-- Id: 
-- More information about this indicator can be found at:
-- http://fxcodebase.com/code/viewtopic.php?f=17&t=66863

--+------------------------------------------------------------------+
--|                               Copyright © 2018, Gehtsoft USA LLC |
--|                                            http://fxcodebase.com |
--+------------------------------------------------------------------+
--|                                      Developed by : Mario Jemic  |
--|                                          mario.jemic@gmail.com   |
--+------------------------------------------------------------------+
--|                                 Support our efforts by donating  |
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--+------------------------------------------------------------------+

local indi_alerts = {};

function Init()
    indicator:name("Previous Week High-Low Fibo");
    indicator:description("");
    indicator:requiredSource(core.Bar);
    indicator:type(core.Indicator);

    indicator.parameters:addDouble("fib1", "Fibonacci Level #1", "", 0.382);
    indicator.parameters:addDouble("fib2", "Fibonacci Level #2", "", 1.27);

    indi_alerts:AddParameters(indicator.parameters);
    indi_alerts:AddAlert("Fibonacci #1 Cross");

    indicator.parameters:addGroup("Style");
    indicator.parameters:addColor("clr_wh", "Week High Color", "", core.rgb(0, 255, 0));
    indicator.parameters:addInteger("width_wh", "Week High Width", "", 1, 1, 5);
    indicator.parameters:addInteger("style_wh", "Week High Style", "", core.LINE_SOLID);
    indicator.parameters:setFlag("style_wh", core.FLAG_LEVEL_STYLE);
    indicator.parameters:addColor("clr_wl", "Week Low Color", "", core.rgb(255, 0, 0));
    indicator.parameters:addInteger("width_wl", "Week Low Width", "", 1, 1, 5);
    indicator.parameters:addInteger("style_wl", "Week Low Style", "", core.LINE_SOLID);
    indicator.parameters:setFlag("style_wl", core.FLAG_LEVEL_STYLE);
    indicator.parameters:addColor("clr_fib1", "Fibonacci Level #1 Color", "", core.rgb(0, 0, 255));
    indicator.parameters:addInteger("width_fib1", "Fibonacci Level #1 Width", "", 1, 1, 5);
    indicator.parameters:addInteger("style_fib1", "Fibonacci Level #1 Style", "", core.LINE_SOLID);
    indicator.parameters:setFlag("style_fib1", core.FLAG_LEVEL_STYLE);
    indicator.parameters:addColor("clr_fib2", "Fibonacci Level #2 Color", "", core.rgb(0, 255, 255));
    indicator.parameters:addInteger("width_fib2", "Fibonacci Level #2 Width", "", 1, 1, 5);
    indicator.parameters:addInteger("style_fib2", "Fibonacci Level #2Style", "", core.LINE_SOLID);
    indicator.parameters:setFlag("style_fib2", core.FLAG_LEVEL_STYLE);
end

local source;
local up, down;
local Size1;
local ma;
local w1_source;
local loading;
local fib1;
local fib2;
local week_high;
local week_low;

function Prepare(nameOnly) 
    source = instance.source;
    Size1 = instance.parameters.Size1;
    
    local name = profile:id() .. "(" .. source:name() .. ")";
    instance:name(name);
    
    if (nameOnly) then
        return;
    end

    w1_source = core.host:execute("getSyncHistory", source:instrument(), "W1", source:isBid(), 0, 2, 1);
    loading = true;
    
    week_high = instance:addStream("WH", core.Line, "Week High", "Week High", instance.parameters.clr_wh, 0);
    week_high:setWidth(instance.parameters.width_wh);
    week_high:setStyle(instance.parameters.style_wh);
    week_low = instance:addStream("WL", core.Line, "Week Low", "Week Low", instance.parameters.clr_wl, 0);
    week_low:setWidth(instance.parameters.width_wl);
    week_low:setStyle(instance.parameters.style_wl);
    fib1 = instance:addStream("F1", core.Line, "Fibonacci #1", "Fibonacci #1", instance.parameters.clr_fib1, 0);
    fib1:setWidth(instance.parameters.width_fib1);
    fib1:setStyle(instance.parameters.style_fib1);
    fib2 = instance:addStream("F2", core.Line, "Fibonacci #2", "Fibonacci #2", instance.parameters.clr_fib2, 0);
    fib2:setWidth(instance.parameters.width_fib2);
    fib2:setStyle(instance.parameters.style_fib2);
    indi_alerts:Prepare();
    indi_alerts.source = instance.source;
    instance:ownerDrawn(true);
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
        local date = source:date(period);
        local w1_period = core.findDate(w1_source, date, false);
        if w1_source.open[w1_period - 1] > w1_source.close[w1_period]
            and core.crossesOver(source.close, fib1, period)
        then
            alert:UpAlert(source, period, alert.Label .. ". Bull pattern", source.high[period], historical_period);
        elseif w1_source.open[w1_period - 1] <= w1_source.close[w1_period]
            and core.crossesUnder(source.close, fib1, period)
        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 AsyncOperationFinished(cookie, success, message, message1, message2)
    indi_alerts:AsyncOperationFinished(cookie, success, message, message1, message2)
    if cookie == 1 then
        loading = true;
    elseif cookie == 2 then
        loading = false;
        instance:updateFrom(0);
    end
end

function Update(period, mode)
    if loading then
        return;
    end

    local date = source:date(period);
    local w1_period = core.findDate(w1_source, date, false);
    if w1_period <= 0 then
        return;
    end
    week_high[period] = w1_source.high[w1_period - 1];
    week_low[period] = w1_source.low[w1_period - 1];
    local range = week_high[period] - week_low[period];
    if w1_source.open[w1_period - 1] > w1_source.close[w1_period] then
        fib1[period] = week_low[period] + range * instance.parameters.fib1;
        fib2[period] = week_low[period] + range * instance.parameters.fib2;
    else
        fib1[period] = week_high[period] - range * instance.parameters.fib1;
        fib2[period] = week_high[period] - range * instance.parameters.fib2;
    end

    for _, alert in ipairs(indi_alerts.Alerts) do Activate(alert, period, period ~= source:size() - 1); end
end

indi_alerts.Version = "1.4";
indi_alerts.last_id = 0;
indi_alerts.FIRST = true;
indi_alerts.total_alerts = 1;
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: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: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", "", false);
    indicator.parameters:addBoolean("ShowAlert", "Show Alert", "", false);
    
    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);

    indicator.parameters:addGroup("External Alerts");
    indicator.parameters:addBoolean("use_advanced_alert", "Send Advanced Alert", "Telegram or Telegram Channel", false);
    indicator.parameters:addString("telegram_key", "Advanced Alert 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._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" , "", false);

    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: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:addString("Label" .. self.last_id, "Label", "", Label);
end

indi_alerts.init = false;
function indi_alerts:Draw(stage, context)
    if stage ~= 2 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, level.UpSymbol, 0);
                    context:drawText(1, level.UpSymbol, 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, level.DownSymbol, 0);
                    context:drawText(1, level.DownSymbol, self.DownTrendColor, -1, x - width / 2, y, x + width/2, y + height, 0);
                end
            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.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.UpSymbol = string.char(instance.parameters:getInteger("UpSymbol" .. i));
        alert.DownSymbol = string.char(instance.parameters:getInteger("DownSymbol" .. 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.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