(function ($) {
  'use strict';

  //button select all or cancel
  $("#select-all").click(function () {
    var all = $("input.select-all")[0];
    all.checked = !all.checked
    var checked = all.checked;
    $("input.select-item").each(function (index, item) {
      item.checked = checked;
    });
    checkSelected();
  });

  //button select invert
  $("#select-invert").click(function () {
    $("input.select-item").each(function (index, item) {
      item.checked = !item.checked;
    });
    checkSelected();
  });

  //button get selected info
  $("#selected").click(function () {
    var items = [];
    $("input.select-item:checked:checked").each(function (index, item) {
      items[index] = item.value;
    });
    if (items.length < 1) {
      alert("no selected items!!!");
    } else {
      var values = items.filter(function (e) { return e != ""; }).join(',');
      var html = $("<div></div>");
      html.html("selected:" + values);
      html.appendTo("body");
    }
  });

  //column checkbox select all or cancel
  $("input.select-all").click(function () {
    var checked = this.checked;
    $("input.select-item").each(function (index, item) {
      item.checked = checked;
    });
    checkSelected();
  });

  //check selected items
  $("input.select-item").click(function () {
    var checked = this.checked;
    checkSelected();
  });

  //check is all selected
  function checkSelected() {
    var all = $("input.select-all")[0];
    var total = $("input.select-item").length;
    var len = $("input.select-item:checked").length;
    var html = $('<span class="badge badge-secondary">' + len + " / " + total + " 已选择" + '</span>');
    $("#checkbox-selected-count").html(html);
    all.checked = len === total;
  }

})(jQuery);