/*******************************************************************************
 * 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		                Initial Release		        2009-10-01
 * Jan Källman		License changed GPL-->LGPL 2011-12-16
 *******************************************************************************/

using System;
using System.Globalization;
using System.Xml;

namespace OfficeOpenXml.Style.XmlAccess;

/// <summary>
/// Xml access class for border items
/// </summary>
public sealed class ExcelBorderItemXml : StyleXmlHelper {
  internal ExcelBorderItemXml(XmlNamespaceManager nameSpaceManager)
      : base(nameSpaceManager) {
    _borderStyle = ExcelBorderStyle.None;
    _color = new(NameSpaceManager);
  }

  internal ExcelBorderItemXml(XmlNamespaceManager nsm, XmlNode topNode)
      : base(nsm, topNode) {
    if (topNode != null) {
      _borderStyle = GetBorderStyle(GetXmlNodeString("@style"));
      _color = new(nsm, topNode.SelectSingleNode(_colorPath, nsm));
      Exists = true;
    } else {
      Exists = false;
    }
  }

  private ExcelBorderStyle GetBorderStyle(string style) {
    if (style == "") {
      return ExcelBorderStyle.None;
    }
    return Enum.TryParse<ExcelBorderStyle>(style, true, out var result)
        ? result
        : ExcelBorderStyle.None;
  }

  private ExcelBorderStyle _borderStyle = ExcelBorderStyle.None;

  /// <summary>
  /// Cell Border style
  /// </summary>
  public ExcelBorderStyle Style {
    get => _borderStyle;
    set {
      _borderStyle = value;
      Exists = true;
    }
  }

  private ExcelColorXml _color;
  private const string _colorPath = "d:color";

  /// <summary>
  /// Border style
  /// </summary>
  public ExcelColorXml Color {
    get => _color;
    internal set => _color = value;
  }

  internal override string Id {
    get {
      if (Exists) {
        return Style + Color.Id;
      }
      return "None";
    }
  }

  internal ExcelBorderItemXml Copy() {
    ExcelBorderItemXml borderItem = new ExcelBorderItemXml(NameSpaceManager);
    borderItem.Style = _borderStyle;
    borderItem.Color = _color.Copy();
    return borderItem;
  }

  internal override XmlNode CreateXmlNode(XmlNode topNode) {
    TopNode = topNode;

    if (Style != ExcelBorderStyle.None) {
      SetXmlNodeString("@style", SetBorderString(Style));
      if (Color.Exists) {
        CreateNode(_colorPath);
        topNode.AppendChild(
            Color.CreateXmlNode(TopNode.SelectSingleNode(_colorPath, NameSpaceManager)));
      }
    }
    return TopNode;
  }

  private string SetBorderString(ExcelBorderStyle style) {
    string newName = Enum.GetName(typeof(ExcelBorderStyle), style);
    return newName.Substring(0, 1).ToLower(CultureInfo.InvariantCulture)
        + newName.Substring(1, newName.Length - 1);
  }

  public bool Exists { get; private set; }
}