#!/usr/bin/perl

# Copyright 2010 BibLibre
# Copyright 2011 MJ Ray and software.coop
#
# This file is part of Koha.
#
# Koha is free software; you can redistribute it and/or modify it
# under the terms of the GNU General Public License as published by
# the Free Software Foundation; either version 3 of the License, or
# (at your option) any later version.
#
# Koha is distributed in the hope that it will be useful, but
# WITHOUT ANY WARRANTY; without even the implied warranty of
# MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
# GNU General Public License for more details.
#
# You should have received a copy of the GNU General Public License
# along with Koha; if not, see <http://www.gnu.org/licenses>.

use Modern::Perl;

use C4::Auth qw( get_template_and_user );
use CGI qw ( -utf8 );
use Text::CSV::Encoded;
use C4::Context;
use C4::Output qw( output_html_with_http_headers );
use C4::Serials qw( CountSubscriptionFromBiblionumber );
use C4::Search qw( enabled_staff_search_views );

use Koha::ActionLogs;
use Koha::Database;
use Koha::DateUtils qw( dt_from_string );
use Koha::Items;
use Koha::Patrons;
use Koha::Recalls;


=head1 viewlog.pl

plugin that shows stats

=cut

my $input = CGI->new;

my $do_it    = $input->param('do_it');    # no op: just viewing, downloading etc
my @modules  = $input->multi_param("modules");
my $user     = $input->param("user") // '';
my @actions  = $input->multi_param("actions");
my @interfaces  = $input->multi_param("interfaces");
my $object   = $input->param("object");
my $object_type = $input->param("object_type") // '';
my $info     = $input->param("info");
my $datefrom = $input->param("from");
my $dateto   = $input->param("to");
my $basename = $input->param("basename");
my $output   = $input->param("output") || "screen";
my $src      = $input->param("src") || ""; # this param allows us to be told where we were called from -fbcit

my ( $template, $borrowernumber, $cookie ) = get_template_and_user(
    {
        template_name   => "tools/viewlog.tt",
        query           => $input,
        type            => "intranet",
        flagsrequired   => { tools => 'view_system_logs' },
    }
);

if ( $src eq 'circ' ) {

    my $borrowernumber = $object;
    my $patron = Koha::Patrons->find( $borrowernumber );
    my $circ_info = 1;
    unless ( $patron ) {
         $circ_info = 0;
    }

    $template->param(
        patron      => $patron,
        circulation => $circ_info,
    );
}

$template->param(
    C4::Search::enabled_staff_search_views,
    subscriptionsnumber => ( $object ? CountSubscriptionFromBiblionumber($object) : 0 ),
    object => $object,
);

if ($do_it) {
    my $dtf = Koha::Database->new->schema->storage->datetime_parser;
    my %search_params;

    if ($datefrom and $dateto ) {
        my $dateto_endday = dt_from_string($dateto);
        $dateto_endday->set( # We set last second of day to see all log from that day
            hour => 23,
            minute => 59,
            second => 59
        );
        $search_params{'timestamp'} = {
            -between => [
                $dtf->format_datetime( dt_from_string($datefrom) ),
                $dtf->format_datetime( $dateto_endday ),
            ]
        };
    } elsif ($datefrom) {
        $search_params{'timestamp'} = {
            '>=' => $dtf->format_datetime( dt_from_string($datefrom) )
        };
    } elsif ($dateto) {
        my $dateto_endday = dt_from_string($dateto);
        $dateto_endday->set( # We set last second of day to see all log from that day
            hour => 23,
            minute => 59,
            second => 59
        );
        $search_params{'timestamp'} = {
            '<=' => $dtf->format_datetime( $dateto_endday )
        };
    }
    # Circulation uses RENEWAL, but Patrons uses RENEW, this helps to find both
    if ( grep { $_ eq 'RENEW'} @actions ) { push @actions, 'RENEWAL' };

