# --
# Kernel/System/Stats/Dynamic/TicketAccountedTime.pm - stats for accounted ticket time
# Copyright (C) 2001-2009 OTRS AG, http://otrs.org/
# --
# $Id: TicketAccountedTime.pm,v 1.9 2009/11/26 10:37:29 bes Exp $
# --
# This software comes with ABSOLUTELY NO WARRANTY. For details, see
# the enclosed file COPYING for license information (AGPL). If you
# did not receive this file, see http://www.gnu.org/licenses/agpl.txt.
# --

package Kernel::System::Stats::Dynamic::TicketAccountedTime;

use strict;
use warnings;

use Kernel::System::Queue;
use Kernel::System::Service;
use Kernel::System::SLA;
use Kernel::System::Ticket;
use Kernel::System::Type;

use vars qw($VERSION);
$VERSION = qw($Revision: 1.9 $) [1];

sub new {
    my ( $Type, %Param ) = @_;

    # allocate new hash for object
    my $Self = {};
    bless( $Self, $Type );

    # check needed objects
    for my $Object (
        qw(DBObject ConfigObject LogObject UserObject TimeObject MainObject EncodeObject)
        )
    {
        $Self->{$Object} = $Param{$Object} || die "Got no $Object!";
    }
    $Self->{QueueObject}    = Kernel::System::Queue->new( %{$Self} );
    $Self->{TicketObject}   = Kernel::System::Ticket->new( %{$Self} );
    $Self->{StateObject}    = Kernel::System::State->new( %{$Self} );
    $Self->{PriorityObject} = Kernel::System::Priority->new( %{$Self} );
    $Self->{LockObject}     = Kernel::System::Lock->new( %{$Self} );
    $Self->{CustomerUser}   = Kernel::System::CustomerUser->new( %{$Self} );
    $Self->{ServiceObject}  = Kernel::System::Service->new( %{$Self} );
    $Self->{SLAObject}      = Kernel::System::SLA->new( %{$Self} );
    $Self->{TypeObject}     = Kernel::System::Type->new( %{$Self} );

    return $Self;
}

sub GetObjectName {
    my ( $Self, %Param ) = @_;

    return 'TicketAccountedTime';
}

sub GetObjectAttributes {
    my ( $Self, %Param ) = @_;

