%script#registration-data{type: :json}=@registration_data.to_json.to_s.html_safe
= columns(medium: 12) do
  = admin_update_form id: 'search-form' do
    = searchfield :search, nil, big: true
    %table#search-results
      %thead
        %tr
          %th.corner
          %th Email
          %th Location
          %th Organization
          %th Status
      %tbody

    %p#no-search.search-message Search for a user by name, email, location, or organization
    %p#no-results.search-message No matching user was found, enter an email address to regster a new user
    #new-user.actions.center=link_to 'Register %{email}', check_in_path(@this_conference.slug, 'new_user').gsub('new_user', '%{url_email}'), class: :button
    %template#search-result
      %tr.registration{tabindex: 0}
        %th.name= link_to '%{name}', check_in_path(@this_conference.slug, 'user_id').gsub('user_id', '%{user_id}')
        %td %{email}
        %td %{location}
        %td %{organization}
        %td.no-wrap %{status}
:javascript
  var searchTable = null,
    searchField = null,
    lastSearch = null,
    registrationData = null,
    newUserMessage = null,
    newUserMessageTemplate = null,
    searchResultTemplate = null,
    searchForm = null,
    searchFields = ['email', 'name', 'location', 'oranization'];

  function getRegistrationData() {
    return JSON.parse(document.getElementById('registration-data').innerHTML);
  }

  function getSearchTable() {
    return document.getElementById('search-results').getElementsByTagName('tbody')[0];
  }

  function getSearchResultTemplate() {
    return document.getElementById('search-result').innerHTML;
  }

  function matchScore(data, terms) {
    var score = 0;
    for (var i = 0; i < terms.length; i++) {
      var keys = Object.keys(data), termPos = -1;
      for (var j = 0; j < keys.length; j++) {
        var dataItem = data[keys[j]];
        if (typeof(dataItem) === "string" && dataItem.length > 0) {
          dataItem = dataItem.toLocaleLowerCase();
          var index = dataItem.indexOf(' ' + terms[i]);
          if (index < 0) {
            index = dataItem.indexOf(terms[i]);
          } else {
            index = 0;
          }
          if (index >= 0 && (termPos < 0 || index < termPos)) {
            termPos = index;
          }
        }
      }
      if (termPos >= 0) {
        score += (termPos > 0 ? 10 : 20);
      } else {
        return 0;
      }
    }
    return score + data['sort_weight'];
  }

  function searchResultHTML(data) {
    if (searchResultTemplate === null) {
      searchResultTemplate = getSearchResultTemplate();
    }

    var keys = Object.keys(data), html = searchResultTemplate;
    for (var i = 0; i < keys.length; i++) {
      var value = data[keys[i]];
      if (value === null) {
        value = '';
      }
      html = html.replace(new RegExp('%\\{' + keys[i] + '\\}', 'ig'), value);
    }

    return html;
  }

  function filterSearchResults() {
    if (searchTable === null) {
      searchTable = getSearchTable();
    }
    if (searchField === null) {
      searchField = document.getElementById('search');
    }
    if (searchForm === null) {
      searchForm = document.getElementById('search-form');
    }

    var searchTerm = searchField.value.toLocaleLowerCase().trim();

    if (searchTerm != lastSearch) {
      searchForm.classList.add('requesting');

      var range = document.createRange();
      range.selectNodeContents(searchTable);
      range.deleteContents();

      lastSearch = searchTerm;
      var status = null;

      if (searchTerm.length > 0) {
        var terms = searchTerm.split(/\s+/);
        if (registrationData === null) {
          registrationData = getRegistrationData();
        }

        var matches = [];
        for (var i = 0; i < registrationData.length; i++) {
          var score = matchScore(registrationData[i], terms);
          if (score > 0) {
            matches.push({ score: score, data: registrationData[i] });
          }
        }

        if (matches.length > 0) {
          matches.sort(function(a, b) { return b.score - a.score; });

          var html = '';
          for (var i = 0; i < matches.length; i++) {
            html += searchResultHTML(matches[i].data);
          }
          searchTable.innerHTML = html;

          status = 'success';
        } else if (searchTerm.match(/^\S+@\S+\.\S{2,}$/)) {
          status = 'new-user';
          if (newUserMessage === null) {
            newUserMessage = document.getElementById('new-user');
            newUserMessageTemplate = newUserMessage.innerHTML;
          }
          newUserMessage.innerHTML = newUserMessageTemplate.replace(/%\{email\}/g, searchTerm).replace(/%\{url_email\}/g, encodeURIComponent(searchTerm));
        } else {
          status = 'no-results';
        }
      } else {
        status = 'no-search';
      }

      searchForm.setAttribute('data-status', status);
      searchForm.classList.remove('requesting');
    }
  }

  document.addEventListener('click', function(event) {
    if (searchTable === null) {
      searchTable = getSearchTable();
    }
    var target = event.target;
    if (searchTable.contains(target)) {
      while (target.tagName !== 'TR') {
        target = target.parentElement;
      }
      var link = target.getElementsByTagName('a')[0];
      window.location.href = link.href;
    }
  });
  document.addEventListener('keyup', filterSearchResults);

  filterSearchResults();