#!/usr/bin/perl


# Copyright 2000-2002 Katipo Communications
#
# 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 2 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, write to the Free Software Foundation, Inc., 59 Temple Place,
# Suite 330, Boston, MA  02111-1307 USA

use strict;
use C4::Context;
use C4::Output;
use CGI;
use C4::Auth;
use C4::Dates qw/format_date format_date_in_iso/;
use Date::Calc qw/Today Add_Delta_YM/;

use vars qw($debug);

BEGIN {
    $debug = $ENV{DEBUG} || 0;
}

my $input = new CGI;
my $order = $input->param('order');
my $startdate=$input->param('from');
my $enddate=$input->param('to');
my $ratio=$input->param('ratio');

my $theme = $input->param('theme');    # only used if allowthemeoverride is set

my ( $template, $loggedinuser, $cookie ) = get_template_and_user(
    {
        template_name   => "circ/reserveratios.tmpl",
        query           => $input,
        type            => "intranet",
        authnotrequired => 0,
        flagsrequired   => { circulate => 1 },
        debug           => 1,
    }
);

my $duedate;
my $borrowernumber;
my $itemnum;
my $data1;
my $data2;
my $data3;
my $name;
my $phone;
my $email;
my $biblionumber;
my $title;
my $author;

my ( $year, $month, $day ) = Today();
my $todaysdate     = sprintf("%-04.4d-%-02.2d-%02.2d", $year, $month, $day);
# Find yesterday for the default shelf pull start and end dates
#    A default of the prior years's holds is a reasonable way to pull holds 
my $datelastyear = sprintf("%-04.4d-%-02.2d-%02.2d", Add_Delta_YM($year, $month, $day, -1, 0));

#		Predefine the start and end dates if they are not already defined
$startdate =~ s/^\s+//;
$startdate =~ s/\s+$//;
$enddate =~ s/^\s+//;
$enddate =~ s/\s+$//;
#		Check if null, should string match, if so set start and end date to yesterday
if (!defined($startdate) or $startdate eq "") {
	$startdate = format_date($datelastyear);
}
if (!defined($enddate) or $enddate eq "") {
	$enddate = format_date($todaysdate);
}
if (!defined($ratio)  or $ratio eq "" or $ratio !~ /^\s*\d+\s*$/ ) {
	$ratio = 3;
}
if ($ratio == 0) {
    $ratio = 1; # prevent division by zero
}

my $dbh    = C4::Context->dbh;
my ($sqlorderby, $sqldatewhere) = ("","");
$debug and warn format_date_in_iso($startdate) . "\n" . format_date_in_iso($enddate);
$sqldatewhere .= " AND reservedate >= " . $dbh->quote(format_date_in_iso($startdate))  if ($startdate) ;
$sqldatewhere .= " AND reservedate <= " . $dbh->quote(format_date_in_iso($enddate))  if ($enddate) ;

if ($order eq "biblio") {
	$sqlorderby = " order by biblio.title, holdingbranch, listcall, l_location ";
} elsif ($order eq "callnumber") {
    $sqlorderby = " order by listcall, holdingbranch, l_location ";
} elsif ($order eq "itemcount") {
    $sqlorderby = " order by itemcount, reservecount ";
} elsif ($order eq "itype") {
    $sqlorderby = " order by l_itype, holdingbranch, listcall ";
} elsif ($order eq "location") {
    $sqlorderby = " order by l_location, holdingbranch, listcall ";
} elsif ($order eq "reservecount") {
    $sqlorderby = " order by reservecount DESC ";
} elsif ($order eq "branch") {
    $sqlorderby = " order by holdingbranch, l_location, listcall ";
} else {
	$sqlorderby = " order by reservecount DESC ";
}
my $strsth =
"SELECT reservedate,
        reserves.borrowernumber as borrowernumber,
        reserves.biblionumber,
        reserves.branchcode as branch,
        items.holdingbranch,
        items.itemcallnumber,
        items.itemnumber,
        GROUP_CONCAT(DISTINCT items.itemcallnumber 
        		ORDER BY items.itemnumber SEPARATOR '<br>') as listcall,
        GROUP_CONCAT(DISTINCT holdingbranch 
        		ORDER BY items.itemnumber SEPARATOR '<br>') as listbranch,
        GROUP_CONCAT(DISTINCT items.location 
        		ORDER BY items.itemnumber SEPARATOR '<br>') as l_location,
        GROUP_CONCAT(DISTINCT items.itype 
        		ORDER BY items.itemnumber SEPARATOR '<br>') as l_itype,
        notes,
        reserves.found,
        biblio.title,
        biblio.author,
        count(DISTINCT reserves.borrowernumber) as reservecount, 
        count(DISTINCT items.itemnumber) as itemcount 
 FROM  reserves
 LEFT JOIN items ON items.biblionumber=reserves.biblionumber 
 LEFT JOIN biblio ON reserves.biblionumber=biblio.biblionumber
 WHERE 
notforloan = 0 AND damaged = 0 AND itemlost = 0 AND wthdrawn = 0
 $sqldatewhere
";


if (C4::Context->preference('IndependantBranches')){
	$strsth .= " AND items.holdingbranch=? ";
}
$strsth .= " GROUP BY reserves.biblionumber " . $sqlorderby;
my $sth = $dbh->prepare($strsth);

if (C4::Context->preference('IndependantBranches')){
	$sth->execute(C4::Context->userenv->{'branch'});
}
else {
	$sth->execute();
}	
my @reservedata;
while ( my $data = $sth->fetchrow_hashref ) {
    my @itemlist;
    my $ratiocalc =  int(10 * $data->{reservecount} / $data->{itemcount} / $ratio )/10;
    push(
        @reservedata,
        {
            reservedate      => format_date( $data->{reservedate} ),
            priority         => $data->{priority},
            name             => $data->{borrower},
            title            => $data->{title},
            author           => $data->{author},
            notes				  => $data->{notes},
            itemnum          => $data->{itemnumber},
            biblionumber     => $data->{biblionumber},
            holdingbranch    => $data->{holdingbranch},
            listbranch		  => $data->{listbranch},
            branch           => $data->{branch},
            itemcallnumber   => $data->{itemcallnumber},
            location			  => $data->{l_location},
            itype			     => $data->{l_itype},
            reservecount     => $data->{reservecount},
            itemcount    	  => $data->{itemcount},
            ratiocalc		  => $ratiocalc,
            ratio_ge_one	  => $ratiocalc ge 1.0 ? 1 : "",
            listcall   		  => $data->{listcall}    
        }
    );
}


$sth->finish;

$template->param(
    todaysdate      => format_date($todaysdate),
    from            => $startdate,
    to              => $enddate,
    ratio           => $ratio,
    reserveloop     => \@reservedata,
    "BiblioDefaultView".C4::Context->preference("BiblioDefaultView") => 1,
    DHTMLcalendar_dateformat =>  C4::Dates->DHTMLcalendar(),
);

output_html_with_http_headers $input, $cookie, $template->output;