    # get user list
    my %UserList = $Self->{UserObject}->UserList(
        Type  => 'Long',
        Valid => 0,
    );

    # get state list
    my %StateList = $Self->{StateObject}->StateList(
        UserID => 1,
    );

    # get state type list
    my %StateTypeList = $Self->{StateObject}->StateTypeList(
        UserID => 1,
    );

    # get queue list
    my %QueueList = $Self->{QueueObject}->GetAllQueues();

    # get priority list
    my %PriorityList = $Self->{PriorityObject}->PriorityList(
        UserID => 1,
    );

    # get lock list
    my %LockList = $Self->{LockObject}->LockList(
        UserID => 1,
    );

    my @ObjectAttributes = (
        {
            Name             => 'Evaluation by',
            UseAsXvalue      => 1,
            UseAsValueSeries => 0,
            UseAsRestriction => 1,
            Element          => 'KindsOfReporting',
            Block            => 'MultiSelectField',
            Translation      => 1,
            Sort             => 'IndividualKey',
            SortIndividual   => $Self->_SortedKindsOfReporting(),
            Values           => $Self->_KindsOfReporting(),
        },
        {
            Name             => 'Queue',
            UseAsXvalue      => 1,
            UseAsValueSeries => 1,
            UseAsRestriction => 1,
            Element          => 'QueueIDs',
            Block            => 'MultiSelectField',
            Translation      => 0,
            Values           => \%QueueList,
        },
        {
            Name             => 'State',
            UseAsXvalue      => 1,
            UseAsValueSeries => 1,
            UseAsRestriction => 1,
            Element          => 'StateIDs',
            Block            => 'MultiSelectField',
            Values           => \%StateList,
        },
        {
            Name             => 'State Type',
            UseAsXvalue      => 1,
            UseAsValueSeries => 1,
            UseAsRestriction => 1,
            Element          => 'StateTypeIDs',
            Block            => 'MultiSelectField',
            Values           => \%StateTypeList,
        },
        {
            Name             => 'Priority',
            UseAsXvalue      => 1,
            UseAsValueSeries => 1,
            UseAsRestriction => 1,
            Element          => 'PriorityIDs',
            Block            => 'MultiSelectField',
            Values           => \%PriorityList,
        },
        {
            Name             => 'Created in Queue',
            UseAsXvalue      => 1,
            UseAsValueSeries => 1,
            UseAsRestriction => 1,
            Element          => 'CreatedQueueIDs',
            Block            => 'MultiSelectField',
            Translation      => 0,
            Values           => \%QueueList,
        },
        {
            Name             => 'Created Priority',
            UseAsXvalue      => 1,
            UseAsValueSeries => 1,
            UseAsRestriction => 1,
            Element          => 'CreatedPriorityIDs',
            Block            => 'MultiSelectField',
            Values           => \%PriorityList,
        },
        {
            Name             => 'Created State',
            UseAsXvalue      => 1,
            UseAsValueSeries => 1,
            UseAsRestriction => 1,
            Element          => 'CreatedStateIDs',
            Block            => 'MultiSelectField',
            Values           => \%StateList,
        },
        {
            Name             => 'Lock',
            UseAsXvalue      => 1,
            UseAsValueSeries => 1,
            UseAsRestriction => 1,
            Element          => 'LockIDs',
            Block            => 'MultiSelectField',
            Values           => \%LockList,
        },
        {
            Name             => 'Title',
            UseAsXvalue      => 0,
            UseAsValueSeries => 0,
            UseAsRestriction => 1,
            Element          => 'Title',
            Block            => 'InputField',
        },
        {
            Name             => 'CustomerUserLogin',
            UseAsXvalue      => 0,
            UseAsValueSeries => 0,
            UseAsRestriction => 1,
            Element          => 'CustomerUserLogin',
            Block            => 'InputField',
        },
        {
            Name             => 'From',
            UseAsXvalue      => 0,
            UseAsValueSeries => 0,
            UseAsRestriction => 1,
            Element          => 'From',
            Block            => 'InputField',
        },
        {
            Name             => 'To',
            UseAsXvalue      => 0,
            UseAsValueSeries => 0,
            UseAsRestriction => 1,
            Element          => 'To',
            Block            => 'InputField',
        },
        {
            Name             => 'Cc',
            UseAsXvalue      => 0,
            UseAsValueSeries => 0,
            UseAsRestriction => 1,
            Element          => 'Cc',
            Block            => 'InputField',
        },
        {
            Name             => 'Subject',
            UseAsXvalue      => 0,
            UseAsValueSeries => 0,
            UseAsRestriction => 1,
            Element          => 'Subject',
            Block            => 'InputField',
        },
        {
            Name             => 'Text',
            UseAsXvalue      => 0,
            UseAsValueSeries => 0,
            UseAsRestriction => 1,
            Element          => 'Body',
            Block            => 'InputField',
        },
        {
            Name             => 'Ticket/Article Accounted Time',
            UseAsXvalue      => 1,
            UseAsValueSeries => 1,
            UseAsRestriction => 1,
            Element          => 'ArticleAccountedTime',
            TimePeriodFormat => 'DateInputFormat',                 # 'DateInputFormatLong',
            Block            => 'Time',
            Values           => {
                TimeStart => 'ArticleAccountedTimeNewerDate',
                TimeStop  => 'ArticleAccountedTimeOlderDate',
            },
        },
        {
            Name             => 'Ticket Create Time',
            UseAsXvalue      => 1,
            UseAsValueSeries => 1,
            UseAsRestriction => 1,
            Element          => 'CreateTime',
            TimePeriodFormat => 'DateInputFormat',      # 'DateInputFormatLong',
            Block            => 'Time',
            Values           => {
                TimeStart => 'TicketCreateTimeNewerDate',
                TimeStop  => 'TicketCreateTimeOlderDate',
            },
        },
        {
            Name             => 'Ticket Close Time',
            UseAsXvalue      => 1,
            UseAsValueSeries => 1,
            UseAsRestriction => 1,
            Element          => 'CloseTime2',
            TimePeriodFormat => 'DateInputFormat',     # 'DateInputFormatLong',
            Block            => 'Time',
            Values           => {
                TimeStart => 'TicketCloseTimeNewerDate',
                TimeStop  => 'TicketCloseTimeOlderDate',
            },
        },
        {
            Name             => 'Escalation',
            UseAsXvalue      => 1,
            UseAsValueSeries => 1,
            UseAsRestriction => 1,
            Element          => 'EscalationTime',
            TimePeriodFormat => 'DateInputFormatLong',    # 'DateInputFormat',
            Block            => 'Time',
            Values           => {
                TimeStart => 'TicketEscalationTimeNewerDate',
                TimeStop  => 'TicketEscalationTimeOlderDate',
            },
        },
        {
            Name             => 'Escalation - First Response Time',
            UseAsXvalue      => 1,
            UseAsValueSeries => 1,
            UseAsRestriction => 1,
            Element          => 'EscalationResponseTime',
            TimePeriodFormat => 'DateInputFormatLong',                # 'DateInputFormat',
            Block            => 'Time',
            Values           => {
                TimeStart => 'TicketEscalationResponseTimeNewerDate',
                TimeStop  => 'TicketEscalationResponseTimeOlderDate',
            },
        },
        {
            Name             => 'Escalation - Update Time',
            UseAsXvalue      => 1,
            UseAsValueSeries => 1,
            UseAsRestriction => 1,
            Element          => 'EscalationUpdateTime',
            TimePeriodFormat => 'DateInputFormatLong',        # 'DateInputFormat',
            Block            => 'Time',
            Values           => {
                TimeStart => 'TicketEscalationUpdateTimeNewerDate',
                TimeStop  => 'TicketEscalationUpdateTimeOlderDate',
            },
        },
        {
            Name             => 'Escalation - Solution Time',
            UseAsXvalue      => 1,
            UseAsValueSeries => 1,
            UseAsRestriction => 1,
            Element          => 'EscalationSolutionTime',
            TimePeriodFormat => 'DateInputFormatLong',          # 'DateInputFormat',
            Block            => 'Time',
            Values           => {
                TimeStart => 'TicketEscalationSolutionTimeNewerDate',
                TimeStop  => 'TicketEscalationSolutionTimeOlderDate',
            },
        },
    );

