﻿/*******************************************************************************
 * 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       		        2013-03-01 (Prior file history on https://github.com/swmal/ExcelFormulaParser)
 *******************************************************************************/

using System.Linq;

namespace AppsheetEpplus;

public class NamedValueExpression : AtomicExpression {
  public NamedValueExpression(string expression, ParsingContext parsingContext)
      : base(expression) {
    _parsingContext = parsingContext;
  }

  private readonly ParsingContext _parsingContext;

  public override CompileResult Compile() {
    var c = _parsingContext.Scopes.Current;
    var name = _parsingContext.ExcelDataProvider.GetName(c.Address.Worksheet, ExpressionString);
    //var result = _parsingContext.Parser.Parse(value.ToString());

    if (name == null) {
      throw (new ExcelErrorValueException(ExcelErrorValue.Create(eErrorType.Name)));
    }
    if (name.Value == null) {
      return null;
    }
    if (name.Value is ExcelDataProvider.IRangeInfo range) {
      if (range.IsMulti) {
        return new(range, DataType.Enumerable);
      }
      if (range.IsEmpty) {
        return null;
      }
      var factory = new CompileResultFactory();
      return factory.Create(range.First().Value);
    }
    {
      var factory = new CompileResultFactory();
      return factory.Create(name.Value);
    }

    //return new CompileResultFactory().Create(result);
  }
}