# The LearningOnline Network with CAPA
# input  definitons
# 2/19 Guy 

package Apache::inputtags;
use strict;

sub BEGIN {
  &Apache::lonxml::register('Apache::inputtags',('textarea','textline','datasubmission'));
}


sub initialize_inputtags {
  # list of current input ids
  @Apache::inputtags::input=();
  # list of all input ids seen in this problem
  @Apache::inputtags::inputlist=();
  # list of all current response ids
  @Apache::inputtags::response=();
  #list of all response ids seen in this problem
  @Apache::inputtags::responselist=();
  # id of current part, 0 means that no part is current (inside <problem> only
  $Apache::inputtags::part='';
  # list of problem date statuses, the first element is for <problem> 
  #if there is a second element it is for the current <part>
  @Apache::inputtags::status=();
  #hash of defined params for the current response
  %Apache::inputtags::params=();
}

sub start_input {
  my ($parstack,$safeeval)=@_;
  my $id = &Apache::lonxml::get_param('id',$parstack,$safeeval);
  push (@Apache::inputtags::input,$id);
  push (@Apache::inputtags::inputlist,$id);
  return $id;
}

sub end_input {
  pop @Apache::inputtags::input;
  return '';
}

sub start_textarea {
  my ($target,$token,$tagstack,$parstack,$parser,$safeeval)=@_;
  my $result = "";
  my $id = &start_input($parstack,$safeeval);
  if ($target eq 'web') {
    my $oldresponse = $Apache::lonhomework::history{"resource.$Apache::inputtags::part.$Apache::inputtags::response['-1'].submission"};
    my $cols = &Apache::lonxml::get_param('cols',$parstack,$safeeval);
    if ( $cols eq '') { $cols = 80; }
    my $rows = &Apache::lonxml::get_param('rows',$parstack,$safeeval);
    if ( $rows eq '') { $rows = 10; }
    $result= '<textarea name="HWVAL'.$Apache::inputtags::response['-1'].'" '.
      "rows=\"$rows\" cols=\"$cols\">".$oldresponse;
    if ($oldresponse ne '') {
      #get rid of any startup text if the user has already responded
      &Apache::lonxml::get_all_text("/textarea",$$parser[$#$parser]);
    }
  }
  return $result;
}

sub end_textarea {
  my ($target,$token,$tagstack,$parstack,$parser,$safeeval)=@_;
  if ($target eq 'web') {
    return "</textarea>";
  } 
  &end_input;
  return '';
}

sub start_textline {
  my ($target,$token,$tagstack,$parstack,$parser,$safeeval)=@_;
  my $result = "";
  if ($target eq 'web') {
    my $size = &Apache::lonxml::get_param('size',$parstack,$safeeval);
    if ($size eq '') { $size=20; }
    my $oldresponse = $Apache::lonhomework::history{"resource.$Apache::inputtags::part.$Apache::inputtags::response['-1'].submission"};
    $result= '<input type="text" name="HWVAL'.$Apache::inputtags::response['-1'].'" value="'.$oldresponse.'" size="'.$size.'" />';
  }
  if ($target eq 'edit') {
    $result.=&Apache::edit::tag_start($target,$token,&Apache::lonxml::description($token));
    $result.=&Apache::edit::text_arg('Size:','size',$token,'5')."</td></tr>";
    $result.=&Apache::edit::end_table;
  }
  if ($target eq 'modified') {
    my $constructtag=&Apache::edit::get_new_args($token,$parstack,$safeeval,'size');
    if ($constructtag) { $result = &Apache::edit::rebuild_tag($token); }
  }
  return $result;
}

sub end_textline {
  my ($target,$token,$tagstack,$parstack,$parser,$safeeval)=@_;
  if ($target eq 'edit') { return ('','no'); }
  return "";
}

