Create a pie chart using GTL

[IdrissaO]

Hello, I am trying to use GTL to create a pie chart that presents the reason (reason_call) calls a standard in a health center.the graph is published on a web portal. We would like that when the user moves the cursor on a pie, a tooltip displays the reason for the call (reason_call), the frequency of the reason (number_reason_call) and the proportion (pct_reason_call).
I try to use the DISCRETEATTRMAP statement to make sure that the different reasons retain the same colors over time and regardless of the user. The problem is that the reason_call variable has too many modalities and from one day to another this can vary (the update is done daily). so I have trouble using the DISCRETEATTRMAP statement ca not being able to list all the reasons.
I would like a graph like the one below with the same legend
I manage to create the pie chart. But I have trouble customizing the colors, tips and caption.

Voici le programme

data data4pieChart;
	length raison_legend $ 60; /* over-sized, but that is harmless */
	set Mydata;

		raison_legend=strip(reason_call)||" (N = "||strip(number_reason_call)||", p = "||strip(pct_reason_call)|| " %)" ;
		rpt='title="' || trim(left("RaisonLabel")) ||' : ' || '09'x || trim(left(raison_m)) ||
						'0D'x || trim(left("NumberLabel")) ||' : ' || '09'x || trim(left(put(number_reason_call,NumberFmt.))) ||
						'0D'x || trim(left("PctLabel")) ||' : ' || '09'x || trim(left(pct_reason_call)) || " %" ||'"';		
run;



proc template;
	define statgraph piechart;
		begingraph;/*
			discreteattrmap name="piecolors";
				???
			enddiscreteattrmap;*/
			*discreteattrvar attrvar=reason_call_mapped var=reason_call attrmap="piecolors";
			layout region ;
				piechart category=reason_call  response=number_reason_call/ 
					tip=(reason_call number_reason_call pct_reason_call) 
					tipformat =($RaisonFmt. NumberFmt. z5.1)
					tiplabel=("RaisonLabel" "NumberLabel" "PctLabel")							
					datalabelcontent=(category)
					start=0 
					categorydirection=clockwise  
					datalabellocation=callout 
					otherslice=false ;
				
				discretelegend "piechart" / 
					location=outside 
					halign=right 
					valign=center
					border=false  
					across=1;
	
			endlayout;
		endgraph;
	end;
run;

[JosvanderVelden]

Have a look at the example:

discreteattrmap name="piecolors";
  value "F" / fillattrs=(color=pink);
  value "M" / fillattrs=(color=light_blue);
enddiscreteattrmap;

For documentation see: https://documentation.sas.com/doc/en/pgmsascdc/9.4_3.5/grstatproc/p1jzx3nmuupe74n1qy54onbwjoem.htm