/*******************************************************************************
 * 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
 * ******************************************************************************
 * Mats Alm   		                Added       		        2011-01-08
 * Jan Källman		                License changed GPL-->LGPL  2011-12-27
 *******************************************************************************/

using System;
using System.Globalization;
using System.Xml;
using OfficeOpenXml.DataValidation.Formulas.Contracts;

namespace OfficeOpenXml.DataValidation.Formulas;

internal class ExcelDataValidationFormulaTime
    : ExcelDataValidationFormulaValue<ExcelTime>,
      IExcelDataValidationFormulaTime {
  public ExcelDataValidationFormulaTime(
      XmlNamespaceManager namespaceManager,
      XmlNode topNode,
      string formulaPath)
      : base(namespaceManager, topNode, formulaPath) {
    var value = GetXmlNodeString(formulaPath);
    if (!string.IsNullOrEmpty(value)) {
      decimal time = default(decimal);
      if (decimal.TryParse(value, NumberStyles.Any, CultureInfo.InvariantCulture, out time)) {
        Value = new(time);
      } else {
        Value = new();
        ExcelFormula = value;
      }
    } else {
      Value = new();
    }
    Value.TimeChanged += Value_TimeChanged;
  }

  private void Value_TimeChanged(object sender, EventArgs e) {
    SetXmlNodeString(FormulaPath, Value.ToExcelString());
  }

  protected override string GetValueAsString() {
    if (State == FormulaState.Value) {
      return Value.ToExcelString();
    }
    return string.Empty;
  }

  internal override void ResetValue() {
    Value = new();
  }
}