#!/usr/local/bin/perl

use warnings;
use strict;
use File::Copy qw/mv/;

sub get_og_files
{
	my @og_files;

	opendir(DIR, '.') or die $!;
	while (readdir(DIR)) {
		next if ($_ =~ m/^\./);
		push @og_files, $_;
	}
	closedir(DIR);
	return @og_files;
}

use constant {
	C_O	=> '',
};
sub unixize_file_names
{
	my @og_files = @_;
	my @new_files;

	foreach (@og_files) {
		if ($_ =~ /^[0-9]+\./) {
			$_ =~ s/\.//;
		}
		$_ =~ s/ - /_/g;
		$_ =~ s/ /_/g;
		$_ =~ s/c\+\+/cxx/g;
		$_ =~ s/C\+\+/CXX/g;
		$_ =~ s/[\x83\x84\x85\x86]/a/g; # âäàå
		$_ =~ s/[]/A/g; # ÄÅ
		$_ =~ s/\x91/ae/g; # æ
		$_ =~ s/\x92/AE/g; # Æ
		$_ =~ s/\x87/c/g; # ç
		$_ =~ s/\x80/C/g; # Ç
		$_ =~ s/[\x82\x88\x89\x8a]/e/g; # éêëè
		# $_ =~ s/[ÉÈÊË]/E/g;
		$_ =~ s/[\x8b\x8c\x8d]/i/g; # ïîì
		# $_ =~ s/[ÏÎÌ]/I/g;
		# $_ =~ s/[ôöò]/o/g;
		$_ =~ s/[\x93\x94\x95]/o/g; # ôöò
		# $_ =~ s/[ÿ]/y/g;
		$_ =~ s/ü/u/g;
		$_ =~ s/Ü/U/g;
		$_ =~ s/[^A-Za-z0-9\._]+//g;
		$_ = lc($_);
		push @new_files, $_;
	}
	return @new_files;
}

sub main
{
	my @og_files;
	my @new_files;
	my @files;

	@og_files = get_og_files();
	@new_files = unixize_file_names(@og_files);
	while (@og_files || @new_files) {
		$files[0] = shift @og_files;
		$files[1] = shift @new_files;
		if (@ARGV == 1 && $ARGV[0] eq '-R' && -d $files[0]) {
			chdir($files[0]) or die $!;
			main();
			chdir('../');
		}
		next if (-e $files[1]);
		# mv($files[0], $files[1]) or print STDERR $! . "\n";
		print "'". $files[0] . "' -> '" . $files[1] . "'\n";
	}
	return;
}

main();

__END__