#!/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.,
# 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301 USA.

use strict;
use warnings;
use CGI;

use C4::Auth;
use C4::Context;
use C4::Debug;
use C4::Branch; # GetBranches
use C4::Output;
use C4::Koha;   # GetItemTypes
use C4::Reports;    # GetDelimiterChoices
use C4::Circulation;
# use Date::Manip;  # TODO: add not borrowed since date X criteria
use Data::Dumper;

=head1 catalogue_out

Report that shows unborrowed items.

=cut

my $input = new CGI;
my $do_it    = $input->param('do_it');
my $limit    = $input->param("Limit");
my $column   = $input->param("Criteria");
my @filters  = $input->param("Filter");
my $output   = $input->param("output");
my $basename = $input->param("basename") || 'catalogue_out';
my ($template, $borrowernumber, $cookie) = get_template_and_user({
    template_name => "reports/catalogue_out.tmpl",
    query => $input,
    type => "intranet",
    authnotrequired => 0,
    flagsrequired => {reports => '*'},
    debug => 1,
});

our $sep     = $input->param("sep");
$sep = "\t" if ((! defined $sep) or $sep eq 'tabulation');

$template->param(do_it => $do_it);
if ($do_it) {
    my $results = calculate($limit, $column, \@filters);
    if ($output eq "screen") {
		# Printing results to screen
		$template->param(mainloop => $results);
        output_html_with_http_headers $input, $cookie, $template->output;
    } else {
		# Printing to a csv file	FIXME: This is broken rather badly, if it ever worked at all here.
        print $input->header(
			-type => 'application/vnd.sun.xml.calc',
            -encoding  => 'utf-8',
            -attachment=>"$basename.csv",
            -filename  =>"$basename.csv" );
        my $cols  = @$results[0]->{loopcol};
        my $lines = @$results[0]->{looprow};
# header
        print "num /". @$results[0]->{column} .$sep;
# Other header
        foreach my $col ( @$cols ) {
            print $col->{coltitle}.$sep;
        }
        print "Total\n";
# Table
        foreach my $line ( @$lines ) {
            my $x = $line->{loopcell};	# FIXME: No Such thing.
            print $line->{rowtitle}.$sep;
            foreach my $cell (@$x) {
                print $cell->{value}.$sep;
            }
            print $line->{totalrow}, "\n";
        }
# footer
        print "TOTAL";
        foreach my $col ( @$cols ) {
            print $sep.$col->{totalcol};
        }
        print $sep.@$results[0]->{total};
    }
    exit; # in either case, exit after do_it
}

# Displaying choices (i.e., not do_it)
my @values;
my %select;

my @mime  = ( map { +{type =>$_} } (split /[;:]/, 'CSV') ); # FIXME translation
my $itemtypes = GetItemTypes;
my @itemtypeloop;
foreach (sort {$itemtypes->{$a}->{description} cmp $itemtypes->{$b}->{description}} keys %$itemtypes) {
	push @itemtypeloop, {
		value => $_,
		description => $itemtypes->{$_}->{'description'},
   };
}

$template->param(
	CGIextChoice => \@mime,
	CGIsepChoice => GetDelimiterChoices,
	itemtypeloop => \@itemtypeloop,
	branchloop   => GetBranchesLoop($input->param("branch") || C4::Context->userenv->{branch}),
);
output_html_with_http_headers $input, $cookie, $template->output;


sub calculate {
    my ($limit, $column, $filters) = @_;
    my @loopline;
    my @looprow;
    my %globalline;
	my %columns = ();
    my $dbh = C4::Context->dbh;

# Filters
# Checking filters
#
    my @loopfilter;
    for (my $i=0;$i<=6;$i++) {
        if ( @$filters[$i] ) {
        	my %cell = (filter=>@$filters[$i]);
            if (($i==1) and (@$filters[$i-1])) {
                $cell{err} = 1 if (@$filters[$i]<@$filters[$i-1]) ;
            }
            $cell{crit} = "Branch"   if ($i==0);
            $cell{crit} = "Doc Type" if ($i==1);
            push @loopfilter, \%cell;
        }
    }
	push @loopfilter, {crit=>'limit', filter=>$limit} if ($limit);
    if ($column){
		push @loopfilter, {crit=>'by', filter=>$column};
		my $tablename = ($column =~ /branchcode/) ? 'branches' : 'items';
		$column = ($column =~ /branchcode/ or $column =~ /itype/) ? "$tablename.$column" : $column;
        my $strsth2 = ($tablename eq 'branches') ?
		"SELECT $column as coltitle, count(items.itemnumber) AS coltitle_count FROM $tablename LEFT JOIN items ON items.homebranch=$column " :
		"SELECT $column as coltitle, count(*)                AS coltitle_count FROM $tablename " ;
        if ($tablename eq 'branches') {
			my $f = @$filters[0];
            $f =~ s/\*/%/g;
            $strsth2 .= " AND $column LIKE '$f' " ;
        }
        $strsth2 .=" GROUP BY $column ORDER BY $column ";	# needed for count
		push @loopfilter, {crit=>'SQL', sql=>1, filter=>$strsth2};
        $debug and warn "catalogue_out SQL: ". $strsth2;
        my $sth2 = $dbh->prepare($strsth2);
        $sth2->execute;
    
