$(function() {

  function intersects( list1, list2 ) {
    return _.intersection( list1, list2 ).length > 0;
  }

  WOF.showPolicyMapPopup = function(d, tooltip, payload){
    // Accepts a payload of interventinos, and a dom element to update
    // updates the policy map popup with the correct numbers of intervention
    // present, based on the current active filters
    log.debug("Defaulting to the normal behaviour for now");

    // find function to return a list of interventions in the payload
    // that have the same active filters
    // WOF.selectedCategories;
    counter = 0;

    _.each(payload.interventions_with_kinds, function(p) {
        p.kinds

    });

    tooltip.html(d.properties.hover.split("\n").join('<br>'));
    log.debug(payload);
    log.debug(tooltip);
  };

  WOF.filterDetailPanel = function() {
    $interventionTable = $('table.policy-intervention-table');
    $noInterventions = $('.no-policy-interventions');

    var rowsVisible = 0;
    $interventionTable.find('tbody tr').each(function() {
      var $row = $(this);
      var rowCategories = $(this).data('intervention-types');
      var showRow = intersects( rowCategories, WOF.selectedCategories );
      if(showRow) {
        $row.show();
        rowsVisible++;
      } else {
        $row.hide();
      }
    });
    if(rowsVisible > 0) {
      $interventionTable.show();
      $noInterventions.hide();
    } else {
      $interventionTable.hide();
      $noInterventions.show();
    }

    $('.filtered-count').text(rowsVisible);
  };

  function filterMap() {
    var matchingCountries = _.filter(WOF.allCountryData, function(country) {
      if(country.payload.length > 0) {
        return intersects(country.payload[0].kinds, WOF.selectedCategories);
      }
      return false;
    });
    var matchingCountryIds = _.pluck(matchingCountries, 'iso3166_a3');
    WOF.resetMap(function(countryId) {
      var data = _.contains(matchingCountryIds, countryId) ? 1 : 0;
      return data;
    });
  }

  function setFilterCategories() {
    WOF.selectedCategories = [];
    $('.policy-map-controls input:checked').each(function() {
      WOF.selectedCategories.push( $(this).attr('name') );
    });
  }

  $('.policy-map-controls input[type=checkbox]').change(function() {
    $(this).parent().toggleClass('inactive');
    setFilterCategories();
    filterMap();
    WOF.filterDetailPanel();
  });

  setFilterCategories();
});