(function ($) {
  'use strict';

  $.extend(true, $.fn.dataTable.defaults, {
    'sDom': '<\'row\'<\'col-sm-6\'l <\'toolbar\'>><\'col-sm-6\'f>r><\'table-responsive\'t><\'datatable-bottom\'<\'pull-left\'i><\'pull-right\'p>>',
    'sPaginationType': 'bootstrap',
    'oLanguage': {
      'sSearch': '',
      'sSearchPlaceholder': 'Search'
    },
  });

  /* Default class modification */
  $.extend($.fn.dataTableExt.oStdClasses, {
    'sWrapper': 'dataTables_wrapper form-inline',
    'sFilterInput': 'form-control',
    'sLengthSelect': 'form-control',
  });

  /* API method to get paging information */
  $.fn.dataTableExt.oApi.fnPagingInfo = function (oSettings) {
    return {
      'iStart': oSettings._iDisplayStart,
      'iEnd': oSettings.fnDisplayEnd(),
      'iLength': oSettings._iDisplayLength,
      'iTotal': oSettings.fnRecordsTotal(),
      'iFilteredTotal': oSettings.fnRecordsDisplay(),
      'iPage': oSettings._iDisplayLength === -1 ?
        0 : Math.ceil(oSettings._iDisplayStart / oSettings._iDisplayLength),
      'iTotalPages': oSettings._iDisplayLength === -1 ?
        0 : Math.ceil(oSettings.fnRecordsDisplay() / oSettings._iDisplayLength)
    };
  };

  /* Bootstrap style pagination control */
  $.extend($.fn.dataTableExt.oPagination, {
    'bootstrap': {
      'fnInit': function (oSettings, nPaging, fnDraw) {
        var oLang = oSettings.oLanguage.oPaginate;
        var fnClickHandler = function (e) {
          e.preventDefault();
          if (oSettings.oApi._fnPageChange(oSettings, e.data.action)) {
            fnDraw(oSettings);
          }
        };

        $(nPaging).append(
          '<ul class=\'pagination no-margin\'>' +
          '<li class=\'prev disabled\'><a href=\'#\' title=\'' + oLang.sPrevious + '\'>←</a></li>' +
          '<li class=\'next disabled\'><a href=\'#\' title=\'' + oLang.sNext + '\'>→</a></li>' +
          '</ul>'
        );
        var els = $('a', nPaging);
        $(els[0]).bind('click.DT', {
          action: 'previous'
        }, fnClickHandler);
        $(els[1]).bind('click.DT', {
          action: 'next'
        }, fnClickHandler);
      },

      'fnUpdate': function (oSettings, fnDraw) {
        var iListLength = 4;
        var oPaging = oSettings.oInstance.fnPagingInfo();
        var an = oSettings.aanFeatures.p;
        var i, ien, j, sClass, iStart, iEnd, iHalf = Math.floor(iListLength / 2);

        if (oPaging.iTotalPages < iListLength) {
          iStart = 1;
          iEnd = oPaging.iTotalPages;
        } else if (oPaging.iPage <= iHalf) {
          iStart = 1;
          iEnd = iListLength;
        } else if (oPaging.iPage >= (oPaging.iTotalPages - iHalf)) {
          iStart = oPaging.iTotalPages - iListLength + 1;
          iEnd = oPaging.iTotalPages;
        } else {
          iStart = oPaging.iPage - iHalf + 1;
          iEnd = iStart + iListLength - 1;
        }

        for (i = 0, ien = an.length; i < ien; i++) {
          // Remove the middle elements
          $('li:gt(0)', an[i]).filter(':not(:last)').remove();

          // Add the new list items and their event handlers
          for (j = iStart; j <= iEnd; j++) {
            sClass = (j === oPaging.iPage + 1) ? 'class=\'active\'' : '';
            /*jshint -W083 */
            $('<li ' + sClass + '><a href=\'#\'>' + j + '</a></li>')
              .insertBefore($('li:last', an[i])[0])
              .on('click', function (e) {
                e.preventDefault();
                oSettings._iDisplayStart = (parseInt($('a', this).text(), 10) - 1) * oPaging.iLength;
                fnDraw(oSettings);
              });
          }

          // Add / remove disabled classes from the static elements
          if (oPaging.iPage === 0) {
            $('li:first', an[i]).addClass('disabled');
          } else {
            $('li:first', an[i]).removeClass('disabled');
          }

          if (oPaging.iPage === oPaging.iTotalPages - 1 || oPaging.iTotalPages === 0) {
            $('li:last', an[i]).addClass('disabled');
          } else {
            $('li:last', an[i]).removeClass('disabled');
          }
        }
      }
    }
  });

  /*
   * TableTools Bootstrap compatibility
   * Required TableTools 2.1+
   */
  if ($.fn.DataTable.TableTools) {
    // Set the classes that TableTools uses to something suitable for Bootstrap
    $.extend(true, $.fn.DataTable.TableTools.classes, {
      'container': 'DTTT btn-group',
      'buttons': {
        'normal': 'btn btn-default',
        'disabled': 'disabled'
      },
      'collection': {
        'container': 'DTTT_dropdown dropdown-menu',
        'buttons': {
          'normal': '',
          'disabled': 'disabled'
        }
      },
      'print': {
        'info': 'DTTT_print_info modal'
      },
      'select': {
        'row': 'active'
      }
    });

    // Have the collection use a bootstrap compatible dropdown
    $.extend(true, $.fn.DataTable.TableTools.DEFAULTS.oTags, {
      'collection': {
        'container': 'ul',
        'button': 'li',
        'liner': 'a'
      }
    });
  }

})(jQuery);