#!/usr/bin/perl
#
# <@LICENSE>
# Licensed to the Apache Software Foundation (ASF) under one or more
# contributor license agreements.  See the NOTICE file distributed with
# this work for additional information regarding copyright ownership.
# The ASF licenses this file to you under the Apache License, Version 2.0
# (the "License"); you may not use this file except in compliance with
# the License.  You may obtain a copy of the License at:
# 
#     http://www.apache.org/licenses/LICENSE-2.0
# 
# Unless required by applicable law or agreed to in writing, software
# distributed under the License is distributed on an "AS IS" BASIS,
# WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
# See the License for the specific language governing permissions and
# limitations under the License.
# </@LICENSE>

use MLDBM qw(DB_File Storable);
use POSIX qw(strftime);

my %Files = (
    db_hash => '/etc/mail/spamassassin/FuzzyOcr.db',
    db_safe => '/etc/mail/spamassassin/FuzzyOcr.safe.db',
    );

my %Stats = ();

#Days
my $diff = shift @ARGV || 0;
my $gctr = shift @ARGV || 5;
my $time = time;
my $days = int($time/86400) - $diff;

foreach my $f (keys %Files) {
    my %DB; my $err = 0;
    tie %DB, 'MLDBM', $Files{$f} or ++$err;
    next if $err; my @Top = ();
    foreach my $k (keys %DB) {
        my $db = $DB{$k};
        $Stats{$f}{'images'}++;
        $Stats{$f}{'score'} += $db->{score};
        if (int($db->{check}/86400) == $days) {
            $Stats{$f}{'today'}++;
            $Stats{$f}{'score2'} += $db->{score};
            my @basic = split(':',$db->{basic});
            my $line;
            if ($db->{score}) {
                $line = sprintf "%5d Time(s) -> %8.3f %9d %dx%dx%d"
                    ,$db->{match}+1,$db->{score},@basic;
            } else {
                $line = sprintf "%5d Time(s) -> %9d %dx%dx%d"
                    ,$db->{match}+1,@basic;
            }
            foreach my $t (qw/fname ctype/) {
                $line .= sprintf ' %s',$db->{$t} if defined $db->{$t};
            }
            push @Top,$line;
        }
        $Stats{$f}{'oldest'} = $db->{input}
            unless $Stats{$f}{'oldest'};
        $Stats{$f}{'oldest'} = $db->{input}
            if ($Stats{$f}{'oldest'} > $db->{input});
    }
    my $s = $Stats{$f};
    next unless $$s{'images'};

    my $p1 = sprintf "%6.2f%%",$$s{'today'}/($$s{'images'}/100);
    my $p2 = sprintf "%12.2f",$$s{'score'}/$$s{'images'} if ($$s{'images'});
    my $p3 = sprintf "%12.2f",$$s{'score2'}/$$s{'today'} if ($$s{'today'});

    my @stat = stat($Files{$f});
    printf "\n<<%s>>\n",$f;
    printf "File Size    : %9d Bytes\n",$stat[7];
    printf "File Name    : %s\n",$Files{$f};
    printf "Oldest Hash  : %s\n",scalar(localtime($$s{'oldest'}));
    printf "Average Score: %s\n",$p2 if ($$s{'score'});
    printf "Images in DB : %9d\n",$$s{'images'};
    printf "\n%s\n",strftime("%a, %b %d, %Y",localtime($time));
    printf "Matched   : %9d [%s]\n",$$s{'today'},$p1;
    printf "Avg. Score: %s\n",$p3 if ($$s{'score2'});
    my $count = $gctr;
    foreach (reverse sort @Top) {
        printf "%s\n",$_;
        last if (--$count == 0);
    }
}