-- Id: 21747
-- More information about this indicator can be found at:
-- http://fxcodebase.com/code/viewtopic.php?f=17&t=7806
-- Id: 21710

--+------------------------------------------------------------------+
--|                               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://goo.gl/GdXWeN  |
--|                    BitCoin : 15VCJTLaz12Amr7adHSBtL9v8XomURo9RF  |
--|               BitCoin Cash : 1BEtS465S3Su438Kc58h2sqvVvHK9Mijtg  |
--|           Ethereum : 0x8C110cD61538fb6d7A2B47858F0c0AaBd663068D  |
--|                   LiteCoin : LLU8PSY2vsq7B9kRELLZQcKf5nJQrdeqwD  |
--+------------------------------------------------------------------+

local indi_alerts = {};
function Init()
    indicator:name("Alternate Ichimoku");
    indicator:description("Alternate Ichimoku");
    indicator:requiredSource(core.Bar);
    indicator:type(core.Indicator);
    indicator.parameters:addGroup("Calculation");
    indicator.parameters:addInteger("PERIOD", "Period", "Period", 75);
    indicator.parameters:addInteger("Shift", "Shift", "shift", 75);
    
    indicator.parameters:addGroup("Style");
    indicator.parameters:addBoolean("ShowCloud", "Show Cloud Lines", "", false);
    indicator.parameters:addColor("Out_Up", "Color of Cloud Up Line", "", core.rgb(0, 0, 222));
    indicator.parameters:addColor("Out_Down", "Color of Cloud Down Line", "", core.rgb(0, 0, 222));
    
    indicator.parameters:addColor("CloudColor", "Cloud color", "", core.rgb(0, 0, 255));
    indicator.parameters:addInteger("transparency", "Cloud transparency (%)", "", 70, 0, 100);
       
    indicator.parameters:addBoolean("ShowMid", "Show Mid Line", "", false);  
    indicator.parameters:addColor("Mid", "Mid Line Color", "", core.rgb(128, 128, 128));

    indi_alerts:AddParameters(indicator.parameters);
    indi_alerts:AddAlert("Middle line cross");
    indicator.parameters:addBoolean("mid_line_outside_channel_alert", "Alert when outside channel only", "", false);
end

-- Indicator instance initialization routine
-- Processes indicator parameters and creates output streams
-- TODO: Refine the first period calculation for each of the output streams.
-- TODO: Calculate all constants, create instances all subsequent indicators and load all required libraries
-- Parameters block
local PERIOD;
local Shift;

local first;
local source = nil;

local transparency;
local mid_line_outside_channel_alert;

-- Streams block
local Out = {};
local ShowCloud;
local CloudColor;
local Out_Up;
local Out_Down;
local ShowMid;
local Mid;

-- Routine
function Prepare(nameOnly)
    Mid= instance.parameters.Mid;
    ShowMid= instance.parameters.ShowMid;
    Out_Up= instance.parameters.Out_Up;
    Out_Down= instance.parameters.Out_Down;
    CloudColor= instance.parameters.CloudColor;
    transparency= instance.parameters.transparency;
    ShowCloud= instance.parameters.ShowCloud;
    PERIOD = instance.parameters.PERIOD;
    Shift = instance.parameters.Shift;
    mid_line_outside_channel_alert = instance.parameters.mid_line_outside_channel_alert;
    source = instance.source;
    first = math.max(source:first()+ PERIOD-1 + Shift,  source:first()+ PERIOD *1.68);

    local name = profile:id() .. "(" .. source:name() .. ", " .. PERIOD .. ", " .. Shift .. ")";
    instance:name(name);
    if nameOnly then
        return;
    end
    
    Out[1] = instance:addStream("Out1", core.Line, name, "Top", Out_Up, first);
    Out[2] = instance:addStream("Out2", core.Line, name, "Bottom", Out_Down, first);    
    Out[3] = instance:addStream("Out3", core.Line, name, "Mid", Mid, first);
    Out[4] = instance:addStream("Out4", core.Line, name, "Mid", Mid, first);
    
    if  ShowCloud then
        Out[1]:setStyle (core.LINE_NONE);
        Out[2]:setStyle (core.LINE_NONE);    
    end
    
    if not ShowMid then 
        Out[3]:setStyle (core.LINE_NONE);    
    end
    
    instance:createChannelGroup("Cloud", "Cloud", Out[1], Out[2], CloudColor, 100 - transparency);

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

-- Indicator calculation routine
-- TODO: Add your code for calculation output values
function Update(period)
    if period  < first or  not source:hasData(period) then
        return;
    end
    
    local min, max;
    local MIN, MAX;
    local Tsmin,Tsmax;
    min, max = mathex.minmax (source, period - PERIOD +1 , period );
    MIN, MAX = mathex.minmax (source, math.max( period - PERIOD-1 - Shift, source:first())  , math.min(source:size()-1, period - Shift));
    Tsmin,Tsmax = mathex.minmax (source, period - PERIOD *1.68 , period );

    Out[1][period] = (min + max) / 2;
    Out[2][period] = (MIN + MAX) / 2;
    Out[3][period] = (Out[1][period] + Out[2][period]) / 2;
    Out[4][period] = (Tsmin + Tsmax) / 2;

    for _, alert in ipairs(indi_alerts.Alerts) do Activate(alert, period, period ~= source:size() - 1); 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 core.crossesOver(source.close, Out[4], period)
            and (not mid_line_outside_channel_alert or Out[4][period] > math.max(Out[1][period], Out[2][period]))
        then
            alert:UpAlert(source, period, alert.Label .. " up", source.high[period], historical_period);
        elseif core.crossesUnder(source.close, Out[4], period)
            and (not mid_line_outside_channel_alert or Out[4][period] < math.min(Out[1][period], Out[2][period]))
        then
            alert:DownAlert(source, period, alert.Label .. " down", source.low[period], historical_period);
        end
    end

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

function AsyncOperationFinished(cookie)
    indi_alerts:AsyncOperationFinished(cookie, success, message, message1, message2)
end

indi_alerts.Version = "1.2.1";
indi_alerts.last_id = 0;
indi_alerts.FIRST = true;
indi_alerts.total_alerts = 1;
indi_alerts._alerts = {};
indi_alerts._telegram_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: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("External Alerts");
    indicator.parameters:addBoolean("use_telegram", "Send external alert", "Telegram or Telegram Channel", false);
    indicator.parameters:addString("telegram_key", "External Key", "Start converstation with @profit_robots_bot Telegram Bot to get the key", "");
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