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use NativeCall;

# /usr/lib64/liblpsolve55.so

# lp_solve types in lp_types.h
#   REAL double -> raku: num64

class LPrec is repr('CPointer'){
    # has int32 $.alignmentspacer is rw;
    # has Str $.lp_name is rw;
    # has int32 $.rows;
    # has int32 $.columns;
    # ... lot's of other items to add (see lp_lib.h)

    # lprec *make_lp(int rows, int columns);
    sub make_lp(int32,int32) returns LPrec is native('lpsolve55') {*}
    # unsigned char set_add_rowmode(lprec *lp, unsigned char turnon);
    sub set_add_rowmode( LPrec, bool) is native('lpsolve55') {*}
    # unsigned char add_constraintex(lprec *lp, int count, REAL *row, int *colno, int constr_type, REAL rh);
    sub add_constraintex( LPrec, int32, num64 is rw, int32 is rw, int32, num64) is native('lpsolve55') {*}
    # unsigned char set_lp_name(lprec *lp, char *lpname);
    sub set_lp_name( LPrec, Str) returns bool is native('lpsolve55') {*}
    # char *get_lp_name(lprec *lp);
    sub get_lp_name( LPrec ) returns Str is native('lpsolve55') {*}

    method new (int32 $rows, int32 $columns) {
        my $lp = make_lp( $rows, $columns );
        set_add_rowmode( $lp, True);
        set_lp_name( $lp, "LP model");
        return $lp;
    }

    method addConstraintex ( Int $count, Int $row, Int $colno, Int $constr_type, Int $rh) {
        my int32 $v_count = $count;
        # say $v_count.WHICH;
        my num64 $v_row = $row.Num;
        my $pv_row = nativecast(Pointer[num64],$v_row);
        my int32 $v_colno = $colno;
        my int32 $v_constr_type = $constr_type;
        my num64 $v_rh = $rh.Num;
        # say $rhp.WHICH;
        say "Done";
        add_constraintex (self, $v_count, $pv_row, $v_colno, $v_constr_type, $v_rh );
        # add_constraintex (self, $v_count, Pointer[num64].new($v_row), Pointer[int32].new($v_colno), $v_constr_type, $v_rh );
    }

    method getLPName () {
        get_lp_name(self)
    }
}


my $lp = LPrec.new(0,2);
say $lp.getLPName();
$lp.addConstraintex(1,1,1,1,1);