#!/usr/bin/perl

# Copyright 2016 PTFS-Europe Ltd
#
# 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>.

=head1 housebound.pl

 Script to handle housebound management for patrons.  This single script
 handles display, creation, deletion and management of profiles and visits.

=cut

use Modern::Perl;
use CGI;
use C4::Auth qw( get_template_and_user );
use C4::Context;
use C4::Output qw( output_and_exit_if_error output_and_exit output_html_with_http_headers );
use DateTime;
use Koha::DateUtils qw( dt_from_string );
use Koha::Libraries;
use Koha::Patrons;
use Koha::Patron::Categories;
use Koha::Patron::HouseboundProfile;
use Koha::Patron::HouseboundVisit;
use Koha::Patron::HouseboundVisits;

my $input = CGI->new;

my ( $template, $loggedinuser, $cookie ) = get_template_and_user(
    {
        template_name   => 'members/housebound.tt',
        query           => $input,
        type            => 'intranet',
        flagsrequired   => { borrowers => 'edit_borrowers' },
    }
);

my @messages;                   # For error messages.
my $method = $input->param('method') // q{};
my $visit_id = $input->param('visit_id') // q{};

# Get patron
my $borrowernumber = $input->param('borrowernumber');
my $logged_in_user = Koha::Patrons->find( $loggedinuser );
my $patron = Koha::Patrons->find($borrowernumber);
output_and_exit_if_error( $input, $cookie, $template, { module => 'members', logged_in_user => $logged_in_user, current_patron => $patron } );

# Get supporting cast
my ( $houseboundprofile, $visit );
if ( $patron ) { # FIXME This test is not needed - output_and_exit_if_error handles it
    $houseboundprofile = $patron->housebound_profile;
}
if ( $visit_id ) {
    $visit = eval {
        return Koha::Patron::HouseboundVisits->find($visit_id);
    };
    push @messages, { type => 'error', code => 'error_on_visit_load' }
        if ( $@ or !$visit );
}

# Main processing
my ( $deliverers, $choosers, $houseboundvisit );

if ( $method eq 'updateconfirm' and $houseboundprofile ) {
    # We have received the input from the profile edit form.  We must save the
    # changes, and return to simple display.
    $houseboundprofile->set({
        day           => scalar $input->param('day')           // q{},
        frequency     => scalar $input->param('frequency')     // q{},
        fav_itemtypes => scalar $input->param('fav_itemtypes') // q{},
        fav_subjects  => scalar $input->param('fav_subjects')  // q{},
        fav_authors   => scalar $input->param('fav_authors')   // q{},
        referral      => scalar $input->param('referral')      // q{},
        notes         => scalar $input->param('notes')         // q{},
    });
    my $success = eval { return $houseboundprofile->store };
    push @messages, { type => 'error', code => 'error_on_profile_store' }
        if ( $@ or !$success );
    $method = undef;
} elsif ( $method eq 'createconfirm' ) {
    # We have received the input necessary to create a new profile.  We must
    # save it, and return to simple display.
    $houseboundprofile = Koha::Patron::HouseboundProfile->new({
        borrowernumber => $patron->borrowernumber,
        day            => scalar $input->param('day')           // q{},
        frequency      => scalar $input->param('frequency')     // q{},
        fav_itemtypes  => scalar $input->param('fav_itemtypes') // q{},
        fav_subjects   => scalar $input->param('fav_subjects')  // q{},
        fav_authors    => scalar $input->param('fav_authors')   // q{},
        referral       => scalar $input->param('referral')      // q{},
        notes          => scalar $input->param('notes')         // q{},
    });
    my $success = eval { return $houseboundprofile->store };
    push @messages, { type => 'error', code => 'error_on_profile_create' }
        if ( $@ or !$success );
    $method = undef;
} elsif ( $method eq 'visit_update_or_create' ) {
    # We want to edit, edit a visit, so we must pass its details.
    $deliverers = Koha::Patrons->search_housebound_deliverers;
    $choosers = Koha::Patrons->search_housebound_choosers;
    $houseboundvisit = $visit;
} elsif ( $method eq 'visit_delete' and $visit ) {
    # We want ot delete a specific visit.
    my $success = eval { return $visit->delete };
    push @messages, { type => 'error', code => 'error_on_visit_delete' }
        if ( $@ or !$success );
    $method = undef;
} elsif ( $method eq 'editvisitconfirm' and $visit ) {
    # We have received input for editing a visit.  We must store and return to
    # simple display.
    $visit->set({
        borrowernumber      => scalar $input->param('borrowernumber')      // q{},
        appointment_date    => dt_from_string($input->param('date') // q{}),
        day_segment         => scalar $input->param('segment')             // q{},
        chooser_brwnumber   => scalar $input->param('chooser')             // q{},
        deliverer_brwnumber => scalar $input->param('deliverer')           // q{},
    });
    my $success = eval { return $visit->store };
    push @messages, { type => 'error', code => 'error_on_visit_store' }
        if ( $@ or !$success );
    $method = undef;
} elsif ( $method eq 'addvisitconfirm' and !$visit ) {
    # We have received input for creating a visit.  We must store and return
    # to simple display.
    my $visit = Koha::Patron::HouseboundVisit->new({
        borrowernumber      => scalar $input->param('borrowernumber')      // q{},
        appointment_date    => dt_from_string($input->param('date') // q{}),
        day_segment         => scalar $input->param('segment')             // q{},
        chooser_brwnumber   => scalar $input->param('chooser')             // q{},
        deliverer_brwnumber => scalar $input->param('deliverer')           // q{},
    });
    my $success = eval { return $visit->store };
    push @messages, { type => 'error', code => 'error_on_visit_create' }
        if ( $@ or !$success );
    $method = undef;
}

# We don't have any profile information, so we must display a creation form.
$method = 'update_or_create' if ( !$houseboundprofile );

# Ensure template has all patron details.
$template->param( patron => $patron );

$template->param(
    housebound_profile => $houseboundprofile,
    visit              => $houseboundvisit,
    messages           => \@messages,
    method             => $method,
    choosers           => $choosers,
    deliverers         => $deliverers,
    houseboundview     => 'on',
);

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

=head1 AUTHOR

Alex Sassmannshausen <alex.sassmannshausen@ptfs-europe.com>

=cut