#!/usr/bin/perl

use strict;
use warnings;
use CGI qw/:standard/;

my @words = ( 'amiko::friend',
          'kafo::coffee',
          'filo::son',
          'kuko::cake',
          'frato::brother',
          'lakto::milk',
          'instruisto::teacher',
          'pano::bread',
          'knabo::boy',
          'sukero::sugar',
          'patro::father',
          'teo::tea',
          'akvo::water',
          'butiko::shop',
          'limonado::lemonade',
          'papero::paper',
          'plumo::pen',
          'taso::cup',
          );

srand ( time() ^ ($$ + ($$ << 15)) );

my $answer = param('answer');
($answer) = ( $answer =~ /^(\w*)$/ );

my $language = param('language');
$language = 'Esperanto' unless $language;

my $last_question = param('last_question');
($last_question) = ($last_question =~ /^(\w*)$/);

my ($esperanto, $english) = split /::/, @words[rand(scalar(@words))];
my $question = sprintf("%s\n", $language eq 'Esperanto' ? $esperanto :
+ $english);

my $match = gradeit( $last_question, $answer );

sub gradeit {
    my $first = shift;
    my $second = shift;
    
    my $together;
    if ($language eq 'Esperanto') {
    $together = join "::", $first, $second;
    } else {
    $together = join "::", $second, $first;
    }

    my $match = "No. $first != $second";
    foreach my $word (@words) {
    if ($word eq $together) {
        $match = "Correct. $first = $second";
        last;
    }
    }

    return $match;
}

param('last_question', $question);
print header,
    start_html( -title => 'Esperanto Quiz' ),
    h1('Esperanto Quiz'),
    p( b( 'Question: '),
       'What does ', 
       b($question),
       ' mean?' ),
    p( $match ),
    start_form,
    textfield( -name => 'answer',
           -size => 40,
           -maxlength => 40 ),
    br, 
    radio_group( -name => 'language',
         -values => ['English', 'Esperanto'],
         -default => 'Esperanto', 
         -linebreak => 'true'), 
    hidden( 'last_question' ),
    submit,
    end_form,
    end_html;