    if ( $Self->{ConfigObject}->Get('Ticket::Service') ) {

        # get service list
        my %Service = $Self->{ServiceObject}->ServiceList(
            UserID => 1,
        );

        # get sla list
        my %SLA = $Self->{SLAObject}->SLAList(
            UserID => 1,
        );

        my @ObjectAttributeAdd = (
            {
                Name             => 'Service',
                UseAsXvalue      => 1,
                UseAsValueSeries => 1,
                UseAsRestriction => 1,
                Element          => 'ServiceIDs',
                Block            => 'MultiSelectField',
                Translation      => 0,
                Values           => \%Service,
            },
            {
                Name             => 'SLA',
                UseAsXvalue      => 1,
                UseAsValueSeries => 1,
                UseAsRestriction => 1,
                Element          => 'SLAIDs',
                Block            => 'MultiSelectField',
                Translation      => 0,
                Values           => \%SLA,
            },
        );

        unshift @ObjectAttributes, @ObjectAttributeAdd;
    }

    if ( $Self->{ConfigObject}->Get('Ticket::Type') ) {

        # get ticket type list
        my %Type = $Self->{TypeObject}->TypeList(
            UserID => 1,
        );

        my %ObjectAttribute1 = (
            Name             => 'Type',
            UseAsXvalue      => 1,
            UseAsValueSeries => 1,
            UseAsRestriction => 1,
            Element          => 'TypeIDs',
            Block            => 'MultiSelectField',
            Translation      => 0,
            Values           => \%Type,
        );