sub start_datasubmission {
  return '';
}

sub end_datasubmission {
  my ($target,$token,$tagstack,$parstack,$parser,$safeeval)=@_;
  if ( $target == 'web' ) {
    return '<input type="submit" name="submit" value="Submit All Data" />';
  }
  return '';
}

sub finalizeawards {
  my $result='';
  my $award;
  if ($#_ == '-1') { $result = "NO_RESPONSE"; }
  if ($result eq '' ) {
    foreach $award (@_) { if ($award eq '') {$result='MISSING_ANSWER'; last;}}
  }
  if ($result eq '' ) {
    foreach $award (@_) { if ($award eq 'ERROR') {$result='ERROR'; last;}}
  }
  if ($result eq '' ) {
    foreach $award (@_) { if ($award eq 'NO_RESPONSE') {$result='NO_RESPONSE'; last;} }
  }

  if ($result eq '' ) {
    foreach $award (@_) { 
      if ($award eq 'UNIT_FAIL' ||
	  $award eq 'NO_UNIT' ||
	  $award eq 'UNIT_NOTNEEDED') {
	$result=$award; last;
      }
    }
  }
  if ($result eq '' ) {
    foreach $award (@_) { 
      if ($award eq 'WANTED_NUMERIC' || 
	  $award eq 'BAD_FORMULA') {$result=$award; last;}
    }
  }
  if ($result eq '' ) {
    foreach $award (@_) { if ($award eq 'SIG_FAIL') {$result=$award; last;} }
  }
  if ($result eq '' ) {
    foreach $award (@_) { if ($award eq 'INCORRECT') {$result=$award; last;} }
  }
  if ($result eq '' ) {
    foreach $award (@_) { if ($award eq 'SUBMITTED') {$result=$award; last;} }
  }
  if ($result eq '' ) {
    foreach $award (@_) { if ($award eq 'APPROX_ANS') {$result=$award; last;} }
  }
  if ($result eq '' ) { $result='EXACT_ANS'; }
  return $result
}

sub decideoutput {
  my ($award,$solved)=@_;
  my $message='';
  my $button=0;
  if      ($solved =~ /^correct/) {
    $message = "<b>You are correct.</b> Your receipt is ".
      &Apache::lonnet::receipt;
    $button=0;
  } elsif ($solved =~ /^excused/) {
    $message = "<b>You are excused from the problem.</b>";
    $button=0;
  } elsif ($award eq 'EXACT_ANS' || $award eq 'APPROX_ANS' ) {
    if ($solved =~ /^incorrect/ || $solved eq '') {
      $message = "Incorrect";
      $button=1;
    } else {
      $message = "<b>You are correct.</b> Your receipt is ".
	&Apache::lonnet::receipt;
      $button=0;
    }
  } elsif ($award eq 'NO_RESPONSE') {
    $message = '';
    $button=1;
  } elsif ($award eq 'MISSING_ANSWER') {
    $message = 'Some parts were not submitted';
    $button = 1;
  } elsif ($award eq 'WANTED_NUMERIC') {
    $message = "This question expects a numeric answer";
    $button=1;
  } elsif ($award eq 'SIG_FAIL') {
    $message = "Please adjust significant figures.";# you provided %s significant figures";
    $button=1;
  } elsif ($award eq 'UNIT_FAIL') {
    $message = "Units incorrect."; #Computer reads units as %s";
    $button=1;
  } elsif ($award eq 'UNIT_NOTNEEDED') {
    $message = "Only a number required.";# Computer reads units of %s";
    $button=1;
  } elsif ($award eq 'NO_UNIT') {
    $message = "Units required";
    $button=1;
  } elsif ($award eq 'BAD_FORMULA') {
    $message = "Unable to understand formula";
    $button=1;
  } elsif ($award eq 'INCORRECT') {
    $message = "Incorrect";
    $button=1;
  } elsif ($award eq 'SUBMITTED') {
    $message = "Your submission has been recorded.";
    $button=1;
  } else {
    $message = "Unknown message: $award";
    $button=1;
  }
  return ($button,$message);
}

