with Ada.text_IO; use Ada.text_IO;
with Pipe_Commands; use Pipe_Commands;
with Ada.Strings.Unbounded;             use Ada.Strings.Unbounded;
with unbounded_strings;                 use unbounded_strings;
with Ada.Strings; use Ada.Strings;
with Ada.Text_IO.Unbounded_IO; 		use Ada.Text_IO.Unbounded_IO;
with Ada.Directories; 			use Ada.Directories;
with task_clustering_rules; use task_clustering_rules;

package body Hypervolume_computation is

    procedure Normalize_Archive (arc : in arc_type) is

	--Znad1, Znad2                   : float;
        obj1_norm, obj2_norm           : float;
        F                              : Ada.Text_IO.File_Type;
        Data,line                      : unbounded_string;

    begin

        --if arclength > 1 then 
	
        	--Znad1   := arc(1).obj(1);
        	--Znad2   := arc(1).obj(2);
        	Z1_ideal := arc(1).obj(1);
        	Z2_ideal := arc(1).obj(2);

		for i in 2 .. arclength loop
			--if arc(i).obj(1) > Znad1 then
			--	Znad1 := arc(i).obj(1);
			--end if;

			if arc(i).obj(1) < Z1_ideal then
				Z1_ideal := arc(i).obj(1);
			end if;
		
			--if arc(i).obj(2) > Znad2 then
			--	Znad2 := arc(i).obj(2);
			--end if;

			if arc(i).obj(2) < Z2_ideal then
				Z2_ideal := arc(i).obj(2);
			end if;
		end loop;

           	for i in 1 .. arclength loop
			obj1_norm := (arc(i).obj(1) - Z1_ideal) / (Z1_anti_ideal - Z1_ideal);
			obj2_norm := (arc(i).obj(2) - Z2_ideal) / (Z2_anti_ideal - Z2_ideal);
                	Append (Data, obj1_norm'img & " " & obj2_norm'img & ASCII.LF);
        	end loop;

        --else 

        --	f1_norm := arc(1).obj(1);
	--	f2_norm := arc(1).obj(2);
        --        Append (Data, f1_norm'img & " " & f2_norm'img & ASCII.LF);
        --end if; 

	Create(F,Ada.Text_IO.Out_File,"Normalized_Archive_");
        Unbounded_IO.Put_Line(F, Data);
        Close(F);

    end Normalize_Archive;

    function Call_hv return float is
        
	FileStream : stream;
	--command    : constant string := "./../../../../../hv Normalized_Archive_ -s Hypervolume.txt";
        command    : constant string := "./../../../../../../required_packages/hypervolume/hv " 
                                        & "-r ""1.0 1.0"""
                                        & " Normalized_Archive_ -s Hypervolume.txt";
	F1         : Ada.Text_IO.File_Type;
	line       : unbounded_String;
	Buffer     : unbounded_String;  
    	
    begin

	FileStream := execute(command, read_file);
        loop
             begin
                Buffer := read_next(FileStream);
             exception
                when Pipe_Commands.End_of_file => 
                      exit;
             end;
        end loop;
             
        close(FileStream);

        Open(F1, Ada.Text_IO.In_File,"Normalized_Archive_Hypervolume.txt");
        line := To_Unbounded_String(get_line(F1));
        Put_Line ("The hypervolume =" & To_string(line));
        return float'Value(To_string(line));

    end Call_hv;

end Hypervolume_computation;