﻿/*******************************************************************************
 * You may amend and distribute as you like, but don't remove this header!
 *
 * EPPlus provides server-side generation of Excel 2007/2010 spreadsheets.
 * See http://www.codeplex.com/EPPlus for details.
 *
 * Copyright (C) 2011  Jan Källman
 *
 * This library is free software; you can redistribute it and/or
 * modify it under the terms of the GNU Lesser General Public
 * License as published by the Free Software Foundation; either
 * version 2.1 of the License, or (at your option) any later version.

 * This library is distributed in the hope that it will be useful,
 * but WITHOUT ANY WARRANTY; without even the implied warranty of
 * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.
 * See the GNU Lesser General Public License for more details.
 *
 * The GNU Lesser General Public License can be viewed at http://www.opensource.org/licenses/lgpl-license.php
 * If you unfamiliar with this license or have questions about it, here is an http://www.gnu.org/licenses/gpl-faq.html
 *
 * All code and executables are provided "as is" with no warranty either express or implied.
 * The author accepts no liability for any damage or loss of business that this product may cause.
 *
 * Code change notes:
 *
 * Author							Change						Date
 * ******************************************************************************
 * Jan Källman		Added		21-MAR-2011
 * Jan Källman		License changed GPL-->LGPL 2011-12-16
 *******************************************************************************/

using System;
using System.Xml;

namespace OfficeOpenXml.Table.PivotTable;

/// <summary>
/// A field Item. Used for grouping
/// </summary>
public class ExcelPivotTableFieldItem : XmlHelper {
  private ExcelPivotTableField _field;

  internal ExcelPivotTableFieldItem(
      XmlNamespaceManager ns,
      XmlNode topNode,
      ExcelPivotTableField field)
      : base(ns, topNode) {
    _field = field;
  }

  /// <summary>
  /// The text. Unique values only
  /// </summary>
  public string Text {
    get => GetXmlNodeString("@n");
    set {
      if (string.IsNullOrEmpty(value)) {
        DeleteNode("@n");
        return;
      }
      foreach (var item in _field.Items) {
        if (item.Text == value) {
          throw (new ArgumentException("Duplicate Text"));
        }
      }
      SetXmlNodeString("@n", value);
    }
  }

  internal int X => GetXmlNodeInt("@x");

  internal string T => GetXmlNodeString("@t");
}