-- More information about this indicator can be found at:
-- http://fxcodebase.com/code/viewtopic.php?f=17&t=7635
-- Id: 20827

--+------------------------------------------------------------------+
--|                               Copyright © 2018, Gehtsoft USA LLC |
--|                                            http://fxcodebase.com |
--+------------------------------------------------------------------+
--|                                      Developed by : Mario Jemic  |
--|                                          mario.jemic@gmail.com   |
--+------------------------------------------------------------------+
--|                                 Support our efforts by donating  |
--|                                   Paypal: https://goo.gl/9Rj74e  |
--|                    Patreon : https://www.patreon.com/mariojemic  |
--|                    BitCoin : 15VCJTLaz12Amr7adHSBtL9v8XomURo9RF  |
--|               BitCoin Cash : 1BEtS465S3Su438Kc58h2sqvVvHK9Mijtg  |
--|           Ethereum : 0x8C110cD61538fb6d7A2B47858F0c0AaBd663068D  |
--|                   LiteCoin : LLU8PSY2vsq7B9kRELLZQcKf5nJQrdeqwD  |
--+------------------------------------------------------------------+

local indi_alerts = {};

function Init()
    indicator:name("Smoothed ADX Overlay")
    indicator:description("Smoothed ADX Overlay")
    indicator:requiredSource(core.Bar)
    indicator:type(core.Indicator)

    indicator.parameters:addGroup("Calculation")

    indicator.parameters:addString("TF", "Indicator Time Frame", "", "D1")
    indicator.parameters:setFlag("TF", core.FLAG_BARPERIODS_EDIT)

    indicator.parameters:addInteger("Period", "Period", "", 14)
    indicator.parameters:addDouble("Alpha1", "Alpha1", "", 0.25)
    indicator.parameters:addDouble("Alpha2", "Alpha2", "", 0.33)

    indicator.parameters:addGroup("Style")
    indicator.parameters:addColor("Strong_Uptrend_color",   "Strong Uptrend Color",   "Strong Uptrend Color",   core.rgb(0, 255, 0))
    indicator.parameters:addColor("Weak_Uptrend_color",     "Weak Uptrend Color",     "Weak Uptrend Color",     core.rgb(128, 255, 128))
    indicator.parameters:addColor("Strong_Downtrend_color", "Strong Downtrend Color", "Strong Downtrend Color", core.rgb(255, 0, 0))
    indicator.parameters:addColor("Weak_Downtrend_color",    "Weak Downtrend Color",  "Weak Downtrend Color",   core.rgb(255, 128, 128))

    indi_alerts:AddParameters(indicator.parameters);
    indi_alerts:AddAlert("Strong");
    indi_alerts:AddAlert("Weak");
end

local first
local source = nil
local Period
local Alpha1
local Alpha2

local Indicator

local DIP = nil
local DIM = nil
local ADX = nil
local signal
local TF

local dayoffset
local weekoffset
local SourceData
local loading = false
local Strong_Uptrend_color
local Weak_Uptrend_color
local Strong_Downtrend_color
local Weak_Downtrend_color

function Prepare(nameOnly)
    source = instance.source
    Period = instance.parameters.Period
    Alpha1 = instance.parameters.Alpha1
    Alpha2 = instance.parameters.Alpha2
    TF     = instance.parameters.TF
    Strong_Uptrend_color   = instance.parameters.Strong_Uptrend_color
    Weak_Uptrend_color     = instance.parameters.Weak_Uptrend_color
    Strong_Downtrend_color = instance.parameters.Strong_Downtrend_color
    Weak_Downtrend_color   = instance.parameters.Weak_Downtrend_color

    dayoffset  = core.host:execute("getTradingDayOffset")
    weekoffset = core.host:execute("getTradingWeekOffset")

    local name = profile:id() .. "(" .. source:name() .. ", " .. instance.parameters.Period .. ", " ..
        instance.parameters.Alpha1 .. ", " .. instance.parameters.Alpha2 .. ", " .. instance.parameters.TF .. ")"
    instance:name(name)

    if (nameOnly) then
        return
    end

    assert(
        core.indicators:findIndicator("SMOOTHED_ADX") ~= nil,
        "Please, download and install SMOOTHED_ADX.LUA indicator"
    )

    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!")

