# The LearningOnline Network with CAPA
# option list style responses
# 2/21 Guy
package Apache::optionresponse;
use strict;
use Apache::response;

sub BEGIN {
  &Apache::lonxml::register('Apache::optionresponse',('optionresponse'));
}

sub start_optionresponse {
  my ($target,$token,$tagstack,$parstack,$parser,$safeeval,$style)=@_;
  my $result='';
  #when in a radiobutton response use these
  &Apache::lonxml::register('Apache::optionresponse',('foilgroup','foil','conceptgroup'));
  push (@Apache::lonxml::namespace,'optionresponse');
  my $id = &Apache::response::start_response($parstack,$safeeval);
  if ($target eq 'edit') {
    $result.=&Apache::edit::start_table($token).
      "<tr><td>Multiple Option Response Question</td><td>Delete:".
	&Apache::edit::deletelist($target,$token)
	  ."</td><td>&nbsp;</td></tr><tr><td colspan=\"3\">\n";
    $result.=&Apache::edit::text_arg('Max Number Of Foils:','max',$token,'4').
      "</td></tr>";
    $result.="<tr><td colspan=\"3\">\n";
  }
  if ($target eq 'modified') {
    my $constructtag=&Apache::edit::get_new_args($token,$parstack,
						 $safeeval,'max');
    if ($constructtag) { $result = &Apache::edit::rebuild_tag($token); }
  }
  if ($target eq 'meta') {
    $result=&Apache::response::meta_package_write('optionresponse');
  }
  return $result;
}

sub end_optionresponse {
  my ($target,$token,$tagstack,$parstack,$parser,$safeeval,$style)=@_;
  &Apache::response::end_response;
  pop @Apache::lonxml::namespace;
  my $result;
  if ($target eq 'edit') { $result=&Apache::edit::end_table(); }
  return $result;
}

%Apache::response::foilgroup={};
sub start_foilgroup {
  my ($target,$token,$tagstack,$parstack,$parser,$safeeval,$style)=@_;

  my $result='';
  %Apache::response::foilgroup={};
  $Apache::optionresponse::conceptgroup=0;
  &Apache::response::setrandomnumber();
  if ($target eq 'edit') {
    my $optionlist="<option></option>\n";
    my $option;
    my @opt;
    eval '@opt ='. &Apache::lonxml::get_param('options',$parstack,$safeeval);
    my $count=1;
    foreach $option (@opt) {
      $optionlist.="<option value=\"$count\">$option</option>\n";
      $count++;
    }
    my $insertlist=&Apache::edit::insertlist($target,$token);
    $result.=&Apache::edit::start_table($token);
    $result.= (<<ENDTABLE);
      <tr><td>Select Options</td>
        <td>
	  Add new Option: <input type="text" name="$Apache::lonxml::curdepth.options" />
        </td>
        <td>Delete an Option:
	  <select name="$Apache::lonxml::curdepth.deleteopt">$optionlist</select>
        </td>
     </tr>
     <tr><td colspan="3">$insertlist<br />
ENDTABLE
  }
  if ($target eq 'modified') {
    my @options;
    my $optchanged=0;
    eval '@options ='.&Apache::lonxml::get_param('options',$parstack,$safeeval);
    if ($ENV{"form.$Apache::lonxml::curdepth.deleteopt"}) {
      my $delopt=$ENV{"form.$Apache::lonxml::curdepth.deleteopt"};
      &Apache::lonxml::debug("Deleting :$delopt:");
      splice(@options,$delopt-1,1);
      $optchanged=1;
    }
    if ($ENV{"form.$Apache::lonxml::curdepth.options"}) {
      my $newopt = $ENV{"form.$Apache::lonxml::curdepth.options"};
      if ($options[0]) {
	push(@options,$newopt);
      } else {
	$options[0]=$newopt;
      }
      $optchanged=1;
    }
    if ($optchanged) {
      $result = "<foilgroup options=\"(";
      foreach my $option (@options) {
	$option=~s/\'/\\\'/;
	&Apache::lonxml::debug("adding option :$option:");
	$result .="'".$option."',";
      }
      chop $result;
      $result.=')">';
    } # else nothing changed so just use the default mechanism
  }
  return $result;
}

sub end_foilgroup {
  my ($target,$token,$tagstack,$parstack,$parser,$safeeval,$style)=@_;
  
