#
# Copyright 2006 NetMesh Inc.
#
# Licensed under the Apache License, Version 2.0 (the "License");
# you may not use this file except in compliance with the License.
# You may obtain a copy of the License at
#
#     http://www.apache.org/licenses/LICENSE-2.0
#
# Unless required by applicable law or agreed to in writing, software
# distributed under the License is distributed on an "AS IS" BASIS,
# WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
# See the License for the specific language governing permissions and
# limitations under the License.

use overload;

#####
# Convert a hierarchic data structure into a string. Does not detect loops.

sub objectToString {
    my $obj    = shift; # object to convert to string
    my $indent = shift; # indentation level. Defaults to 0.

    $indent = 0 unless( defined( $indent ));
    return 'undef' unless( defined( $obj ));

    my $ret = '';

    my $strval = overload::StrVal( $obj );

    my ($realpack, $realtype, $id) = ($strval =~ /^(?:(.*)\=)?([^=]*)\(([^\(]*)\)$/);
    $realpack = '' unless( $realpack );
    $realtype = '' unless( $realtype );
    $id = '' unless( $id );

    if( $realpack eq "Math::BigInt" ) {
        $ret .= ref( $obj ) . " { ";
        $ret .= $obj->bstr;
        $ret .= " }";
    } elsif( $realtype eq "ARRAY" ) {
        $ret .= ref( $obj ) . " {\n";
        # check whether this is a pseudo-hash
        if( @{$obj} && overload::StrVal( @{$obj}[0] ) =~ m!^pseudohash=! ) {
            my $pseudo = @{$obj}[0];
            foreach my $k ( keys %{$pseudo} ) {
                $ret .= indent( $indent+1 );
                $ret .= sprintf( "%-32s => %s\n", $k, objectToString( @{$obj}[ $pseudo->{$k} ], $indent+1 ));
            }
        } else {
            foreach my $o ( @{$obj} ) {
                $ret .= indent( $indent+1 );
                if( ref( $o ) eq "HASH" || ref( $o ) eq "ARRAY" ) {
                    $ret .= objectToString( $o, $indent+1 ) . "\n";
                } else {
                    if( defined( $o )) {
                        $ret .= objectToString( $o, $indent+1 ) . "\n";
                    } else {
                        $ret .= "<<undef>>\n";
                    }
                }
            }
        }
        $ret .= indent( $indent ) . "}\n";

    } elsif( $realtype eq "HASH" ) {
        $ret .= ref( $obj ) . " {\n";
        foreach my $k ( keys %{$obj} ) {
            $ret .= indent( $indent+1 );
            $ret .= sprintf( "%-32s => %s\n", $k, objectToString( $obj->{$k}, $indent+1 ));
        }
        $ret .= indent( $indent ) . "}";
    } else {
        $ret .= $obj;
    }
    return $ret;
}

#####
# indent so many times
sub indent {
    my $indent = shift;

    $indent = 0 unless( defined( $indent ));
    my $ret = '';
    for( my $i=0 ; $i<$indent ; ++$i ) {
        $ret .= '    ';
    }
    return $ret;
}