#!/usr/bin/perl

use lib "/usr/share/BackupPC/lib";
use BackupPC::Lib;
use BackupPC::CGI::Lib;
use POSIX;
use JSON;

# We need to switch to backuppc UID/GID
my $uid = getuid();
my $gid = getgid();
my (undef,undef,$bkpuid,$bkpgid) = getpwnam('backuppc');
setuid($bkpuid) if ($uid ne $bkpuid);
setgid($bkpgid) if ($gid ne $bkpgid);

my $host = $ARGV[0];
my $what = $ARGV[1];

my $bpc = BackupPC::Lib->new();

my @backups = $bpc->BackupInfoRead($host);
my $mainConf = $bpc->ConfigDataRead();
my $hostConf = $bpc->ConfigDataRead($host);
my $conf = { %$mainConf, %$hostConf };
my $fullCnt = $incrCnt = 0;
my $fullAge = $incrAge = $lastAge = -1;
my $lastXferErrors = 0;
my $maxErrors = 0;

if ( @backups ) {
  for ( my $i = 0 ; $i < @backups ; $i++ ) {
    if ( $backups[$i]{type} eq "full" ) {
      $fullCnt++;
      if ( $fullAge < 0 || $backups[$i]{startTime} > $fullAge ) {
        $fullAge  = $backups[$i]{startTime};
        $fullSize = $backups[$i]{size};
        $fullDur  = $backups[$i]{endTime} - $backups[$i]{startTime};
      }
    } else {
      $incrCnt++;
      if ( $incrAge < 0 || $backups[$i]{startTime} > $incrAge ) {
        $incrAge = $backups[$i]{startTime};
      }
    }
  }
  if ( $fullAge > $incrAge && $fullAge >= 0 )  {
    $lastAge = $fullAge;
  } else {
    $lastAge = $incrAge;
  }
  if ( $lastAge < 0 ) {
    $lastAge = "";
  } else {
    $lastAge = sprintf("%.1f", (time - $lastAge) / (24 * 3600));
  }
  $lastXferErrors = $backups[@backups-1]{xferErrs};
  $lastSizeNew    = $backups[@backups-1]{sizeNew};
  $lastDuration   = $backups[@backups-1]{endTime} - $backups[@backups-1]{startTime};
  $lastType       = $backups[@backups-1]{type};
}

$maxErrors = $conf->{MaxXferError} if (defined $conf->{MaxXferError});

if ($what eq 'errors') {
  print $lastXferErrors;
} elsif ($what eq 'max_errors') {
  print $maxErrors;
} elsif ($what eq 'age') {
  print $lastAge;
} elsif ($what eq 'size') {
  print $fullSize;
} elsif ($what eq 'duration') {
  print $lastDuration;
} elsif ($what eq 'notify') {
  print $conf->{EMailNotifyOldBackupDays};
} elsif ($what eq 'all') {
  print to_json(
    {
      max_errors    => $maxErrors,
      last_age      => $lastAge,
      full_size     => $fullSize,
      new_size      => $lastSizeNew,
      full_duration => $fullDur,
      duration      => $lastDuration,
      last_type     => $lastType
    }
  );
} else {
  print<<"EOF";

Usage: $0 <host> [errors|age|size|duration|all]

EOF
}
exit(0);