(function collonadeClosure() {
  'use strict';

  document.addEventListener('DOMContentLoaded', function DOMContentLoaded() {

    var ASC = 'asc';
    var DESC = 'desc';

    function setupAsync(wrapper) {

      var table = wrapper.querySelector('#' + #{String $ dbtIdent});
      var ths = Array.from(table.querySelectorAll('th.sortable'));
      if (ths) {
        // attach click handler to each sortable column if any
        ths.forEach(function(th) {
          th.addEventListener('click', clickHandler);
        });
      }

      var pagination = wrapper.querySelector('#' + #{String $ dbtIdent} + '-pagination');
      if (pagination) {
        var paginationLinks = Array.from(pagination.querySelectorAll('.pagination-link'));
        // attach click handler to pagination links if any
        paginationLinks.forEach(function(p) {
          p.addEventListener('click', clickHandler);
        });
      }

      function clickHandler(event) {
        event.preventDefault();
        var url = new URL(window.location.origin + window.location.pathname + getClickDestination(this));
        url.searchParams.set(#{String $ wIdent "table-only"}, 'yes');
        updateTableFrom(url);
      }

      function getClickDestination(el) {
        var link = el.querySelector('a');
        if (!link) { return false; }
        return link.getAttribute('href');
      }

      // fetches new sorted table from url with params and replaces contents of current table
      function updateTableFrom(url) {
        fetch(url, {
          credentials: 'same-origin',
          headers: {
            'Accept': 'text/html'
          }
        }).then(function(response) {
          var contentType = response.headers.get("content-type");
          if (!response.ok) {
            throw ('Looks like there was a problem fetching ' + url.toString() + '. Status Code: ' + response.status);
          }
          return response.text();
        }).then(function(data) {
          // replace contents of table body
          wrapper.innerHTML = data;
          // set up async functionality again
          setupAsync(wrapper);
          table.querySelector('tbody').innerHTML = data;
        }).catch(function(err) {
          console.error(err);
        });
      }
    }

    var selector = '#' + #{String $ dbtIdent} + '-table-wrapper';
    setupAsync(document.querySelector(selector));
  });
})();