-- More information about this indicator can be found at:
-- https://fxcodebase.com/code/viewtopic.php?f=17&t=71863

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-- Indicator profile initialization routine
-- Defines indicator profile properties and indicator parameters
-- TODO: Add minimal and maximal value of numeric parameters and default color of the streams
function Init()
    indicator:name("Week of month");
    indicator:description("");
    indicator:requiredSource(core.Bar);
    indicator:type(core.Oscillator);
	
	indicator.parameters:addGroup("Calculation");
	indicator.parameters:addBoolean("Exact", "Exact value", "Exact value", true);
    indicator.parameters:addGroup("Line Style");	
    indicator.parameters:addInteger("width", "Line width", "", 1, 1, 5);
    indicator.parameters:addInteger("style", "Line style", "", core.LINE_SOLID);
    indicator.parameters:setFlag("style", core.FLAG_LINE_STYLE);
	
	 indicator.parameters:addColor("color", "Line Color", "", core.rgb(0, 0, 255)); 

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 first;
local source = nil; 
local Indicator;
local Exact;	
-- Routine
 function Prepare(nameOnly)   
  
	source = instance.source
 
    local name = profile:id() .. "(" ..  instance.source:name()   .. ")";
    instance:name(name); 
	
	Exact= instance.parameters.Exact;


    if   (nameOnly) then
        return;
    end
 
	first=source:first() ; 
	 
    Line = instance:addStream("Line", core.Line, name, "Line", instance.parameters.color, first );
    Line:setPrecision(math.max(2, instance.source:getPrecision()));
    Line:setWidth(instance.parameters.width);
    Line:setStyle(instance.parameters.style);
    Line:addLevel(0);	
 
end


function Update(period, mode)

	 if period < first then
	 return;
	 end

     local date2 = core.dateToTable (source:date(period));	 
     local date1 =core.date (date2.year, date2.month, 1);
 

	 
    

	Line[period]= source:date(period)-date1;
	if Exact then
	Line[period]=math.floor(Line[period] / 7) + 1;
	end
	
end