with Schema.Decimal;    use Schema.Decimal;
with GNAT.IO;           use GNAT.IO;
with Schema.Validators; use Schema.Validators;

procedure TestNumbers is
   procedure Assert_Nan (Num : String);
   --  Check that Num is not a valid number

   procedure Assert (Num1, Num2 : String; Expected : Character);
   --  Compare two numbers

   ----------------
   -- Assert_Nan --
   ----------------

   procedure Assert_Nan (Num : String) is
      N : Arbitrary_Precision_Number;
      pragma Unreferenced (N);
   begin
      N := Value (Num);
      Put_Line (Num & " should not be authorized");
   exception
      when XML_Validation_Error =>
         null;
   end Assert_Nan;

   ------------
   -- Assert --
   ------------

   procedure Assert (Num1, Num2 : String; Expected : Character) is
   begin
      case Expected is
         when '<' =>
            if not (Value (Num1) < Value (Num2)) then
               Put_Line (Num1 & " < " & Num2);
            end if;
            if not (Value (Num2) > Value (Num1)) then
               Put_Line (Num2 & " > " & Num1);
            end if;

         when '=' =>
            if not (Value (Num1) = Value (Num2)) then
               Put_Line (Num1 & " = " & Num2);
            end if;

         when '>' =>
            if not (Value (Num1) > Value (Num2)) then
               Put_Line (Num1 & " > " & Num2);
            end if;
            if not (Value (Num2) < Value (Num1)) then
               Put_Line (Num2 & " < " & Num1);
            end if;

         when others =>
            Put_Line ("Unexpected comparision");
      end case;
   end Assert;

   Num_Invalid1 : constant String := "--23";
   Num_Invalid2 : constant String := "-23..";
   Num_Invalid3 : constant String := "2A24";
   Num_Invalid4 : constant String := "@234";
   Num_Invalid5 : constant String := "12E";
   Num_Invalid6 : constant String := "12E@23";

   Num1 : constant String := "1";
   Num2 : constant String := "10";
   Num3 : constant String := "1E-1";
   Num4 : constant String := "9e-1";
   Num5 : constant String := "-100E-2";
   Num6 : constant String := "-124.567E2";
   Num7 : constant String := "-12345.678E1";

   Num8 : constant String := "124.45E5";
   Num9 : constant String := "123.4";

begin
   Assert_Nan (Num_Invalid1);
   Assert_Nan (Num_Invalid2);
   Assert_Nan (Num_Invalid3);
   Assert_Nan (Num_Invalid4);
   Assert_Nan (Num_Invalid5);
   Assert_Nan (Num_Invalid6);

   Assert (Num1, Num2, '<');
   Assert (Num1, Num3, '>');
   Assert (Num1, Num4, '>');
   Assert (Num1, Num5, '>');
   Assert (Num6, Num7, '>');

   Check_Digits (Value (Num8), Fraction_Digits => 0, Total_Digits => 9);
   Check_Digits (Value (Num8), Fraction_Digits => 0, Total_Digits => 8);
   begin
      Check_Digits (Value (Num8), Fraction_Digits => 0, Total_Digits => 7);
      Put_Line ("Total_Digits=5 " & Num8);
   exception
      when XML_Validation_Error => null;
   end;

   Check_Digits (Value (Num9), Total_Digits => 5);
   Check_Digits (Value (Num9), Total_Digits => 4);
   begin
      Check_Digits (Value (Num9), Total_Digits => 3);
      Put_Line ("Total_Digits=3 " & Num9);
   exception
      when XML_Validation_Error => null;
   end;

   Check_Digits (Value (Num9), Fraction_Digits => 2);
   Check_Digits (Value (Num9), Fraction_Digits => 1);
   begin
      Check_Digits (Value (Num9), Fraction_Digits => 0);
      Put_Line ("Fraction_Digits=0 " & Num9);
   exception
      when XML_Validation_Error => null;
   end;

   Check_Digits (Value (Num8), Fraction_Digits => 1);
   Check_Digits (Value (Num8), Fraction_Digits => 0);
   Check_Digits (Value (Num6), Fraction_Digits => 1);
   begin
      Check_Digits (Value (Num6), Fraction_Digits => 0);
      Put_Line ("Fraction_Digits=0 " & Num6);
   exception
      when XML_Validation_Error => null;
   end;

end TestNumbers;