        unshift @ObjectAttributes, \%ObjectAttribute1;
    }

    if ( $Self->{ConfigObject}->Get('Stats::UseAgentElementInStats') ) {

        my @ObjectAttributeAdd = (
            {
                Name             => 'Accounted time by Agent',
                UseAsXvalue      => 1,
                UseAsValueSeries => 1,
                UseAsRestriction => 1,
                Element          => 'AccountedByAgent',
                Block            => 'MultiSelectField',
                Translation      => 0,
                Values           => \%UserList,
            },
            {
                Name             => 'Agent/Owner',
                UseAsXvalue      => 1,
                UseAsValueSeries => 1,
                UseAsRestriction => 1,
                Element          => 'OwnerIDs',
                Block            => 'MultiSelectField',
                Translation      => 0,
                Values           => \%UserList,
            },
            {
                Name             => 'Created by Agent/Owner',
                UseAsXvalue      => 1,
                UseAsValueSeries => 1,
                UseAsRestriction => 1,
                Element          => 'CreatedUserIDs',
                Block            => 'MultiSelectField',
                Translation      => 0,
                Values           => \%UserList,
            },
            {
                Name             => 'Responsible',
                UseAsXvalue      => 1,
                UseAsValueSeries => 1,
                UseAsRestriction => 1,
                Element          => 'ResponsibleIDs',
                Block            => 'MultiSelectField',
                Translation      => 0,
                Values           => \%UserList,
            },
        );

        push @ObjectAttributes, @ObjectAttributeAdd;
    }

    if ( $Self->{ConfigObject}->Get('Stats::CustomerIDAsMultiSelect') ) {

        # Get CustomerID
        # (This way also can be the solution for the CustomerUserID)
        $Self->{DBObject}->Prepare(
            SQL => "SELECT DISTINCT customer_id FROM ticket",
        );

        # fetch the result
        my %CustomerID;
        while ( my @Row = $Self->{DBObject}->FetchrowArray() ) {
            if ( $Row[0] ) {
                $CustomerID{ $Row[0] } = $Row[0];
            }
        }

        my %ObjectAttribute = (
            Name             => 'CustomerID',
            UseAsXvalue      => 1,
            UseAsValueSeries => 1,
            UseAsRestriction => 1,
            Element          => 'CustomerID',
            Block            => 'MultiSelectField',
            Values           => \%CustomerID,
        );

        push @ObjectAttributes, \%ObjectAttribute;
    }
    else {

        my %ObjectAttribute = (
            Name             => 'CustomerID',
            UseAsXvalue      => 0,
            UseAsValueSeries => 0,
            UseAsRestriction => 1,
            Element          => 'CustomerID',
            Block            => 'InputField',
        );

        push @ObjectAttributes, \%ObjectAttribute;
    }

    FREEKEY:
    for my $FreeKey ( 1 .. 16 ) {

        # get ticket free key config
        my $TicketFreeKey = $Self->{ConfigObject}->Get( 'TicketFreeKey' . $FreeKey );

        next FREEKEY if ref $TicketFreeKey ne 'HASH';

        my @FreeKey = keys %{$TicketFreeKey};
        my $Name    = '';

        if ( scalar @FreeKey == 1 ) {
            $Name = $TicketFreeKey->{ $FreeKey[0] };
        }
        else {
            $Name = 'TicketFreeText' . $FreeKey;

            my %ObjectAttribute = (
                Name             => 'TicketFreeKey' . $FreeKey,
                UseAsXvalue      => 1,
                UseAsValueSeries => 1,
                UseAsRestriction => 1,
                Element          => 'TicketFreeKey' . $FreeKey,
                Block            => 'MultiSelectField',
                Values           => $TicketFreeKey,
                Translation      => 0,
            );

            push @ObjectAttributes, \%ObjectAttribute;
        }

        # get ticket free text
        my $TicketFreeText = $Self->{TicketObject}->TicketFreeTextGet(
            Type   => 'TicketFreeText' . $FreeKey,
            Action => 'AgentStats',
            FillUp => 1,
            UserID => 1,
        );

        if ($TicketFreeText) {

            my %ObjectAttribute = (
                Name             => $Name,
                UseAsXvalue      => 1,
                UseAsValueSeries => 1,
                UseAsRestriction => 1,
                Element          => 'TicketFreeText' . $FreeKey,
                Block            => 'MultiSelectField',
                Values           => $TicketFreeText,
                Translation      => 0,
            );

            push @ObjectAttributes, \%ObjectAttribute;
        }
        else {

            my %ObjectAttribute = (
                Name             => $Name,
                UseAsXvalue      => 0,
                UseAsValueSeries => 0,
                UseAsRestriction => 1,
                Element          => 'TicketFreeText' . $FreeKey,
                Block            => 'InputField',
            );

            push @ObjectAttributes, \%ObjectAttribute;
        }
    }

    return @ObjectAttributes;
}

sub GetStatTable {
    my ( $Self, %Param ) = @_;
    my @StatArray;
    if ( $Param{XValue}{Element} && $Param{XValue}{Element} eq 'KindsOfReporting' ) {

        for my $Row ( sort keys %{ $Param{TableStructure} } ) {
            my @ResultRow        = ($Row);
            my %SearchAttributes = ( %{ $Param{TableStructure}{$Row}[0] } );

            my %Reporting = $Self->_ReportingValues(
                SearchAttributes         => \%SearchAttributes,
                SelectedKindsOfReporting => $Param{XValue}{SelectedValues},
            );

