#!/usr/bin/perl

use strict;
use warnings;

if ( ! defined $ARGV[0] ) {
	print "Need to pass dir\n";
	exit 1;
}

my $dir_path = shift(@ARGV);

if ( ! -d $dir_path ) {
	print "$dir_path doesnt look like a dir\n";
	exit 1;
}

my @info_files;
my @audio_files;

foreach my $file ( split("\n",`ls $dir_path`) ) {

	if ( $file =~ m/^(audio_[0-9]{2}.inf)/ ) {
		push(@info_files, $1);
	} elsif ( $file =~ m/^(audio_[0-9]{2}.wav)/ ) {
		push(@audio_files, $1);
	}

}

my %tracks_map;
@tracks_map{@audio_files} = @info_files;

sub sanitize_title($) {

	my $title = shift;
	my $san_title;
	open(my $fh, ">>", \$san_title) or die "Couldnt open $!\n";
	foreach my $char ( split("",$title) ) {
		if ( $char =~ m/[\'\"\:\,\.\&\(\)]/ ) {
			print $fh "";
		} elsif ( $char =~ m/\s/ ) {
			print $fh "_";
		} else {
			print $fh "$char";
		}
	}

	close $fh;
	return $san_title;

}

foreach my $audio_file ( sort keys %tracks_map ) {
	my $track_title = "null";
	foreach my $line ( split("\n", `cat $dir_path/$tracks_map{$audio_file}`) ) {
		if ( $line =~ m/^Tracktitle=\s+(.*)$/ ) {
			$track_title = sanitize_title($1);
		}
	}
	if ( $track_title eq "null" ) {
		print "Couldnt get title from $tracks_map{$audio_file}\n";
		exit 1;
	}
	#print "$audio_file -> $tracks_map{$audio_file} -> '$track_title'\n";
	$tracks_map{$audio_file} = $track_title;
}

foreach my $audio_file ( sort keys %tracks_map ) {

	my $filename;
	if ( $audio_file =~ m/^audio_([0-9]{2}).wav/ ) {
		$filename = $1 . "_" . $tracks_map{$audio_file} . ".wav";
	} else {
		print "could get track number\n";
		exit 1;
	}

	print "mv $dir_path/$audio_file $dir_path/$filename\n";
	system("mv $dir_path/$audio_file $dir_path/$filename") == 0
		or die "Failed to mv $audio_file\n";

}