#!/usr/bin/perl

# This file is part of Koha.
#
# Copyright (C) 2011  Chris Cormack <chris@bigballofwax.co.nz>
# Copyright (C) 2013  Mark Tompsett
#
# 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 <https://www.gnu.org/licenses>.

use Modern::Perl;

use C4::Auth            qw( check_api_auth );
use C4::Reports::Guided qw( execute_query );
use Koha::Reports;
use JSON qw( encode_json decode_json to_json );
use CGI  qw ( -utf8 );

use Koha::Caches;

my $query             = CGI->new();
my $report_id         = $query->param('id');
my $report_name       = $query->param('name');
my $report_annotation = $query->param('annotated');

my $report_recs = Koha::Reports->search( $report_name ? { 'report_name' => $report_name } : { 'id' => $report_id } );

if ( !$report_recs || $report_recs->count == 0 ) { die "There is no such report.\n"; }
my $report_rec = $report_recs->next();

$report_id = $report_rec->id;

my @sql_params  = $query->multi_param('sql_params');
my @param_names = $query->multi_param('param_names');

my ( $status, $cookie, $sessionID ) = check_api_auth( $query, { catalogue => '1' } );
unless ( $status eq "ok" ) {
    print $query->header( -type => 'application/json', -status => '401 Unauthorized' );
    print to_json( { auth_status => $status } );
    exit 0;
}

my $cache        = Koha::Caches->get_instance();
my $cache_active = $cache->is_cache_active;
my ( $cache_key, $json_text );
if ($cache_active) {
    $cache_key =
          "intranet:report:"
        . ( $report_name ? "report_name:$report_name:" : "id:$report_id:" )
        . join( '-', @sql_params )
        . join( '_' . @param_names );
    $json_text = $cache->get_from_cache($cache_key);
}

unless ($json_text) {
    my $limit = C4::Context->preference("SvcMaxReportRows") || 10;

    my ( $sql, undef ) = $report_rec->prep_report( \@param_names, \@sql_params );

    my ( $sth, $errors ) = execute_query(
        {
            sql       => $sql,
            offset    => 0,
            limit     => $limit,
            report_id => $report_id,
        }
    );
    if ($errors) {
        $json_text = encode_json($errors);
    } else {
        my $lines;
        if ($report_annotation) {
            $lines = $sth->fetchall_arrayref( {} );
        } else {
            $lines = $sth->fetchall_arrayref;
        }
        $json_text = encode_json($lines);

        if ($cache_active) {
            $cache->set_in_cache( $cache_key, $json_text, { expiry => $report_rec->cache_expiry } );
        }
    }
}

print $query->header(
    -charset => 'UTF-8',
    -type    => 'application/json'
);
print $json_text;