            KIND:
            for my $Kind ( @{ $Self->_SortedKindsOfReporting() } ) {
                next KIND if !defined $Reporting{$Kind};
                push @ResultRow, $Reporting{$Kind};
            }
            push @StatArray, \@ResultRow;
        }
    }
    else {
        my $KindsOfReportingRef = $Self->_KindsOfReporting();
        $Param{Restrictions}{KindsOfReporting} ||= ['TotalTime'];
        my $NumberOfReportingKinds   = scalar @{ $Param{Restrictions}{KindsOfReporting} };
        my $SelectedKindsOfReporting = $Param{Restrictions}{KindsOfReporting};

        delete $Param{Restrictions}{KindsOfReporting};
        for my $Row ( sort keys %{ $Param{TableStructure} } ) {
            my @ResultRow = ($Row);

            for my $Cell ( @{ $Param{TableStructure}{$Row} } ) {
                my %SearchAttributes = %{$Cell};
                my %Reporting        = $Self->_ReportingValues(
                    SearchAttributes         => \%SearchAttributes,
                    SelectedKindsOfReporting => $SelectedKindsOfReporting,
                );

                my $CellContent = '';

                if ( $NumberOfReportingKinds == 1 ) {
                    my @Values = values %Reporting;
                    $CellContent = $Values[0];
                }
                else {

                    KIND:
                    for my $Kind ( @{ $Self->_SortedKindsOfReporting() } ) {
                        next KIND if !defined $Reporting{$Kind};
                        $CellContent
                            .= "$Reporting{$Kind} (" . $KindsOfReportingRef->{$Kind} . "), ";
                    }
                }
                push @ResultRow, $CellContent;
            }
            push @StatArray, \@ResultRow;
        }
    }
    return @StatArray;

}

sub GetHeaderLine {

    my ( $Self, %Param ) = @_;

    if ( $Param{XValue}{Element} eq 'KindsOfReporting' ) {

        my %Selected = map { $_ => 1 } @{ $Param{XValue}{SelectedValues} };

        my $Attributes = $Self->_KindsOfReporting();
        my @HeaderLine = ('Evaluation by');
        my $SortedRef  = $Self->_SortedKindsOfReporting();

        ATTRIBUTE:
        for my $Attribute ( @{$SortedRef} ) {
            next ATTRIBUTE if !$Selected{$Attribute};
            push @HeaderLine, $Attributes->{$Attribute};
        }
        return \@HeaderLine;

    }
    return;

}

sub ExportWrapper {
    my ( $Self, %Param ) = @_;

    # wrap ids to used spelling
    for my $Use (qw(UseAsValueSeries UseAsRestriction UseAsXvalue)) {
        ELEMENT:
        for my $Element ( @{ $Param{$Use} } ) {
            next ELEMENT if !$Element || !$Element->{SelectedValues};
            my $ElementName = $Element->{Element};
            my $Values      = $Element->{SelectedValues};

            if ( $ElementName eq 'QueueIDs' || $ElementName eq 'CreatedQueueIDs' ) {
                ID:
                for my $ID ( @{$Values} ) {
                    next ID if !$ID;
                    $ID->{Content} = $Self->{QueueObject}->QueueLookup( QueueID => $ID->{Content} );
                }
            }
            elsif ( $ElementName eq 'StateIDs' || $ElementName eq 'CreatedStateIDs' ) {
                my %StateList = $Self->{StateObject}->StateList( UserID => 1 );
                ID:
                for my $ID ( @{$Values} ) {
                    next ID if !$ID;
                    $ID->{Content} = $StateList{ $ID->{Content} };
                }
            }
            elsif ( $ElementName eq 'PriorityIDs' || $ElementName eq 'CreatedPriorityIDs' ) {
                my %PriorityList = $Self->{PriorityObject}->PriorityList( UserID => 1 );
                ID:
                for my $ID ( @{$Values} ) {
                    next ID if !$ID;
                    $ID->{Content} = $PriorityList{ $ID->{Content} };
                }
            }
            elsif (
                $ElementName    eq 'OwnerIDs'
                || $ElementName eq 'CreatedUserIDs'
                || $ElementName eq 'ResponsibleIDs'
                )
            {
                ID:
                for my $ID ( @{$Values} ) {
                    next ID if !$ID;
                    $ID->{Content} = $Self->{UserObject}->UserLookup( UserID => $ID->{Content} );
                }
            }

