// Util: PatternFly TreeGrid Tables
(function ($) {
  'use strict';

  function getParent (rows, node) {
    var parent = node.attr('data-parent');

    if (typeof parent === "string") {
      if (isNaN(parent)) {
        parent = rows.closest(parent);
      } else {
        parent = $(rows[parseInt(parent, 10)]);
      }
      return parent;
    }
    return undefined;
  }

  function renderItem (item, parent) {
    if (parent) {
      parent.find('.treegrid-node > span.expand-icon')
        .toggleClass('fa-angle-right', parent.hasClass('collapsed'))
        .toggleClass('fa-angle-down', !parent.hasClass('collapsed'));
      item.toggleClass('hidden', parent.hasClass('collapsed'));
      if (parent.hasClass('collapsed')) {
        item.addClass('collapsed');
      }
    }
  }

  function reStripe (tree) {
    tree.find('tbody > tr').removeClass('odd');
    tree.find('tbody > tr:not(.hidden):odd').addClass('odd');
  }

  $.fn.treegrid = function (options) {
    var i, rows, _this;
    rows = this.find('tbody > tr');
    _this = this;
    $.each(rows, function () {
      var node, parent;
      node = $(this);
      parent = getParent(rows, node);
      // Append expand icon dummies
      node.children('.treegrid-node').prepend('<span class="icon expand-icon fa"/>');

      // Set up an event listener for the node
      node.children('.treegrid-node').on('click', function (e) {
        var icon = node.find('span.expand-icon');

        if (options && typeof options.callback === 'function') {
          options.callback(e);
        }

        if (icon.hasClass('fa-angle-right')) {
          node.removeClass('collapsed');
        }
        if (icon.hasClass('fa-angle-down')) {
          node.addClass('collapsed');
        }
        $.each(rows.slice(rows.index(node) + 1), function () {
          renderItem($(this), getParent(rows, $(this)));
        });
        reStripe(_this);
      });

      if (parent) {
        // Calculate indentation depth
        i = parent.find('.treegrid-node > span.indent').length + 1;
        for (; i > 0; i -= 1) {
          node.children('.treegrid-node').prepend('<span class="indent"/>');
        }
        // Render expand/collapse icons
        renderItem(node, parent);
      }
    });
    reStripe(_this);
  };
}(jQuery));
