#============================================================= -*-perl-*-
#
# BackupPC::CGI::Check package
#
# DESCRIPTION
#
#   This module implements the Check action for the CGI interface.
#
# AUTHOR
#   Heuze Florent  <heuzef@firewall-services.com>
#
#========================================================================
#
# Released October 2019 - firewall-services.com
#
#========================================================================

package BackupPC::CGI::Check;

use strict;
use lib "/usr/share/BackupPC/lib";
use BackupPC::Lib;
use BackupPC::CGI::Lib qw(:all);
use POSIX;
use Getopt::Long;
use Statistics::Descriptive;
use Data::Dumper;

sub action
{
    # Init
    my($str, $strNone, $strGood, $hostCntGood, $hostCntNone, $frequency, $header);

    $hostCntGood = $hostCntNone = 0;
    GetStatusInfo("hosts info");
    my $Privileged = CheckPermission();

    # Start loop
    foreach my $host ( GetUserHosts(1) ) {
        my($incrCnt, $incrAge, $reasonHilite,
           $lastAge, $lastAgeColor, $tempState, $tempReason, $lastXferErrors, $lastXferErrorsColor);
        my($shortErr);
        my @Backups = $bpc->BackupInfoRead($host);
        my $fullCnt = $incrCnt = 0;
        my $fullAge = $incrAge = $lastAge = -1;

        $bpc->ConfigRead($host);
        %Conf = $bpc->Conf();

        next if ( $Conf{XferMethod} eq "archive" );
        next if ( !$Privileged && !CheckPermission($host) );

        # Get frequency for this host
        if ( $Conf{IncrPeriod} < $Conf{FullPeriod} ) {
            $frequency = $Conf{IncrPeriod};
        } else {
          $frequency = $Conf{FullPeriod};
        }

        # Age
        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};
                }
            } elsif ( $Backups[$i]{type} eq "incr" ) {
                $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));
        }

        # Color for age
        if ( $lastAge < $frequency ) {
            $lastAgeColor = "MediumSeaGreen";
        } else {
          $lastAgeColor = "Tomato";
        }
        if ( $fullAge < 0 ) {
            $fullAge = "";
        } else {
            $fullAge = sprintf("%.1f", (time - $fullAge) / (24 * 3600));
        }
        if ( $incrAge < 0 ) {
            $incrAge = "";
        } else {
            $incrAge = sprintf("%.1f", (time - $incrAge) / (24 * 3600));
        }
        $incrAge = "&nbsp;" if ( $incrAge eq "" );
        # Color for errors
        $lastXferErrors = $Backups[@Backups-1]{xferErrs} if ( @Backups );
        if ( $lastXferErrors == 0 ) {
            $lastXferErrorsColor = "MediumSeaGreen";
        } else {
          $lastAgeColor = "Tomato";
        }

    $reasonHilite = $Conf{CgiStatusHilightColor}{$Status{$host}{reason}} || $Conf{CgiStatusHilightColor}{$Status{$host}{state}};

    # If Backup is disable
    if ( $Conf{BackupsDisable} == 1 ) {
      if ( $Status{$host}{state} ne "Status_backup_in_progress" && $Status{$host}{state} ne "Status_restore_in_progress" ) {
        $reasonHilite = $Conf{CgiStatusHilightColor}{Disabled_OnlyManualBackups};
        $tempState = "Disabled_OnlyManualBackups";
        $tempReason = "";
      } else {
        $tempState = $Status{$host}{state};
        $tempReason = $Status{$host}{reason};
      }
    } elsif ($Conf{BackupsDisable} == 2 ) {
        $reasonHilite = $Conf{CgiStatusHilightColor}{Disabled_AllBackupsDisabled};
        $tempState = "Disabled_AllBackupsDisabled";
        $tempReason = "";
    } else {
        $tempState = $Status{$host}{state};
        $tempReason = $Status{$host}{reason};
    }

    $reasonHilite = " bgcolor=\"$reasonHilite\"" if ( $reasonHilite ne "" );
    if ( $tempState ne "Status_backup_in_progress" && $tempState ne "Status_restore_in_progress" && $Conf{BackupsDisable} == 0 && $Status{$host}{error} ne "" ) {
      ($shortErr = $Status{$host}{error}) =~ s/(.{48}).*/$1.../;
      $shortErr = " ($shortErr)";
    }

    # Check Size Consistency
    my $bpc = BackupPC::Lib->new();
    my $mainConf = $bpc->ConfigDataRead();
    my $check = {};

    my $hostConf = $bpc->ConfigDataRead($host);
    my $conf = { %$mainConf, %$hostConf };
    my $age = -1;
    $check = {
      bkp             => 0,
      last_age        => 0,
      errors          => 0,
      new_size        => 0,
      new_size_avg    => 0,
      new_size_median => 0,
      new_size_q1     => 0,
      new_size_q3     => 0
    };

    my @bpc_info              = $bpc->BackupInfoRead($host);
    my $sizes                 = new Statistics::Descriptive::Full;

    if ( scalar( @bpc_info ) ){
      foreach my $backup ( @bpc_info ) {
        # Skip partial or active backups
        next if ( $backup->{type} !~ m/^full|incr$/ );
        # Push all the sizes in our data set to compute avg sizes
        # Exclude backup N°0 as it'll always have much more new data than normal backups
        $sizes->add_data($backup->{sizeNew}) unless ( $backup->{num} == 0 );
        $check->{bkp}++;
      }