  my $result;
  if ($target eq 'grade' || $target eq 'web' || $target eq 'answer') {
    my $name;
    my ($count,$max) = &getfoilcounts($parstack,$safeeval);
    if ($count>$max) { $count=$max } 
    &Apache::lonxml::debug("Count is $count from $max");
    my @opt;
    eval '@opt ='.&Apache::lonxml::get_param('options',$parstack,$safeeval);
    &Apache::lonxml::debug("Options are $#opt");
    if ($target eq 'web') {
      $result.=&displayfoils($count,@opt);
    } elsif ( $target eq 'answer') {
      $result.=&displayanswers($count,@opt);
    } elsif ( $target eq 'grade') {
      if ( defined $ENV{'form.submitted'}) {
	my @whichopt = &whichfoils($count);
	my $temp=1;my $name;
	my %responsehash;
	my $right=0;
	my $wrong=0;
	my $ignored=0;
	foreach $name (@whichopt) {
	  my $response = $ENV{'form.HWVAL_'.$Apache::inputtags::response['-1'].":$temp"};
	  $responsehash{$name}=$response;
	  if ( $response =~ /[^\s]/) {
	    &Apache::lonxml::debug("submitted a $response<br />\n");
	    my $value=$Apache::response::foilgroup{$name.'.value'};
	    if ($value eq $response) {$right++;} else {$wrong++;}
	  } else {
	    $ignored++;
	  }
	  $temp++;
	}
	my $id = $Apache::inputtags::response['-1'];
	$Apache::lonhomework::results{"resource.$Apache::inputtags::part.$id.submission"}=&Apache::lonnet::hash2str(%responsehash);
	&Apache::lonxml::debug("Got $right right and $wrong wrong, and $ignored were ignored");
	if ($wrong==0 && $ignored==0) {
	  $Apache::lonhomework::results{"resource.$Apache::inputtags::part.$id.awarddetail"}='EXACT_ANS';
	} else {
	  $Apache::lonhomework::results{"resource.$Apache::inputtags::part.$id.awarddetail"}='INCORRECT';
	}
      }
    }
  } elsif ($target eq 'edit') {
    $result.=&Apache::edit::end_table();
  }
  return $result;
}

sub getfoilcounts {
  my ($parstack,$safeeval)=@_;
  my $max = &Apache::lonxml::get_param('max',$parstack,$safeeval,'-2');
  # +1 since instructors will count from 1
  my $count = $#{ $Apache::response::foilgroup{'names'} }+1;
  return ($count,$max);
}

sub whichfoils {
  my ($max)=@_;
  my @names = @{ $Apache::response::foilgroup{'names'} };
  my @whichopt =();
  while ((($#whichopt+1) < $max) && ($#names > -1)) {
    &Apache::lonxml::debug("Have $#whichopt max is $max");
    my $aopt=int(rand($#names+1));
    &Apache::lonxml::debug("From $#whichopt $max $#names elms, picking $aopt");
    $aopt=splice(@names,$aopt,1);
    &Apache::lonxml::debug("Picked $aopt");
    push (@whichopt,$aopt);
  }
  return @whichopt;
}

sub displayanswers {
  my ($max,@opt)=@_;
  my @names = @{ $Apache::response::foilgroup{'names'} };
  my @whichopt = &whichfoils($max);
  my $result=&Apache::response::answer_header('optionresponse');
  foreach my $name (@whichopt) {
    $result.=&Apache::response::answer_part('optionresponse',
		     $Apache::response::foilgroup{$name.'.value'})
  }
  $result.=&Apache::response::answer_footer('optionresponse');
  return $result;
}

sub displayfoils {
  my ($max,@opt)=@_;
  my @names = @{ $Apache::response::foilgroup{'names'} };
  my @truelist;
  my @falselist;
  my $result;
  my $name;
  my @whichopt = &whichfoils($max);
  my $optionlist="<option></option>\n";
  my $option;
  foreach $option (@opt) {
    $optionlist.="<option>$option</option>\n";
  }
  if (($Apache::lonhomework::history{"resource.$Apache::inputtags::part.solved"} =~ /^correct/)  || ($Apache::inputtags::status[-1] eq  'SHOW_ANSWER')) {
    foreach $name (@whichopt) {
      $result.="<br />".$Apache::response::foilgroup{$name.'.value'}.
	":".$Apache::response::foilgroup{$name.'.text'}."\n";
    }
  } else {
    my $temp=1;
    foreach $name (@whichopt) {
      $result.="<br /><select name=\"HWVAL_$Apache::inputtags::response['-1']:$temp\">"
	.$optionlist
	  ."</select>\n".$Apache::response::foilgroup{$name.'.text'}."\n";
      $temp++;
    }
  }
  return $result."<br />";
}


