert(label, Subject, period)
    if not self.SendEmail then
        return
    end

    local now = self.source:date(period)
    now = core.host:execute("convertTime", core.TZ_EST, self.ToTime, now)
    local DATA = core.dateToTable(now)
    local delim = "\013\010"
    local Note = profile:id() .. delim .. " Label : " .. label .. delim .. " Alert : " .. Subject
    local Symbol = "Instrument : " .. self.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(self.Email, profile:id(), text)
end

function indi_alerts:SendAlert(label, Subject, period)
    if not self.ShowAlert then
        return
    end

    local now = self.source:date(period)
    now = core.host:execute("convertTime", core.TZ_EST, self.ToTime, now)
    local DATA = core.dateToTable(now)
    local delim = "\013\010"
    local Note = profile:id() .. delim .. " Label : " .. label .. delim .. " Alert : " .. Subject
    local Symbol = "Instrument : " .. self.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:alertMessage(self.source:instrument(), self.source[NOW], text, self.source:date(NOW))
end

function indi_alerts:AlertTelegram(message, instrument, timeframe)
    local alert = {}
    alert.Text = message or ""
    alert.Instrument = instrument or ""
    alert.TimeFrame = timeframe or ""
    self._alerts[#self._alerts + 1] = alert
end
--+------------------------------------------------------------------------------------------------+
--|                                                                    We appreciate your support. | 
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--+------------------------------------------------------------------------------------------------+
--|                                                                   Developed by : Mario Jemic   |                    
--|                                                                       mario.jemic@gmail.com    |
--|                                                        https://AppliedMachineLearning.systems  |
--|                                                                       https://mario-jemic.com/ |
--+------------------------------------------------------------------------------------------------+

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