#!/usr/bin/perl
#
# This code has been modified by Trendsetters (originally from opac-user.pl)
# This code has been modified by rch
# Parts Copyright 2010-2011, ByWater Solutions (those related to username/password auth)
#
# 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>.

# We're going to authenticate a self-check user.  we'll add a flag to borrowers 'selfcheck'
#
# We're not in a controlled environment; we never trust the user.
#
# The checkout permission comes form the CGI cookie/session of a staff user.
# The patron is not really logging in here in the same way as they do on the
# rest of the OPAC.  So don't confuse loggedinuser with the patron user.
# The patron id/cardnumber is retrieved from the JWT

use Modern::Perl;

use CGI qw ( -utf8 );

use C4::Auth qw( in_iprange get_template_and_user checkpw );
use C4::Circulation qw( barcodedecode AddReturn CanBookBeIssued AddIssue CanBookBeRenewed AddRenewal );
use C4::Reserves;
use C4::Output qw( output_html_with_http_headers );
use C4::Members;
use Koha::DateUtils qw( dt_from_string );
use Koha::Acquisition::Currencies;
use Koha::Items;
use Koha::Patrons;
use Koha::Patron::Images;
use Koha::Patron::Messages;
use Koha::Plugins;
use Koha::Token;

my $query = CGI->new;

unless (C4::Context->preference('WebBasedSelfCheck')) {
    # redirect to OPAC home if self-check is not enabled
    print $query->redirect("/cgi-bin/koha/opac-main.pl");
    exit;
}

unless ( in_iprange(C4::Context->preference('SelfCheckAllowByIPRanges')) ) {
    # redirect to OPAC home if self-checkout not permitted from current IP
    print $query->redirect("/cgi-bin/koha/opac-main.pl");
    exit;
}

if (C4::Context->preference('AutoSelfCheckAllowed'))
{
    my $AutoSelfCheckID = C4::Context->preference('AutoSelfCheckID');
    my $AutoSelfCheckPass = C4::Context->preference('AutoSelfCheckPass');
    $query->param(-name=>'userid',-values=>[$AutoSelfCheckID]);
    $query->param(-name=>'password',-values=>[$AutoSelfCheckPass]);
    $query->param(-name=>'koha_login_context',-values=>['sco']);
}
$query->param(-name=>'sco_user_login',-values=>[1]);

my ( $template, $loggedinuser, $cookie ) = get_template_and_user(
    {
        template_name   => "sco/sco-main.tt",
        flagsrequired   => { self_check => "self_checkout_module" },
        query           => $query,
        type            => "opac",
    }
);

# Get the self checkout timeout preference, or use 120 seconds as a default
my $selfchecktimeout = 120000;
if (C4::Context->preference('SelfCheckTimeout')) { 
    $selfchecktimeout = C4::Context->preference('SelfCheckTimeout') * 1000;
}
$template->param( SelfCheckTimeout => $selfchecktimeout );

# Checks policy laid out by SCOAllowCheckin, defaults to 'on' if preference is undefined
my $allowselfcheckreturns = 1;
if (defined C4::Context->preference('SCOAllowCheckin')) {
    $allowselfcheckreturns = C4::Context->preference('SCOAllowCheckin');
}

my $issuerid = $loggedinuser;
my ( $op, $patronlogin, $patronpw, $barcode, $confirmed, $newissues, $load_checkouts ) = (
    $query->param("op")             || '',
    $query->param("patronlogin")    || '',
    $query->param("patronpw")       || '',
    $query->param("barcode")        || '',
    $query->param("confirmed")      || '',
    $query->param("newissues")      || '',
    $query->param("load_checkouts") || '',
);

my $jwt = $query->cookie('JWT');
if ($op eq "logout") {
    $template->param( loggedout => 1 );
    $query->param( patronlogin => undef, patronpw => undef );
    undef $jwt;
}

$barcode = barcodedecode( $barcode ) if $barcode;

my @newissueslist = split /,/, $newissues;
my $issuenoconfirm = 1; #don't need to confirm on issue.
my $issuer   = Koha::Patrons->find( $issuerid )->unblessed;

my $patronid = $jwt ? Koha::Token->new->decode_jwt({ token => $jwt }) : undef;
unless ( $patronid ) {
    if ( C4::Context->preference('SelfCheckoutByLogin') ) {
        ( undef, $patronid ) = checkpw( $patronlogin, $patronpw );
    }
    else {    # People should not do that unless they know what they are doing!
              # SelfCheckAllowByIPRanges MUST be configured
        $patronid = $query->param('patronid');
    }
    $jwt = Koha::Token->new->generate_jwt({ id => $patronid }) if $patronid;
}

my $patron;
my $anonymous_patron = C4::Context->preference('AnonymousPatron');
if ( $patronid ) {
    Koha::Plugins->call( 'patron_barcode_transform', \$patronid );
    $patron = Koha::Patrons->find( { cardnumber => $patronid } );