sub start_conceptgroup {
  my ($target,$token,$tagstack,$parstack,$parser,$safeeval,$style)=@_;
  $Apache::optionresponse::conceptgroup=1;
  %Apache::response::conceptgroup={};
  my $result;
  if ($target eq 'edit') {
    $result.=&Apache::edit::tag_start($target,$token,"Concept Grouped Foils");
    $result.=&Apache::edit::text_arg('Concept:','concept',$token,'50')."</td></tr>";
    $result.="<tr><td colspan=\"3\">\n";
  }
  if ($target eq 'modified') {
    my $constructtag=&Apache::edit::get_new_args($token,$parstack,$safeeval,'concept');
    if ($constructtag) { $result = &Apache::edit::rebuild_tag($token); }
  }
  return $result;
}

sub end_conceptgroup {
  my ($target,$token,$tagstack,$parstack,$parser,$safeeval,$style)=@_;
  $Apache::optionresponse::conceptgroup=0;
  my $result='';
  if ($target eq 'web' || $target eq 'grade' || $target eq 'answer') {
    #if not there aren't any foils to display and thus no question
    if (defined(@{ $Apache::response::conceptgroup{'names'} })) {
      my @names = @{ $Apache::response::conceptgroup{'names'} };
      my $pick=int rand $#names+1;
      my $name=$names[$pick];
      push @{ $Apache::response::foilgroup{'names'} }, $name;
      $Apache::response::foilgroup{"$name.value"} =  $Apache::response::conceptgroup{"$name.value"};
      $Apache::response::foilgroup{"$name.text"} =  $Apache::response::conceptgroup{"$name.text"};
      my $concept = &Apache::lonxml::get_param('concept',$parstack,$safeeval);
      $Apache::response::foilgroup{"$name.concept"} = $concept;
      &Apache::lonxml::debug("Selecting $name in $concept");
    }
  }
  if ($target eq 'edit') {
    $result=&Apache::edit::end_table();
  }
  return $result;
}

sub insert_conceptgroup {
  my $result="\n\t\t<conceptgroup concept=\"\">".&insert_foil()."\n\t\t</conceptgroup>\n";
  return $result;
}

sub start_foil {
  my ($target,$token,$tagstack,$parstack,$parser,$safeeval,$style)=@_;
  my $result='';
  if ($target eq 'web') {
    &Apache::lonxml::startredirection;
  } elsif ($target eq 'edit') {
    $result=&Apache::edit::tag_start($target,$token,"Foil");
    my $level='-2';
    if ($$tagstack['-2'] eq 'conceptgroup') { $level = '-3'; }
    my @opt;
    eval '@opt ='.&Apache::lonxml::get_param('options',$parstack,$safeeval,$level);
    $result.=&Apache::edit::text_arg('Name:','name',$token);
    $result.= &Apache::edit::select_or_text_arg('Correct Option:','value',['unused',(@opt)],$token,'15');
    $result .= '</td></tr><tr><td colspan="3">';
  } elsif ($target eq 'modified') {
    my $constructtag=&Apache::edit::get_new_args($token,$parstack,$safeeval,'value','name');
    if ($constructtag) { $result = &Apache::edit::rebuild_tag($token); }
  }
  return $result;
}

sub end_foil {
  my ($target,$token,$tagstack,$parstack,$parser,$safeeval,$style)=@_;
  my $text ='';
  my $result = '';
  if ($target eq 'web') { $text=&Apache::lonxml::endredirection; }
  if ($target eq 'web' || $target eq 'grade' || $target eq 'answer') {
    my $value = &Apache::lonxml::get_param('value',$parstack,$safeeval);
    if ($value ne 'unused') {
      my $name = &Apache::lonxml::get_param('name',$parstack,$safeeval);
      &Apache::lonxml::debug("Got a name of :$name:");
      if (!$name) { $name=$Apache::lonxml::curdepth; }
      &Apache::lonxml::debug("Using a name of :$name:");
      if ( $Apache::optionresponse::conceptgroup ) {
	push @{ $Apache::response::conceptgroup{'names'} }, $name;
	$Apache::response::conceptgroup{"$name.value"} = $value;
	$Apache::response::conceptgroup{"$name.text"} = $text;	
      } else {
	push @{ $Apache::response::foilgroup{'names'} }, $name;
	$Apache::response::foilgroup{"$name.value"} = $value;
	$Apache::response::foilgroup{"$name.text"} = $text;
      }
    }
  }
  if ($target eq 'edit') {
    $result.= &Apache::edit::tag_end($target,$token,'');
  }
  return $result;
}

sub insert_foil {
  return '
<foil name="" value="unused">
<startouttext />
<endouttext />
</foil>';
}
1;
__END__