            # Locks and statustype don't have to wrap because they are never different
        }
    }
    return \%Param;
}

sub ImportWrapper {
    my ( $Self, %Param ) = @_;

    # wrap used spelling to ids
    for my $Use (qw(UseAsValueSeries UseAsRestriction UseAsXvalue)) {
        ELEMENT:
        for my $Element ( @{ $Param{$Use} } ) {
            next ELEMENT if !$Element || !$Element->{SelectedValues};
            my $ElementName = $Element->{Element};
            my $Values      = $Element->{SelectedValues};

            if ( $ElementName eq 'QueueIDs' || $ElementName eq 'CreatedQueueIDs' ) {
                ID:
                for my $ID ( @{$Values} ) {
                    next ID if !$ID;
                    if ( $Self->{QueueObject}->QueueLookup( Queue => $ID->{Content} ) ) {
                        $ID->{Content}
                            = $Self->{QueueObject}->QueueLookup( Queue => $ID->{Content} );
                    }
                    else {
                        $Self->{LogObject}->Log(
                            Priority => 'error',
                            Message  => "Import: Can' find the queue $ID->{Content}!"
                        );
                        $ID = undef;
                    }
                }
            }
            elsif ( $ElementName eq 'StateIDs' || $ElementName eq 'CreatedStateIDs' ) {
                ID:
                for my $ID ( @{$Values} ) {
                    next ID if !$ID;

                    my %State = $Self->{StateObject}->StateGet(
                        Name  => $ID->{Content},
                        Cache => 1,
                    );
                    if ( $State{ID} ) {
                        $ID->{Content} = $State{ID};
                    }
                    else {
                        $Self->{LogObject}->Log(
                            Priority => 'error',
                            Message  => "Import: Can' find state $ID->{Content}!"
                        );
                        $ID = undef;
                    }
                }
            }
            elsif ( $ElementName eq 'PriorityIDs' || $ElementName eq 'CreatedPriorityIDs' ) {
                my %PriorityList = $Self->{PriorityObject}->PriorityList( UserID => 1 );
                my %PriorityIDs;
                for my $Key ( keys %PriorityList ) {
                    $PriorityIDs{ $PriorityList{$Key} } = $Key;
                }
                ID:
                for my $ID ( @{$Values} ) {
                    next ID if !$ID;

                    if ( $PriorityIDs{ $ID->{Content} } ) {
                        $ID->{Content} = $PriorityIDs{ $ID->{Content} };
                    }
                    else {
                        $Self->{LogObject}->Log(
                            Priority => 'error',
                            Message  => "Import: Can' find priority $ID->{Content}!"
                        );
                        $ID = undef;
                    }
                }
            }
            elsif (
                $ElementName    eq 'OwnerIDs'
                || $ElementName eq 'CreatedUserIDs'
                || $ElementName eq 'ResponsibleIDs'
                )
            {
                ID:
                for my $ID ( @{$Values} ) {
                    next ID if !$ID;

                    if ( $Self->{UserObject}->UserLookup( UserLogin => $ID->{Content} ) ) {
                        $ID->{Content} = $Self->{UserObject}->UserLookup(
                            UserLogin => $ID->{Content}
                        );
                    }
                    else {
                        $Self->{LogObject}->Log(
                            Priority => 'error',
                            Message  => "Import: Can' find user $ID->{Content}!"
                        );
                        $ID = undef;
                    }
                }
            }

            # Locks and statustype don't have to wrap because they are never different
        }
    }
    return \%Param;
}

sub _ReportingValues {
    my ( $Self, %Param ) = @_;
    my $SearchAttributes = $Param{SearchAttributes};
    my @Where;