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

    Indicator = core.indicators:create("SMOOTHED_ADX", SourceData, Period, Alpha1, Alpha2)
    first = Indicator.DATA:first()

    DIP    = instance:addInternalStream(0, 0)
    DIM    = instance:addInternalStream(0, 0)
    ADX    = instance:addInternalStream(0, 0)
    signal = instance:addInternalStream(0, 0)

    open  = instance:addStream("openup",  core.Line, name, "", core.rgb(0, 0, 0), first)
    high  = instance:addStream("highup",  core.Line, name, "", core.rgb(0, 0, 0), first)
    low   = instance:addStream("lowup",   core.Line, name, "", core.rgb(0, 0, 0), first)
    close = instance:addStream("closeup", core.Line, name, "", core.rgb(0, 0, 0), first)
    instance:createCandleGroup("OVERLAY", "OVERLAY", open, high, low, close)

    indi_alerts:Prepare();
    indi_alerts.source = instance.source;
    instance:drawOnMainChart(true);
end

function Initialization(period)
    local Candle = core.getcandle(TF, source:date(period), dayoffset, weekoffset)

    if loading or SourceData:size() == 0 then
        return false
    end

    if period < source:first() then
        return false
    end

    local p = core.findDate(SourceData, Candle, false)

    -- candle is not found
    if p < 0 then
        return false
    else
        return p
    end
end

function Draw(stage, context) indi_alerts:Draw(stage, context, source); end

function Activate(alert, period, historical_period)
    if indi_alerts.Live ~= "Live" then period = period - 1; end
    alert.Alert[period] = 0;
    if alert.id == 1 and alert.ON then
        if signal[period] == 2 and signal[period] ~= signal[period - 1] then
            alert:UpAlert  (source, period, alert.Label .. " uptrend",   source.high[period], historical_period);
        elseif signal[period] == -2 and signal[period] ~= signal[period - 1] then
            alert:DownAlert(source, period, alert.Label .. " downtrend", source.low[period],  historical_period);
        end
    elseif alert.id == 2 and alert.ON then
        if signal[period] == 1 and signal[period] ~= signal[period - 1] then
            alert:UpAlert  (source, period, alert.Label .. " uptrend",   source.high[period], historical_period);
        elseif signal[period] == -1 and signal[period] ~= signal[period - 1] then
            alert:DownAlert(source, period, alert.Label .. " downtrend", source.low[period],  historical_period);
        end
    end

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

function Update(period, mode)
    open[period]  = source.open[period]
    close[period] = source.close[period]
    high[period]  = source.high[period]
    low[period]   = source.low[period]

    if period < first then
        open:setColor(period, Neutral)
        return
    end

    Indicator:update(mode)

    local p = Initialization(period)

    if not p then
        return
    end

    if Indicator.DATA:hasData(p) then
        DIP[period] = Indicator.DIP[p]
        DIM[period] = Indicator.DIM[p]
        ADX[period] = Indicator.ADX[p]
    end
    if DIP[period] > DIM[period] then
        if ADX[period] > ADX[period - 1] then
            signal[period] = 2
            open:setColor(period, Strong_Uptrend_color)
        else
            signal[period] = 1
            open:setColor(period, Weak_Uptrend_color)
        end
    else
        if ADX[period] < ADX[period - 1] then
            signal[period] = -2
            open:setColor(period, Strong_Downtrend_color)
        else
            signal[period] = -1
            open:setColor(period, Weak_Downtrend_color)
        end
    end
    for _, alert in ipairs(indi_alerts.Alerts) do Activate(alert, period, mode ~= core.UpdateLast); end
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.Version = "1.2";
indi_alerts.last_id = 0;
indi_alerts.FIRST = true;
indi_alerts.total_alerts = 2;
indi_alerts._alerts = {};
indi_alerts._telegram_timer = nil;
function indi_alerts:AddParameters(parameters)
    indicator.parameters:addGroup("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: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");
    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("Alerts Telegram");
    indicator.parameters:addBoolean("use_telegram", "Send Telegram", "", false);
    indicator.parameters:addString("telegram_key", "Telegram Key", "Used for @profit_robots_bot", "");
end

