projet-programmation-imperative/src/pageRank.adb

with Ada.Text_IO; use Ada.Text_IO;
with Ada.Integer_Text_IO; use Ada.Integer_Text_IO;

with Ada.Command_Line;      use Ada.Command_Line;
with Ada.Strings.Unbounded; use Ada.Strings.Unbounded;


with Google_Naive;

procedure pageRank is
    
    Type T_Double is digits 6;
    ERROR_args: Exception;





    procedure get_args(filename: in out Unbounded_String;
                      ite_max: in out Natural;
                      alpha: in out Float;
                      naif: in out Boolean) is
        i: Natural := 1;
    begin
        
        put(Argument_Count, 1); new_line;
        for i in 1 .. Argument_Count loop
            Put("Argument");
            Put(i, 2);
            Put(": ");
            Put_line(Argument(i));
        end loop;

        -- on vérifie d'abord que le nombre d'arguments est cohérent
        if not(0 < Argument_Count and Argument_Count <= 6) then -- verif si double inégalité possible
            raise ERROR_args;
        else
            loop
                if Argument(i) = "-P" then
                    put_line("naif");
                    naif := True;
                    i := i + 1;
                elsif Argument(i) = "-A" then
                    put_line("alpha");
                    alpha := Float'Value(Argument(i+1));
                    i := i + 2;
                elsif Argument(i) = "-I" then
                    put_line("iteration");
                    ite_max := Natural'Value(Argument(i+1)); -- verif si les conversions sont bonnes
                    i := i + 2;
                elsif Argument(i)(Argument(i)'Last-3 .. Argument(i)'Last) = ".net" then -- verif les indexs
                    put_line("filename");
                    filename := To_Unbounded_String(Argument(i)(Argument(i)'First .. Argument(i)'Last-4));
                    i := i + 1;
                else
                    put_line("erreur");
                    raise ERROR_args;
                end if;
                exit when i > Argument_Count;
            end loop;
        end if;
    exception
        -- s'il y a un problème on arrête l'exectution et on affiche l'usage.
        when others =>
            put_line("Erreur lors de la saisi de la commande");
            put_line("Usage: pagerank [-I max_iterations] [-A alpha] [-P] fichier_reseau.net");
    end get_args;





    procedure algorithm_naif(N: in Positive;
                             file: in Ada.Text_IO.File_Type;
                             alpha: in Float;
                             ite_max: in Natural) is

        package Google is
            new Google_Naive(T_Element => T_Double, N => N);
        use Google;

        pi: T_Vecteur;
        G: T_Google;

    begin

        put_line("initialized pi");
        initialize(pi);

        put_line("start algo naif");
        create_H(G, file);
        put_line("created H");
        create_S(G);
        put_line("created S");
        create_G(G, alpha);
        put_line("created G");

        -- on applique l'algorithme itératif
        for i in 1..ite_max loop
            pi := pi * G;
        end loop;

        put(pi);
        put_line("end algo naif");
    
    end algorithm_naif;

    filename: Unbounded_String;
    ite_max: Natural := 150;
    naif: Boolean := False;
    alpha: Float := 0.85;

    N: Positive;

    file: Ada.Text_IO.File_Type;

begin

    get_args(filename, ite_max, alpha, naif);
    put_line("args OK");

    open(file, In_File, To_String(filename & ".net"));
    put_line("opened file");

    get(file, N); -- on récupère le nombre de pages
    put_line("got N");

    algorithm_naif(N, file, alpha, ite_max);

end pageRank;