# Copyright 1999-2012. Parallels IP Holdings GmbH. All Rights Reserved.
package Logging;

use strict;
use POSIX;
use Carp;
use File::Basename qw( dirname );
use File::Path qw( mkpath );
use XmlLogger;
use HelpFuncs;
use IO::Handle;

use vars qw|$verbosity $xmlLogger|;
$verbosity = 5;

my %handlerProc;

sub setXmlLogging {
  $xmlLogger = XmlLogger->new();
}

sub setVerbosity {
  $verbosity = shift;
}

sub getVerbosity {
  return $verbosity;
}

sub setOnError {
 $handlerProc{onerror} = shift;
}

sub setOnWarning {
 $handlerProc{onwarning} = shift;
}

my $outputHandle;
my $customHandle;

sub getOutputHandle {
  return $outputHandle;
}

sub setOutputHandle {
  $outputHandle = shift;
}

sub open {
  my ($dumpLogPath, $customLogPath) = @_;
  if (defined $dumpLogPath) {
     open $outputHandle, ">> $dumpLogPath";
     $outputHandle->autoflush(1); # disable output buffering
  }
  if ($customLogPath) {
    my $customLogDirPath = dirname($customLogPath);
    if (-e $customLogDirPath or mkpath($customLogDirPath)) {
       open $customHandle, ">> $customLogPath";
       $customHandle->autoflush(1); # disable output buffering
    }
  }
}

sub close {
  close $outputHandle if defined $outputHandle;
  close $customHandle if defined $customHandle;
}

sub date {
  return "[".$$."]: ".POSIX::strftime("%F %T", gmtime(time()));
}

sub _getMessage {
  my ($marker, $uuid, $message, $code) = @_;
  my $msg = date(). " $marker ";
  $msg .= "$uuid " if defined($uuid);
  $msg .= $message;
  if ( defined $code ) {
    if (( $code eq 'assert') || ($code eq 'fatal')) {
      #local $Carp::CarpLevel = +1;
      $msg .= ": \n" . Carp::longmess();
    }
  }
  $msg .= "\n";
  return $msg;
}

sub _writeMessage {
  my ($message) = @_;
  if ($outputHandle) {
    print $outputHandle ($message);
  } else {
    print STDERR ($message);
  }
  print $customHandle ($message) if ($customHandle);
}

sub error {
  my $uuid = HelpFuncs::generateUuid();
  if ( $verbosity > 0 ) {
    _writeMessage(_getMessage('ERROR',$uuid, @_));
  }
  __addXmlMessage('error',$uuid, @_);
  $handlerProc{onerror}->( @_ ) if exists $handlerProc{onerror} and ref $handlerProc{onerror} eq 'CODE';
}

sub warning {
  my $uuid = HelpFuncs::generateUuid();
  if ( $verbosity > 1) {
    _writeMessage(_getMessage('WARN',$uuid, @_));
  }
  __addXmlMessage('warning',$uuid, @_);
  $handlerProc{onwarning}->( @_ ) if exists $handlerProc{onwarning} and ref $handlerProc{onwarning} eq 'CODE';
}

sub info {
  my $uuid = HelpFuncs::generateUuid();
  if ( $verbosity > 2) {
    _writeMessage(_getMessage('INFO',$uuid, @_));
  }
  __addXmlMessage('info',$uuid, @_);
  $handlerProc{oninfo}->( @_ ) if exists $handlerProc{oninfo} and ref $handlerProc{oninfo} eq 'CODE';
}

sub debug {
  if ( $verbosity > 3) {
    _writeMessage(_getMessage('DEBUG',undef, @_));
  }
}

sub trace {
  if ( $verbosity > 4) {
    _writeMessage(_getMessage('TRACE',undef, @_));
  }
}

sub beginObject {
  my ( $type, $name, $uuid ) = @_;
  if( ref($xmlLogger) =~ /XmlLogger/ ) {
    $xmlLogger->beginObject( $type, $name, $uuid );
  }
}

sub endObject {
  if( ref($xmlLogger) =~ /XmlLogger/ ) {
    $xmlLogger->endObject();
  }
}

sub __addXmlMessage {
  if( ref($xmlLogger) =~ /XmlLogger/ ) {
    $xmlLogger->addMessage( @_);
  }
}

sub serializeXmlLog {
  my ($filename) = @_;
  if( ref($xmlLogger) =~ /XmlLogger/ ) {
    $xmlLogger->serializeToFile( $filename, 1);
  }
}


1;