    # redirect to OPAC home if user is trying to log in as the anonymous patron
    if ( $patron && ( $patron->borrowernumber eq $anonymous_patron ) ) {
        print $query->redirect("/cgi-bin/koha/opac-main.pl");
        exit;
    }
}

undef $jwt unless $patron;

my $branch = $issuer->{branchcode};
my $confirm_required = 0;
my $return_only = 0;

if ( $patron && $op eq "returnbook" && $allowselfcheckreturns ) {
    my $success = 1;


    my $item = Koha::Items->find( { barcode => $barcode } );
    if ( $success && C4::Context->preference("CircConfirmItemParts") ) {
        if ( defined($item)
            && $item->materials )
        {
            $success = 0;
        }
    }

    if ($success) {
        # Patron cannot checkin an item they don't own
        $success = 0
          unless $patron->checkouts->find( { itemnumber => $item->itemnumber } );
    }

    if ( $success ) {
        ($success) = AddReturn( $barcode, $branch )
    }

    $template->param( returned => $success );
}
elsif ( $patron && ( $op eq 'checkout' ) ) {

    my $item = Koha::Items->find( { barcode => $barcode } );
    my $impossible  = {};
    my $needconfirm = {};
    ( $impossible, $needconfirm ) = CanBookBeIssued(
        $patron,
        $barcode,
        undef,
        0,
        C4::Context->preference("AllowItemsOnHoldCheckoutSCO")
    );
    my $issue_error;
    if ( $confirm_required = scalar keys %$needconfirm ) {
        for my $error ( qw( UNKNOWN_BARCODE max_loans_allowed ISSUED_TO_ANOTHER NO_MORE_RENEWALS NOT_FOR_LOAN DEBT WTHDRAWN RESTRICTED RESERVED ITEMNOTSAMEBRANCH EXPIRED DEBARRED CARD_LOST GNA INVALID_DATE UNKNOWN_BARCODE TOO_MANY DEBT_GUARANTEES DEBT_GUARANTORS USERBLOCKEDOVERDUE PATRON_CANT PREVISSUE NOT_FOR_LOAN_FORCING ITEM_LOST ADDITIONAL_MATERIALS ) ) {
            if ( $needconfirm->{$error} ) {
                $issue_error = $error;
                $confirmed = 0;
                last;
            }
        }
    }

    if (scalar keys %$impossible) {

        my $issue_error = (keys %$impossible)[0]; # FIXME This is wrong, we assume only one error and keys are not ordered
        my $title = ( $item ) ? $item->biblio->title : '';

        $template->param(
            impossible                => $issue_error,
            "circ_error_$issue_error" => 1,
            title                     => $title,
            hide_main                 => 1,
        );
        if ($issue_error eq 'DEBT') {
            $template->param(DEBT => $impossible->{DEBT});
        }
        if ( $issue_error eq "NO_MORE_RENEWALS" ) {
            $return_only = 1;
            $template->param(
                returnitem => 1,
                barcode    => $barcode,
            );
        }
    } elsif ( $needconfirm->{RENEW_ISSUE} ){
        $template->param(
                renew               => 1,
                barcode             => $barcode,
                confirm             => 1,
                confirm_renew_issue => 1,
                hide_main           => 1,
        );
    } elsif ( $confirm_required && !$confirmed ) {
        $template->param(
            impossible                => 1,
            "circ_error_$issue_error" => 1,
            hide_main                 => 1,
        );
        if ($issue_error eq 'DEBT') {
            $template->param(DEBT => $needconfirm->{DEBT});
        }
    } else {
        if ( $confirmed || $issuenoconfirm ) {    # we'll want to call getpatroninfo again to get updated issues.
            my ( $hold_existed, $item );
            if ( C4::Context->preference('HoldFeeMode') eq 'any_time_is_collected' ) {
                # There is no easy way to know if the patron has been charged for this item.
                # So we check if a hold existed for this item before the check in
                $item = Koha::Items->find({ barcode => $barcode });
                $hold_existed = Koha::Holds->search(
                    {
                        -and => {
                            borrowernumber => $patron->borrowernumber,
                            -or            => {
                                biblionumber => $item->biblionumber,
                                itemnumber   => $item->itemnumber
                            }
                        }
                    }
                )->count;
            }

            my $new_issue = AddIssue( $patron, $barcode );
            $template->param( issued => 1, new_issue => $new_issue );
            push @newissueslist, $barcode;