      # Ignore the last backup if it's not full or incr (which means it's either partial or active)
      my $i = ( $bpc_info[-1]->{type} =~ m/^full|incr$/ ) ? -1 : -2;

      $check->{errors}           = $bpc_info[$i]->{xferErrs};
      $check->{new_size}         = $bpc_info[$i]->{sizeNew};
      $check->{new_size_avg}     = int $sizes->mean;
      $check->{new_size_median}  = int $sizes->median;
      $check->{new_size_q1}      = eval { int $sizes->quantile(1) } || 0;
      $check->{new_size_q3}      = eval { int $sizes->quantile(3) } || 0;
      $check->{age}              = time - $bpc_info[$i]->{startTime};
      $check->{last_age}         = sprintf("%.1f", ($check->{age}) / 84600);
    }

    # TOO BIG ?
    my $toobig = "1";
    if ( $check->{new_size} > ($check->{new_size_q3} + $check->{new_size_q3} - $check->{new_size_q1}) * 1.5 or $check->{new_size} > $check->{new_size_avg} * 6 ) {
      $toobig = "1";
      }
    else {
      $toobig = "0";
    }

    # TOO SMALL ?
    my $toosmall = "1";
    if ( $check->{new_size} < ($check->{new_size_q1} - $check->{new_size_q3} - $check->{new_size_q1}) * 1.5 or $check->{new_size} < $check->{new_size_avg} / 3 ) {
      $toosmall = "1";
      }
    else {
      $toosmall = "0";
    }

    my $sizeConsistency = "<strong>ANOMALOUS</strong>";
    my $sizeConsistencyColor = "Tomato";

    # Get result
    if ( $toobig or $toosmall ) {
      $sizeConsistency = "<strong>ANOMALOUS</strong>";
      $sizeConsistencyColor = "Tomato";
      }
    else {
      $sizeConsistency = "Normal";
      $sizeConsistencyColor = "MediumSeaGreen";
    }

    # Get URL for explore file
    my $browseFile = "?action=browse&host=$host";

    # Show summary
            $str = <<EOF;
    <tr$reasonHilite><td class="border">${HostLink($host)}</td>
        <td align="center" class="border" style="color:$lastAgeColor;">$lastAge <em>(Freq: $frequency)</em></td>
        <td align="center" class="border" style="color:$lastXferErrorsColor;">$lastXferErrors</td>
        <td align="center" class="border" style="color:$sizeConsistencyColor;">$sizeConsistency</td>
        <td align="center" class="border"><a href="$browseFile" target="_blank">Explore files ...</a></td>
EOF

    # Increment counter
    if ( @Backups == 0 ) {
        $hostCntNone++;
        $strNone .= $str;
    } else {
        $hostCntGood++;
        $strGood .= $str;
    }
    }
    # End loop

    # Time set
    my $now            = timeStamp2(time);
    my $DUlastTime     = timeStamp2($Info{DUlastValueTime});
    my $DUmaxTime      = timeStamp2($Info{DUDailyMaxTime});
    my $DUInodemaxTime = timeStamp2($Info{DUInodeDailyMaxTime});

    # Show header
    $header = <<EOF;
    \${h1(qq{BackupPC: Check})}
    <p>This check was generated at <strong>\$now</strong>.</p>

    <p>File system pool size usage (\$DUmaxTime) :</p>
    <div style="background-color:#f1f1f1!important">
      <div style="color:#fff!important;background-color:#2196F3!important; text-align:center; width:\$Info{DUDailyMax}%">\$Info{DUDailyMax}%</div>
    </div>

    <p>File system inode size usage (\$DUInodemaxTime) :</p>
    <div style="background-color:#f1f1f1!important">
      <div style="color:#fff!important;background-color:#2196F3!important; text-align:center; width:\$Info{DUInodeDailyMax}%">\$Info{DUInodeDailyMax}%</div>
    </div>

    \${h2("Backups summary")}

    <table class="sortable" id="host_summary_backups" border cellpadding="3" cellspacing="1">
    <tr class="tableheader"><td> Host </td>
        <td> Last backup in days </td>
        <td> Errors </td>
        <td> Size Consistency </td>
        <td> Browse </td>
    \$strGood
    </table>
EOF

    # Show page
    my $content = eval ("qq{$header}");
    Header("BackupPC: Check", $content);
    Trailer();
}

1;