    # get ticket search relevant attributes
    my %TicketSearch;
    ATTRIBUTE:
    for my $Attribute ( @{ $Self->_AllowedTicketSearchAttributes() } ) {
        next ATTRIBUTE if !$SearchAttributes->{$Attribute};
        $TicketSearch{$Attribute} = $SearchAttributes->{$Attribute};
    }

    if (%TicketSearch) {

        # get the involved tickets
        my @TicketIDs = $Self->{TicketObject}->TicketSearch(
            UserID     => 1,
            Result     => 'ARRAY',
            Permission => 'ro',
            Limit      => 100_000_000,
            %TicketSearch,
        );

        # do nothing, if there are no tickets
        if ( !@TicketIDs ) {
            my %Reporting;
            for my $Kind ( @{ $Param{SelectedKindsOfReporting} } ) {
                $Reporting{$Kind} = 0;
            }
            return %Reporting;
        }

        my $TicketString = join ', ', @TicketIDs;
        push @Where, "ticket_id IN ( $TicketString )";
    }

    if ( $SearchAttributes->{AccountedByAgent} ) {
        my @AccountedByAgent = map { $Self->{DBObject}->Quote( $_, 'Integer' ) }
            @{ $SearchAttributes->{AccountedByAgent} };
        my $String = join ', ', @AccountedByAgent;
        push @Where, "create_by IN ( $String )";
    }

    if (
        $SearchAttributes->{ArticleAccountedTimeOlderDate}
        && $SearchAttributes->{ArticleAccountedTimeNewerDate}
        )
    {
        my $Start = $Self->{DBObject}->Quote( $SearchAttributes->{ArticleAccountedTimeNewerDate} );
        my $Stop  = $Self->{DBObject}->Quote( $SearchAttributes->{ArticleAccountedTimeOlderDate} );
        push @Where, "create_time >= '$Start' AND create_time <= '$Stop'";
    }
    my $WhereString = '';
    if (@Where) {
        $WhereString = 'WHERE ' . join ' AND ', @Where;
    }

    # ask only for the needed kinds to get a better performance
    my %SelectedKindsOfReporting = map { $_ => 1 } @{ $Param{SelectedKindsOfReporting} };
    my %Reporting;

    if ( $SelectedKindsOfReporting{TotalTime} ) {

        # db query
        $Self->{DBObject}->Prepare(
            SQL => "SELECT SUM(time_unit) FROM time_accounting $WhereString"
        );

        while ( my @Row = $Self->{DBObject}->FetchrowArray() ) {
            $Reporting{TotalTime} = $Row[0] ? int( $Row[0] * 100 ) / 100 : 0;
        }
    }
    if (
        !$SelectedKindsOfReporting{TicketAverage}
        && !$SelectedKindsOfReporting{TicketMinTime}
        && !$SelectedKindsOfReporting{TicketMaxTime}
        && !$SelectedKindsOfReporting{NumberOfTickets}
        && !$SelectedKindsOfReporting{ArticleAverage}
        && !$SelectedKindsOfReporting{ArticleMaxTime}
        && !$SelectedKindsOfReporting{ArticleMinTime}
        && !$SelectedKindsOfReporting{NumberOfArticles}
        )
    {
        return %Reporting;
    }

    # db query
    $Self->{DBObject}->Prepare(
        SQL => "SELECT ticket_id, article_id, time_unit FROM time_accounting $WhereString"
    );

    my %TicketID;
    my %ArticleID;
    my $Time = 0;
    while ( my @Row = $Self->{DBObject}->FetchrowArray() ) {
        $TicketID{ $Row[0] }  += $Row[2];
        $ArticleID{ $Row[1] } += $Row[2];
        $Time                 += $Row[2];
    }

    my @TicketTimeLine  = sort { $a <=> $b } values %TicketID;
    my @ArticleTimeLine = sort { $a <=> $b } values %ArticleID;

