#!/usr/bin/perl -w

use Text::ParseWords; 

use strict;

my (@lines, @fields, @rules, @date, @time, @rearranged);
my ($item, $date, $time, $rule);
my %count;

if($#ARGV <0) { 
print "usage: cpruleauditor <CheckPoint CSV File> \n";
exit 0;
} 

my $log = $ARGV[0];

open (LOGFILE, "$log") || die "Could not open file: $! \n";
@lines = <LOGFILE>;
close (LOGFILE);

my $header = $lines[0]; 

@fields = quotewords(";",0,$header);

my $count = 0;

validate();

print "Processing file.....please be patient \n\n";

my $value;

foreach $value (@fields) {
if ($value =~ /rule/) {
$rule = $count;
}
if ($value =~ /date/) {
$date = $count;
}
if ($value =~ /time/) {
$time = $count;
}
$count++;
}

shift @lines;

foreach $item (@lines) {
@fields = quotewords(";",0,$item);
unless ($fields[$rule] lt 1  ) { 
push (@rules, $fields[$rule]);
}
push (@date, $fields[$date]);
push (@time, $fields[$time]);
}

my $enddate = @date - 1;
my $endtime = @time - 1;

print "The log file covers the period \n";
print "$date[0] $time[0] to $date[$enddate] $time[$endtime] \n\n";

count_rules(@rules);

@rearranged = sort{$a <=> $b} keys %count;

foreach (@rearranged) {
print "rule number \t $_ \t appears \t $count{$_} \t time(s) \n";
}

sub validate {
if ($fields[0] !~ /num/) {
print "The file specified does not appear to be a valid CheckPoint CSV file \n";
exit 0;
}
}

sub count_rules {
map { $count{$_}++ }  @rules;
return %count;
}