        while (my ($celvalue, $count) = $sth2->fetchrow) {
			($celvalue) or $celvalue = 'UNKNOWN';
			$columns{$celvalue} = $count;
        }
    }
    
	my %tables = (map {$_=>[]} keys %columns);

# preparing calculation
	my @exe_args = ();
    my $query = "
        SELECT items.barcode        as barcode,
               items.homebranch     as branch,
               items.itemcallnumber as itemcallnumber,
               biblio.title         as title,
               biblio.biblionumber  as biblionumber,
               biblio.author        as author";
	($column) and $query .= ",\n$column as col ";
	$query .= "
        FROM items
        LEFT JOIN biblio      USING (biblionumber)
        LEFT JOIN     issues  USING (itemnumber)
        LEFT JOIN old_issues  USING (itemnumber)
          WHERE       issues.itemnumber IS NULL
           AND    old_issues.itemnumber IS NULL
	";
	if ($filters->[0]) {
    	$filters->[0]=~ s/\*/%/g;
		push @exe_args, $filters->[0]; 
    	$query .= " AND items.homebranch LIKE ?";
	}
	if ($filters->[1]) {
    	$filters->[1]=~ s/\*/%/g;
		push @exe_args, $filters->[1]; 
    	$query .= " AND items.itype      LIKE ?";
	}
	if ($column) {
		$query .= " AND $column = ? GROUP BY items.itemnumber, $column ";	# placeholder handled below
    } else {
		$query .= " GROUP BY items.itemnumber ";
	}
	$query .= " ORDER BY items.itemcallnumber DESC, barcode";
    $query .= " LIMIT 0,$limit" if ($limit);
    $debug and warn "SQL : $query";
    # warn "SQL : $query";
	push @loopfilter, {crit=>'SQL', sql=>1, filter=>$query};
    my $dbcalc = $dbh->prepare($query);

	if ($column) {
		foreach (sort keys %columns) {
			my (@more_exe_args) = @exe_args;	# execute(@exe_args,$_) would fail when the array is empty.
			push @more_exe_args, $_;			# but @more_exe_args will work
			$dbcalc->execute(@more_exe_args) or die "Query execute(@more_exe_args) failed: $query";
    		while (my $data = $dbcalc->fetchrow_hashref) {
				my $col = $data->{col} || 'NULL';
				$tables{$col} or $tables{$col} = [];
				push @{$tables{$col}}, $data;
			}
		}
	} else {
    	(scalar @exe_args) ? $dbcalc->execute(@exe_args) : $dbcalc->execute;
		while (my $data = $dbcalc->fetchrow_hashref) {
			my $col = $data->{col} || 'NULL';
			$tables{$col} or $tables{$col} = [];
			push @{$tables{$col}}, $data;
		}
	}
    
	foreach my $tablename (sort keys %tables) {
		my (@temptable);
		my $i=0;
		foreach my $cell (@{$tables{$tablename}}) {
			if (0 == $i++ and $debug) {
				my $dump = Dumper($cell);
				$dump =~ s/\n/ /gs;
				$dump =~ s/\s+/ /gs;
				print STDERR "first cell for $tablename: $dump";
			}
			push @temptable, $cell;
		}
		my $count = scalar(@temptable);
		my $allitems = $columns{$tablename};
		$globalline{total_looptable_count} += $count;
		$globalline{total_coltitle_count}  += $allitems;
    	push @{$globalline{looptables}}, {
			looprow  => \@temptable,
			coltitle => $tablename,
			coltitle_count  => $allitems,
			looptable_count => $count,
			looptable_first => ($count) ? $temptable[ 0]->{itemcallnumber} : '',
			looptable_last  => ($count) ? $temptable[-1]->{itemcallnumber} : '',
		};
	}

    # the header of the table
    $globalline{loopfilter}=\@loopfilter;
    $globalline{limit}   = $limit;
    $globalline{column}  = $column;
    return [(\%globalline)]; #	reference to array of reference to hash
}

1;
__END__