use strict;
use warnings;
use Acme::MetaSyntactic;
use Getopt::Long;

my $usage = << 'EOT';
Usage: metafy [options] [from:]to [file]
Available options:
  --in-place     : force in-place edit (clobbers the old files)
  --force-random : force target words randomisation
  --help         : print this message and exit
  --version      : print version information and exit
  --themes       : print the list of themes and exit
  --verbose      : print the translations list afterwards

my %conf = (
    'force-random' => 0,
    verbose        => 0,
GetOptions( \%conf, 'version', 'themes', 'help', 'verbose|v', 'force-random',
  or die $usage;

# find out the themes name
die "No theme given\n\n$usage" unless @ARGV;
($conf{from}, $conf{to}) = split /:/, shift, 2;
$conf{to} = $conf{from} unless $conf{to};

# find the themes/categories
for my $t (qw( from to )) {
    my ($theme, $category) = split '/', $conf{$t}, 2;
    die "Theme '$theme' does not exist!\n\n"
      . "Available themes: @{[ Acme::MetaSyntactic->themes() ]}\n"
      unless Acme::MetaSyntactic->has_theme($theme);

   @conf{$t, "${t}_category"} = ($theme, $category);

# informative options
print STDERR
"metafy your files, using Acme::MetaSyntactic version $Acme::MetaSyntactic::VERSION\n"
  if $conf{version};
print STDERR $usage if $conf{help};
print map "$_\n", Acme::MetaSyntactic->themes if $conf{themes};
exit if $conf{themes} || $conf{version} || $conf{help};

# real processing starts here
my $from =
  Acme::MetaSyntactic->new( $conf{from}, category => $conf{from_category} );
my $to = Acme::MetaSyntactic->new( $conf{to}, category => $conf{to_category} );
my @to = $to->name(0);
my %to;

# find the origin list
my $re_from = qr/\b(@{[join'|', sort $from->name( 0 ) ]})\b/;

# modify files in place
$^I = '' if $conf{'in-place'};

# loop on the files
while(<>) {
        my $repl;
        if ( $conf{'force-random'} ) { push @{ $to{$1} }, $repl = $to->name() }
        else { $repl = $to{$1} ||= shift @to; @to = $to->name(0) if !@to }
continue { print }

if( $conf{verbose} ) {
    print STDERR "Translations:\n",
      ? map { "\t$_ => @{$to{$_}}\n" } sort keys %to
      : map { "\t$_ => $to{$_}\n" } sort keys %to;


=head1 NAME

metafy - Change the metasyntactic words in your text


B<metafy> [ I<--help> ] [ I<--version> ] [I<--force-random>]
[I<theme>[I</category>]:]I<theme>[I>category>] [ I<file> ... ]


B<metafy> filters any metasyntactic word and replace them with words from
any C<Acme::MetaSyntactic> theme. This script works as a filter or directly
modifies the files given on the command-line.

A few examples should make it easy to understand what it does and how
it works:

=over 4

=item *

Replace words from the C<foo> theme by words from the C<batman> theme:

    $ metafy foo:batman

=item *

Replace the French metasyntactic words by the classic English ones:
    $ metafy foo/fr:foo/en

=item *

Replace any word from the C<batman> theme by a random one from the
C<donmartin> theme. The replacement will be different every time:

    $ metafy --force-random batman:donmartin

=item *

Replace words from a theme by words from the same theme (for example if you
didn't like the first run):

   $ metafy batman

In other words, if C<from> is not given, it's the same as C<to>.

=item *

Modify a bunch of files in-place:

    $ metafy --in-place foo:batman *.c

There is currently no way to create backup files (like perl's I<-i> option


Each word from the original theme is replaced by the same word of the
target theme. However, if the target theme does not contain enough words
to map to the words from the original theme used in the file, then the
same words maybe used more than once. B<This may break programs!>

The option I<--force-random> will certainly break your stuff.


The following command-line options are available (and can all be abbreviated):

=head2 Metasyntactic options

=over 4

=item I<--force-random>

Compute the replacement for each word every time it's needed.
B<This will definitely break any program!>

=item I<--in-place>

Force in-place edition


=head2 Informative options

The program will exit if any of these options is selected.
However, these options can be combined.

=over 4

=item I<--themes>

Print the list of available themes.

=item I<--version>

Print version information.

=item I<--help>

Print a short help message.


=head1 AUTHOR

Philippe "BooK" Bruhat, C<< <book@cpan.org> >>.


Copyright 2006 Philippe 'BooK' Bruhat, All Rights Reserved.

=head1 LICENSE

This program is free software; you can redistribute it and/or modify it
under the same terms as Perl itself.