    $search_params{user} = $user if $user;
    $search_params{module} = { -in => [ @modules ] } if ( defined $modules[0] and $modules[0] ne '' ) ;
    $search_params{action} = { -in => [ @actions ] } if ( defined $actions[0] && $actions[0] ne '' );
    $search_params{interface} = { -in => [ @interfaces ] } if ( defined $interfaces[0] && $interfaces[0] ne '' );

    if ( @modules == 1 && $object_type eq 'biblio' ) {
        # Handle 'Modification log' from cataloguing
        my $biblio = Koha::Biblios->find( $object );
        my @itemnumbers = $biblio->items->get_column('itemnumber');
        $search_params{'-or'} = [
            { -and => { object => $object, info => { -like => 'biblio%' }}},
            { -and => { object => \@itemnumbers, info => { -like => 'item%' }}},
        ];
        $template->param( biblio => $biblio );
    } else {
        $search_params{info} = { -like => '%' . $info . '%' } if $info;
        $search_params{object} = $object if $object;
    }

    my @logs = Koha::ActionLogs->search(\%search_params)->as_list;

    my @data;
    foreach my $log (@logs) {
        my $result = $log->unblessed;
        # Init additional columns for CSV export
        $result->{'biblionumber'}      = q{};
        $result->{'biblioitemnumber'}  = q{};
        $result->{'barcode'}           = q{};

        if ( substr( $log->info, 0, 4 ) eq 'item' || $log->module eq "CIRCULATION" ) {

            # get item information so we can create a working link
            my $itemnumber = $log->object;
            $itemnumber = $log->info if ( $log->module eq "CIRCULATION" );
            my $item = Koha::Items->find($itemnumber);
            if ($item) {
                $result->{'object_found'}     = 1;
                $result->{'biblionumber'}     = $item->biblionumber;
                $result->{'biblioitemnumber'} = $item->biblionumber;
                $result->{'barcode'}          = $item->barcode;
            }
        }

        #always add firstname and surname for librarian/user
        if ( $log->user ) {
            my $patron = Koha::Patrons->find( $log->user );
            if ($patron && $output eq 'screen') {
                $result->{librarian} = $patron;
            }
        }

        #add firstname and surname for borrower, when using the CIRCULATION, MEMBERS, FINES
        if ( $log->module eq "CIRCULATION" || $log->module eq "MEMBERS" || $log->module eq "FINES" ) {
            if ( $log->object ) {
                my $patron = Koha::Patrons->find( $log->object );
                if ($patron && $output eq 'screen') {
                    $result->{patron} = $patron;
                }
            }
        }

        if ( $log->module eq 'NOTICES' ) {
            if ( $log->object ) {
                my $notice = Koha::Notice::Templates->find( { id => $log->object } );
                if ($notice && $output eq 'screen') {
                    $result->{notice} = $notice->unblessed;
                }
            }
        }

        # get recall information
        if ( $log->module eq "RECALLS" ) {
            if ( $log->object ) {
                my $recall = Koha::Recalls->find( $log->object );
                if ( $recall && $output eq 'screen' ) {
                    $result->{recall} = $recall;
                }
            }
        }
        push @data, $result;
    }
    if ( $output eq "screen" ) {

        # Printing results to screen
        $template->param(
            logview  => 1,
            total    => scalar @data,
            looprow  => \@data,
            do_it    => 1,
            datefrom => $datefrom,
            dateto   => $dateto,
            user     => $user,
            info     => $info,
            src      => $src,
            modules  => \@modules,
            actions  => \@actions,
            interfaces => \@interfaces
        );

        # Used modules
        foreach my $module (@modules) {
            $template->param( $module => 1 );
        }
        output_html_with_http_headers $input, $cookie, $template->output;
    }
    else {

        # Printing to a csv file
        my $content = q{};
        if (@data) {
            my $delimiter = C4::Context->csv_delimiter;
            my $csv = Text::CSV::Encoded->new( { encoding_out => 'utf8', sep_char => $delimiter } );
            $csv or die "Text::CSV::Encoded->new FAILED: " . Text::CSV::Encoded->error_diag();

            # First line with heading
            # Exporting bd id seems useless
            my @headings = grep { $_ ne 'action_id' } sort keys %{$data[0]};
            if ( $csv->combine(@headings) ) {
                $content .= $csv->string() . "\n";
            }

            # Lines of logs
            foreach my $line (@data) {
                my @cells = map { $line->{$_} } @headings;
                if ( $csv->combine(@cells) ) {
                    $content .= $csv->string() . "\n";
                }
            }
        }

        # Output
        print $input->header(
            -type       => 'text/csv',
            -attachment => $basename . '.csv',
        );
        print $content;
    }
    exit;
}
else {
    output_html_with_http_headers $input, $cookie, $template->output;
}