    if ( $SelectedKindsOfReporting{TicketAverage} ) {
        my $NumberOfTickets = scalar keys %TicketID;
        my $Average = $NumberOfTickets ? $Time / $NumberOfTickets : 0;
        $Reporting{TicketAverage} = sprintf( "%.2f", $Average );
    }
    if ( $SelectedKindsOfReporting{TicketMinTime} ) {
        $Reporting{TicketMinTime} = $TicketTimeLine[0] || 0;
    }
    if ( $SelectedKindsOfReporting{TicketMaxTime} ) {
        $Reporting{TicketMaxTime} = $TicketTimeLine[-1] || 0;
    }
    if ( $SelectedKindsOfReporting{NumberOfTickets} ) {
        $Reporting{NumberOfTickets} = scalar keys %TicketID;
    }
    if ( $SelectedKindsOfReporting{ArticleAverage} ) {
        my $NumberOfArticles = scalar keys %ArticleID;
        my $Average = $NumberOfArticles ? $Time / $NumberOfArticles : 0;
        $Reporting{ArticleAverage} = sprintf( "%.2f", $Average );
    }
    if ( $SelectedKindsOfReporting{ArticleMinTime} ) {
        $Reporting{ArticleMinTime} = $ArticleTimeLine[0] || 0;
    }
    if ( $SelectedKindsOfReporting{ArticleMaxTime} ) {
        $Reporting{ArticleMaxTime} = $ArticleTimeLine[-1] || 0;
    }
    if ( $SelectedKindsOfReporting{NumberOfArticles} ) {
        $Reporting{NumberOfArticles} = scalar keys %ArticleID;
    }

    return %Reporting;
}

sub _KindsOfReporting {
    my $Self = shift;

    my %KindsOfReporting = (
        TotalTime        => 'Total Time',
        TicketAverage    => 'Ticket Average',
        TicketMinTime    => 'Ticket Min Time',
        TicketMaxTime    => 'Ticket Max Time',
        NumberOfTickets  => 'Number of Tickets',
        ArticleAverage   => 'Article Average',
        ArticleMinTime   => 'Article Min Time',
        ArticleMaxTime   => 'Article Max Time',
        NumberOfArticles => 'Number of Articles',
    );
    return \%KindsOfReporting;
}

sub _SortedKindsOfReporting {
    my $Self = shift;

    my @SortedKindsOfReporting = qw(
        TotalTime
        TicketAverage
        TicketMinTime
        TicketMaxTime
        NumberOfTickets
        ArticleAverage
        ArticleMinTime
        ArticleMaxTime
        NumberOfArticles
    );
    return \@SortedKindsOfReporting;
}

sub _AllowedTicketSearchAttributes {
    my $Self = shift;

    my @Attributes = qw(
        TicketNumber
        Title
        Queues
        QueueIDs
        Types
        TypeIDs
        States
        StateIDs
        StateType
        StateTypeIDs
        Priorities
        PriorityIDs
        Services
        ServiceIDs
        SLAs
        SLAIDs
        Locks
        LockIDs
        OwnerIDs
        ResponsibleIDs
        WatchUserIDs
        CustomerID
        CustomerUserLogin
        CreatedUserIDs
        CreatedTypes
        CreatedTypeIDs
        CreatedPriorities
        CreatedPriorityIDs
        CreatedStates
        CreatedStateIDs
        CreatedQueues
        CreatedQueueIDs
        From
        To
        Subject
        Body
        TicketCreateTimeNewerDate
        TicketCreateTimeOlderDate
        TicketChangeTimeNewerDate
        TicketChangeTimeOlderDate
        TicketCloseTimeNewerDate
        TicketCloseTimeOlderDate
        TicketPendingTimeNewerDate
        TicketPendingTimeOlderDate
        TicketEscalationTimeNewerDate
        TicketEscalationTimeOlderDate
        TicketEscalationUpdateTimeNewerDate
        TicketEscalationUpdateTimeOlderDate
        TicketEscalationResponseTimeNewerDate
        TicketEscalationResponseTimeOlderDate
        TicketEscalationSolutionTimeNewerDate
        TicketEscalationSolutionTimeOlderDate
        TicketFreeTime1NewerDate
        TicketFreeTime1OlderDate
        TicketFreeTime2NewerDate
        TicketFreeTime2OlderDate
        TicketFreeTime3NewerDate
        TicketFreeTime3OlderDate
        TicketFreeTime4NewerDate
        TicketFreeTime4OlderDate
        TicketFreeTime5NewerDate
        TicketFreeTime5OlderDate
        TicketFreeTime6NewerDate
        TicketFreeTime6OlderDate
    );

    FREEKEY:
    for my $FreeKey ( 1 .. 16 ) {
        push @Attributes, 'TicketFreeKey' . $FreeKey, 'TicketFreeText' . $FreeKey;
    }

    return \@Attributes;
}

1;