sub setgradedata {
  my ($award,$id) = @_;
  if ( $award eq 'APPROX_ANS' || $award eq 'EXACT_ANS' ) {
    $Apache::lonhomework::results{"resource.$id.tries"} =
      $Apache::lonhomework::history{"resource.$id.tries"} + 1;
    $Apache::lonhomework::results{"resource.$id.solved"} =
      'correct_by_student';
    $Apache::lonhomework::results{"resource.$id.awarded"} = '1';
  } elsif ( $award eq 'INCORRECT' ) {
    $Apache::lonhomework::results{"resource.$id.tries"} =
      $Apache::lonhomework::history{"resource.$id.tries"} + 1;
    $Apache::lonhomework::results{"resource.$id.solved"} =
      'incorrect_attempted';
  } elsif ( $award eq 'SUBMITTED' ) {
    $Apache::lonhomework::results{"resource.$id.tries"} =
      $Apache::lonhomework::history{"resource.$id.tries"} + 1;
    $Apache::lonhomework::results{"resource.$id.solved"} =
      'ungraded_attempted';
  } else {
    $Apache::lonhomework::results{"resource.$id.solved"} =
      'incorrect_attempted';
  }
  $Apache::lonhomework::results{"resource.$id.award"} = $award;
}

sub grade {
  my ($target) = @_;
  my $id = $Apache::inputtags::part;
#  my $result='';
  my $response='';
  if ( $target == 'web' ) {
    if ( defined $ENV{'form.submitted'}) {
      my @awards = ();
      &Apache::lonxml::debug("$#Apache::inputtags::responselist");
      foreach $response (@Apache::inputtags::responselist) {
	&Apache::lonxml::debug("looking for response.$id.$response.awarddetail");
	my $value=$Apache::lonhomework::results{"resource.$id.$response.awarddetail"};
	if ( $value ne '' ) {
	  &Apache::lonxml::debug("keeping $value from $response for $id");
	  push (@awards,$value);
	} else {
	  &Apache::lonxml::debug("skipping $value from $response for $id");
	}
      }
      my $finalaward = &finalizeawards(@awards);
      &Apache::lonxml::debug("final award $finalaward");
      &setgradedata($finalaward,$id);
    }
  }
  return '';
}

sub gradestatus {
  my ($id) = @_;
  my $showbutton = 1;
  my $message = '';
  my $trystr='';
  my $button='';
  
  my $status = $Apache::inputtags::status['-1'];
  &Apache::lonxml::debug("gradestatus has :$status:");
  if ( $status ne 'CLOSED' ) {  
    my $award = $Apache::lonhomework::history{"resource.$id.award"};
    my $solved = $Apache::lonhomework::history{"resource.$id.solved"};
    &Apache::lonxml::debug("Found Award |$award|$solved|");
    if ( $award ne '' ) {
      &Apache::lonxml::debug('Getting message');
      ($showbutton,$message) = &decideoutput($award,$solved);
      $message="<br /><table bgcolor=\"#aaffaa\"><tr><td>$message</td></tr></table>";
    }
    my $tries = $Apache::lonhomework::history{"resource.$id.tries"};
    my $maxtries = &Apache::lonnet::EXT("resource.$id.maxtries");
    &Apache::lonxml::debug("got maxtries of :$maxtries:");
    if ( $tries eq '' ) { $tries = '0'; }
    if ( $maxtries eq '' ) { $maxtries = '2'; } 
    if ( $maxtries eq 'con_lost' ) { $maxtries = '0'; } 
    if ( $showbutton ) {
      $trystr = "<br />Tries $tries/$maxtries";
    }
    if ( $status eq 'SHOW_ANSWER' || $status eq 'CANNOT_ANSWER') {$showbutton = 0;}
    if ( $showbutton ) { 
      $button = '<br /><input type="submit" name="submit" value="Submit All Answers" />';
    }
  }
  return $button.$message.$trystr;
}
1;
__END__