-- More information about this indicator can be found at:
-- https://fxcodebase.com/code/viewtopic.php?f=17&t=71571

--+------------------------------------------------------------------------------------------------+
--|                                                            Copyright © 2021, Gehtsoft USA LLC  | 
--|                                                                         http://fxcodebase.com  |
--+------------------------------------------------------------------------------------------------+
--|                                                              Support our efforts by donating   | 
--|                                                                 Paypal: https://goo.gl/9Rj74e  |
--+------------------------------------------------------------------------------------------------+
--|                                                                   Developed by : Mario Jemic   |                    
--|                                                                       mario.jemic@gmail.com    |
--|                                                        https://AppliedMachineLearning.systems  |
--|                                                             Patreon :  https://goo.gl/GdXWeN   |  
--+------------------------------------------------------------------------------------------------+

--+------------------------------------------------------------------------------------------------+
--|BitCoin Address            : 15VCJTLaz12Amr7adHSBtL9v8XomURo9RF                                 |
--|Ethereum Address           : 0x8C110cD61538fb6d7A2B47858F0c0AaBd663068D                         |
--|Cardano/ADA                : addr1v868jza77crzdc87khzpppecmhmrg224qyumud6utqf6f4s99fvqv         |  
--|Dogecoin Address           : DNDTFfmVa2Gjts5YvSKEYaiih6cums2L6C                                 |
--|Binance(ERC20 & BSC only)  : 0xe84751063de8ade7c5fbff5e73f6502f02af4e2c                         |                                                  |   
--+------------------------------------------------------------------------------------------------+

-- Indicator profile initialization routine
-- Defines indicator profile properties and indicator parameters
function Init()
    indicator:name("DOM");
    indicator:description("");
    indicator:requiredSource(core.Bar);
    indicator:type(core.Indicator);
	
	
    indicator.parameters:addGroup("Calculation");
    indicator.parameters:addString("Id", "Database Id", "", "1");
    indicator.parameters:addString("TF", "Signal Time Frame ", "", "m15");
    indicator.parameters:setFlag("TF", core.FLAG_PERIODS);

 
	
    indicator.parameters:addInteger("BoxSize", "Size of price box in pips", "", 2);
 
	indicator.parameters:addString("Type", "Indicator Type", "", "Consolidated");
    indicator.parameters:addStringAlternative("Type", "Consolidated", "", "Consolidated");
    indicator.parameters:addStringAlternative("Type", "Aligned", "", "Aligned");
 
	
	indicator.parameters:addGroup("Style");
  --  indicator.parameters:addInteger("NumberOfPoints", "Number of points", "Number of points to display histogram", 200); 
	indicator.parameters:addDouble("transparency", "Transparency", "Transparency", 50); 
	indicator.parameters:addColor("Long", "Long Color", "", core.COLOR_UPCANDLE );
	indicator.parameters:addColor("Short", "Short Color", "", core.COLOR_DOWNCANDLE);
	indicator.parameters:addColor("Line_Color", "Line Color", "", core.COLOR_LABEL );	
	
	indicator.parameters:addInteger("LabelSize", "Label Size as Percentage", "", 75);
 
end

-- Indicator instance initialization routine
-- Processes indicator parameters and creates output streams
-- Parameters block
local Type;
local BoxSize;
--local NumberOfPoints;

local source = nil; 
local first;
local Transparency;
local  Long,Short;
 
local offset, weekoffset;    -- params for candle calculation
  
local min,max ;

local TF;
local LabelSize;
local Source, loading; 

local db;

local Up={};
local Down={};
local Max;
local Last;
local Id;

local TheMin,  TheMax;
-- Routine
 function Prepare(nameOnly)   

    source = instance.source;
    first = source:first();
	Type= instance.parameters.Type; 
	LabelSize= instance.parameters.LabelSize;
	Id= instance.parameters.Id;
	
    local name = profile:id() .. "(" ..  instance.source:name()  .. ")";
    instance:name(name); 


    if   (nameOnly) then
        return;
    end
	
	
	Max=0;

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

	TF= instance.parameters.TF;

--TF	
	local s1, e1, s2, e2;
    s1, e1 = core.getcandle(source:barSize(), offset, weekoffset);  
    s2, e2 = core.getcandle(TF, offset, weekoffset);
    assert((e2 - s2) >=(e1 - s1), "The chosen time frame must be longer than the source time frame");
	   

    BoxSize = instance.parameters.BoxSize;
	Long = instance.parameters.Long;
	Short = instance.parameters.Short;
 
 
    source = instance.source;
	
 	Source = core.host:execute("getSyncHistory", source:instrument(), "m1", source:isBid(), 300, 200, 100);
	loading=true;  	
 
   instance:setLabelColor(Long);
   instance:ownerDrawn(true); 
   
   
   -- min = instance:addInternalStream(0, 0);
    --max = instance:addInternalStream(0, 0);  
   
   	require("storagedb")
	db = storagedb.get_db(Id)
   
end


local init = false; 
 
function Draw (stage, context)

    if stage  ~= 2 then
	return;
	end		
	
    if loading   then
	return;
	end	
	
	 
 
 
	if not init then
	init=true;
	context:createPen (1, 1, 1, Long);
	context:createSolidBrush (2, Long);
	
	context:createPen (3, 1, 1, Short);
	context:createSolidBrush (4, Short);
	Transparency= context:convertTransparency (instance.parameters.transparency)
	context:createPen (15, core.LINE_DOT, 1,  instance.parameters.Line_Color)
	end
	