            if ( $hold_existed ) {
                my $dtf = Koha::Database->new->schema->storage->datetime_parser;
                $template->param(
                    # If the hold existed before the check in, let's confirm that the charge line exists
                    # Note that this should not be needed but since we do not have proper exception handling here we do it this way
                    patron_has_hold_fee => Koha::Account::Lines->search(
                        {
                            borrowernumber  => $patron->borrowernumber,
                            debit_type_code => 'RESERVE',
                            description     => $item->biblio->title,
                            date            => $dtf->format_date(dt_from_string)
                        }
                      )->count,
                );
            }
        } else {
            $confirm_required = 1;
            $template->param(
                confirm    => "Issuing title: " . $item->biblio->title,
                barcode    => $barcode,
                hide_main  => 1,
            );
        }
    }
} # $op

if ( $patron && ( $op eq 'renew' ) ) {
    my $item = Koha::Items->find({ barcode => $barcode });

    if ( $patron->checkouts->find( { itemnumber => $item->itemnumber } ) ) {
        my ($status,$renewerror) = CanBookBeRenewed( $patron, $item->checkout );
        if ($status) {
            AddRenewal(
                {
                    borrowernumber => $patron->borrowernumber,
                    itemnumber     => $item->itemnumber,
                    seen           => 1
                }
            );
            push @newissueslist, $barcode;
            $template->param( renewed => 1 );
        }
    } else {
        $template->param( renewed => 0 );
    }
}

if ( $patron) {
    my $borrowername = sprintf "%s %s", ($patron->firstname || ''), ($patron->surname || '');
    my @checkouts;
    my $pending_checkouts = $patron->pending_checkouts;
    if ( C4::Context->preference('SCOLoadCheckoutsByDefault') || $load_checkouts ) {
        while ( my $c = $pending_checkouts->next ) {
            my $checkout = $c->unblessed_all_relateds;
            my ( $can_be_renewed, $renew_error ) = CanBookBeRenewed( $patron, $c );
            $checkout->{can_be_renewed} = $can_be_renewed;    # In the future this will be $checkout->can_be_renewed
            $checkout->{renew_error}    = $renew_error;
            $checkout->{overdue}        = $c->is_overdue;
            push @checkouts, $checkout;
        }
    }

    my $show_priority;
    for ( C4::Context->preference("OPACShowHoldQueueDetails") ) {
        m/priority/ and $show_priority = 1;
    }

    my $account = $patron->account;
    my $total = $account->balance;
    my $accountlines = $account->lines;

    my $holds = $patron->holds;
    my $waiting_holds_count = 0;

    while(my $hold = $holds->next) {
        $waiting_holds_count++ if $hold->is_waiting;
    }

    $template->param(
        validuser => 1,
        borrowername => $borrowername,
        issues_count => scalar(@checkouts) || $pending_checkouts->count(),
        ISSUES => \@checkouts,
        HOLDS => $holds,
        newissues => join(',',@newissueslist),
        patronlogin => $patronlogin,
        patronpw => $patronpw,
        waiting_holds_count => $waiting_holds_count,
        noitemlinks => 1 ,
        load_checkouts => $load_checkouts,
        borrowernumber => $patron->borrowernumber,
        SuspendHoldsOpac => C4::Context->preference('SuspendHoldsOpac'),
        AutoResumeSuspendedHolds => C4::Context->preference('AutoResumeSuspendedHolds'),
        howpriority   => $show_priority,
        ACCOUNT_LINES => $accountlines,
        total => $total,
    );

    my $patron_messages = Koha::Patron::Messages->search(
        {
            borrowernumber => $patron->borrowernumber,
            message_type => 'B',
        }
    );
    $template->param(
        patron_messages => $patron_messages,
        opacnote => $patron->opacnote,
    );

    $template->param(
        nofines => 1,

    );
    if (C4::Context->preference('ShowPatronImageInWebBasedSelfCheck')) {
        my $patron_image = $patron->image;
        $template->param(
            display_patron_image => 1,
            csrf_token           => Koha::Token->new->generate_csrf( { session_id => scalar $query->cookie('CGISESSID') . $patron->cardnumber, id => $patron->userid } ),
        ) if $patron_image;
    }
} else {
    $template->param(
        nouser     => $patronid,
    );
}

$cookie = $query->cookie(
    -name => 'JWT',
    -value => $jwt // '',
    -expires => $jwt ? '+1d' : '',
    -HttpOnly => 1,
    -secure => ( C4::Context->https_enabled() ? 1 : 0 ),
    -sameSite => 'Lax'
);

$template->param(patronid => $patronid);

output_html_with_http_headers $query, $cookie, $template->output, undef, { force_no_caching => 1 };