(function ($) {

Drupal.behaviors.nodequeueDrag = {
  attach: function(context) {
    var tableDrag = Drupal.tableDrag['nodequeue-dragdrop'];

    tableDrag.onDrop = function() {
      $('td.position').each(function(i){
        $(this).html(i + 1);
      });

      nodequeueUpdateNodePositions();
    }
  }
};

Drupal.behaviors.nodequeueReverse = {
  attach: function(context) {
    $('#edit-reverse').click(function(){
      // reverse table rows...
      $('tr.draggable').each(function(i){
        $('.nodequeue-dragdrop tbody').prepend(this);
      });

      nodequeueUpdateNodePositions();
      nodequeueInsertChangedWarning();
      nodequeueRestripeTable();

      return false;
    });
  }
};

Drupal.behaviors.nodequeueShuffle = {
  attach: function(context) {
    $('#edit-shuffle').click(function(){
      // randomize table rows...
      var rows = $('table.nodequeue-dragdrop tbody tr:not(:hidden)').get();
      rows.sort(function(){return (Math.round(Math.random())-0.5);});
      $.each(rows, function(i, row) {
        $('.nodequeue-dragdrop tbody').prepend(this);
      });

      nodequeueUpdateNodePositions();
      nodequeueInsertChangedWarning();
      nodequeueRestripeTable();

      return false;
    });
  }
};

Drupal.behaviors.nodequeueClear = {
  attach: function(context) {
    $('#edit-clear').click(function(){
      // mark nodes for removal
      $('.node-position').each(function(i){
        $(this).val('r');
      });

      // remove table rows...
      rows = $('table.nodequeue-dragdrop tbody tr:not(:hidden)').hide();

      nodequeuePrependEmptyMessage();
      nodequeueInsertChangedWarning();

      return false;
    });
  }
};

Drupal.behaviors.nodequeueRemoveNode = {
  attach: function(context) {
    $('a.nodequeue-remove').css('display', 'block');
    $('a.nodequeue-remove').click(function() {
      a = $(this).attr('id');
      a = '#' + a.replace('nodequeue-remove-', 'edit-') + '-position';
      $(a).val('r');

      // hide the current row
      $(this).parent().parent().fadeOut('fast', function(){
        if ($('table.nodequeue-dragdrop tbody tr:not(:hidden)').size() == 0) {
          nodequeuePrependEmptyMessage();
        }
        else {
          nodequeueRestripeTable()
          nodequeueInsertChangedWarning();
        }
      });

      return false;
    });
  }
}

Drupal.behaviors.nodequeueClearTitle = {
  attach: function(context) {
    $('#edit-add-nid').focus(function() {
      if (this.value == this.defaultValue) {
        this.value = '';
        $(this).css('color', '#000');
      }
    }).blur(function(){
      if (!this.value.length) {
        this.value = this.defaultValue;
        $(this).css('color', '#999');
      }
    });
  }
}

/**
 * Updates node positions after nodequeue has been rearranged.
 * It cares about the reverse order and populates nodes the other way round.
 */
function nodequeueUpdateNodePositions() {
  // Check if reverse option is set.
  var reverse = Drupal.settings.nodequeue.reverse;
  var size = reverse ? $('.node-position').size() : 1;

  $('.node-position').each(function(i){
    $(this).val(size);
    reverse ? size-- : size++;
  });
}

/**
 * Restripe the nodequeue table after removing an element or changing the
 * order of the elements.
 */
function nodequeueRestripeTable() {
  $('table.nodequeue-dragdrop tbody tr:not(:hidden)')
  .filter(':odd')
    .removeClass('odd').addClass('even')
      .end()
  .filter(':even')
    .removeClass('even').addClass('odd')
      .end();

  $('tr:visible td.position').each(function(i){
    $(this).html(i + 1);
  });
}

/**
 * Add a row to the nodequeue table explaining that the queue is empty.
 */
function nodequeuePrependEmptyMessage() {
  $('.nodequeue-dragdrop tbody').prepend('<tr class="odd"><td colspan="6">'+Drupal.t('No nodes in this queue.')+'</td></tr>');
}

/**
 * Display a warning reminding the user to save the nodequeue.
 */
function nodequeueInsertChangedWarning() {
  if (Drupal.tableDrag['nodequeue-dragdrop'].changed == false) {
    $(Drupal.theme('tableDragChangedWarning')).insertAfter('.nodequeue-dragdrop').hide().fadeIn('slow');
    Drupal.tableDrag['nodequeue-dragdrop'].changed = true;
  }
}

})(jQuery);