	

 	
	context:createFont (10, "Arial",(context:priceWidth (0, BoxSize*source:pipSize())/100)*LabelSize,  (context:priceWidth (0, BoxSize*source:pipSize())/100)*LabelSize, 0);
	


	AddPeriod( context);


end	 

function AddPeriod(context) 

local period =Source:size()-1;

local from, to = core.getcandle(TF, Source:date(period), offset, weekoffset); 
local x, x1, x2 = context:positionOfDate (from);
 
if Max == nil then
return;
end
   
X1, o, o = context:positionOfDate (from);
X2, o, o = context:positionOfDate (to);

NumberOfPoints=(X2-X1)/Max;

context:drawLine (15, x, context:top() , x, context:bottom(), 0)

 

local ShiftX, ShiftY  = context:measureText (10, "X", 0);	 
    
		local Box= context:priceWidth (0, BoxSize*source:pipSize());
	    local Start={};

 
		
 
  	
 
							 for k, v in pairs(Down) do
									visible, y1 = context:pointOfPrice (k * source:pipSize());
				 
				 

									length = v * NumberOfPoints; 
						
									
									if Type== "Consolidated" then		
											
										
										x1= x;
										x2=x+ length;			
										Start[k]=x2 ;	 
								
									end
									 if   Type== "Aligned" then
										 
										x1= x- length;
										x2=x;			
					 
									end  
									
									 
									 
									 context:drawRectangle (-1, 4, x1, y1 , x2, y1-Box,Transparency)
									
									width, height = context:measureText (10, v, 0);				
									context:drawText (10, v, Short, core.COLOR_BACKGROUND , x-ShiftX-width, y1-height, x-ShiftX, y1, 0);
					
									

									 
							end
				 
		
 		
		 
						for k, v in pairs(Up ) do
								visible, y1 = context:pointOfPrice (k * source:pipSize());
								y2 = y1;	
			  
								length =  v * NumberOfPoints; 
								max_length= NumberOfPoints

								if Type== "Consolidated" then

								if Start[k]== nil then
								Start[k]=x;
								end
								
								x1= Start[k] ;
								x2= Start[k]+length; 
								end					
								 if   Type== "Aligned" then
									 
									x1= x;
									x2=x+ length;			
				 
								end 
					 
							 
									 context:drawRectangle (-1, 2, x1, y1 , x2, y1-Box,Transparency)				 

							
								
								width, height = context:measureText (10, v, 0);				
								context:drawText (10, v, Long, core.COLOR_BACKGROUND , x+ShiftX, y1-height, x+ShiftX+width, y1, 0);

							 

					 
		 
		
    end
end		

local Init = false;

-- Indicator calculation routine
function Update(period)
  
	  
	  if  loading  then
	  return;
	  end
	  
if period < source:size()-1 then
return;
end


    local from, to = core.getcandle(TF, source:date(period), offset, weekoffset); 
	local S= core.findDate (Source, from, false);
	local E= core.findDate (Source, to, false);
	
	if E < 0 or S < 0 then
	return;
	end
		
	
	if Last~= S then
	Up={};
	Down={};
	Last= S; 
	
	
	Max=0;
	
	TheMin=math.huge;	
	TheMax=0;	
	
	end
	
	
    for i= S, E, 1 do	
	Loading(i);
    end	
	
	
	
 

end


function Loading(period)
		
    local from, to = core.getcandle("m1", Source:date(period), offset, weekoffset); 

   	local MinData, MaxData;
 
	
	
    MinData =tonumber( db:get(tostring("MinData" .. from ),0));	
    MaxData =tonumber( db:get(tostring("MaxData" .. from),0));			
	 
 
				
				if MaxData> TheMax then
				TheMax=MaxData;
				end
				if  MinData<TheMin and MinData~=0   then
				 TheMin=MinData;	
				end	
--Up, Down;
	   for Level=  MinData, MaxData, BoxSize do
	   
         local v1 = rawget(Up, Level);
         local v2 = rawget(Down, Level);		
		
			if v1 == nil then
				v1 = 0;--inivilizes the row to 0 , if the row was not set 
			end			
	 
			if v2 == nil then
				v2 = 0;--inivilizes the row to 0 , if the row was not set 
			end		
		
 	
			UpCount= db:get(tostring("Up" .. from ..  Level), 0)	 
			DownCount= db:get(tostring("Down" .. from ..  Level), 0)		 
			
		   rawset(Down, Level, DownCount + v2) 		
		   rawset(Up, Level, UpCount + v1) 	 
		   
		   if UpCount + v1 >  Max then
		   Max=UpCount + v1;
		   end
		   
		   if DownCount + v2 >  Max then
		   Max=DownCount + v2;
		   end
        end		
			
   	    core.host:execute("setStatus", TheMin.. ", "..  TheMax); 
	   
 

end

 



function AsyncOperationFinished(cookie, success, message)

	   
	    if cookie == 100 then
        loading = true;
        elseif cookie == 200 then
        loading = false;
        end
		 
	    if not loading    then
       -- instance:updateFrom(0);
		end
		
		return core.ASYNC_REDRAW ;
end