#!/usr/bin/perl

use strict;

my $app = Self->new(
    'PARAMS'        =>  {
        'mode_param'    =>  'action',
        'run_modes'     =>  {
            'AUTOLOAD'      =>  'input_display',
            'display'       =>  'input_display',
            'finalise'      =>  'input_finalise',
            'update'        =>  'input_update'
        },
        'start_mode'    =>  'display'
    }
);
$app->run;

exit 0;


package Self;

BEGIN {
    unshift @INC, '.';
}

use Apache::Session::DB_File;
use Business::CardAccess;
use CGI::Carp;
use Data::Dumper;
use Template;

use base 'CGI::Application';
use strict;

sub setup {
    my $self = shift;
    $self->run_modes( $self->param('run_modes') || { 'start' => 'dump_html' } );
    $self->mode_param( $self->param('mode_param') || 'rm' );
    $self->start_mode( $self->param('start_mode') || 'start' );
    $self->param( 'template' => Template->new({ 'INCLUDE_PATH' => $self->param('tmpl_path') || '../templates' }) );
}

sub input_display {
    my $self = shift;
    my $cgi = $self->query;

    my %session;
    eval {
        my $session_id = $cgi->cookie( -name => 'ecom', -path => '/' );
        tie %session, 'Apache::Session::DB_File', $session_id, { 'FileName' => '.sessions' };
    };
    tie %session, 'Apache::Session::DB_File', undef, { 'FileName' => '.sessions' } if $@;

    $session{'payments'} ||= [
        {
            'index'         =>  0,
            'description'   =>  'One-Time Payment',
            'amount'        =>  0
        }
    ];

    $self->header_props(
        -cookie     =>  $cgi->cookie(
            -name       =>  'ecom',
            -path       =>  '/',
            -value      =>  $session{'_session_id'}
        )
    );

    my $html = '';
    $self->param('template')->process('display.tt2', \%session, \$html);
    untie %session;

    return $html;
}

sub input_update {
    my $self = shift;
    my $cgi = $self->query;

    my %session;
    eval {
        my $session_id = $cgi->cookie( -name => 'ecom', -path => '/' );
        tie %session, 'Apache::Session::DB_File', $session_id, { 'FileName' => '.sessions' };
    };
    croak( 'Cannot retrieve user session ID from client-side cookie' ) if $@;

    $session{'payments'} ||= [];

    my @payments = @{$session{'payments'}};
    foreach (0..$#payments) {
        $cgi->param('description_'.$_, $1) if $cgi->param('description_'.$_) =~ /^([\w\-\ ]+)$/;
        $cgi->param('amount_'.$_, $1) if $cgi->param('amount_'.$_) =~ /^\$?(\d+(?:|\.\d{1,2}))$/;
        splice( 
            @payments,
            $_,
            1, 
            {
                'index'         =>  $_,
                'description'   =>  $cgi->param('description_'.$_),
                'amount'        =>  $cgi->param('amount_'.$_)
            }
        );
        splice(@payments, $_, 1) if defined $cgi->param('delete_'.$_);
    }

    $session{'payments'} = \@payments;

    my $html = '';
    $self->param('template')->process('display.tt2', \%session, \$html);
    untie %session;

    return $html;
}

1;

__END__