function indi_alerts:AsyncOperationFinished(cookie, success, message, message1, message2) if cookie == self._telegram_timer and #self._alerts > 0 then if self._telegram_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._telegram_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:addFile("Up" .. self.last_id, Label .. " Cross Over Sound", "", "");
    indicator.parameters:setFlag("Up" .. self.last_id, core.FLAG_SOUND);
    
    indicator.parameters:addFile("Down" .. self.last_id, Label .. " Cross Under Sound", "", "");
    indicator.parameters:setFlag("Down" .. self.last_id, core.FLAG_SOUND);
    
    indicator.parameters:addString("Label" .. self.last_id, "Label", "", Label);
end

indi_alerts.init = false;
function indi_alerts:Draw(stage, context)
    if stage ~= 102 then
        return;
    end
    if not self.init then
        context:createFont(1, "Wingdings", context:pointsToPixels(self.Size), context:pointsToPixels(self.Size), 0);
        self.init = true;
    end
    for period = math.max(context:firstBar(), self.source:first()), math.min(context:lastBar(), self.source:size()-1), 1 do
        x, x1, x2= context:positionOfBar(period);
        for _, level in ipairs(self.Alerts) do
            if level.Alert:hasData(period) then
                if level.Alert[period]== 1 then
                    visible, y = context:pointOfPrice (level.AlertLevel[period]);
                    width, height = context:measureText (1,  "\225", 0);
                    context:drawText (1,   "\225", self.UpTrendColor, -1,  x-width/2 ,  y-height , x+width/2 , y, 0 );    
                elseif level.Alert[period]== -1 then
                    visible, y = context:pointOfPrice (level.AlertLevel[period]);
                    width, height = context:measureText (1,  "\226", 0);
                    context:drawText (1,   "\226", self.DownTrendColor, -1,  x-width/2  ,  y , x+width/2 ,y+height, 0 );    
                end
            end
        end
    end
end
indi_alerts.Alerts = {};
function indi_alerts:Prepare()
    self.Show = instance.parameters.Show;
    self.Live = instance.parameters.Live;
    self.ShowAlert = instance.parameters.ShowAlert;
    
    self.UpTrendColor = instance.parameters.UpTrendColor;
    self.DownTrendColor = instance.parameters.DownTrendColor;
    self.Size = instance.parameters.Size;
    self.SendEmail = instance.parameters.SendEmail;

    self.PlaySound = instance.parameters.PlaySound;
    local i;
    for i = 1, self.total_alerts, 1 do 
        local alert = {};
        alert.id = i;
        alert.Label = instance.parameters:getString("Label" .. i);
        alert.ON = instance.parameters:getBoolean("ON" .. 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;
        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;
        alert.Alert = instance:addInternalStream(0, 0);
        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
        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.telegram_key ~= "" and instance.parameters.use_telegram then
        self._telegram_key = instance.parameters.telegram_key;
        require("http_lua");
        self._telegram_timer = 1234;
        core.host:execute("setTimer", self._telegram_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 date = self.source:date(period);
    local DATA = core.dateToTable(date);
    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 text = Note  .. delim ..  Symbol .. 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 date = self.source:date(period);
    local DATA = core.dateToTable (date);
    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 : " .. self.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