#!/usr/bin/env perl -l

use strict;
use warnings;
use autodie;

use constant INFO_LINES => 3;

use Text::CSV;

my $txt_in  = 'pm_1092407_txt_in.txt';
my $csv_out = 'pm_1092407_csv_out.csv';

cat_file($txt_in, 'INPUT');

my $csv = Text::CSV::->new;
open my $txt_in_fh, '<', $txt_in;
open my $csv_out_fh, '>', $csv_out;

my @captures;

while (<$txt_in_fh>) {
    chomp;
    push @captures, $_;

    unless ($. % INFO_LINES) {
        $csv->print($csv_out_fh, [@captures]);
        @captures = ();
    }
}

close $txt_in_fh;
close $csv_out_fh;

cat_file($csv_out, 'OUTPUT');

sub cat_file {
    my ($file, $prompt) = @_;
    $prompt = 'FILE' unless defined $prompt;

    print '=' x 64;
    print "$prompt ($file):";
    print '-' x 64;
    system cat => $file;
}