-- Id: 3078
-- More information about this indicator can be found at:
-- http://fxcodebase.com/

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function Init()
    strategy:name("Total profit signal");
	strategy:setTag("NonOptimizableParameters", "Email,SendEmail,SoundFile,RecurrentSound,PlaySound,ShowAlert");
    strategy:description("Level Entry/Exit Strategy");

    strategy.parameters:addGroup("Parameters");
    strategy.parameters:addDouble("ProfitLevel", "Profit level for signal", "", 2);

    strategy.parameters:addGroup("Notification");
    strategy.parameters:addBoolean("ShowAlert", "Show Alert", "", true);
    strategy.parameters:addBoolean("PlaySound", "Play Sound", "", true);
    strategy.parameters:addBoolean("RecurSound", "Recurrent Sound", "", true);
    strategy.parameters:addFile("SoundFile", "Sound File", "", "");
    strategy.parameters:setFlag("SoundFile", core.FLAG_SOUND);
    strategy.parameters:addBoolean("SendEmail", "Send Email", "", true);
    strategy.parameters:addString("Email", "Email", "", "");
    strategy.parameters:setFlag("Email", core.FLAG_EMAIL);
end

-- Parameters block
local gSource = nil; -- the source stream
local PlaySound;
local RecurrentSound;
local SoundFile;
local Email;
local SendEmail;
local LastProfit;
local Level;

-- strategy instance initialization routine
-- Processes strategy parameters and subscribe to price streams
-- TODO: Calculate all constants, create instances all necessary indicators and load all required libraries
function Prepare(nameOnly)

    local name = profile:id() .. "(" .. instance.bid:instrument() .. ")";
    instance:name(name);

    if nameOnly then
        return ;
    end

    AllowTicks = instance.parameters.AllowTicks;
    if (not(AllowTicks)) then
        assert(instance.parameters.TF ~= "t1", "The strategy cannot be applied on ticks.");
    end

    ShowAlert = instance.parameters.ShowAlert;
    if ShowAlert then
        PlaySound = instance.parameters.PlaySound;
        if PlaySound then
            RecurrentSound = instance.parameters.RecurSound;
            SoundFile = instance.parameters.SoundFile;
        else
            SoundFile = nil;
        end
        assert(not(PlaySound) or (PlaySound and SoundFile ~= ""), "Sound file must be specified");

        SendEmail = instance.parameters.SendEmail;
        if SendEmail then
            Email = instance.parameters.Email;
        else
            Email = nil;
        end
        assert(not(SendEmail) or (SendEmail and Email ~= ""), "E-mail address must be specified");
    end

    Level = instance.parameters.ProfitLevel;
    gSource = ExtSubscribe(1, nil, "t1", "Bid", "bar");

    ExtSetupSignal(profile:id() .. ":", ShowAlert);
    ExtSetupSignalMail(name);
    LastProfit=nil;

end

function ExtUpdate(id, source, period)
    local trades = core.host:findTable("trades");
    local enum = trades:enumerator();
    local TotalPL=0;
    while true do
     local row = enum:next();
     if row == nil then break end
     TotalPL=TotalPL+row.GrossPL;
    end
    
    if LastProfit~=nil then
     if (LastProfit-Level)*(TotalPL-Level)<=0 then
      if ShowAlert then
        ExtSignal(source, period, "Profit level crosses (" .. Level .. ")", SoundFile, Email, RecurrentSound);
      end
      core.host:execute("stop");
     end
    end
    LastProfit=TotalPL;
end


dofile(core.app_path() .. "\\strategies\\standard\\include\\helper.lua");